summaryrefslogtreecommitdiffstats
path: root/src/readconf.c
blob: f962f9029e1e926768b6754244d74896bae2527c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
4216
4217
4218
4219
4220
4221
4222
4223
4224
4225
4226
4227
4228
4229
4230
4231
4232
4233
4234
4235
4236
4237
4238
4239
4240
4241
4242
4243
4244
4245
4246
4247
4248
4249
4250
4251
4252
4253
4254
4255
4256
4257
4258
4259
4260
4261
4262
4263
4264
4265
4266
4267
4268
4269
4270
4271
4272
4273
4274
4275
4276
4277
4278
4279
4280
4281
4282
4283
4284
4285
4286
4287
4288
4289
4290
4291
4292
4293
4294
4295
4296
4297
4298
4299
4300
4301
4302
4303
4304
4305
4306
4307
4308
4309
4310
4311
4312
4313
4314
4315
4316
4317
4318
4319
4320
4321
4322
4323
4324
4325
4326
4327
4328
4329
4330
4331
4332
4333
4334
4335
4336
4337
4338
4339
4340
4341
4342
4343
4344
4345
4346
4347
4348
4349
4350
4351
4352
4353
4354
4355
4356
4357
4358
4359
4360
4361
4362
4363
4364
4365
4366
4367
4368
4369
4370
4371
4372
4373
4374
4375
4376
4377
4378
4379
4380
4381
4382
4383
4384
4385
4386
4387
4388
4389
4390
4391
4392
4393
4394
4395
4396
4397
4398
4399
4400
4401
4402
4403
4404
4405
4406
4407
4408
4409
4410
4411
4412
4413
4414
4415
4416
4417
4418
4419
4420
4421
4422
4423
4424
4425
4426
4427
4428
4429
4430
4431
4432
4433
4434
4435
4436
4437
4438
4439
4440
4441
4442
4443
4444
4445
4446
4447
4448
4449
4450
4451
4452
4453
4454
4455
4456
4457
4458
4459
4460
4461
4462
4463
4464
4465
4466
4467
4468
4469
4470
4471
4472
4473
4474
4475
4476
4477
4478
4479
4480
4481
4482
4483
4484
4485
4486
4487
4488
4489
4490
4491
4492
4493
/*************************************************
*     Exim - an Internet mail transport agent    *
*************************************************/

/* Copyright (c) University of Cambridge 1995 - 2018 */
/* Copyright (c) The Exim Maintainers 2020 */
/* See the file NOTICE for conditions of use and distribution. */

/* Functions for reading the configuration file, and for displaying
overall configuration values. Thanks to Brian Candler for the original
implementation of the conditional .ifdef etc. */

#include "exim.h"

#ifdef MACRO_PREDEF
# include "macro_predef.h"
#endif

#define READCONF_DEBUG	if (FALSE)	/* Change to TRUE to enable */


static uschar * syslog_facility_str;
static void fn_smtp_receive_timeout(const uschar *, const uschar *, unsigned);

/*************************************************
*           Main configuration options           *
*************************************************/

/* The list of options that can be set in the main configuration file. This
must be in alphabetic order because it is searched by binary chop. */

static optionlist optionlist_config[] = {
  { "*set_exim_group",          opt_bool|opt_hidden, {&exim_gid_set} },
  { "*set_exim_user",           opt_bool|opt_hidden, {&exim_uid_set} },
  { "*set_system_filter_group", opt_bool|opt_hidden, {&system_filter_gid_set} },
  { "*set_system_filter_user",  opt_bool|opt_hidden, {&system_filter_uid_set} },
  { "accept_8bitmime",          opt_bool,        {&accept_8bitmime} },
  { "acl_not_smtp",             opt_stringptr,   {&acl_not_smtp} },
#ifdef WITH_CONTENT_SCAN
  { "acl_not_smtp_mime",        opt_stringptr,   {&acl_not_smtp_mime} },
#endif
  { "acl_not_smtp_start",       opt_stringptr,   {&acl_not_smtp_start} },
  { "acl_smtp_auth",            opt_stringptr,   {&acl_smtp_auth} },
  { "acl_smtp_connect",         opt_stringptr,   {&acl_smtp_connect} },
  { "acl_smtp_data",            opt_stringptr,   {&acl_smtp_data} },
#ifndef DISABLE_PRDR
  { "acl_smtp_data_prdr",       opt_stringptr,   {&acl_smtp_data_prdr} },
#endif
#ifndef DISABLE_DKIM
  { "acl_smtp_dkim",            opt_stringptr,   {&acl_smtp_dkim} },
#endif
  { "acl_smtp_etrn",            opt_stringptr,   {&acl_smtp_etrn} },
  { "acl_smtp_expn",            opt_stringptr,   {&acl_smtp_expn} },
  { "acl_smtp_helo",            opt_stringptr,   {&acl_smtp_helo} },
  { "acl_smtp_mail",            opt_stringptr,   {&acl_smtp_mail} },
  { "acl_smtp_mailauth",        opt_stringptr,   {&acl_smtp_mailauth} },
#ifdef WITH_CONTENT_SCAN
  { "acl_smtp_mime",            opt_stringptr,   {&acl_smtp_mime} },
#endif
  { "acl_smtp_notquit",         opt_stringptr,   {&acl_smtp_notquit} },
  { "acl_smtp_predata",         opt_stringptr,   {&acl_smtp_predata} },
  { "acl_smtp_quit",            opt_stringptr,   {&acl_smtp_quit} },
  { "acl_smtp_rcpt",            opt_stringptr,   {&acl_smtp_rcpt} },
#ifndef DISABLE_TLS
  { "acl_smtp_starttls",        opt_stringptr,   {&acl_smtp_starttls} },
#endif
  { "acl_smtp_vrfy",            opt_stringptr,   {&acl_smtp_vrfy} },
  { "add_environment",          opt_stringptr,   {&add_environment} },
  { "admin_groups",             opt_gidlist,     {&admin_groups} },
  { "allow_domain_literals",    opt_bool,        {&allow_domain_literals} },
  { "allow_mx_to_ip",           opt_bool,        {&allow_mx_to_ip} },
  { "allow_utf8_domains",       opt_bool,        {&allow_utf8_domains} },
  { "auth_advertise_hosts",     opt_stringptr,   {&auth_advertise_hosts} },
  { "auto_thaw",                opt_time,        {&auto_thaw} },
#ifdef WITH_CONTENT_SCAN
  { "av_scanner",               opt_stringptr,   {&av_scanner} },
#endif
  { "bi_command",               opt_stringptr,   {&bi_command} },
#ifdef EXPERIMENTAL_BRIGHTMAIL
  { "bmi_config_file",          opt_stringptr,   {&bmi_config_file} },
#endif
  { "bounce_message_file",      opt_stringptr,   {&bounce_message_file} },
  { "bounce_message_text",      opt_stringptr,   {&bounce_message_text} },
  { "bounce_return_body",       opt_bool,        {&bounce_return_body} },
  { "bounce_return_linesize_limit", opt_mkint,   {&bounce_return_linesize_limit} },
  { "bounce_return_message",    opt_bool,        {&bounce_return_message} },
  { "bounce_return_size_limit", opt_mkint,       {&bounce_return_size_limit} },
  { "bounce_sender_authentication",opt_stringptr,{&bounce_sender_authentication} },
  { "callout_domain_negative_expire", opt_time,  {&callout_cache_domain_negative_expire} },
  { "callout_domain_positive_expire", opt_time,  {&callout_cache_domain_positive_expire} },
  { "callout_negative_expire",  opt_time,        {&callout_cache_negative_expire} },
  { "callout_positive_expire",  opt_time,        {&callout_cache_positive_expire} },
  { "callout_random_local_part",opt_stringptr,   {&callout_random_local_part} },
  { "check_log_inodes",         opt_int,         {&check_log_inodes} },
  { "check_log_space",          opt_Kint,        {&check_log_space} },
  { "check_rfc2047_length",     opt_bool,        {&check_rfc2047_length} },
  { "check_spool_inodes",       opt_int,         {&check_spool_inodes} },
  { "check_spool_space",        opt_Kint,        {&check_spool_space} },
  { "chunking_advertise_hosts", opt_stringptr,	 {&chunking_advertise_hosts} },
  { "commandline_checks_require_admin", opt_bool,{&commandline_checks_require_admin} },
  { "daemon_smtp_port",         opt_stringptr|opt_hidden, {&daemon_smtp_port} },
  { "daemon_smtp_ports",        opt_stringptr,   {&daemon_smtp_port} },
  { "daemon_startup_retries",   opt_int,         {&daemon_startup_retries} },
  { "daemon_startup_sleep",     opt_time,        {&daemon_startup_sleep} },
#ifdef EXPERIMENTAL_DCC
  { "dcc_direct_add_header",    opt_bool,        {&dcc_direct_add_header} },
  { "dccifd_address",           opt_stringptr,   {&dccifd_address} },
  { "dccifd_options",           opt_stringptr,   {&dccifd_options} },
#endif
  { "debug_store",              opt_bool,        {&debug_store} },
  { "delay_warning",            opt_timelist,    {&delay_warning} },
  { "delay_warning_condition",  opt_stringptr,   {&delay_warning_condition} },
  { "deliver_drop_privilege",   opt_bool,        {&deliver_drop_privilege} },
  { "deliver_queue_load_max",   opt_fixed,       {&deliver_queue_load_max} },
  { "delivery_date_remove",     opt_bool,        {&delivery_date_remove} },
#ifdef ENABLE_DISABLE_FSYNC
  { "disable_fsync",            opt_bool,        {&disable_fsync} },
#endif
  { "disable_ipv6",             opt_bool,        {&disable_ipv6} },
#ifndef DISABLE_DKIM
  { "dkim_verify_hashes",       opt_stringptr,   {&dkim_verify_hashes} },
  { "dkim_verify_keytypes",     opt_stringptr,   {&dkim_verify_keytypes} },
  { "dkim_verify_min_keysizes", opt_stringptr,   {&dkim_verify_min_keysizes} },
  { "dkim_verify_minimal",      opt_bool,        {&dkim_verify_minimal} },
  { "dkim_verify_signers",      opt_stringptr,   {&dkim_verify_signers} },
#endif
#ifdef SUPPORT_DMARC
  { "dmarc_forensic_sender",    opt_stringptr,   {&dmarc_forensic_sender} },
  { "dmarc_history_file",       opt_stringptr,   {&dmarc_history_file} },
  { "dmarc_tld_file",           opt_stringptr,   {&dmarc_tld_file} },
#endif
  { "dns_again_means_nonexist", opt_stringptr,   {&dns_again_means_nonexist} },
  { "dns_check_names_pattern",  opt_stringptr,   {&check_dns_names_pattern} },
  { "dns_cname_loops",		opt_int,	 {&dns_cname_loops} },
  { "dns_csa_search_limit",     opt_int,         {&dns_csa_search_limit} },
  { "dns_csa_use_reverse",      opt_bool,        {&dns_csa_use_reverse} },
  { "dns_dnssec_ok",            opt_int,         {&dns_dnssec_ok} },
  { "dns_ipv4_lookup",          opt_stringptr,   {&dns_ipv4_lookup} },
  { "dns_retrans",              opt_time,        {&dns_retrans} },
  { "dns_retry",                opt_int,         {&dns_retry} },
  { "dns_trust_aa",             opt_stringptr,   {&dns_trust_aa} },
  { "dns_use_edns0",            opt_int,         {&dns_use_edns0} },
 /* This option is now a no-op, retained for compatibility */
  { "drop_cr",                  opt_bool,        {&drop_cr} },
/*********************************************************/
  { "dsn_advertise_hosts",      opt_stringptr,   {&dsn_advertise_hosts} },
  { "dsn_from",                 opt_stringptr,   {&dsn_from} },
  { "envelope_to_remove",       opt_bool,        {&envelope_to_remove} },
  { "errors_copy",              opt_stringptr,   {&errors_copy} },
  { "errors_reply_to",          opt_stringptr,   {&errors_reply_to} },
#ifndef DISABLE_EVENT
  { "event_action",             opt_stringptr,   {&event_action} },
#endif
  { "exim_group",               opt_gid,         {&exim_gid} },
  { "exim_path",                opt_stringptr,   {&exim_path} },
  { "exim_user",                opt_uid,         {&exim_uid} },
  { "exim_version",             opt_stringptr,   {&version_string} },
  { "extra_local_interfaces",   opt_stringptr,   {&extra_local_interfaces} },
  { "extract_addresses_remove_arguments", opt_bool, {&extract_addresses_remove_arguments} },
  { "finduser_retries",         opt_int,         {&finduser_retries} },
  { "freeze_tell",              opt_stringptr,   {&freeze_tell} },
  { "gecos_name",               opt_stringptr,   {&gecos_name} },
  { "gecos_pattern",            opt_stringptr,   {&gecos_pattern} },
#ifndef DISABLE_TLS
  { "gnutls_allow_auto_pkcs11", opt_bool,        {&gnutls_allow_auto_pkcs11} },
  { "gnutls_compat_mode",       opt_bool,        {&gnutls_compat_mode} },
#endif
  { "header_line_maxsize",      opt_int,         {&header_line_maxsize} },
  { "header_maxsize",           opt_int,         {&header_maxsize} },
  { "headers_charset",          opt_stringptr,   {&headers_charset} },
  { "helo_accept_junk_hosts",   opt_stringptr,   {&helo_accept_junk_hosts} },
  { "helo_allow_chars",         opt_stringptr,   {&helo_allow_chars} },
  { "helo_lookup_domains",      opt_stringptr,   {&helo_lookup_domains} },
  { "helo_try_verify_hosts",    opt_stringptr,   {&helo_try_verify_hosts} },
  { "helo_verify_hosts",        opt_stringptr,   {&helo_verify_hosts} },
  { "hold_domains",             opt_stringptr,   {&hold_domains} },
  { "host_lookup",              opt_stringptr,   {&host_lookup} },
  { "host_lookup_order",        opt_stringptr,   {&host_lookup_order} },
  { "host_reject_connection",   opt_stringptr,   {&host_reject_connection} },
  { "hosts_connection_nolog",   opt_stringptr,   {&hosts_connection_nolog} },
#ifdef SUPPORT_PROXY
  { "hosts_proxy",              opt_stringptr,   {&hosts_proxy} },
#endif
  { "hosts_treat_as_local",     opt_stringptr,   {&hosts_treat_as_local} },
#ifdef LOOKUP_IBASE
  { "ibase_servers",            opt_stringptr,   {&ibase_servers} },
#endif
  { "ignore_bounce_errors_after", opt_time,      {&ignore_bounce_errors_after} },
  { "ignore_fromline_hosts",    opt_stringptr,   {&ignore_fromline_hosts} },
  { "ignore_fromline_local",    opt_bool,        {&ignore_fromline_local} },
  { "keep_environment",         opt_stringptr,   {&keep_environment} },
  { "keep_malformed",           opt_time,        {&keep_malformed} },
#ifdef LOOKUP_LDAP
  { "ldap_ca_cert_dir",         opt_stringptr,   {&eldap_ca_cert_dir} },
  { "ldap_ca_cert_file",        opt_stringptr,   {&eldap_ca_cert_file} },
  { "ldap_cert_file",           opt_stringptr,   {&eldap_cert_file} },
  { "ldap_cert_key",            opt_stringptr,   {&eldap_cert_key} },
  { "ldap_cipher_suite",        opt_stringptr,   {&eldap_cipher_suite} },
  { "ldap_default_servers",     opt_stringptr,   {&eldap_default_servers} },
  { "ldap_require_cert",        opt_stringptr,   {&eldap_require_cert} },
  { "ldap_start_tls",           opt_bool,        {&eldap_start_tls} },
  { "ldap_version",             opt_int,         {&eldap_version} },
#endif
  { "local_from_check",         opt_bool,        {&local_from_check} },
  { "local_from_prefix",        opt_stringptr,   {&local_from_prefix} },
  { "local_from_suffix",        opt_stringptr,   {&local_from_suffix} },
  { "local_interfaces",         opt_stringptr,   {&local_interfaces} },
#ifdef HAVE_LOCAL_SCAN
  { "local_scan_timeout",       opt_time,        {&local_scan_timeout} },
#endif
  { "local_sender_retain",      opt_bool,        {&local_sender_retain} },
  { "localhost_number",         opt_stringptr,   {&host_number_string} },
  { "log_file_path",            opt_stringptr,   {&log_file_path} },
  { "log_selector",             opt_stringptr,   {&log_selector_string} },
  { "log_timezone",             opt_bool,        {&log_timezone} },
  { "lookup_open_max",          opt_int,         {&lookup_open_max} },
  { "max_username_length",      opt_int,         {&max_username_length} },
  { "message_body_newlines",    opt_bool,        {&message_body_newlines} },
  { "message_body_visible",     opt_mkint,       {&message_body_visible} },
  { "message_id_header_domain", opt_stringptr,   {&message_id_domain} },
  { "message_id_header_text",   opt_stringptr,   {&message_id_text} },
  { "message_logs",             opt_bool,        {&message_logs} },
  { "message_size_limit",       opt_stringptr,   {&message_size_limit} },
#ifdef SUPPORT_MOVE_FROZEN_MESSAGES
  { "move_frozen_messages",     opt_bool,        {&move_frozen_messages} },
#endif
  { "mua_wrapper",              opt_bool,        {&mua_wrapper} },
#ifdef LOOKUP_MYSQL
  { "mysql_servers",            opt_stringptr,   {&mysql_servers} },
#endif
  { "never_users",              opt_uidlist,     {&never_users} },
  { "notifier_socket",          opt_stringptr,   {&notifier_socket} },
#ifndef DISABLE_TLS
  { "openssl_options",          opt_stringptr,   {&openssl_options} },
#endif
#ifdef LOOKUP_ORACLE
  { "oracle_servers",           opt_stringptr,   {&oracle_servers} },
#endif
  { "percent_hack_domains",     opt_stringptr,   {&percent_hack_domains} },
#ifdef EXIM_PERL
  { "perl_at_start",            opt_bool,        {&opt_perl_at_start} },
  { "perl_startup",             opt_stringptr,   {&opt_perl_startup} },
  { "perl_taintmode",           opt_bool,        {&opt_perl_taintmode} },
#endif
#ifdef LOOKUP_PGSQL
  { "pgsql_servers",            opt_stringptr,   {&pgsql_servers} },
#endif
  { "pid_file_path",            opt_stringptr,   {&pid_file_path} },
  { "pipelining_advertise_hosts", opt_stringptr, {&pipelining_advertise_hosts} },
#ifndef DISABLE_PIPE_CONNECT
  { "pipelining_connect_advertise_hosts", opt_stringptr,
						 {&pipe_connect_advertise_hosts} },
#endif
#ifndef DISABLE_PRDR
  { "prdr_enable",              opt_bool,        {&prdr_enable} },
#endif
  { "preserve_message_logs",    opt_bool,        {&preserve_message_logs} },
  { "primary_hostname",         opt_stringptr,   {&primary_hostname} },
  { "print_topbitchars",        opt_bool,        {&print_topbitchars} },
  { "process_log_path",         opt_stringptr,   {&process_log_path} },
  { "prod_requires_admin",      opt_bool,        {&prod_requires_admin} },
  { "qualify_domain",           opt_stringptr,   {&qualify_domain_sender} },
  { "qualify_recipient",        opt_stringptr,   {&qualify_domain_recipient} },
  { "queue_domains",            opt_stringptr,   {&queue_domains} },
#ifdef EXPERIMENTAL_QUEUE_RAMP
  { "queue_fast_ramp",          opt_bool,        {&queue_fast_ramp} },
#endif
  { "queue_list_requires_admin",opt_bool,        {&queue_list_requires_admin} },
  { "queue_only",               opt_bool,        {&queue_only} },
  { "queue_only_file",          opt_stringptr,   {&queue_only_file} },
  { "queue_only_load",          opt_fixed,       {&queue_only_load} },
  { "queue_only_load_latch",    opt_bool,        {&queue_only_load_latch} },
  { "queue_only_override",      opt_bool,        {&queue_only_override} },
  { "queue_run_in_order",       opt_bool,        {&queue_run_in_order} },
  { "queue_run_max",            opt_stringptr,   {&queue_run_max} },
  { "queue_smtp_domains",       opt_stringptr,   {&queue_smtp_domains} },
  { "receive_timeout",          opt_time,        {&receive_timeout} },
  { "received_header_text",     opt_stringptr,   {&received_header_text} },
  { "received_headers_max",     opt_int,         {&received_headers_max} },
  { "recipient_unqualified_hosts", opt_stringptr, {&recipient_unqualified_hosts} },
  { "recipients_max",           opt_int,         {&recipients_max} },
  { "recipients_max_reject",    opt_bool,        {&recipients_max_reject} },
#ifdef LOOKUP_REDIS
  { "redis_servers",            opt_stringptr,   {&redis_servers} },
#endif
  { "remote_max_parallel",      opt_int,         {&remote_max_parallel} },
  { "remote_sort_domains",      opt_stringptr,   {&remote_sort_domains} },
  { "retry_data_expire",        opt_time,        {&retry_data_expire} },
  { "retry_interval_max",       opt_time,        {&retry_interval_max} },
  { "return_path_remove",       opt_bool,        {&return_path_remove} },
  { "return_size_limit",        opt_mkint|opt_hidden, {&bounce_return_size_limit} },
  { "rfc1413_hosts",            opt_stringptr,   {&rfc1413_hosts} },
  { "rfc1413_query_timeout",    opt_time,        {&rfc1413_query_timeout} },
  { "sender_unqualified_hosts", opt_stringptr,   {&sender_unqualified_hosts} },
  { "slow_lookup_log",          opt_int,         {&slow_lookup_log} },
  { "smtp_accept_keepalive",    opt_bool,        {&smtp_accept_keepalive} },
  { "smtp_accept_max",          opt_int,         {&smtp_accept_max} },
  { "smtp_accept_max_nonmail",  opt_int,         {&smtp_accept_max_nonmail} },
  { "smtp_accept_max_nonmail_hosts", opt_stringptr, {&smtp_accept_max_nonmail_hosts} },
  { "smtp_accept_max_per_connection", opt_int,   {&smtp_accept_max_per_connection} },
  { "smtp_accept_max_per_host", opt_stringptr,   {&smtp_accept_max_per_host} },
  { "smtp_accept_queue",        opt_int,         {&smtp_accept_queue} },
  { "smtp_accept_queue_per_connection", opt_int, {&smtp_accept_queue_per_connection} },
  { "smtp_accept_reserve",      opt_int,         {&smtp_accept_reserve} },
  { "smtp_active_hostname",     opt_stringptr,   {&raw_active_hostname} },
  { "smtp_banner",              opt_stringptr,   {&smtp_banner} },
  { "smtp_check_spool_space",   opt_bool,        {&smtp_check_spool_space} },
  { "smtp_connect_backlog",     opt_int,         {&smtp_connect_backlog} },
  { "smtp_enforce_sync",        opt_bool,        {&smtp_enforce_sync} },
  { "smtp_etrn_command",        opt_stringptr,   {&smtp_etrn_command} },
  { "smtp_etrn_serialize",      opt_bool,        {&smtp_etrn_serialize} },
  { "smtp_load_reserve",        opt_fixed,       {&smtp_load_reserve} },
  { "smtp_max_synprot_errors",  opt_int,         {&smtp_max_synprot_errors} },
  { "smtp_max_unknown_commands",opt_int,         {&smtp_max_unknown_commands} },
  { "smtp_ratelimit_hosts",     opt_stringptr,   {&smtp_ratelimit_hosts} },
  { "smtp_ratelimit_mail",      opt_stringptr,   {&smtp_ratelimit_mail} },
  { "smtp_ratelimit_rcpt",      opt_stringptr,   {&smtp_ratelimit_rcpt} },
  { "smtp_receive_timeout",     opt_func,        {.fn = &fn_smtp_receive_timeout} },
  { "smtp_reserve_hosts",       opt_stringptr,   {&smtp_reserve_hosts} },
  { "smtp_return_error_details",opt_bool,        {&smtp_return_error_details} },
#ifdef SUPPORT_I18N
  { "smtputf8_advertise_hosts", opt_stringptr,   {&smtputf8_advertise_hosts} },
#endif
#ifdef WITH_CONTENT_SCAN
  { "spamd_address",            opt_stringptr,   {&spamd_address} },
#endif
#ifdef SUPPORT_SPF
  { "spf_guess",                opt_stringptr,   {&spf_guess} },
  { "spf_smtp_comment_template",opt_stringptr,   {&spf_smtp_comment_template} },
#endif
  { "split_spool_directory",    opt_bool,        {&split_spool_directory} },
  { "spool_directory",          opt_stringptr,   {&spool_directory} },
  { "spool_wireformat",         opt_bool,        {&spool_wireformat} },
#ifdef LOOKUP_SQLITE
  { "sqlite_dbfile",            opt_stringptr,   {&sqlite_dbfile} },
  { "sqlite_lock_timeout",      opt_int,         {&sqlite_lock_timeout} },
#endif
#ifdef EXPERIMENTAL_SRS
  { "srs_config",               opt_stringptr,   {&srs_config} },
  { "srs_hashlength",           opt_int,         {&srs_hashlength} },
  { "srs_hashmin",              opt_int,         {&srs_hashmin} },
  { "srs_maxage",               opt_int,         {&srs_maxage} },
  { "srs_secrets",              opt_stringptr,   {&srs_secrets} },
  { "srs_usehash",              opt_bool,        {&srs_usehash} },
  { "srs_usetimestamp",         opt_bool,        {&srs_usetimestamp} },
#endif
  { "strict_acl_vars",          opt_bool,        {&strict_acl_vars} },
  { "strip_excess_angle_brackets", opt_bool,     {&strip_excess_angle_brackets} },
  { "strip_trailing_dot",       opt_bool,        {&strip_trailing_dot} },
  { "syslog_duplication",       opt_bool,        {&syslog_duplication} },
  { "syslog_facility",          opt_stringptr,   {&syslog_facility_str} },
  { "syslog_pid",               opt_bool,        {&syslog_pid} },
  { "syslog_processname",       opt_stringptr,   {&syslog_processname} },
  { "syslog_timestamp",         opt_bool,        {&syslog_timestamp} },
  { "system_filter",            opt_stringptr,   {&system_filter} },
  { "system_filter_directory_transport", opt_stringptr,{&system_filter_directory_transport} },
  { "system_filter_file_transport",opt_stringptr,{&system_filter_file_transport} },
  { "system_filter_group",      opt_gid,         {&system_filter_gid} },
  { "system_filter_pipe_transport",opt_stringptr,{&system_filter_pipe_transport} },
  { "system_filter_reply_transport",opt_stringptr,{&system_filter_reply_transport} },
  { "system_filter_user",       opt_uid,         {&system_filter_uid} },
  { "tcp_nodelay",              opt_bool,        {&tcp_nodelay} },
#ifdef USE_TCP_WRAPPERS
  { "tcp_wrappers_daemon_name", opt_stringptr,   {&tcp_wrappers_daemon_name} },
#endif
  { "timeout_frozen_after",     opt_time,        {&timeout_frozen_after} },
  { "timezone",                 opt_stringptr,   {&timezone_string} },
  { "tls_advertise_hosts",      opt_stringptr,   {&tls_advertise_hosts} },
#ifndef DISABLE_TLS
  { "tls_certificate",          opt_stringptr,   {&tls_certificate} },
  { "tls_crl",                  opt_stringptr,   {&tls_crl} },
  { "tls_dh_max_bits",          opt_int,         {&tls_dh_max_bits} },
  { "tls_dhparam",              opt_stringptr,   {&tls_dhparam} },
  { "tls_eccurve",              opt_stringptr,   {&tls_eccurve} },
# ifndef DISABLE_OCSP
  { "tls_ocsp_file",            opt_stringptr,   {&tls_ocsp_file} },
# endif
  { "tls_on_connect_ports",     opt_stringptr,   {&tls_in.on_connect_ports} },
  { "tls_privatekey",           opt_stringptr,   {&tls_privatekey} },
  { "tls_remember_esmtp",       opt_bool,        {&tls_remember_esmtp} },
  { "tls_require_ciphers",      opt_stringptr,   {&tls_require_ciphers} },
# ifdef EXPERIMENTAL_TLS_RESUME
  { "tls_resumption_hosts",     opt_stringptr,   {&tls_resumption_hosts} },
# endif
  { "tls_try_verify_hosts",     opt_stringptr,   {&tls_try_verify_hosts} },
  { "tls_verify_certificates",  opt_stringptr,   {&tls_verify_certificates} },
  { "tls_verify_hosts",         opt_stringptr,   {&tls_verify_hosts} },
#endif
  { "trusted_groups",           opt_gidlist,     {&trusted_groups} },
  { "trusted_users",            opt_uidlist,     {&trusted_users} },
  { "unknown_login",            opt_stringptr,   {&unknown_login} },
  { "unknown_username",         opt_stringptr,   {&unknown_username} },
  { "untrusted_set_sender",     opt_stringptr,   {&untrusted_set_sender} },
  { "uucp_from_pattern",        opt_stringptr,   {&uucp_from_pattern} },
  { "uucp_from_sender",         opt_stringptr,   {&uucp_from_sender} },
  { "warn_message_file",        opt_stringptr,   {&warn_message_file} },
  { "write_rejectlog",          opt_bool,        {&write_rejectlog} }
};

#ifndef MACRO_PREDEF
static int optionlist_config_size = nelem(optionlist_config);
#endif


#ifdef MACRO_PREDEF

static void
fn_smtp_receive_timeout(const uschar * name, const uschar * str, unsigned flags) {/*Dummy*/}

void
options_main(void)
{
options_from_list(optionlist_config, nelem(optionlist_config), US"MAIN", NULL);
}

void
options_auths(void)
{
uschar buf[EXIM_DRIVERNAME_MAX];

options_from_list(optionlist_auths, optionlist_auths_size, US"AUTHENTICATORS", NULL);

for (struct auth_info * ai = auths_available; ai->driver_name[0]; ai++)
  {
  spf(buf, sizeof(buf), US"_DRIVER_AUTHENTICATOR_%T", ai->driver_name);
  builtin_macro_create(buf);
  options_from_list(ai->options, (unsigned)*ai->options_count, US"AUTHENTICATOR", ai->driver_name);

  if (ai->macros_create) (ai->macros_create)();
  }
}

void
options_logging(void)
{
uschar buf[EXIM_DRIVERNAME_MAX];

for (bit_table * bp = log_options; bp < log_options + log_options_count; bp++)
  {
  spf(buf, sizeof(buf), US"_LOG_%T", bp->name);
  builtin_macro_create(buf);
  }
}


#else	/*!MACRO_PREDEF*/

extern char **environ;

static void save_config_line(const uschar* line);
static void save_config_position(const uschar *file, int line);
static void print_config(BOOL admin, BOOL terse);


#define CSTATE_STACK_SIZE 10

const uschar *config_directory = NULL;


/* Structure for chain (stack) of .included files */

typedef struct config_file_item {
  struct config_file_item *next;
  const uschar *filename;
  const uschar *directory;
  FILE *file;
  int lineno;
} config_file_item;

/* Structure for chain of configuration lines (-bP config) */

typedef struct config_line_item {
  struct config_line_item *next;
  uschar *line;
} config_line_item;

static config_line_item* config_lines;

/* Structure of table of conditional words and their state transitions */

typedef struct cond_item {
  uschar *name;
  int    namelen;
  int    action1;
  int    action2;
  int    pushpop;
} cond_item;

/* Structure of table of syslog facility names and values */

typedef struct syslog_fac_item {
  uschar *name;
  int    value;
} syslog_fac_item;

/* constants */
static const uschar * const hidden = US"<value not displayable>";

/* Static variables */

static config_file_item *config_file_stack = NULL;  /* For includes */

static uschar *syslog_facility_str  = NULL;
static uschar next_section[24];
static uschar time_buffer[24];

/* State variables for conditional loading (.ifdef / .else / .endif) */

static int cstate = 0;
static int cstate_stack_ptr = -1;
static int cstate_stack[CSTATE_STACK_SIZE];

/* Table of state transitions for handling conditional inclusions. There are
four possible state transitions:

  .ifdef true
  .ifdef false
  .elifdef true  (or .else)
  .elifdef false

.endif just causes the previous cstate to be popped off the stack */

static int next_cstate[3][4] =
  {
  /* State 0: reading from file, or reading until next .else or .endif */
  { 0, 1, 2, 2 },
  /* State 1: condition failed, skipping until next .else or .endif */
  { 2, 2, 0, 1 },
  /* State 2: skipping until .endif */
  { 2, 2, 2, 2 },
  };

/* Table of conditionals and the states to set. For each name, there are four
values: the length of the name (to save computing it each time), the state to
set if a macro was found in the line, the state to set if a macro was not found
in the line, and a stack manipulation setting which is:

  -1   pull state value off the stack
   0   don't alter the stack
  +1   push value onto stack, before setting new state
*/

static cond_item cond_list[] = {
  { US"ifdef",    5, 0, 1,  1 },
  { US"ifndef",   6, 1, 0,  1 },
  { US"elifdef",  7, 2, 3,  0 },
  { US"elifndef", 8, 3, 2,  0 },
  { US"else",     4, 2, 2,  0 },
  { US"endif",    5, 0, 0, -1 }
};

static int cond_list_size = sizeof(cond_list)/sizeof(cond_item);

/* Table of syslog facility names and their values */

static syslog_fac_item syslog_list[] = {
  { US"mail",   LOG_MAIL },
  { US"user",   LOG_USER },
  { US"news",   LOG_NEWS },
  { US"uucp",   LOG_UUCP },
  { US"local0", LOG_LOCAL0 },
  { US"local1", LOG_LOCAL1 },
  { US"local2", LOG_LOCAL2 },
  { US"local3", LOG_LOCAL3 },
  { US"local4", LOG_LOCAL4 },
  { US"local5", LOG_LOCAL5 },
  { US"local6", LOG_LOCAL6 },
  { US"local7", LOG_LOCAL7 },
  { US"daemon", LOG_DAEMON }
};

static int syslog_list_size = sizeof(syslog_list)/sizeof(syslog_fac_item);


#define opt_fn_print		BIT(0)
#define opt_fn_print_label	BIT(1)


/*************************************************
*         Find the name of an option             *
*************************************************/

/* This function is to aid debugging. Various functions take arguments that are
pointer variables in the options table or in option tables for various drivers.
For debugging output, it is useful to be able to find the name of the option
which is currently being processed. This function finds it, if it exists, by
searching the table(s).

Arguments:   a value that is presumed to be in the table above
Returns:     the option name, or an empty string
*/

uschar *
readconf_find_option(void *p)
{
for (int i = 0; i < nelem(optionlist_config); i++)
  if (p == optionlist_config[i].v.value) return US optionlist_config[i].name;

for (router_instance * r = routers; r; r = r->next)
  {
  router_info *ri = r->info;
  for (int i = 0; i < *ri->options_count; i++)
    {
    if ((ri->options[i].type & opt_mask) != opt_stringptr) continue;
    if (p == CS (r->options_block) + ri->options[i].v.offset)
      return US ri->options[i].name;
    }
  }

for (transport_instance * t = transports; t; t = t->next)
  {
  transport_info *ti = t->info;
  for (int i = 0; i < *ti->options_count; i++)
    {
    optionlist * op = &ti->options[i];
    if ((op->type & opt_mask) != opt_stringptr) continue;
    if (p == (  op->type & opt_public
	     ? CS t
	     : CS t->options_block
	     )
	     + op->v.offset)
	return US op->name;
    }
  }

return US"";
}




/*************************************************
*       Deal with an assignment to a macro       *
*************************************************/

/* We have a new definition; append to the list.

Args:
 name	Name of the macro; will be copied
 val	Expansion result for the macro; will be copied
*/

macro_item *
macro_create(const uschar * name, const uschar * val, BOOL command_line)
{
macro_item * m = store_get(sizeof(macro_item), FALSE);

READCONF_DEBUG fprintf(stderr, "%s: '%s' '%s'\n", __FUNCTION__, name, val);
m->next = NULL;
m->command_line = command_line;
m->namelen = Ustrlen(name);
m->replen = Ustrlen(val);
m->name = string_copy(name);
m->replacement = string_copy(val);
if (mlast)
  mlast->next = m;
else
  macros = m;
mlast = m;
if (!macros_user)
  macros_user = m;
return m;
}


/* This function is called when a line that starts with an upper case letter is
encountered. The argument "line" should contain a complete logical line, and
start with the first letter of the macro name. The macro name and the
replacement text are extracted and stored. Redefinition of existing,
non-command line, macros is permitted using '==' instead of '='.

Arguments:
  s            points to the start of the logical line

Returns:       FALSE iff fatal error
*/

BOOL
macro_read_assignment(uschar *s)
{
uschar name[EXIM_DRIVERNAME_MAX];
int namelen = 0;
BOOL redef = FALSE;
macro_item *m;

while (isalnum(*s) || *s == '_')
  {
  if (namelen >= sizeof(name) - 1)
    {
    log_write(0, LOG_PANIC|LOG_CONFIG_IN,
      "macro name too long (maximum is " SIZE_T_FMT " characters)", sizeof(name) - 1);
    return FALSE;
    }
  name[namelen++] = *s++;
  }
name[namelen] = 0;

Uskip_whitespace(&s);
if (*s++ != '=')
  {
  log_write(0, LOG_PANIC|LOG_CONFIG_IN, "malformed macro definition");
  return FALSE;
  }

if (*s == '=')
  {
  redef = TRUE;
  s++;
  }
Uskip_whitespace(&s);

/* If an existing macro of the same name was defined on the command line, we
just skip this definition. It's an error to attempt to redefine a macro without
redef set to TRUE, or to redefine a macro when it hasn't been defined earlier.
It is also an error to define a macro whose name begins with the name of a
previously defined macro.  This is the requirement that make using a tree
for macros hard; we must check all macros for the substring.  Perhaps a
sorted list, and a bsearch, would work?
Note: it is documented that the other way round works. */

for (m = macros; m; m = m->next)
  {
  if (Ustrcmp(m->name, name) == 0)
    {
    if (!m->command_line && !redef)
      {
      log_write(0, LOG_CONFIG|LOG_PANIC, "macro \"%s\" is already "
       "defined (use \"==\" if you want to redefine it)", name);
      return FALSE;
      }
    break;
    }

  if (m->namelen < namelen && Ustrstr(name, m->name) != NULL)
    {
    log_write(0, LOG_CONFIG|LOG_PANIC, "\"%s\" cannot be defined as "
      "a macro because previously defined macro \"%s\" is a substring",
      name, m->name);
    return FALSE;
    }

  /* We cannot have this test, because it is documented that a substring
  macro is permitted (there is even an example).
  *
  * if (m->namelen > namelen && Ustrstr(m->name, name) != NULL)
  *   log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
  *     "a macro because it is a substring of previously defined macro \"%s\"",
  *     name, m->name);
  */
  }

/* Check for an overriding command-line definition. */

if (m && m->command_line) return TRUE;

/* Redefinition must refer to an existing macro. */

if (redef)
  if (m)
    {
    m->replen = Ustrlen(s);
    m->replacement = string_copy(s);
    }
  else
    {
    log_write(0, LOG_CONFIG|LOG_PANIC, "can't redefine an undefined macro "
      "\"%s\"", name);
    return FALSE;
    }

/* We have a new definition. */
else
  (void) macro_create(name, s, FALSE);
return TRUE;
}





/* Process line for macros. The line is in big_buffer starting at offset len.
Expand big_buffer if needed.  Handle definitions of new macros, and
macro expansions, rewriting the line in the buffer.

Arguments:
 len		Offset in buffer of start of line
 newlen		Pointer to offset of end of line, updated on return
 macro_found	Pointer to return that a macro was expanded

Return: pointer to first nonblank char in line
*/

uschar *
macros_expand(int len, int * newlen, BOOL * macro_found)
{
uschar * ss = big_buffer + len;
uschar * s;

/* Find the true start of the physical line - leading spaces are always
ignored. */

Uskip_whitespace(&ss);

/* Process the physical line for macros. If this is the start of the logical
line, skip over initial text at the start of the line if it starts with an
upper case character followed by a sequence of name characters and an equals
sign, because that is the definition of a new macro, and we don't do
replacement therein. */

s = ss;
if (len == 0 && isupper(*s))
  {
  while (isalnum(*s) || *s == '_') s++;
  if (Uskip_whitespace(&s) != '=') s = ss;          /* Not a macro definition */
  }

/* Skip leading chars which cannot start a macro name, to avoid multiple
pointless rescans in Ustrstr calls. */

while (*s && !isupper(*s) && !(*s == '_' && isupper(s[1]))) s++;

/* For each defined macro, scan the line (from after XXX= if present),
replacing all occurrences of the macro. */

*macro_found = FALSE;
if (*s) for (macro_item * m = *s == '_' ? macros : macros_user; m; m = m->next)
  {
  uschar * p, *pp;
  uschar * t;

  while (*s && !isupper(*s) && !(*s == '_' && isupper(s[1]))) s++;
  if (!*s) break;

  t = s;
  while ((p = Ustrstr(t, m->name)) != NULL)
    {
    int moveby;

    READCONF_DEBUG fprintf(stderr, "%s: matched '%s' in '%.*s'\n", __FUNCTION__,
      m->name, (int) Ustrlen(ss)-1, ss);
    /* Expand the buffer if necessary */

    while (*newlen - m->namelen + m->replen + 1 > big_buffer_size)
      {
      int newsize = big_buffer_size + BIG_BUFFER_SIZE;
      uschar *newbuffer = store_malloc(newsize);
      memcpy(newbuffer, big_buffer, *newlen + 1);
      p = newbuffer  + (p - big_buffer);
      s = newbuffer  + (s - big_buffer);
      ss = newbuffer + (ss - big_buffer);
      t = newbuffer  + (t - big_buffer);
      big_buffer_size = newsize;
      store_free(big_buffer);
      big_buffer = newbuffer;
      }

    /* Shuffle the remaining characters up or down in the buffer before
    copying in the replacement text. Don't rescan the replacement for this
    same macro. */

    pp = p + m->namelen;
    if ((moveby = m->replen - m->namelen) != 0)
      {
      memmove(p + m->replen, pp, (big_buffer + *newlen) - pp + 1);
      *newlen += moveby;
      }
    Ustrncpy(p, m->replacement, m->replen);
    t = p + m->replen;
    while (*t && !isupper(*t) && !(*t == '_' && isupper(t[1]))) t++;
    *macro_found = TRUE;
    }
  }

/* An empty macro replacement at the start of a line could mean that ss no
longer points to the first non-blank character. */

Uskip_whitespace(&ss);
return ss;
}

/*************************************************
*            Read configuration line             *
*************************************************/

/* A logical line of text is read from the configuration file into the big
buffer, taking account of macros, .includes, and continuations. The size of
big_buffer is increased if necessary. The count of configuration lines is
maintained. Physical input lines starting with # (ignoring leading white space,
and after macro replacement) and empty logical lines are always ignored.
Leading and trailing spaces are removed.

If we hit a line of the form "begin xxxx", the xxxx is placed in the
next_section vector, and the function returns NULL, indicating the end of a
configuration section. On end-of-file, NULL is returned with next_section
empty.

Arguments:      none

Returns:        a pointer to the first non-blank in the line,
                or NULL if eof or end of section is reached
*/

static uschar *
get_config_line(void)
{
int startoffset = 0;         /* To first non-blank char in logical line */
int len = 0;                 /* Of logical line so far */
int newlen;
uschar *s, *ss;
BOOL macro_found;

/* Loop for handling continuation lines, skipping comments, and dealing with
.include files. */

for (;;)
  {
  if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL)
    {
    if (config_file_stack != NULL)    /* EOF inside .include */
      {
      (void)fclose(config_file);
      config_file = config_file_stack->file;
      config_filename = config_file_stack->filename;
      config_directory = config_file_stack->directory;
      config_lineno = config_file_stack->lineno;
      config_file_stack = config_file_stack->next;
      if (config_lines)
        save_config_position(config_filename, config_lineno);
      continue;
      }

    /* EOF at top level */

    if (cstate_stack_ptr >= 0)
      log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
        "Unexpected end of configuration file: .endif missing");

    if (len != 0) break;        /* EOF after continuation */
    next_section[0] = 0;        /* EOF at start of logical line */
    return NULL;
    }

  config_lineno++;
  newlen = len + Ustrlen(big_buffer + len);

  if (config_lines && config_lineno == 1)
    save_config_position(config_filename, config_lineno);

  /* Handle pathologically long physical lines - yes, it did happen - by
  extending big_buffer at this point. The code also copes with very long
  logical lines. */

  while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n')
    {
    uschar *newbuffer;
    big_buffer_size += BIG_BUFFER_SIZE;
    newbuffer = store_malloc(big_buffer_size);

    /* This use of strcpy is OK because we know that the string in the old
    buffer is shorter than the new buffer. */

    Ustrcpy(newbuffer, big_buffer);
    store_free(big_buffer);
    big_buffer = newbuffer;
    if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL)
      break;
    newlen += Ustrlen(big_buffer + newlen);
    }

  ss = macros_expand(len, &newlen, &macro_found);

  /* Check for comment lines - these are physical lines. */

  if (*ss == '#') continue;

  /* Handle conditionals, which are also applied to physical lines. Conditions
  are of the form ".ifdef ANYTEXT" and are treated as true if any macro
  expansion occurred on the rest of the line. A preliminary test for the leading
  '.' saves effort on most lines. */

  if (*ss == '.')
    {
    int i;

    /* Search the list of conditional directives */

    for (i = 0; i < cond_list_size; i++)
      {
      int n;
      cond_item *c = cond_list+i;
      if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue;

      /* The following character must be white space or end of string */

      n = ss[1 + c->namelen];
      if (n != ' ' && n != 't' && n != '\n' && n != 0) break;

      /* .ifdef and .ifndef push the current state onto the stack, then set
      a new one from the table. Stack overflow is an error */

      if (c->pushpop > 0)
        {
        if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1)
          log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
            ".%s nested too deeply", c->name);
        cstate_stack[++cstate_stack_ptr] = cstate;
        cstate = next_cstate[cstate][macro_found? c->action1 : c->action2];
        }

      /* For any of the others, stack underflow is an error. The next state
      comes either from the stack (.endif) or from the table. */

      else
        {
        if (cstate_stack_ptr < 0)
          log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
            ".%s without matching .ifdef", c->name);
        cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] :
          next_cstate[cstate][macro_found? c->action1 : c->action2];
        }

      /* Having dealt with a directive, break the loop */

      break;
      }

    /* If we have handled a conditional directive, continue with the next
    physical line. Otherwise, fall through. */

    if (i < cond_list_size) continue;
    }

  /* If the conditional state is not 0 (actively using these lines), ignore
  this input line. */

  if (cstate != 0) continue;  /* Conditional skip */

  /* Handle .include lines - these are also physical lines. */

  if (Ustrncmp(ss, ".include", 8) == 0 &&
       (isspace(ss[8]) ||
         (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18]))))
    {
    uschar *t;
    int include_if_exists = isspace(ss[8])? 0 : 10;
    config_file_item *save;
    struct stat statbuf;

    ss += 9 + include_if_exists;
    Uskip_whitespace(&ss);
    t = ss + Ustrlen(ss);
    while (t > ss && isspace(t[-1])) t--;
    if (*ss == '\"' && t[-1] == '\"')
      {
      ss++;
      t--;
      }
    *t = 0;

    /* We allow relative file names. For security reasons currently
    relative names not allowed with .include_if_exists. For .include_if_exists
    we need to check the permissions/ownership of the containing folder */
    if (*ss != '/')
      if (include_if_exists) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, ".include specifies a non-"
          "absolute path \"%s\"", ss);
      else
        {
	gstring * g = string_append(NULL, 3, config_directory, "/", ss);
	ss = string_from_gstring(g);
        }

    if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue;

    if (config_lines)
      save_config_position(config_filename, config_lineno);
    save = store_get(sizeof(config_file_item), FALSE);
    save->next = config_file_stack;
    config_file_stack = save;
    save->file = config_file;
    save->filename = config_filename;
    save->directory = config_directory;
    save->lineno = config_lineno;

    if (!(config_file = Ufopen(ss, "rb")))
      log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
        "configuration file %s", ss);

    config_filename = string_copy(ss);
    config_directory = string_copyn(ss, CUstrrchr(ss, '/') - ss);
    config_lineno = 0;
    continue;
    }

  /* If this is the start of the logical line, remember where the non-blank
  data starts. Otherwise shuffle down continuation lines to remove leading
  white space. */

  if (len == 0)
    startoffset = ss - big_buffer;
  else
    {
    s = big_buffer + len;
    if (ss > s)
      {
      memmove(s, ss, (newlen - len) -  (ss - s) + 1);
      newlen -= ss - s;
      }
    }

  /* Accept the new addition to the line. Remove trailing white space. */

  len = newlen;
  while (len > 0 && isspace(big_buffer[len-1])) len--;
  big_buffer[len] = 0;

  /* We are done if the line does not end in backslash and contains some data.
  Empty logical lines are ignored. For continuations, remove the backslash and
  go round the loop to read the continuation line. */

  if (len > 0)
    {
    if (big_buffer[len-1] != '\\') break;   /* End of logical line */
    big_buffer[--len] = 0;                  /* Remove backslash */
    }
  }     /* Loop for reading multiple physical lines */

/* We now have a logical line. Test for the end of a configuration section (or,
more accurately, for the start of the next section). Place the name of the next
section in next_section, and return NULL. If the name given is longer than
next_section, truncate it. It will be unrecognized later, because all the known
section names do fit. Leave space for pluralizing. */

s = big_buffer + startoffset;            /* First non-space character */

if (config_lines)
  save_config_line(s);

if (strncmpic(s, US"begin ", 6) == 0)
  {
  s += 6;
  Uskip_whitespace(&s);
  if (big_buffer + len - s > sizeof(next_section) - 2)
    s[sizeof(next_section) - 2] = 0;
  Ustrcpy(next_section, s);
  return NULL;
  }

/* Return the first non-blank character. */

return s;
}



/*************************************************
*             Read a name                        *
*************************************************/

/* The yield is the pointer to the next uschar. Names longer than the
output space are silently truncated. This function is also used from acl.c when
parsing ACLs.

Arguments:
  name      where to put the name
  len       length of name
  s         input pointer

Returns:    new input pointer
*/

uschar *
readconf_readname(uschar *name, int len, uschar *s)
{
int p = 0;
BOOL broken = FALSE;

if (isalpha(Uskip_whitespace(&s)))
  while (isalnum(*s) || *s == '_')
    {
    if (p < len-1) name[p++] = *s;
    else {
      broken = TRUE;
      break;
    }
    s++;
    }

name[p] = 0;
if (broken) {
  log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
            "exim item name too long (>%d), unable to use \"%s\" (truncated)",
            len, name);
}
Uskip_whitespace(&s);
return s;
}




/*************************************************
*          Read a time value                     *
*************************************************/

/* This function is also called from outside, to read argument
time values. The format of a time value is:

  [<n>w][<n>d][<n>h][<n>m][<n>s]

as long as at least one is present. If a format error is encountered,
return a negative value. The value must be terminated by the given
terminator.

Arguments:
  s             input pointer
  terminator    required terminating character
  return_msec   if TRUE, allow fractional seconds and return milliseconds

Returns:        the time value, or -1 on syntax error
                value is seconds if return_msec is FALSE
                value is milliseconds if return_msec is TRUE
*/

int
readconf_readtime(const uschar *s, int terminator, BOOL return_msec)
{
int yield = 0;
for (;;)
  {
  int value, count;
  double fraction;

  if (!isdigit(*s)) return -1;
  (void)sscanf(CCS s, "%d%n", &value, &count);
  s += count;

  switch (*s)
    {
    case 'w': value *= 7;
    case 'd': value *= 24;
    case 'h': value *= 60;
    case 'm': value *= 60;
    case 's': s++;
    break;

    case '.':
    if (!return_msec) return -1;
    (void)sscanf(CCS s, "%lf%n", &fraction, &count);
    s += count;
    if (*s++ != 's') return -1;
    yield += (int)(fraction * 1000.0);
    break;

    default: return -1;
    }

  if (return_msec) value *= 1000;
  yield += value;
  if (*s == terminator) return yield;
  }
/* Control never reaches here. */
}



/*************************************************
*          Read a fixed point value              *
*************************************************/

/* The value is returned *1000

Arguments:
  s           input pointer
  terminator  required terminator

Returns:      the value, or -1 on error
*/

static int
readconf_readfixed(const uschar *s, int terminator)
{
int yield = 0;
int value, count;
if (!isdigit(*s)) return -1;
(void)sscanf(CS  s, "%d%n", &value, &count);
s += count;
yield = value * 1000;
if (*s == '.')
  {
  int m = 100;
  while (isdigit((*(++s))))
    {
    yield += (*s - '0') * m;
    m /= 10;
    }
  }

return (*s == terminator)? yield : (-1);
}



/*************************************************
*            Find option in list                 *
*************************************************/

/* The lists are always in order, so binary chop can be used.

Arguments:
  name      the option name to search for
  ol        the first entry in the option list
  last      one more than the offset of the last entry in the option list

Returns:    pointer to an option entry, or NULL if not found
*/

static optionlist *
find_option(const uschar *name, optionlist *ol, int last)
{
int first = 0;
while (last > first)
  {
  int middle = (first + last)/2;
  int c = Ustrcmp(name, ol[middle].name);

  if (c == 0) return ol + middle;
  else if (c > 0) first = middle + 1;
  else last = middle;
  }
return NULL;
}



/*************************************************
*      Find a set flag in option list            *
*************************************************/

/* Because some versions of Unix make no restrictions on the values of uids and
gids (even negative ones), we cannot represent "unset" by a special value.
There is therefore a separate boolean variable for each one indicating whether
a value is set or not. This function returns a pointer to the boolean, given
the original option name. It is a major disaster if the flag cannot be found.

Arguments:
  name          the name of the uid or gid option
  oltop         points to the start of the relevant option list
  last          one more than the offset of the last item in the option list
  data_block    NULL when reading main options => data values in the option
                  list are absolute addresses; otherwise they are byte offsets
                  in data_block (used for driver options)

Returns:        a pointer to the boolean flag.
*/

static BOOL *
get_set_flag(const uschar *name, optionlist *oltop, int last, void *data_block)
{
optionlist *ol;
uschar name2[EXIM_DRIVERNAME_MAX];
sprintf(CS name2, "*set_%.50s", name);
if (!(ol = find_option(name2, oltop, last)))
  log_write(0, LOG_MAIN|LOG_PANIC_DIE,
    "Exim internal error: missing set flag for %s", name);
return data_block
  ? (BOOL *)(US data_block + ol->v.offset) : (BOOL *)ol->v.value;
}




/*************************************************
*    Output extra characters message and die     *
*************************************************/

/* Called when an option line has junk on the end. Sometimes this is because
the sysadmin thinks comments are permitted.

Arguments:
  s          points to the extra characters
  t1..t3     strings to insert in the log message

Returns:     doesn't return; dies
*/

static void
extra_chars_error(const uschar *s, const uschar *t1, const uschar *t2, const uschar *t3)
{
uschar *comment = US"";
if (*s == '#') comment = US" (# is comment only at line start)";
log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
  "extra characters follow %s%s%s%s", t1, t2, t3, comment);
}



/*************************************************
*              Read rewrite information          *
*************************************************/

/* Each line of rewrite information contains:

.  A complete address in the form user@domain, possibly with
   leading * for each part; or alternatively, a regex.

.  A replacement string (which will be expanded).

.  An optional sequence of one-letter flags, indicating which
   headers etc. to apply this rule to.

All this is decoded and placed into a control block. The OR of the flags is
maintained in a common word.

Arguments:
  p           points to the string that makes up the rule
  existflags  points to the overall flag word
  isglobal    TRUE if reading global rewrite rules

Returns:      the control block for the parsed rule.
*/

static rewrite_rule *
readconf_one_rewrite(const uschar *p, int *existflags, BOOL isglobal)
{
rewrite_rule *next = store_get(sizeof(rewrite_rule), FALSE);

next->next = NULL;
next->key = string_dequote(&p);

Uskip_whitespace(&p);
if (!*p)
  log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
    "missing rewrite replacement string");

next->flags = 0;
next->replacement = string_dequote(&p);

while (*p) switch (*p++)
  {
  case ' ': case '\t': break;

  case 'q': next->flags |= rewrite_quit; break;
  case 'w': next->flags |= rewrite_whole; break;

  case 'h': next->flags |= rewrite_all_headers; break;
  case 's': next->flags |= rewrite_sender; break;
  case 'f': next->flags |= rewrite_from; break;
  case 't': next->flags |= rewrite_to;   break;
  case 'c': next->flags |= rewrite_cc;   break;
  case 'b': next->flags |= rewrite_bcc;  break;
  case 'r': next->flags |= rewrite_replyto; break;

  case 'E': next->flags |= rewrite_all_envelope; break;
  case 'F': next->flags |= rewrite_envfrom; break;
  case 'T': next->flags |= rewrite_envto; break;

  case 'Q': next->flags |= rewrite_qualify; break;
  case 'R': next->flags |= rewrite_repeat; break;

  case 'S':
  next->flags |= rewrite_smtp;
  if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
    log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
      "rewrite rule has the S flag but is not a regular expression");
  break;

  default:
  log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
    "unknown rewrite flag character '%c' "
    "(could be missing quotes round replacement item)", p[-1]);
  break;
  }

/* If no action flags are set, set all the "normal" rewrites. */

if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
  next->flags |= isglobal? rewrite_all : rewrite_all_headers;

/* Remember which exist, for optimization, and return the rule */

*existflags |= next->flags;
return next;
}




/*************************************************
*          Read global rewrite information       *
*************************************************/

/* Each line is a single rewrite rule; it is parsed into a control block
by readconf_one_rewrite(), and its flags are ORed into the global flag
word rewrite_existflags. */

void
readconf_rewrites(void)
{
rewrite_rule **chain = &global_rewrite_rules;
uschar *p;

while ((p = get_config_line()) != NULL)
  {
  rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
  *chain = next;
  chain = &(next->next);
  }
}



/*************************************************
*               Read a string                    *
*************************************************/

/* Strings are read into the normal store pool. As long we aren't too
near the end of the current block, the string will just use what is necessary
on the top of the stacking pool, because string_cat() uses the extension
mechanism.

Argument:
  s         the rest of the input line
  name      the option name (for errors)

Returns:    pointer to the string
*/

static uschar *
read_string(const uschar *s, const uschar *name)
{
uschar *yield;
const uschar *ss;

if (*s != '\"') return string_copy(s);

ss = s;
yield = string_dequote(&s);

if (s == ss+1 || s[-1] != '\"')
  log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
    "missing quote at end of string value for %s", name);

if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");

return yield;
}


/*************************************************
*            Custom-handler options              *
*************************************************/
static void
fn_smtp_receive_timeout(const uschar * name, const uschar * str, unsigned flags)
{
if (flags & opt_fn_print)
  {
  if (flags & opt_fn_print_label) printf("%s = ", name);
  printf("%s\n", smtp_receive_timeout_s
    ? string_printing2(smtp_receive_timeout_s, SP_TAB)
    : readconf_printtime(smtp_receive_timeout));
  }
else if (*str == '$')
  smtp_receive_timeout_s = string_copy(str);
else
  {
  /* "smtp_receive_timeout",     opt_time,        &smtp_receive_timeout */
  smtp_receive_timeout = readconf_readtime(str, 0, FALSE);
  if (smtp_receive_timeout < 0)
    log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
      name);
  }
}

/*************************************************
*            Handle option line                  *
*************************************************/

/* This function is called from several places to process a line containing the
setting of an option. The first argument is the line to be decoded; it has been
checked not to be empty and not to start with '#'. Trailing newlines and white
space have been removed. The second argument is a pointer to the list of
variable names that are to be recognized, together with their types and
locations, and the third argument gives the number of entries in the list.

The fourth argument is a pointer to a data block. If it is NULL, then the data
values in the options list are absolute addresses. Otherwise, they are byte
offsets in the data block.

String option data may continue onto several lines; this function reads further
data from config_file if necessary.

The yield of this function is normally zero. If a string continues onto
multiple lines, then the data value is permitted to be followed by a comma
or a semicolon (for use in drivers) and the yield is that character.

Arguments:
  buffer        contains the configuration line to be handled
  oltop         points to the start of the relevant option list
  last          one more than the offset of the last item in the option list
  data_block    NULL when reading main options => data values in the option
                  list are absolute addresses; otherwise they are byte offsets
                  in data_block when they have opt_public set; otherwise
                  they are byte offsets in data_block->options_block.
  unknown_txt   format string to use in panic message for unknown option;
                  must contain %s for option name
                if given as NULL, don't panic on unknown option

Returns:        TRUE if an option was read successfully,
                FALSE false for an unknown option if unknown_txt == NULL,
                  otherwise panic and die on an unknown option
*/

static BOOL
readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
  void *data_block, uschar *unknown_txt)
{
int ptr = 0;
int offset = 0;
int count, type, value;
int issecure = 0;
uid_t uid;
gid_t gid;
BOOL boolvalue = TRUE;
BOOL freesptr = TRUE;
optionlist *ol, *ol2;
struct passwd *pw;
rmark reset_point;
int intbase = 0;
uschar *inttype = US"";
uschar *sptr;
uschar *s = buffer;
uschar **str_target;
uschar name[EXIM_DRIVERNAME_MAX];
uschar name2[EXIM_DRIVERNAME_MAX];

/* There may be leading spaces; thereafter, we expect an option name starting
with a letter. */

while (isspace(*s)) s++;
if (!isalpha(*s))
  log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);

/* Read the name of the option, and skip any subsequent white space. If
it turns out that what we read was "hide", set the flag indicating that
this is a secure option, and loop to read the next word. */

for (int n = 0; n < 2; n++)
  {
  while (isalnum(*s) || *s == '_')
    {
    if (ptr < sizeof(name)-1) name[ptr++] = *s;
    s++;
    }
  name[ptr] = 0;
  while (isspace(*s)) s++;
  if (Ustrcmp(name, "hide") != 0) break;
  issecure = opt_secure;
  ptr = 0;
  }

/* Deal with "no_" or "not_" here for booleans */

if (Ustrncmp(name, "no_", 3) == 0)
  {
  boolvalue = FALSE;
  offset = 3;
  }

if (Ustrncmp(name, "not_", 4) == 0)
  {
  boolvalue = FALSE;
  offset = 4;
  }

/* Search the list for the given name. A non-existent name, or an option that
is set twice, is a disaster. */

if (!(ol = find_option(name + offset, oltop, last)))
  {
  if (!unknown_txt) return FALSE;
  log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
  }

if ((ol->type & opt_set)  && !(ol->type & (opt_rep_con | opt_rep_str)))
  log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
    "\"%s\" option set for the second time", name);

ol->type |= opt_set | issecure;
type = ol->type & opt_mask;

/* Types with data values must be followed by '='; the "no[t]_" prefix
applies only to boolean values. */

if (type < opt_bool || type > opt_bool_last)
  {
  if (offset != 0)
    log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
      "negation prefix applied to a non-boolean option");
  if (!*s)
    log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
      "unexpected end of line (data missing) after %s", name);
  if (*s != '=')
    log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
  }

/* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
true/false/yes/no, or, in the case of opt_expand_bool, a general string that
ultimately expands to one of those values. */

else if (*s && (offset != 0 || *s != '='))
  extra_chars_error(s, US"boolean option ", name, US"");

/* Skip white space after = */

if (*s == '=') while (isspace((*(++s))));

/* If there is a data block and the opt_public flag is not set, change
the data block pointer to the private options block. */

if (data_block && !(ol->type & opt_public))
  data_block = (void *)(((driver_instance *)data_block)->options_block);

/* Now get the data according to the type. */

switch (type)
  {
  /* If a string value is not enclosed in quotes, it consists of
  the rest of the current line, verbatim. Otherwise, string escapes
  are processed.

  A transport is specified as a string, which is then looked up in the
  list of transports. A search type is specified as one of a number of
  known strings.

  A set or rewrite rules for a driver is specified as a string, which is
  then parsed into a suitable chain of control blocks.

  Uids and gids are specified as strings which are then looked up in the
  passwd file. Lists of uids and gids are similarly specified as colon-
  separated strings. */

  case opt_stringptr:
  case opt_uid:
  case opt_gid:
  case opt_expand_uid:
  case opt_expand_gid:
  case opt_uidlist:
  case opt_gidlist:
  case opt_rewrite:

  reset_point = store_mark();
  sptr = read_string(s, name);

  /* Having read a string, we now have several different ways of using it,
  depending on the data type, so do another switch. If keeping the actual
  string is not required (because it is interpreted), freesptr is set TRUE,
  and at the end we reset the pool. */

  switch (type)
    {
    /* If this was a string, set the variable to point to the new string,
    and set the flag so its store isn't reclaimed. If it was a list of rewrite
    rules, we still keep the string (for printing), and parse the rules into a
    control block and flags word. */

    case opt_stringptr:
    str_target = data_block ? USS (US data_block + ol->v.offset)
			    : USS ol->v.value;
    if (ol->type & opt_rep_con)
      {
      uschar * saved_condition;
      /* We already have a condition, we're conducting a crude hack to let
      multiple condition rules be chained together, despite storing them in
      text form. */
      *str_target = string_copy_perm( (saved_condition = *str_target)
	? string_sprintf("${if and{{bool_lax{%s}}{bool_lax{%s}}}}",
	    saved_condition, sptr)
	: sptr,
	FALSE);
      /* TODO(pdp): there is a memory leak here and just below
      when we set 3 or more conditions; I still don't
      understand the store mechanism enough to know
      what's the safe way to free content from an earlier store.
      AFAICT, stores stack, so freeing an early stored item also stores
      all data alloc'd after it.  If we knew conditions were adjacent,
      we could survive that, but we don't.  So I *think* we need to take
      another bit from opt_type to indicate "malloced"; this seems like
      quite a hack, especially for this one case.  It also means that
      we can't ever reclaim the store from the *first* condition.

      Because we only do this once, near process start-up, I'm prepared to
      let this slide for the time being, even though it rankles.  */
      }
    else if (ol->type & opt_rep_str)
      {
      uschar sep_o =
	Ustrncmp(name, "headers_add", 11) == 0	? '\n'
	: Ustrncmp(name, "set", 3) == 0		? ';'
	: ':';
      int    sep_i = -(int)sep_o;
      const uschar * list = sptr;
      uschar * s;
      gstring * list_o = NULL;

      if (*str_target)
	{
	list_o = string_get(Ustrlen(*str_target) + Ustrlen(sptr));
	list_o = string_cat(list_o, *str_target);
	}

      while ((s = string_nextinlist(&list, &sep_i, NULL, 0)))
	list_o = string_append_listele(list_o, sep_o, s);

      if (list_o)
	*str_target = string_copy_perm(string_from_gstring(list_o), FALSE);
      }
    else
      {
      *str_target = sptr;
      freesptr = FALSE;
      }
    break;

    case opt_rewrite:
    if (data_block)
      *USS (US data_block + ol->v.offset) = sptr;
    else
      *USS ol->v.value = sptr;
    freesptr = FALSE;
    if (type == opt_rewrite)
      {
      int sep = 0;
      int *flagptr;
      uschar *p = sptr;
      rewrite_rule **chain;
      optionlist *ol3;

      sprintf(CS name2, "*%.50s_rules", name);
      ol2 = find_option(name2, oltop, last);
      sprintf(CS name2, "*%.50s_flags", name);
      ol3 = find_option(name2, oltop, last);

      if (!ol2 || !ol3)
        log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
          "rewrite rules not available for driver");

      if (data_block)
        {
        chain = (rewrite_rule **)(US data_block + ol2->v.offset);
        flagptr = (int *)(US data_block + ol3->v.offset);
        }
      else
        {
        chain = (rewrite_rule **)ol2->v.value;
        flagptr = (int *)ol3->v.value;
        }

      while ((p = string_nextinlist(CUSS &sptr, &sep, big_buffer, BIG_BUFFER_SIZE)))
        {
        rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
        *chain = next;
        chain = &(next->next);
        }

      if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
        log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
          "non-header rewrite - not allowed at transport time -");
      }
    break;

    /* If it was an expanded uid, see if there is any expansion to be
    done by checking for the presence of a $ character. If there is, save it
    in the corresponding *expand_user option field. Otherwise, fall through
    to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
    of data. */

    case opt_expand_uid:
    sprintf(CS name2, "*expand_%.50s", name);
    if ((ol2 = find_option(name2, oltop, last)))
      {
      uschar *ss = (Ustrchr(sptr, '$') != NULL) ? sptr : NULL;

      if (data_block)
        *(USS(US data_block + ol2->v.offset)) = ss;
      else
        *(USS ol2->v.value) = ss;

      if (ss)
        {
        *(get_set_flag(name, oltop, last, data_block)) = FALSE;
        freesptr = FALSE;
        break;
        }
      }

    /* Look up a fixed uid, and also make use of the corresponding gid
    if a passwd entry is returned and the gid has not been set. */

    case opt_uid:
    if (!route_finduser(sptr, &pw, &uid))
      log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
    if (data_block)
      *(uid_t *)(US data_block + ol->v.offset) = uid;
    else
      *(uid_t *)ol->v.value = uid;

    /* Set the flag indicating a fixed value is set */

    *(get_set_flag(name, oltop, last, data_block)) = TRUE;

    /* Handle matching gid if we have a passwd entry: done by finding the
    same name with terminating "user" changed to "group"; if not found,
    ignore. Also ignore if the value is already set. */

    if (pw == NULL) break;
    Ustrcpy(name+Ustrlen(name)-4, US"group");
    ol2 = find_option(name, oltop, last);
    if (ol2 && ((ol2->type & opt_mask) == opt_gid ||
        (ol2->type & opt_mask) == opt_expand_gid))
      {
      BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
      if (!*set_flag)
        {
        if (data_block)
          *((gid_t *)(US data_block + ol2->v.offset)) = pw->pw_gid;
        else
          *((gid_t *)ol2->v.value) = pw->pw_gid;
        *set_flag = TRUE;
        }
      }
    break;

    /* If it was an expanded gid, see if there is any expansion to be
    done by checking for the presence of a $ character. If there is, save it
    in the corresponding *expand_user option field. Otherwise, fall through
    to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
    of data. */

    case opt_expand_gid:
    sprintf(CS name2, "*expand_%.50s", name);
    if ((ol2 = find_option(name2, oltop, last)))
      {
      uschar *ss = (Ustrchr(sptr, '$') != NULL) ? sptr : NULL;

      if (data_block)
        *(USS(US data_block + ol2->v.offset)) = ss;
      else
        *(USS ol2->v.value) = ss;

      if (ss)
        {
        *(get_set_flag(name, oltop, last, data_block)) = FALSE;
        freesptr = FALSE;
        break;
        }
      }

    /* Handle freestanding gid */

    case opt_gid:
    if (!route_findgroup(sptr, &gid))
      log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
    if (data_block)
      *((gid_t *)(US data_block + ol->v.offset)) = gid;
    else
      *((gid_t *)ol->v.value) = gid;
    *(get_set_flag(name, oltop, last, data_block)) = TRUE;
    break;

    /* If it was a uid list, look up each individual entry, and build
    a vector of uids, with a count in the first element. Put the vector
    in malloc store so we can free the string. (We are reading into
    permanent store already.) */

    case opt_uidlist:
      {
      int count = 1;
      uid_t *list;
      int ptr = 0;
      const uschar *p;
      const uschar *op = expand_string (sptr);

      if (op == NULL)
        log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
          name, expand_string_message);

      p = op;
      if (*p != 0) count++;
      while (*p != 0) if (*p++ == ':' && *p != 0) count++;
      list = store_malloc(count*sizeof(uid_t));
      list[ptr++] = (uid_t)(count - 1);

      if (data_block)
        *((uid_t **)(US data_block + ol->v.offset)) = list;
      else
        *((uid_t **)ol->v.value) = list;

      p = op;
      while (count-- > 1)
        {
        int sep = 0;
        (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
        if (!route_finduser(big_buffer, NULL, &uid))
          log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
            big_buffer);
        list[ptr++] = uid;
        }
      }
    break;

    /* If it was a gid list, look up each individual entry, and build
    a vector of gids, with a count in the first element. Put the vector
    in malloc store so we can free the string. (We are reading into permanent
    store already.) */

    case opt_gidlist:
      {
      int count = 1;
      gid_t *list;
      int ptr = 0;
      const uschar *p;
      const uschar *op = expand_string (sptr);

      if (!op)
        log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
          name, expand_string_message);

      p = op;
      if (*p != 0) count++;
      while (*p != 0) if (*p++ == ':' && *p != 0) count++;
      list = store_malloc(count*sizeof(gid_t));
      list[ptr++] = (gid_t)(count - 1);

      if (data_block)
        *((gid_t **)(US data_block + ol->v.offset)) = list;
      else
        *((gid_t **)ol->v.value) = list;

      p = op;
      while (count-- > 1)
        {
        int sep = 0;
        (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
        if (!route_findgroup(big_buffer, &gid))
          log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
            big_buffer);
        list[ptr++] = gid;
        }
      }
    break;
    }

  /* Release store if the value of the string doesn't need to be kept. */

  if (freesptr) reset_point = store_reset(reset_point);
  break;

  /* Expanded boolean: if no characters follow, or if there are no dollar
  characters, this is a fixed-valued boolean, and we fall through. Otherwise,
  save the string for later expansion in the alternate place. */

  case opt_expand_bool:
  if (*s && Ustrchr(s, '$') != 0)
    {
    sprintf(CS name2, "*expand_%.50s", name);
    if ((ol2 = find_option(name2, oltop, last)))
      {
      reset_point = store_mark();
      sptr = read_string(s, name);
      if (data_block)
        *(USS(US data_block + ol2->v.offset)) = sptr;
      else
        *(USS ol2->v.value) = sptr;
      freesptr = FALSE;
      break;
      }
    }
  /* Fall through */

  /* Boolean: if no characters follow, the value is boolvalue. Otherwise
  look for yes/not/true/false. Some booleans are stored in a single bit in
  a single int. There's a special fudge for verify settings; without a suffix
  they set both xx_sender and xx_recipient. The table points to the sender
  value; search subsequently for the recipient. There's another special case:
  opt_bool_set also notes when a boolean has been set. */

  case opt_bool:
  case opt_bit:
  case opt_bool_verify:
  case opt_bool_set:
  if (*s != 0)
    {
    s = readconf_readname(name2, EXIM_DRIVERNAME_MAX, s);
    if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
      boolvalue = TRUE;
    else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
      boolvalue = FALSE;
    else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
      "\"%s\" is not a valid value for the \"%s\" option", name2, name);
    if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
      US"for boolean option ", name);
    }

  /* Handle single-bit type. */

  if (type == opt_bit)
    {
    int bit = 1 << ((ol->type >> 16) & 31);
    int * ptr = data_block
      ? (int *)(US data_block + ol->v.offset)
      : (int *)ol->v.value;
    if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
    break;
    }

  /* Handle full BOOL types */

  if (data_block)
    *((BOOL *)(US data_block + ol->v.offset)) = boolvalue;
  else
    *((BOOL *)ol->v.value) = boolvalue;

  /* Verify fudge */

  if (type == opt_bool_verify)
    {
    sprintf(CS name2, "%.50s_recipient", name + offset);
    if ((ol2 = find_option(name2, oltop, last)))
      if (data_block)
        *((BOOL *)(US data_block + ol2->v.offset)) = boolvalue;
      else
        *((BOOL *)ol2->v.value) = boolvalue;
    }

  /* Note that opt_bool_set type is set, if there is somewhere to do so */

  else if (type == opt_bool_set)
    {
    sprintf(CS name2, "*set_%.50s", name + offset);
    if ((ol2 = find_option(name2, oltop, last)))
      if (data_block)
        *((BOOL *)(US data_block + ol2->v.offset)) = TRUE;
      else
        *((BOOL *)ol2->v.value) = TRUE;
    }
  break;

  /* Octal integer */

  case opt_octint:
  intbase = 8;
  inttype = US"octal ";

  /*  Integer: a simple(ish) case; allow octal and hex formats, and
  suffixes K, M, G, and T.  The different types affect output, not input. */

  case opt_mkint:
  case opt_int:
    {
    uschar *endptr;
    long int lvalue;

    errno = 0;
    lvalue = strtol(CS s, CSS &endptr, intbase);

    if (endptr == s)
      log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
        inttype, name);

    if (errno != ERANGE && *endptr)
      {
      uschar * mp = US"TtGgMmKk\0";	/* YyZzEePpTtGgMmKk */

      if ((mp = Ustrchr(mp, *endptr)))
	{
	endptr++;
	do
	  {
	  if (lvalue > INT_MAX/1024 || lvalue < INT_MIN/1024)
	    {
	    errno = ERANGE;
	    break;
	    }
	  lvalue *= 1024;
	  }
	while (*(mp += 2));
	}
      }

    if (errno == ERANGE || lvalue > INT_MAX || lvalue < INT_MIN)
      log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
        "absolute value of integer \"%s\" is too large (overflow)", s);

    while (isspace(*endptr)) endptr++;
    if (*endptr)
      extra_chars_error(endptr, inttype, US"integer value for ", name);

    value = (int)lvalue;
    }

  if (data_block)
    *(int *)(US data_block + ol->v.offset) = value;
  else
    *(int *)ol->v.value = value;
  break;

  /*  Integer held in K: again, allow formats and suffixes as above. */

  case opt_Kint:
    {
    uschar *endptr;
    errno = 0;
    int_eximarith_t lvalue = strtol(CS s, CSS &endptr, intbase);

    if (endptr == s)
      log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
        inttype, name);

    if (errno != ERANGE && *endptr)
      {
      uschar * mp = US"ZzEePpTtGgMmKk\0";	/* YyZzEePpTtGgMmKk */

      if ((mp = Ustrchr(mp, *endptr)))
	{
	endptr++;
	while (*(mp += 2))
	  {
	  if (lvalue > EXIM_ARITH_MAX/1024 || lvalue < EXIM_ARITH_MIN/1024)
	    {
	    errno = ERANGE;
	    break;
	    }
	  lvalue *= 1024;
	  }
	}
      else
	lvalue = (lvalue + 512)/1024;
      }

    if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
      "absolute value of integer \"%s\" is too large (overflow)", s);

    while (isspace(*endptr)) endptr++;
    if (*endptr != 0)
      extra_chars_error(endptr, inttype, US"integer value for ", name);

    if (data_block)
      *(int_eximarith_t *)(US data_block + ol->v.offset) = lvalue;
    else
      *(int_eximarith_t *)ol->v.value = lvalue;
    break;
    }

  /*  Fixed-point number: held to 3 decimal places. */

  case opt_fixed:
  if (sscanf(CS s, "%d%n", &value, &count) != 1)
    log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
      "fixed-point number expected for %s", name);

  if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
    "integer \"%s\" is too large (overflow)", s);

  value *= 1000;

  if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
    "integer \"%s\" is too large (overflow)", s);

  /* We get a coverity error here for using count, as it derived
  from the tainted buffer pointed to by s, as parsed by sscanf().
  By the definition of sscanf we must be accessing between start
  and end of s (assuming it is nul-terminated...) so ignore the error.  */
  /* coverity[tainted_data] */
  if (s[count] == '.')
    {
    int d = 100;
    while (isdigit(s[++count]))
      {
      value += (s[count] - '0') * d;
      d /= 10;
      }
    }

  while (isspace(s[count])) count++;

  if (s[count] != 0)
    extra_chars_error(s+count, US"fixed-point value for ", name, US"");

  if (data_block)
    *((int *)(US data_block + ol->v.offset)) = value;
  else
    *((int *)ol->v.value) = value;
  break;

  /* There's a special routine to read time values. */

  case opt_time:
  value = readconf_readtime(s, 0, FALSE);
  if (value < 0)
    log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
      name);
  if (data_block)
    *((int *)(US data_block + ol->v.offset)) = value;
  else
    *((int *)ol->v.value) = value;
  break;

  /* A time list is a list of colon-separated times, with the first
  element holding the size of the list and the second the number of
  entries used. */

  case opt_timelist:
    {
    int count = 0;
    int * list = data_block
      ? (int *)(US data_block + ol->v.offset)
      : (int *)ol->v.value;

    if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
      {
      int terminator = 0;
      uschar *snext = Ustrchr(s, ':');
      if (snext != NULL)
        {
        uschar *ss = snext;
        while (ss > s && isspace(ss[-1])) ss--;
        terminator = *ss;
        }
      value = readconf_readtime(s, terminator, FALSE);
      if (value < 0)
        log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
          name);
      if (count > 1 && value <= list[count])
        log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
          "time value out of order for %s", name);
      list[count+1] = value;
      if (snext == NULL) break;
      s = snext + 1;
      while (isspace(*s)) s++;
      }

    if (count > list[0] - 2)
      log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
        name);
    if (count > 0 && list[2] == 0) count = 0;
    list[1] = count;
    break;
    }

  case opt_func:
    {
    void (*fn)() = ol->v.fn;
    fn(name, s, 0);
    break;
    }
  }

return TRUE;
}



/*************************************************
*               Print a time value               *
*************************************************/

/*
Argument:  a time value in seconds
Returns:   pointer to a fixed buffer containing the time as a string,
           in readconf_readtime() format
*/

uschar *
readconf_printtime(int t)
{
int s, m, h, d, w;
uschar *p = time_buffer;

if (t < 0)
  {
  *p++ = '-';
  t = -t;
  }

s = t % 60;
t /= 60;
m = t % 60;
t /= 60;
h = t % 24;
t /= 24;
d = t % 7;
w = t/7;

if (w > 0) p += sprintf(CS p, "%dw", w);
if (d > 0) p += sprintf(CS p, "%dd", d);
if (h > 0) p += sprintf(CS p, "%dh", h);
if (m > 0) p += sprintf(CS p, "%dm", m);
if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);

return time_buffer;
}



/*************************************************
*      Print an individual option value          *
*************************************************/

/* This is used by the -bP option, so prints to the standard output.
The entire options list is passed in as an argument, because some options come
in pairs - typically uid/gid settings, which can either be explicit numerical
values, or strings to be expanded later. If the numerical value is unset,
search for "*expand_<name>" to see if there is a string equivalent.

Arguments:
  ol             option entry, or NULL for an unknown option
  name           option name
  options_block  NULL for main configuration options; otherwise points to
                   a driver block; if the option doesn't have opt_public
                   set, then options_block->options_block is where the item
                   resides.
  oltop          points to the option list in which ol exists
  last           one more than the offset of the last entry in optop
  no_labels      do not show "foo = " at the start.

Returns:         boolean success
*/

static BOOL
print_ol(optionlist *ol, const uschar *name, void *options_block,
  optionlist *oltop, int last, BOOL no_labels)
{
struct passwd *pw;
struct group *gr;
optionlist *ol2;
void *value;
uid_t *uidlist;
gid_t *gidlist;
uschar *s;
uschar name2[EXIM_DRIVERNAME_MAX];

if (!ol)
  {
  printf("%s is not a known option\n", name);
  return FALSE;
  }

/* Non-admin callers cannot see options that have been flagged secure by the
"hide" prefix. */

if (!f.admin_user && ol->type & opt_secure)
  {
  if (no_labels)
    printf("%s\n", CCS hidden);
  else
    printf("%s = %s\n", name, CCS hidden);
  return TRUE;
  }

/* Else show the value of the option */

value = ol->v.value;
if (options_block)
  {
  if (!(ol->type & opt_public))
    options_block = (void *)(((driver_instance *)options_block)->options_block);
  value = (void *)(US options_block + (long int)value);
  }

switch(ol->type & opt_mask)
  {
  case opt_stringptr:
  case opt_rewrite:        /* Show the text value */
    s = *(USS value);
    if (!no_labels) printf("%s = ", name);
    printf("%s\n", s ? string_printing2(s, SP_TAB) : US"");
    break;

  case opt_int:
    if (!no_labels) printf("%s = ", name);
    printf("%d\n", *((int *)value));
    break;

  case opt_mkint:
    {
    int x = *((int *)value);
    if (x != 0 && (x & 1023) == 0)
      {
      int c = 'K';
      x >>= 10;
      if ((x & 1023) == 0)
        {
        c = 'M';
        x >>= 10;
        }
      if (!no_labels) printf("%s = ", name);
      printf("%d%c\n", x, c);
      }
    else
      {
      if (!no_labels) printf("%s = ", name);
      printf("%d\n", x);
      }
    }
    break;

  case opt_Kint:
    {
    int_eximarith_t x = *((int_eximarith_t *)value);
    if (!no_labels) printf("%s = ", name);
    if (x == 0) printf("0\n");
    else if ((x & ((1<<30)-1)) == 0) printf(PR_EXIM_ARITH "T\n", x >> 30);
    else if ((x & ((1<<20)-1)) == 0) printf(PR_EXIM_ARITH "G\n", x >> 20);
    else if ((x & ((1<<10)-1)) == 0) printf(PR_EXIM_ARITH "M\n", x >> 10);
    else printf(PR_EXIM_ARITH "K\n", x);
    }
    break;

  case opt_octint:
    if (!no_labels) printf("%s = ", name);
    printf("%#o\n", *((int *)value));
    break;

  /* Can be negative only when "unset", in which case integer */

  case opt_fixed:
    {
    int x = *((int *)value);
    int f = x % 1000;
    int d = 100;
    if (x < 0) printf("%s =\n", name); else
      {
      if (!no_labels) printf("%s = ", name);
      printf("%d.", x/1000);
      do
        {
        printf("%d", f/d);
        f %= d;
        d /= 10;
        }
      while (f != 0);
      printf("\n");
      }
    }
    break;

  /* If the numerical value is unset, try for the string value */

  case opt_expand_uid:
    if (! *get_set_flag(name, oltop, last, options_block))
      {
      sprintf(CS name2, "*expand_%.50s", name);
      if ((ol2 = find_option(name2, oltop, last)))
	{
	if (options_block)
	  s = *USS (US options_block + ol2->v.offset);
	else
	  s = *USS ol2->v.value;
	if (!no_labels) printf("%s = ", name);
	printf("%s\n", s ? string_printing(s) : US"");
	break;
	}
      }

    /* Else fall through */

  case opt_uid:
    if (!no_labels) printf("%s = ", name);
    if (! *get_set_flag(name, oltop, last, options_block))
      printf("\n");
    else
      if ((pw = getpwuid(*((uid_t *)value))))
	printf("%s\n", pw->pw_name);
      else
	printf("%ld\n", (long int)(*((uid_t *)value)));
    break;

  /* If the numerical value is unset, try for the string value */

  case opt_expand_gid:
    if (! *get_set_flag(name, oltop, last, options_block))
      {
      sprintf(CS name2, "*expand_%.50s", name);
      if (  (ol2 = find_option(name2, oltop, last))
	 && (ol2->type & opt_mask) == opt_stringptr)
	{
	if (options_block)
	  s = *USS (US options_block + ol2->v.offset);
	else
	  s = *USS ol2->v.value;
	if (!no_labels) printf("%s = ", name);
	printf("%s\n", s ? string_printing(s) : US"");
	break;
	}
      }

    /* Else fall through */

  case opt_gid:
    if (!no_labels) printf("%s = ", name);
    if (! *get_set_flag(name, oltop, last, options_block))
      printf("\n");
    else
      if ((gr = getgrgid(*((int *)value))))
	printf("%s\n", gr->gr_name);
      else
	 printf("%ld\n", (long int)(*((int *)value)));
    break;

  case opt_uidlist:
    uidlist = *((uid_t **)value);
    if (!no_labels) printf("%s =", name);
    if (uidlist)
      {
      uschar sep = no_labels ? '\0' : ' ';
      for (int i = 1; i <= (int)(uidlist[0]); i++)
	{
	uschar *name = NULL;
	if ((pw = getpwuid(uidlist[i]))) name = US pw->pw_name;
	if (sep != '\0') printf("%c", sep);
	if (name) printf("%s", name);
	else printf("%ld", (long int)(uidlist[i]));
	sep = ':';
	}
      }
    printf("\n");
    break;

  case opt_gidlist:
    gidlist = *((gid_t **)value);
    if (!no_labels) printf("%s =", name);
    if (gidlist)
      {
      uschar sep = no_labels ? '\0' : ' ';
      for (int i = 1; i <= (int)(gidlist[0]); i++)
	{
	uschar *name = NULL;
	if ((gr = getgrgid(gidlist[i]))) name = US gr->gr_name;
	if (sep != '\0') printf("%c", sep);
	if (name) printf("%s", name);
	else printf("%ld", (long int)(gidlist[i]));
	sep = ':';
	}
      }
    printf("\n");
    break;

  case opt_time:
    if (!no_labels) printf("%s = ", name);
    printf("%s\n", readconf_printtime(*((int *)value)));
    break;

  case opt_timelist:
    {
    int *list = (int *)value;
    if (!no_labels) printf("%s = ", name);
    for (int i = 0; i < list[1]; i++)
      printf("%s%s", i == 0 ? "" : ":", readconf_printtime(list[i+2]));
    printf("\n");
    }
    break;

  case opt_bit:
    printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
      "" : "no_", name);
    break;

  case opt_expand_bool:
    sprintf(CS name2, "*expand_%.50s", name);
    if ((ol2 = find_option(name2, oltop, last)) && ol2->v.value)
      {
      if (options_block)
	s = *USS (US options_block + ol2->v.offset);
      else
	s = *USS ol2->v.value;
      if (s)
	{
	if (!no_labels) printf("%s = ", name);
	printf("%s\n", string_printing(s));
	break;
	}
      /* s == NULL => string not set; fall through */
      }

    /* Fall through */

  case opt_bool:
  case opt_bool_verify:
  case opt_bool_set:
    printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
    break;

  case opt_func:
    ol->v.fn(name, NULL, no_labels ? opt_fn_print : opt_fn_print|opt_fn_print_label);
    break;
  }
return TRUE;
}



/*************************************************
*        Print value from main configuration     *
*************************************************/

/* This function, called as a result of encountering the -bP option,
causes the value of any main configuration variable to be output if the
second argument is NULL. There are some special values:

  all                print all main configuration options
  config_file        print the name of the configuration file
                     (configure_file will still work, for backward
                     compatibility)
  routers            print the routers' configurations
  transports         print the transports' configuration
  authenticators     print the authenticators' configuration
  macros             print the macros' configuration
  router_list        print a list of router names
  transport_list     print a list of transport names
  authenticator_list print a list of authentication mechanism names
  macro_list         print a list of macro names
  +name              print a named list item
  local_scan         print the local_scan options
  config             print the configuration as it is parsed
  environment        print the used execution environment

If the second argument is not NULL, it must be one of "router", "transport",
"authenticator" or "macro" in which case the first argument identifies the
driver whose options are to be printed.

Arguments:
  name        option name if type == NULL; else driver name
  type        NULL or driver type name, as described above
  no_labels   avoid the "foo = " at the start of an item

Returns:      Boolean success
*/

BOOL
readconf_print(const uschar *name, uschar *type, BOOL no_labels)
{
BOOL names_only = FALSE;
optionlist *ol2 = NULL;
driver_instance *d = NULL;
int size = 0;

if (!type)
  {
  if (*name == '+')
    {
    tree_node *t;
    BOOL found = FALSE;
    static uschar *types[] = { US"address", US"domain", US"host",
      US"localpart" };
    static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
      &hostlist_anchor, &localpartlist_anchor };

    for (int i = 0; i < 4; i++)
      if ((t = tree_search(*(anchors[i]), name+1)))
        {
	namedlist_block * nb = t->data.ptr;
	const uschar * s = nb->hide ? hidden : nb->string;
        found = TRUE;
        if (no_labels)
          printf("%s\n", CCS s);
        else
          printf("%slist %s = %s\n", types[i], name+1, CCS s);
        }

    if (!found)
      printf("no address, domain, host, or local part list called \"%s\" "
        "exists\n", name+1);

    return found;
    }

  if (  Ustrcmp(name, "configure_file") == 0
     || Ustrcmp(name, "config_file") == 0)
    {
    printf("%s\n", CS config_main_filename);
    return TRUE;
    }

  if (Ustrcmp(name, "all") == 0)
    {
    for (optionlist * ol = optionlist_config;
         ol < optionlist_config + nelem(optionlist_config); ol++)
      if (!(ol->type & opt_hidden))
        (void) print_ol(ol, US ol->name, NULL,
		  optionlist_config, nelem(optionlist_config),
		  no_labels);
    return TRUE;
    }

  if (Ustrcmp(name, "local_scan") == 0)
    {
#ifndef LOCAL_SCAN_HAS_OPTIONS
    printf("local_scan() options are not supported\n");
    return FALSE;
#else
    for (optionlist * ol = local_scan_options;
         ol < local_scan_options + local_scan_options_count; ol++)
      (void) print_ol(ol, US ol->name, NULL, local_scan_options,
		  local_scan_options_count, no_labels);
    return TRUE;
#endif
    }

  if (Ustrcmp(name, "config") == 0)
    {
    print_config(f.admin_user, no_labels);
    return TRUE;
    }

  if (Ustrcmp(name, "routers") == 0)
    {
    type = US"router";
    name = NULL;
    }
  else if (Ustrcmp(name, "transports") == 0)
    {
    type = US"transport";
    name = NULL;
    }
  else if (Ustrcmp(name, "authenticators") == 0)
    {
    type = US"authenticator";
    name = NULL;
    }
  else if (Ustrcmp(name, "macros") == 0)
    {
    type = US"macro";
    name = NULL;
    }
  else if (Ustrcmp(name, "router_list") == 0)
    {
    type = US"router";
    name = NULL;
    names_only = TRUE;
    }
  else if (Ustrcmp(name, "transport_list") == 0)
    {
    type = US"transport";
    name = NULL;
    names_only = TRUE;
    }
  else if (Ustrcmp(name, "authenticator_list") == 0)
    {
    type = US"authenticator";
    name = NULL;
    names_only = TRUE;
    }
  else if (Ustrcmp(name, "macro_list") == 0)
    {
    type = US"macro";
    name = NULL;
    names_only = TRUE;
    }
  else if (Ustrcmp(name, "environment") == 0)
    {
    if (environ)
      {
      uschar ** p;
      for (p = USS environ; *p; p++) ;
      qsort(environ, p - USS environ, sizeof(*p), string_compare_by_pointer);

      for (p = USS environ; *p; p++)
        {
	uschar * q;
        if (no_labels && (q = Ustrchr(*p, '='))) *q  = '\0';
        puts(CS *p);
        }
      }
    return TRUE;
    }

  else
    return print_ol(find_option(name,
		      optionlist_config, nelem(optionlist_config)),
      name, NULL, optionlist_config, nelem(optionlist_config), no_labels);
  }

/* Handle the options for a router or transport. Skip options that are flagged
as hidden. Some of these are options with names starting with '*', used for
internal alternative representations of other options (which the printing
function will sort out). Others are synonyms kept for backward compatibility.
*/

if (Ustrcmp(type, "router") == 0)
  {
  d = (driver_instance *)routers;
  ol2 = optionlist_routers;
  size = optionlist_routers_size;
  }
else if (Ustrcmp(type, "transport") == 0)
  {
  d = (driver_instance *)transports;
  ol2 = optionlist_transports;
  size = optionlist_transports_size;
  }
else if (Ustrcmp(type, "authenticator") == 0)
  {
  d = (driver_instance *)auths;
  ol2 = optionlist_auths;
  size = optionlist_auths_size;
  }

else if (Ustrcmp(type, "macro") == 0)
  {
  /* People store passwords in macros and they were previously not available
  for printing.  So we have an admin_users restriction. */
  if (!f.admin_user)
    {
    fprintf(stderr, "exim: permission denied\n");
    return FALSE;
    }
  for (macro_item * m = macros; m; m = m->next)
    if (!name || Ustrcmp(name, m->name) == 0)
      {
      if (names_only)
        printf("%s\n", CS m->name);
      else if (no_labels)
        printf("%s\n", CS m->replacement);
      else
        printf("%s=%s\n", CS m->name, CS m->replacement);
      if (name)
        return TRUE;
      }
  if (!name) return TRUE;

  printf("%s %s not found\n", type, name);
  return FALSE;
  }

if (names_only)
  {
  for (; d; d = d->next) printf("%s\n", CS d->name);
  return TRUE;
  }

/* Either search for a given driver, or print all of them */

for (; d; d = d->next)
  {
  BOOL rc = FALSE;
  if (!name)
    printf("\n%s %s:\n", d->name, type);
  else if (Ustrcmp(d->name, name) != 0) continue;

  for (optionlist * ol = ol2; ol < ol2 + size; ol++)
    if (!(ol->type & opt_hidden))
      rc |= print_ol(ol, US ol->name, d, ol2, size, no_labels);

  for (optionlist * ol = d->info->options;
       ol < d->info->options + *(d->info->options_count); ol++)
    if (!(ol->type & opt_hidden))
      rc |= print_ol(ol, US ol->name, d, d->info->options,
		    *d->info->options_count, no_labels);

  if (name) return rc;
  }
if (!name) return TRUE;

printf("%s %s not found\n", type, name);
return FALSE;
}



/*************************************************
*          Read a named list item                *
*************************************************/

/* This function reads a name and a list (i.e. string). The name is used to
save the list in a tree, sorted by its name. Each entry also has a number,
which can be used for caching tests, but if the string contains any expansion
items other than $key, the number is set negative to inhibit caching. This
mechanism is used for domain, host, and address lists that are referenced by
the "+name" syntax.

Arguments:
  anchorp     points to the tree anchor
  numberp     points to the current number for this tree
  max         the maximum number permitted
  s           the text of the option line, starting immediately after the name
                of the list type
  tname       the name of the list type, for messages
  hide	      do not output value on "-bP"

Returns:      nothing
*/

static void
read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
  uschar *tname, BOOL hide)
{
BOOL forcecache = FALSE;
uschar *ss;
tree_node *t;
namedlist_block * nb = store_get(sizeof(namedlist_block), FALSE);

if (Ustrncmp(s, "_cache", 6) == 0)
  {
  forcecache = TRUE;
  s += 6;
  }

if (!isspace(*s))
  log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");

if (*numberp >= max)
 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
   tname, max);

Uskip_whitespace(&s);
ss = s;
while (isalnum(*s) || *s == '_') s++;
t = store_get(sizeof(tree_node) + s-ss, is_tainted(ss));
Ustrncpy(t->name, ss, s-ss);
t->name[s-ss] = 0;
Uskip_whitespace(&s);

if (!tree_insertnode(anchorp, t))
  log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
    "duplicate name \"%s\" for a named %s", t->name, tname);

t->data.ptr = nb;
nb->number = *numberp;
*numberp += 1;
nb->hide = hide;

if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
  "missing '=' after \"%s\"", t->name);
Uskip_whitespace(&s);
nb->string = read_string(s, t->name);
nb->cache_data = NULL;

/* Check the string for any expansions; if any are found, mark this list
uncacheable unless the user has explicited forced caching. */

if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
}




/*************************************************
*        Unpick data for a rate limit            *
*************************************************/

/* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
separate values.

Arguments:
  s            string, in the form t,b,f,l
               where t is the threshold (integer)
               b is the initial delay (time)
               f is the multiplicative factor (fixed point)
               k is the maximum time (time)
  threshold    where to store threshold
  base         where to store base in milliseconds
  factor       where to store factor in milliseconds
  limit        where to store limit

Returns:       nothing (panics on error)
*/

static void
unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
  int *limit)
{
uschar bstring[16], lstring[16];

if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
    factor, lstring) == 4)
  {
  *base = readconf_readtime(bstring, 0, TRUE);
  *limit = readconf_readtime(lstring, 0, TRUE);
  if (*base >= 0 && *limit >= 0) return;
  }
log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
}




/*************************************************
*         Read main configuration options        *
*************************************************/

/* This function is the first to be called for configuration reading. It
opens the configuration file and reads general configuration settings until
it reaches the end of the configuration section. The file is then left open so
that the remaining configuration data can subsequently be read if needed for
this run of Exim.

The configuration file must be owned either by root or exim, and be writeable
only by root or uid/gid exim. The values for Exim's uid and gid can be changed
in the config file, so the test is done on the compiled in values. A slight
anomaly, to be carefully documented.

The name of the configuration file is taken from a list that is included in the
binary of Exim. It can be altered from the command line, but if that is done,
root privilege is immediately withdrawn unless the caller is root or exim.
The first file on the list that exists is used.

For use on multiple systems that share file systems, first look for a
configuration file whose name has the current node name on the end. If that is
not found, try the generic name. For really contorted configurations, that run
multiple Exims with different uid settings, first try adding the effective uid
before the node name. These complications are going to waste resources on most
systems. Therefore they are available only when requested by compile-time
options. */

void
readconf_main(BOOL nowarn)
{
int sep = 0;
struct stat statbuf;
uschar *s, *filename;
const uschar *list = config_main_filelist;

/* Loop through the possible file names */

while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size)))
  {

  /* Cut out all the fancy processing unless specifically wanted */

  #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
  uschar *suffix = filename + Ustrlen(filename);

  /* Try for the node-specific file if a node name exists */

  #ifdef CONFIGURE_FILE_USE_NODE
  struct utsname uts;
  if (uname(&uts) >= 0)
    {
    #ifdef CONFIGURE_FILE_USE_EUID
    sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
    config_file = Ufopen(filename, "rb");
    if (config_file == NULL)
    #endif  /* CONFIGURE_FILE_USE_EUID */
      {
      sprintf(CS suffix, ".%.256s", uts.nodename);
      config_file = Ufopen(filename, "rb");
      }
    }
  #endif  /* CONFIGURE_FILE_USE_NODE */

  /* Otherwise, try the generic name, possibly with the euid added */

  #ifdef CONFIGURE_FILE_USE_EUID
  if (config_file == NULL)
    {
    sprintf(CS suffix, ".%ld", (long int)original_euid);
    config_file = Ufopen(filename, "rb");
    }
  #endif  /* CONFIGURE_FILE_USE_EUID */

  /* Finally, try the unadorned name */

  if (config_file == NULL)
    {
    *suffix = 0;
    config_file = Ufopen(filename, "rb");
    }
  #else  /* if neither defined */

  /* This is the common case when the fancy processing is not included. */

  config_file = Ufopen(filename, "rb");
  #endif

  /* If the file does not exist, continue to try any others. For any other
  error, break out (and die). */

  if (config_file != NULL || errno != ENOENT) break;
  }

/* On success, save the name for verification; config_filename is used when
logging configuration errors (it changes for .included files) whereas
config_main_filename is the name shown by -bP. Failure to open a configuration
file is a serious disaster. */

if (config_file)
  {
  uschar *last_slash = Ustrrchr(filename, '/');
  config_filename = config_main_filename = string_copy(filename);

  /* The config_main_directory we need for the $config_dir expansion.
  config_main_filename we need for $config_file expansion.
  And config_dir is the directory of the current configuration, used for
  relative .includes. We do need to know it's name, as we change our working
  directory later. */

  if (filename[0] == '/')
    config_main_directory = last_slash == filename ? US"/" : string_copyn(filename, last_slash - filename);
  else
    {
      /* relative configuration file name: working dir + / + basename(filename) */

      uschar buf[PATH_MAX];
      gstring * g;

      if (os_getcwd(buf, PATH_MAX) == NULL)
        {
        perror("exim: getcwd");
        exit(EXIT_FAILURE);
        }
      g = string_cat(NULL, buf);

      /* If the dir does not end with a "/", append one */
      if (g->s[g->ptr-1] != '/')
        g = string_catn(g, US"/", 1);

      /* If the config file contains a "/", extract the directory part */
      if (last_slash)
        g = string_catn(g, filename, last_slash - filename);

      config_main_directory = string_from_gstring(g);
    }
  config_directory = config_main_directory;
  }
else
  {
  if (filename == NULL)
    log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
      "%s", config_main_filelist);
  else
    log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno,
      "configuration file %s", filename));
  }

/* Now, once we found and opened our configuration file, we change the directory
to a safe place. Later we change to $spool_directory. */

if (Uchdir("/") < 0)
  {
  perror("exim: chdir `/': ");
  exit(EXIT_FAILURE);
  }

/* Check the status of the file we have opened, if we have retained root
privileges and the file isn't /dev/null (which *should* be 0666). */

if (f.trusted_config && Ustrcmp(filename, US"/dev/null"))
  {
  if (fstat(fileno(config_file), &statbuf) != 0)
    log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",
      big_buffer);

  if ((statbuf.st_uid != root_uid                /* owner not root */
       #ifdef CONFIGURE_OWNER
       && statbuf.st_uid != config_uid           /* owner not the special one */
       #endif
         ) ||                                    /* or */
      (statbuf.st_gid != root_gid                /* group not root & */
       #ifdef CONFIGURE_GROUP
       && statbuf.st_gid != config_gid           /* group not the special one */
       #endif
       && (statbuf.st_mode & 020) != 0) ||       /* group writeable  */
                                                 /* or */
      ((statbuf.st_mode & 2) != 0))              /* world writeable  */

    log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the "
      "wrong owner, group, or mode", big_buffer);

  /* Do a dummy store-allocation of a size related to the (toplevel) file size.
  This assumes we will need this much storage to handle all the allocations
  during startup; it won't help when .include is being used.  When it does, it
  will cut down on the number of store blocks (and malloc calls, and sbrk
  syscalls).  It also assume we're on the relevant pool. */

  if (statbuf.st_size > 8192)
    {
    rmark r = store_mark();
    void * dummy = store_get((int)statbuf.st_size, FALSE);
    store_reset(r);
    }
  }

/* Process the main configuration settings. They all begin with a lower case
letter. If we see something starting with an upper case letter, it is taken as
a macro definition. */

while ((s = get_config_line()))
  {
  BOOL hide;
  uschar * t;

  if (config_lineno == 1 && Ustrstr(s, "\xef\xbb\xbf") == s)
    log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
      "found unexpected BOM (Byte Order Mark)");

  if (isupper(*s))
    {
    if (!macro_read_assignment(s)) exim_exit(EXIT_FAILURE);
    continue;
    }

  t = (hide = Ustrncmp(s, "hide", 4) == 0 && isspace(s[4])) ? s + 5 : s;

  if (Ustrncmp(t, "domainlist", 10) == 0)
    read_named_list(&domainlist_anchor, &domainlist_count,
      MAX_NAMED_LIST, t+10, US"domain list", hide);

  else if (Ustrncmp(t, "hostlist", 8) == 0)
    read_named_list(&hostlist_anchor, &hostlist_count,
      MAX_NAMED_LIST, t+8, US"host list", hide);

  else if (Ustrncmp(t, US"addresslist", 11) == 0)
    read_named_list(&addresslist_anchor, &addresslist_count,
      MAX_NAMED_LIST, t+11, US"address list", hide);

  else if (Ustrncmp(t, US"localpartlist", 13) == 0)
    read_named_list(&localpartlist_anchor, &localpartlist_count,
      MAX_NAMED_LIST, t+13, US"local part list", hide);

  else
    (void) readconf_handle_option(s, optionlist_config, optionlist_config_size,
      NULL, US"main option \"%s\" unknown");
  }


/* If local_sender_retain is set, local_from_check must be unset. */

if (local_sender_retain && local_from_check)
  log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and "
    "local_sender_retain are set; this combination is not allowed");

/* If the timezone string is empty, set it to NULL, implying no TZ variable
wanted. */

if (timezone_string != NULL && *timezone_string == 0) timezone_string = NULL;

/* The max retry interval must not be greater than 24 hours. */

if (retry_interval_max > 24*60*60) retry_interval_max = 24*60*60;

/* remote_max_parallel must be > 0 */

if (remote_max_parallel <= 0) remote_max_parallel = 1;

/* Save the configured setting of freeze_tell, so we can re-instate it at the
start of a new SMTP message. */

freeze_tell_config = freeze_tell;

/* The primary host name may be required for expansion of spool_directory
and log_file_path, so make sure it is set asap. It is obtained from uname(),
but if that yields an unqualified value, make a FQDN by using gethostbyname to
canonize it. Some people like upper case letters in their host names, so we
don't force the case. */

if (primary_hostname == NULL)
  {
  const uschar *hostname;
  struct utsname uts;
  if (uname(&uts) < 0)
    log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name");
  hostname = US uts.nodename;

  if (Ustrchr(hostname, '.') == NULL)
    {
    int af = AF_INET;
    struct hostent *hostdata;

    #if HAVE_IPV6
    if (!disable_ipv6 && (dns_ipv4_lookup == NULL ||
         match_isinlist(hostname, CUSS &dns_ipv4_lookup, 0, NULL, NULL,
	    MCL_DOMAIN, TRUE, NULL) != OK))
      af = AF_INET6;
    #else
    af = AF_INET;
    #endif

    for (;;)
      {
      #if HAVE_IPV6
        #if HAVE_GETIPNODEBYNAME
        int error_num;
        hostdata = getipnodebyname(CS hostname, af, 0, &error_num);
        #else
        hostdata = gethostbyname2(CS hostname, af);
        #endif
      #else
      hostdata = gethostbyname(CS hostname);
      #endif

      if (hostdata != NULL)
        {
        hostname = US hostdata->h_name;
        break;
        }

      if (af == AF_INET) break;
      af = AF_INET;
      }
    }

  primary_hostname = string_copy(hostname);
  }

/* Set up default value for smtp_active_hostname */

smtp_active_hostname = primary_hostname;

/* If spool_directory wasn't set in the build-time configuration, it must have
got set above. Of course, writing to the log may not work if log_file_path is
not set, but it will at least get to syslog or somewhere, with any luck. */

if (!*spool_directory)
  log_write(0, LOG_MAIN|LOG_PANIC_DIE, "spool_directory undefined: cannot "
    "proceed");

/* Expand the spool directory name; it may, for example, contain the primary
host name. Same comment about failure. */

if (!(s = expand_string(spool_directory)))
  log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand spool_directory "
    "\"%s\": %s", spool_directory, expand_string_message);
spool_directory = s;

/* Expand log_file_path, which must contain "%s" in any component that isn't
the null string or "syslog". It is also allowed to contain one instance of %D
or %M. However, it must NOT contain % followed by anything else. */

if (*log_file_path)
  {
  const uschar *ss, *sss;
  int sep = ':';                       /* Fixed for log file path */
  if (!(s = expand_string(log_file_path)))
    log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand log_file_path "
      "\"%s\": %s", log_file_path, expand_string_message);

  ss = s;
  while ((sss = string_nextinlist(&ss, &sep, big_buffer, big_buffer_size)))
    {
    uschar *t;
    if (sss[0] == 0 || Ustrcmp(sss, "syslog") == 0) continue;
    if (!(t = Ustrstr(sss, "%s")))
      log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" does not "
        "contain \"%%s\"", sss);
    *t = 'X';
    if ((t = Ustrchr(sss, '%')))
      if ((t[1] != 'D' && t[1] != 'M') || Ustrchr(t+2, '%') != NULL)
        log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" contains "
          "unexpected \"%%\" character", s);
    }

  log_file_path = s;
  }

/* Interpret syslog_facility into an integer argument for 'ident' param to
openlog(). Default is LOG_MAIL set in globals.c. Allow the user to omit the
leading "log_". */

if (syslog_facility_str)
  {
  int i;
  uschar *s = syslog_facility_str;

  if ((Ustrlen(syslog_facility_str) >= 4) &&
        (strncmpic(syslog_facility_str, US"log_", 4) == 0))
    s += 4;

  for (i = 0; i < syslog_list_size; i++)
    if (strcmpic(s, syslog_list[i].name) == 0)
      {
      syslog_facility = syslog_list[i].value;
      break;
      }

  if (i >= syslog_list_size)
    log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
      "failed to interpret syslog_facility \"%s\"", syslog_facility_str);
  }

/* Expand pid_file_path */

if (*pid_file_path != 0)
  {
  if (!(s = expand_string(pid_file_path)))
    log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand pid_file_path "
      "\"%s\": %s", pid_file_path, expand_string_message);
  pid_file_path = s;
  }

/* Set default value of process_log_path */

if (!process_log_path || *process_log_path =='\0')
  process_log_path = string_sprintf("%s/exim-process.info", spool_directory);

/* Compile the regex for matching a UUCP-style "From_" line in an incoming
message. */

regex_From = regex_must_compile(uucp_from_pattern, FALSE, TRUE);

/* Unpick the SMTP rate limiting options, if set */

if (smtp_ratelimit_mail)
  unpick_ratelimit(smtp_ratelimit_mail, &smtp_rlm_threshold,
    &smtp_rlm_base, &smtp_rlm_factor, &smtp_rlm_limit);

if (smtp_ratelimit_rcpt)
  unpick_ratelimit(smtp_ratelimit_rcpt, &smtp_rlr_threshold,
    &smtp_rlr_base, &smtp_rlr_factor, &smtp_rlr_limit);

/* The qualify domains default to the primary host name */

if (!qualify_domain_sender)
  qualify_domain_sender = primary_hostname;
if (!qualify_domain_recipient)
  qualify_domain_recipient = qualify_domain_sender;

/* Setting system_filter_user in the configuration sets the gid as well if a
name is given, but a numerical value does not. */

if (system_filter_uid_set && !system_filter_gid_set)
  {
  struct passwd *pw = getpwuid(system_filter_uid);
  if (!pw)
    log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to look up uid %ld",
      (long int)system_filter_uid);
  system_filter_gid = pw->pw_gid;
  system_filter_gid_set = TRUE;
  }

/* If the errors_reply_to field is set, check that it is syntactically valid
and ensure it contains a domain. */

if (errors_reply_to)
  {
  uschar *errmess;
  int start, end, domain;
  uschar *recipient = parse_extract_address(errors_reply_to, &errmess,
    &start, &end, &domain, FALSE);

  if (!recipient)
    log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
      "error in errors_reply_to (%s): %s", errors_reply_to, errmess);

  if (domain == 0)
    log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
      "errors_reply_to (%s) does not contain a domain", errors_reply_to);
  }

/* If smtp_accept_queue or smtp_accept_max_per_host is set, then
smtp_accept_max must also be set. */

if (smtp_accept_max == 0 &&
    (smtp_accept_queue > 0 || smtp_accept_max_per_host != NULL))
  log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
    "smtp_accept_max must be set if smtp_accept_queue or "
    "smtp_accept_max_per_host is set");

/* Set up the host number if anything is specified. It is an expanded string
so that it can be computed from the host name, for example. We do this last
so as to ensure that everything else is set up before the expansion. */

if (host_number_string)
  {
  long int n;
  uschar *end;
  uschar *s = expand_string(host_number_string);

  if (!s)
    log_write(0, LOG_MAIN|LOG_PANIC_DIE,
        "failed to expand localhost_number \"%s\": %s",
        host_number_string, expand_string_message);
  n = Ustrtol(s, &end, 0);
  while (isspace(*end)) end++;
  if (*end != 0)
    log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
      "localhost_number value is not a number: %s", s);
  if (n > LOCALHOST_MAX)
    log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
      "localhost_number is greater than the maximum allowed value (%d)",
        LOCALHOST_MAX);
  host_number = n;
  }

#ifndef DISABLE_TLS
/* If tls_verify_hosts is set, tls_verify_certificates must also be set */

if ((tls_verify_hosts || tls_try_verify_hosts) && !tls_verify_certificates)
  log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
    "tls_%sverify_hosts is set, but tls_verify_certificates is not set",
    tls_verify_hosts ? "" : "try_");

/* Magic number: at time of writing, 1024 has been the long-standing value
used by so many clients, and what Exim used to use always, that it makes
sense to just min-clamp this max-clamp at that. */
if (tls_dh_max_bits < 1024)
  log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
      "tls_dh_max_bits is too small, must be at least 1024 for interop");

/* If openssl_options is set, validate it */
if (openssl_options)
  {
# ifdef USE_GNUTLS
  log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
    "openssl_options is set but we're using GnuTLS");
# else
  long dummy;
  if (!tls_openssl_options_parse(openssl_options, &dummy))
    log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
      "openssl_options parse error: %s", openssl_options);
# endif
  }
#endif	/*DISABLE_TLS*/

if (!nowarn && !keep_environment && environ && *environ)
  log_write(0, LOG_MAIN,
      "Warning: purging the environment.\n"
      " Suggested action: use keep_environment.");
}



/*************************************************
*          Initialize one driver                 *
*************************************************/

/* This is called once the driver's generic options, if any, have been read.
We can now find the driver, set up defaults for the private options, and
unset any "set" bits in the private options table (which might have been
set by another incarnation of the same driver).

Arguments:
  d                   pointer to driver instance block, with generic
                        options filled in
  drivers_available   vector of available drivers
  size_of_info        size of each block in drivers_available
  class               class of driver, for error message

Returns:              pointer to the driver info block
*/

static driver_info *
init_driver(driver_instance *d, driver_info *drivers_available,
  int size_of_info, uschar *class)
{
for (driver_info * dd = drivers_available; dd->driver_name[0] != 0;
     dd = (driver_info *)((US dd) + size_of_info))
  if (Ustrcmp(d->driver_name, dd->driver_name) == 0)
    {
    int len = dd->options_len;
    d->info = dd;
    d->options_block = store_get(len, FALSE);
    memcpy(d->options_block, dd->options_block, len);
    for (int i = 0; i < *(dd->options_count); i++)
      dd->options[i].type &= ~opt_set;
    return dd;
    }

log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
  "%s %s: cannot find %s driver \"%s\"", class, d->name, class, d->driver_name);

return NULL;   /* never obeyed */
}




/*************************************************
*             Initialize driver list             *
*************************************************/

/* This function is called for routers, transports, and authentication
mechanisms. It reads the data from the current point in the configuration file
up to the end of the section, and sets up a chain of instance blocks according
to the file's contents. The file will already have been opened by a call to
readconf_main, and must be left open for subsequent reading of further data.

Any errors cause a panic crash. Note that the blocks with names driver_info and
driver_instance must map the first portions of all the _info and _instance
blocks for this shared code to work.

Arguments:
  class                      "router", "transport", or "authenticator"
  anchor                     &routers, &transports, &auths
  drivers_available          available drivers
  size_of_info               size of each info block
  instance_default           points to default data for an instance
  instance_size              size of instance block
  driver_optionlist          generic option list
  driver_optionlist_count    count of generic option list

Returns:                     nothing
*/

void
readconf_driver_init(
  uschar *class,
  driver_instance **anchor,
  driver_info *drivers_available,
  int size_of_info,
  void *instance_default,
  int  instance_size,
  optionlist *driver_optionlist,
  int  driver_optionlist_count)
{
driver_instance **p = anchor;
driver_instance *d = NULL;
uschar *buffer;

while ((buffer = get_config_line()))
  {
  uschar name[EXIM_DRIVERNAME_MAX];
  uschar *s;

  /* Read the first name on the line and test for the start of a new driver. A
  macro definition indicates the end of the previous driver. If this isn't the
  start of a new driver, the line will be re-read. */

  s = readconf_readname(name, sizeof(name), buffer);

  /* Handle macro definition, first finishing off the initialization of the
  previous driver, if any. */

  if (isupper(*name) && *s == '=')
    {
    if (d)
      {
      if (!d->driver_name)
        log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
          "no driver defined for %s \"%s\"", class, d->name);
      /* s is using big_buffer, so this call had better not */
      (d->info->init)(d);
      d = NULL;
      }
    if (!macro_read_assignment(buffer)) exim_exit(EXIT_FAILURE);
    continue;
    }

  /* If the line starts with a name terminated by a colon, we are at the
  start of the definition of a new driver. The rest of the line must be
  blank. */

  if (*s++ == ':')
    {
    /* Finish off initializing the previous driver. */

    if (d)
      {
      if (!d->driver_name)
        log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
          "no driver defined for %s \"%s\"", class, d->name);
      (d->info->init)(d);
      }

    /* Check that we haven't already got a driver of this name */

    for (d = *anchor; d; d = d->next)
      if (Ustrcmp(name, d->name) == 0)
        log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
          "there are two %ss called \"%s\"", class, name);

    /* Set up a new driver instance data block on the chain, with
    its default values installed. */

    d = store_get(instance_size, FALSE);
    memcpy(d, instance_default, instance_size);
    *p = d;
    p = &d->next;
    d->name = string_copy(name);

    /* Clear out the "set" bits in the generic options */

    for (int i = 0; i < driver_optionlist_count; i++)
      driver_optionlist[i].type &= ~opt_set;

    /* Check nothing more on this line, then do the next loop iteration. */

    Uskip_whitespace(&s);
    if (*s) extra_chars_error(s, US"driver name ", name, US"");
    continue;
    }

  /* Not the start of a new driver. Give an error if we have not set up a
  current driver yet. */

  if (!d)
    log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s name missing", class);

  /* First look to see if this is a generic option; if it is "driver",
  initialize the driver. If is it not a generic option, we can look for a
  private option provided that the driver has been previously set up. */

  if (readconf_handle_option(buffer, driver_optionlist,
        driver_optionlist_count, d, NULL))
    {
    if (!d->info && d->driver_name)
      init_driver(d, drivers_available, size_of_info, class);
    }

  /* Handle private options - pass the generic block because some may
  live therein. A flag with each option indicates if it is in the public
  block. */

  else if (d->info)
    readconf_handle_option(buffer, d->info->options,
      *(d->info->options_count), d, US"option \"%s\" unknown");

  /* The option is not generic and the driver name has not yet been given. */

  else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option \"%s\" unknown "
    "(\"driver\" must be specified before any private options)", name);
  }

/* Run the initialization function for the final driver. */

if (d)
  {
  if (!d->driver_name)
    log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
      "no driver defined for %s \"%s\"", class, d->name);
  (d->info->init)(d);
  }
}



/*************************************************
*            Check driver dependency             *
*************************************************/

/* This function is passed a driver instance and a string. It checks whether
any of the string options for the driver contains the given string as an
expansion variable.

Arguments:
  d        points to a driver instance block
  s        the string to search for

Returns:   TRUE if a dependency is found
*/

BOOL
readconf_depends(driver_instance *d, uschar *s)
{
int count = *(d->info->options_count);
uschar *ss;

for (optionlist * ol = d->info->options; ol < d->info->options + count; ol++)
  if ((ol->type & opt_mask) == opt_stringptr)
    {
    void * options_block = ol->type & opt_public ? (void *)d : d->options_block;
    uschar * value = *USS(US options_block + ol->v.offset);

    if (value && (ss = Ustrstr(value, s)) != NULL)
      {
      if (ss <= value || (ss[-1] != '$' && ss[-1] != '{') ||
	isalnum(ss[Ustrlen(s)])) continue;
      DEBUG(D_transport) debug_printf("driver %s: \"%s\" option depends on %s\n",
	d->name, ol->name, s);
      return TRUE;
      }
    }

DEBUG(D_transport) debug_printf("driver %s does not depend on %s\n", d->name, s);
return FALSE;
}




/*************************************************
*      Decode an error type for retries          *
*************************************************/

/* This function is global because it is also called from the main
program when testing retry information. It decodes strings such as "quota_7d"
into numerical error codes.

Arguments:
  pp           points to start of text
  p            points past end of text
  basic_errno  points to an int to receive the main error number
  more_errno   points to an int to receive the secondary error data

Returns:       NULL if decoded correctly; else points to error text
*/

uschar *
readconf_retry_error(const uschar *pp, const uschar *p,
  int *basic_errno, int *more_errno)
{
int len;
const uschar *q = pp;
while (q < p && *q != '_') q++;
len = q - pp;

if (len == 5 && strncmpic(pp, US"quota", len) == 0)
  {
  *basic_errno = ERRNO_EXIMQUOTA;
  if (q != p && (*more_errno = readconf_readtime(q+1, *p, FALSE)) < 0)
      return US"bad time value";
  }

else if (len == 7 && strncmpic(pp, US"refused", len) == 0)
  {
  *basic_errno = ECONNREFUSED;
  if (q != p)
    {
    if (strncmpic(q+1, US"MX", p-q-1) == 0) *more_errno = 'M';
    else if (strncmpic(q+1, US"A", p-q-1) == 0) *more_errno = 'A';
    else return US"A or MX expected after \"refused\"";
    }
  }

else if (len == 7 && strncmpic(pp, US"timeout", len) == 0)
  {
  *basic_errno = ETIMEDOUT;
  if (q != p)
    {
    int i;
    int xlen = p - q - 1;
    const uschar *x = q + 1;

    static uschar *extras[] =
      { US"A", US"MX", US"connect", US"connect_A",  US"connect_MX" };
    static int values[] =
      { 'A',   'M',    RTEF_CTOUT,  RTEF_CTOUT|'A', RTEF_CTOUT|'M' };

    for (i = 0; i < nelem(extras); i++)
      if (strncmpic(x, extras[i], xlen) == 0)
        {
        *more_errno = values[i];
        break;
        }

    if (i >= nelem(extras))
      if (strncmpic(x, US"DNS", xlen) == 0)
        log_write(0, LOG_MAIN|LOG_PANIC, "\"timeout_dns\" is no longer "
          "available in retry rules (it has never worked) - treated as "
          "\"timeout\"");
      else
        return US"\"A\", \"MX\", or \"connect\" expected after \"timeout\"";
    }
  }

else if (strncmpic(pp, US"mail_4", 6) == 0 ||
         strncmpic(pp, US"rcpt_4", 6) == 0 ||
         strncmpic(pp, US"data_4", 6) == 0)
  {
  BOOL bad = FALSE;
  int x = 255;                           /* means "any 4xx code" */
  if (p != pp + 8) bad = TRUE; else
    {
    int a = pp[6], b = pp[7];
    if (isdigit(a))
      {
      x = (a - '0') * 10;
      if (isdigit(b)) x += b - '0';
      else if (b == 'x') x += 100;
      else bad = TRUE;
      }
    else if (a != 'x' || b != 'x') bad = TRUE;
    }

  if (bad)
    return string_sprintf("%.4s_4 must be followed by xx, dx, or dd, where "
      "x is literal and d is any digit", pp);

  *basic_errno = *pp == 'm' ? ERRNO_MAIL4XX :
                 *pp == 'r' ? ERRNO_RCPT4XX : ERRNO_DATA4XX;
  *more_errno = x << 8;
  }

else if (len == 4 && strncmpic(pp, US"auth", len) == 0 &&
         strncmpic(q+1, US"failed", p-q-1) == 0)
  *basic_errno = ERRNO_AUTHFAIL;

else if (strncmpic(pp, US"lost_connection", p - pp) == 0)
  *basic_errno = ERRNO_SMTPCLOSED;

else if (strncmpic(pp, US"tls_required", p - pp) == 0)
  *basic_errno = ERRNO_TLSREQUIRED;

else if (strncmpic(pp, US"lookup", p - pp) == 0)
  *basic_errno = ERRNO_UNKNOWNHOST;

else if (len != 1 || Ustrncmp(pp, "*", 1) != 0)
  return string_sprintf("unknown or malformed retry error \"%.*s\"", (int) (p-pp), pp);

return NULL;
}




/*************************************************
*                Read retry information          *
*************************************************/

/* Each line of retry information contains:

.  A domain name pattern or an address pattern;

.  An error name, possibly with additional data, or *;

.  An optional sequence of retry items, each consisting of an identifying
   letter, a cutoff time, and optional parameters.

All this is decoded and placed into a control block. */


/* Subroutine to read an argument, preceded by a comma and terminated
by comma, semicolon, whitespace, or newline. The types are: 0 = time value,
1 = fixed point number (returned *1000).

Arguments:
  paddr     pointer to pointer to current character; updated
  type      0 => read a time; 1 => read a fixed point number

Returns:    time in seconds or fixed point number * 1000
*/

static int
retry_arg(const uschar **paddr, int type)
{
const uschar *p = *paddr;
const uschar *pp;

if (*p++ != ',') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma expected");

Uskip_whitespace(&p);
pp = p;
while (isalnum(*p) || (type == 1 && *p == '.')) p++;

if (*p != 0 && !isspace(*p) && *p != ',' && *p != ';')
  log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma or semicolon expected");

*paddr = p;
switch (type)
  {
  case 0: return readconf_readtime(pp, *p, FALSE);
  case 1: return readconf_readfixed(pp, *p);
  }
return 0;    /* Keep picky compilers happy */
}

/* The function proper */

void
readconf_retries(void)
{
retry_config **chain = &retries;
retry_config *next;
const uschar *p;

while ((p = get_config_line()))
  {
  retry_rule **rchain;
  const uschar *pp;
  uschar *error;

  next = store_get(sizeof(retry_config), FALSE);
  next->next = NULL;
  *chain = next;
  chain = &(next->next);
  next->basic_errno = next->more_errno = 0;
  next->senders = NULL;
  next->rules = NULL;
  rchain = &(next->rules);

  next->pattern = string_dequote(&p);
  Uskip_whitespace(&p);
  pp = p;
  while (mac_isgraph(*p)) p++;
  if (p - pp <= 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
    "missing error type in retry rule");

  /* Test error names for things we understand. */

  if ((error = readconf_retry_error(pp, p, &next->basic_errno,
       &next->more_errno)))
    log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s", error);

  /* There may be an optional address list of senders to be used as another
  constraint on the rule. This was added later, so the syntax is a bit of a
  fudge. Anything that is not a retry rule starting "F," or "G," is treated as
  an address list. */

  Uskip_whitespace(&p);
  if (Ustrncmp(p, "senders", 7) == 0)
    {
    p += 7;
    Uskip_whitespace(&p);
    if (*p++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
      "\"=\" expected after \"senders\" in retry rule");
    Uskip_whitespace(&p);
    next->senders = string_dequote(&p);
    }

  /* Now the retry rules. Keep the maximum timeout encountered. */

  Uskip_whitespace(&p);

  while (*p)
    {
    retry_rule *rule = store_get(sizeof(retry_rule), FALSE);
    *rchain = rule;
    rchain = &(rule->next);
    rule->next = NULL;
    rule->rule = toupper(*p++);
    rule->timeout = retry_arg(&p, 0);
    if (rule->timeout > retry_maximum_timeout)
      retry_maximum_timeout = rule->timeout;

    switch (rule->rule)
      {
      case 'F':   /* Fixed interval */
	rule->p1 = retry_arg(&p, 0);
	break;

      case 'G':   /* Geometrically increasing intervals */
      case 'H':   /* Ditto, but with randomness */
	rule->p1 = retry_arg(&p, 0);
	rule->p2 = retry_arg(&p, 1);
	break;

      default:
	log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unknown retry rule letter");
	break;
      }

    if (rule->timeout <= 0 || rule->p1 <= 0 ||
          (rule->rule != 'F' && rule->p2 < 1000))
      log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
        "bad parameters for retry rule");

    if (Uskip_whitespace(&p) == ';')
      {
      p++;
      Uskip_whitespace(&p);
      }
    else if (*p)
      log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "semicolon expected");
    }
  }
}



/*************************************************
*         Initialize authenticators              *
*************************************************/

/* Read the authenticators section of the configuration file.

Arguments:   none
Returns:     nothing
*/

static void
auths_init(void)
{
#ifndef DISABLE_PIPE_CONNECT
int nauths = 0;
#endif

readconf_driver_init(US"authenticator",
  (driver_instance **)(&auths),      /* chain anchor */
  (driver_info *)auths_available,    /* available drivers */
  sizeof(auth_info),                 /* size of info block */
  &auth_defaults,                    /* default values for generic options */
  sizeof(auth_instance),             /* size of instance block */
  optionlist_auths,                  /* generic options */
  optionlist_auths_size);

for (auth_instance * au = auths; au; au = au->next)
  {
  if (!au->public_name)
    log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "no public name specified for "
      "the %s authenticator", au->name);

  for (auth_instance * bu = au->next; bu; bu = bu->next)
    if (strcmpic(au->public_name, bu->public_name) == 0)
      if ((au->client && bu->client) || (au->server && bu->server))
        log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "two %s authenticators "
          "(%s and %s) have the same public name (%s)",
          au->client ? US"client" : US"server", au->name, bu->name,
          au->public_name);
#ifndef DISABLE_PIPE_CONNECT
  nauths++;
#endif
  }
#ifndef DISABLE_PIPE_CONNECT
f.smtp_in_early_pipe_no_auth = nauths > 16;
#endif
}




/*************************************************
*             Read ACL information               *
*************************************************/

/* If this run of Exim is not doing something that involves receiving a
message, we can just skip over the ACL information. No need to parse it.

First, we have a function for acl_read() to call back to get the next line. We
need to remember the line we passed, because at the end it will contain the
name of the next ACL. */

static uschar *acl_line;

static uschar *
acl_callback(void)
{
acl_line = get_config_line();
return acl_line;
}


/* Now the main function:

Arguments:    none
Returns:      nothing
*/

static void
readconf_acl(void)
{
uschar *p;

/* Read each ACL and add it into the tree. Macro (re)definitions are allowed
between ACLs. */

acl_line = get_config_line();

while(acl_line)
  {
  uschar name[EXIM_DRIVERNAME_MAX];
  tree_node *node;
  uschar *error;

  p = readconf_readname(name, sizeof(name), acl_line);
  if (isupper(*name) && *p == '=')
    {
    if (!macro_read_assignment(acl_line)) exim_exit(EXIT_FAILURE);
    acl_line = get_config_line();
    continue;
    }

  if (*p != ':' || name[0] == 0)
    log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing or malformed ACL name");

  node = store_get(sizeof(tree_node) + Ustrlen(name), is_tainted(name));
  Ustrcpy(node->name, name);
  if (!tree_insertnode(&acl_anchor, node))
    log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
      "there are two ACLs called \"%s\"", name);

  node->data.ptr = acl_read(acl_callback, &error);

  if (node->data.ptr == NULL && error != NULL)
    log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "error in ACL: %s", error);
  }
}



/*************************************************
*     Read configuration for local_scan()        *
*************************************************/

/* This function is called after "begin local_scan" is encountered in the
configuration file. If the local_scan() function allows for configuration
options, we can process them. Otherwise, we expire in a panic.

Arguments:  none
Returns:    nothing
*/

static void
local_scan_init(void)
{
#ifndef LOCAL_SCAN_HAS_OPTIONS
log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "local_scan() options not supported: "
  "(LOCAL_SCAN_HAS_OPTIONS not defined in Local/Makefile)");
#else

uschar *p;
while ((p = get_config_line()))
  (void) readconf_handle_option(p, local_scan_options, local_scan_options_count,
    NULL, US"local_scan option \"%s\" unknown");
#endif
}



/*************************************************
*     Read rest of configuration (after main)    *
*************************************************/

/* This function reads the rest of the runtime configuration, after the main
configuration. It is called only when actually needed. Each subsequent section
of the configuration starts with a line of the form

  begin name

where the name is "routers", "transports", etc. A section is terminated by
hitting the next "begin" line, and the next name is left in next_section.
Because it may confuse people as to whether the names are singular or plural,
we add "s" if it's missing. There is always enough room in next_section for
this. This function is basically just a switch.

Arguments:   none
Returns:     nothing
*/

static uschar *section_list[] = {
  US"acls",
  US"authenticators",
  US"local_scans",
  US"retrys",
  US"rewrites",
  US"routers",
  US"transports"};

void
readconf_rest(void)
{
int had = 0;

while(next_section[0] != 0)
  {
  int bit;
  int first = 0;
  int last = nelem(section_list);
  int mid = last/2;
  int n = Ustrlen(next_section);

  if (tolower(next_section[n-1]) != 's') Ustrcpy(next_section+n, US"s");

  for (;;)
    {
    int c = strcmpic(next_section, section_list[mid]);
    if (c == 0) break;
    if (c > 0) first = mid + 1; else last = mid;
    if (first >= last)
      log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
        "\"%.*s\" is not a known configuration section name", n, next_section);
    mid = (last + first)/2;
    }

  bit = 1 << mid;
  if (((had ^= bit) & bit) == 0)
    log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
      "\"%.*s\" section is repeated in the configuration file", n,
        next_section);

  switch(mid)
    {
    case 0: readconf_acl(); break;
    case 1: auths_init(); break;
    case 2: local_scan_init(); break;
    case 3: readconf_retries(); break;
    case 4: readconf_rewrites(); break;
    case 5: route_init(); break;
    case 6: transport_init(); break;
    }
  }

(void)fclose(config_file);
}

/* Init the storage for the pre-parsed config lines */
void
readconf_save_config(const uschar *s)
{
save_config_line(string_sprintf("# Exim Configuration (%s)",
  f.running_in_test_harness ? US"X" : s));
}

static void
save_config_position(const uschar *file, int line)
{
save_config_line(string_sprintf("# %d \"%s\"", line, file));
}

/* Append a pre-parsed logical line to the config lines store,
this operates on a global (static) list that holds all the pre-parsed
config lines, we do no further processing here, output formatting and
honouring of <hide> or macros will be done during output */

static void
save_config_line(const uschar* line)
{
static config_line_item *current;
config_line_item *next;

next = (config_line_item*) store_get(sizeof(config_line_item), FALSE);
next->line = string_copy(line);
next->next = NULL;

if (!config_lines) config_lines = next;
else current->next = next;

current = next;
}

/* List the parsed config lines, care about nice formatting and
hide the <hide> values unless we're the admin user */
void
print_config(BOOL admin, BOOL terse)
{
const int TS = terse ? 0 : 2;
int indent = 0;

for (config_line_item * i = config_lines; i; i = i->next)
  {
  uschar *current;
  uschar *p;

  /* skip over to the first non-space */
  for (current = i->line; *current && isspace(*current); ++current)
    ;

  if (*current == '\0')
    continue;

  /* Collapse runs of spaces. We stop this if we encounter one of the
   * following characters: "'$, as this may indicate careful formatting */
  for (p = current; *p; ++p)
    {
    uschar *next;
    if (!isspace(*p)) continue;
    if (*p != ' ') *p = ' ';

    for (next = p; isspace(*next); ++next)
      ;

    if (next - p > 1)
      memmove(p+1, next, Ustrlen(next)+1);

    if (*next == '"' || *next == '\'' || *next == '$')
      break;
    }

  /* # lines */
  if (current[0] == '#')
    puts(CCS current);

  /* begin lines are left aligned */
  else if (Ustrncmp(current, "begin", 5) == 0 && isspace(current[5]))
    {
    if (!terse) puts("");
    puts(CCS current);
    indent = TS;
    }

  /* router/acl/transport block names */
  else if (current[Ustrlen(current)-1] == ':' && !Ustrchr(current, '='))
    {
    if (!terse) puts("");
    printf("%*s%s\n", TS, "", current);
    indent = 2 * TS;
    }

  /* hidden lines (all MACROS or lines prefixed with "hide") */
  else if (  !admin
	  && (  isupper(*current)
	     || Ustrncmp(current, "hide", 4) == 0 && isspace(current[4])
	     )
	  )
    {
    if ((p = Ustrchr(current, '=')))
      {
      *p = '\0';
      printf("%*s%s= %s\n", indent, "", current, CCS hidden);
      }
    /* e.g.: hide split_spool_directory */
    else
      printf("%*s\n", indent, CCS hidden);
    }

  else
    /* rest is public */
    printf("%*s%s\n", indent, "", current);
  }
}

#endif	/*!MACRO_PREDEF*/
/* vi: aw ai sw=2
*/
/* End of readconf.c */