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
|
# SOME DESCRIPTIVE TITLE
# Copyright (C) YEAR Free Software Foundation, Inc.
# This file is distributed under the same license as the PACKAGE package.
# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
#
#, fuzzy
msgid ""
msgstr ""
"Project-Id-Version: PACKAGE VERSION\n"
"POT-Creation-Date: 2024-06-01 06:05+0200\n"
"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
"Language-Team: LANGUAGE <LL@li.org>\n"
"Language: \n"
"MIME-Version: 1.0\n"
"Content-Type: text/plain; charset=UTF-8\n"
"Content-Transfer-Encoding: 8bit\n"
#. type: TH
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "MSGOP"
msgstr ""
#. type: TH
#: archlinux debian-unstable opensuse-tumbleweed
#, no-wrap
msgid "2024-05-02"
msgstr ""
#. type: TH
#: archlinux debian-unstable
#, no-wrap
msgid "Linux man-pages 6.8"
msgstr ""
#. type: SH
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "NAME"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid "msgrcv, msgsnd - System V message queue operations"
msgstr ""
#. type: SH
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "LIBRARY"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid "Standard C library (I<libc>, I<-lc>)"
msgstr ""
#. type: SH
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "SYNOPSIS"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "B<#include E<lt>sys/msg.hE<gt>>\n"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid ""
"B<int msgsnd(int >I<msqid>B<, const void >I<msgp>B<[.>I<msgsz>B<], size_t >I<msgsz>B<,>\n"
"B< int >I<msgflg>B<);>\n"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid ""
"B<ssize_t msgrcv(int >I<msqid>B<, void >I<msgp>B<[.>I<msgsz>B<], size_t >I<msgsz>B<, long >I<msgtyp>B<,>\n"
"B< int >I<msgflg>B<);>\n"
msgstr ""
#. type: SH
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "DESCRIPTION"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"The B<msgsnd>() and B<msgrcv>() system calls are used to send messages to, "
"and receive messages from, a System\\ V message queue. The calling process "
"must have write permission on the message queue in order to send a message, "
"and read permission to receive a message."
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"The I<msgp> argument is a pointer to a caller-defined structure of the "
"following general form:"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid ""
"struct msgbuf {\n"
" long mtype; /* message type, must be E<gt> 0 */\n"
" char mtext[1]; /* message data */\n"
"};\n"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"The I<mtext> field is an array (or other structure) whose size is specified "
"by I<msgsz>, a nonnegative integer value. Messages of zero length (i.e., no "
"I<mtext> field) are permitted. The I<mtype> field must have a strictly "
"positive integer value. This value can be used by the receiving process for "
"message selection (see the description of B<msgrcv>() below)."
msgstr ""
#. type: SS
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "msgsnd()"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"The B<msgsnd>() system call appends a copy of the message pointed to by "
"I<msgp> to the message queue whose identifier is specified by I<msqid>."
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"If sufficient space is available in the queue, B<msgsnd>() succeeds "
"immediately. The queue capacity is governed by the I<msg_qbytes> field in "
"the associated data structure for the message queue. During queue creation "
"this field is initialized to B<MSGMNB> bytes, but this limit can be modified "
"using B<msgctl>(2). A message queue is considered to be full if either of "
"the following conditions is true:"
msgstr ""
#. type: IP
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "\\[bu]"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"Adding a new message to the queue would cause the total number of bytes in "
"the queue to exceed the queue's maximum size (the I<msg_qbytes> field)."
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"Adding another message to the queue would cause the total number of messages "
"in the queue to exceed the queue's maximum size (the I<msg_qbytes> field). "
"This check is necessary to prevent an unlimited number of zero-length "
"messages being placed on the queue. Although such messages contain no data, "
"they nevertheless consume (locked) kernel memory."
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"If insufficient space is available in the queue, then the default behavior "
"of B<msgsnd>() is to block until space becomes available. If B<IPC_NOWAIT> "
"is specified in I<msgflg>, then the call instead fails with the error "
"B<EAGAIN>."
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid "A blocked B<msgsnd>() call may also fail if:"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"the queue is removed, in which case the system call fails with I<errno> set "
"to B<EIDRM>; or"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"a signal is caught, in which case the system call fails with I<errno> set to "
"B<EINTR>;B<see> B<signal>(7). (B<msgsnd>() is never automatically "
"restarted after being interrupted by a signal handler, regardless of the "
"setting of the B<SA_RESTART> flag when establishing a signal handler.)"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"Upon successful completion the message queue data structure is updated as "
"follows:"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid "I<msg_lspid> is set to the process ID of the calling process."
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid "I<msg_qnum> is incremented by 1."
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid "I<msg_stime> is set to the current time."
msgstr ""
#. type: SS
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "msgrcv()"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"The B<msgrcv>() system call removes a message from the queue specified by "
"I<msqid> and places it in the buffer pointed to by I<msgp>."
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"The argument I<msgsz> specifies the maximum size in bytes for the member "
"I<mtext> of the structure pointed to by the I<msgp> argument. If the "
"message text has length greater than I<msgsz>, then the behavior depends on "
"whether B<MSG_NOERROR> is specified in I<msgflg>. If B<MSG_NOERROR> is "
"specified, then the message text will be truncated (and the truncated part "
"will be lost); if B<MSG_NOERROR> is not specified, then the message isn't "
"removed from the queue and the system call fails returning -1 with I<errno> "
"set to B<E2BIG>."
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"Unless B<MSG_COPY> is specified in I<msgflg> (see below), the I<msgtyp> "
"argument specifies the type of message requested, as follows:"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid "If I<msgtyp> is 0, then the first message in the queue is read."
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"If I<msgtyp> is greater than 0, then the first message in the queue of type "
"I<msgtyp> is read, unless B<MSG_EXCEPT> was specified in I<msgflg>, in which "
"case the first message in the queue of type not equal to I<msgtyp> will be "
"read."
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"If I<msgtyp> is less than 0, then the first message in the queue with the "
"lowest type less than or equal to the absolute value of I<msgtyp> will be "
"read."
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"The I<msgflg> argument is a bit mask constructed by ORing together zero or "
"more of the following flags:"
msgstr ""
#. type: TP
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "B<IPC_NOWAIT>"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"Return immediately if no message of the requested type is in the queue. The "
"system call fails with I<errno> set to B<ENOMSG>."
msgstr ""
#. type: TP
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "B<MSG_COPY> (since Linux 3.8)"
msgstr ""
#. commit 4a674f34ba04a002244edaf891b5da7fc1473ae8
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"Nondestructively fetch a copy of the message at the ordinal position in the "
"queue specified by I<msgtyp> (messages are considered to be numbered "
"starting at 0)."
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"This flag must be specified in conjunction with B<IPC_NOWAIT>, with the "
"result that, if there is no message available at the given position, the "
"call fails immediately with the error B<ENOMSG>. Because they alter the "
"meaning of I<msgtyp> in orthogonal ways, B<MSG_COPY> and B<MSG_EXCEPT> may "
"not both be specified in I<msgflg>."
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"The B<MSG_COPY> flag was added for the implementation of the kernel "
"checkpoint-restore facility and is available only if the kernel was built "
"with the B<CONFIG_CHECKPOINT_RESTORE> option."
msgstr ""
#. type: TP
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "B<MSG_EXCEPT>"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"Used with I<msgtyp> greater than 0 to read the first message in the queue "
"with message type that differs from I<msgtyp>."
msgstr ""
#. type: TP
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "B<MSG_NOERROR>"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid "To truncate the message text if longer than I<msgsz> bytes."
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"If no message of the requested type is available and B<IPC_NOWAIT> isn't "
"specified in I<msgflg>, the calling process is blocked until one of the "
"following conditions occurs:"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid "A message of the desired type is placed in the queue."
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"The message queue is removed from the system. In this case, the system call "
"fails with I<errno> set to B<EIDRM>."
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"The calling process catches a signal. In this case, the system call fails "
"with I<errno> set to B<EINTR>. (B<msgrcv>() is never automatically "
"restarted after being interrupted by a signal handler, regardless of the "
"setting of the B<SA_RESTART> flag when establishing a signal handler.)"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid "I<msg_lrpid> is set to the process ID of the calling process."
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid "I<msg_qnum> is decremented by 1."
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid "I<msg_rtime> is set to the current time."
msgstr ""
#. type: SH
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "RETURN VALUE"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"On success, B<msgsnd>() returns 0 and B<msgrcv>() returns the number of "
"bytes actually copied into the I<mtext> array. On failure, both functions "
"return -1, and set I<errno> to indicate the error."
msgstr ""
#. type: SH
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "ERRORS"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid "B<msgsnd>() can fail with the following errors:"
msgstr ""
#. type: TP
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "B<EACCES>"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"The calling process does not have write permission on the message queue, and "
"does not have the B<CAP_IPC_OWNER> capability in the user namespace that "
"governs its IPC namespace."
msgstr ""
#. type: TP
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "B<EAGAIN>"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"The message can't be sent due to the I<msg_qbytes> limit for the queue and "
"B<IPC_NOWAIT> was specified in I<msgflg>."
msgstr ""
#. type: TP
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "B<EFAULT>"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid "The address pointed to by I<msgp> isn't accessible."
msgstr ""
#. type: TP
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "B<EIDRM>"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid "The message queue was removed."
msgstr ""
#. type: TP
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "B<EINTR>"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"Sleeping on a full message queue condition, the process caught a signal."
msgstr ""
#. type: TP
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "B<EINVAL>"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"Invalid I<msqid> value, or nonpositive I<mtype> value, or invalid I<msgsz> "
"value (less than 0 or greater than the system value B<MSGMAX>)."
msgstr ""
#. type: TP
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "B<ENOMEM>"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"The system does not have enough memory to make a copy of the message pointed "
"to by I<msgp>."
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid "B<msgrcv>() can fail with the following errors:"
msgstr ""
#. type: TP
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "B<E2BIG>"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"The message text length is greater than I<msgsz> and B<MSG_NOERROR> isn't "
"specified in I<msgflg>."
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"The calling process does not have read permission on the message queue, and "
"does not have the B<CAP_IPC_OWNER> capability in the user namespace that "
"governs its IPC namespace."
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"While the process was sleeping to receive a message, the message queue was "
"removed."
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"While the process was sleeping to receive a message, the process caught a "
"signal; see B<signal>(7)."
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid "I<msqid> was invalid, or I<msgsz> was less than 0."
msgstr ""
#. type: TP
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "B<EINVAL> (since Linux 3.14)"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid "I<msgflg> specified B<MSG_COPY>, but not B<IPC_NOWAIT>."
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid "I<msgflg> specified both B<MSG_COPY> and B<MSG_EXCEPT>."
msgstr ""
#. type: TP
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "B<ENOMSG>"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"B<IPC_NOWAIT> was specified in I<msgflg> and no message of the requested "
"type existed on the message queue."
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"B<IPC_NOWAIT> and B<MSG_COPY> were specified in I<msgflg> and the queue "
"contains less than I<msgtyp> messages."
msgstr ""
#. type: TP
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "B<ENOSYS> (since Linux 3.8)"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"Both B<MSG_COPY> and B<IPC_NOWAIT> were specified in I<msgflg>, and this "
"kernel was configured without B<CONFIG_CHECKPOINT_RESTORE>."
msgstr ""
#. type: SH
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "STANDARDS"
msgstr ""
#. type: Plain text
#: archlinux debian-unstable fedora-40 fedora-rawhide mageia-cauldron
#: opensuse-leap-15-6 opensuse-tumbleweed
msgid "POSIX.1-2008."
msgstr ""
#. MSG_COPY since glibc 2.18
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"The B<MSG_EXCEPT> and B<MSG_COPY> flags are Linux-specific; their "
"definitions can be obtained by defining the B<_GNU_SOURCE> feature test "
"macro."
msgstr ""
#. type: SH
#: archlinux debian-unstable fedora-40 fedora-rawhide mageia-cauldron
#: opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "HISTORY"
msgstr ""
#. type: Plain text
#: archlinux debian-unstable fedora-40 fedora-rawhide mageia-cauldron
#: opensuse-leap-15-6 opensuse-tumbleweed
msgid "POSIX.1-2001, SVr4."
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"The I<msgp> argument is declared as I<struct msgbuf\\ *> in glibc 2.0 and "
"2.1. It is declared as I<void\\ *> in glibc 2.2 and later, as required by "
"SUSv2 and SUSv3."
msgstr ""
#. type: SH
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "NOTES"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"The following limits on message queue resources affect the B<msgsnd>() call:"
msgstr ""
#. type: TP
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "B<MSGMAX>"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"Maximum size of a message text, in bytes (default value: 8192 bytes). On "
"Linux, this limit can be read and modified via I</proc/sys/kernel/msgmax>."
msgstr ""
#. type: TP
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "B<MSGMNB>"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"Maximum number of bytes that can be held in a message queue (default value: "
"16384 bytes). On Linux, this limit can be read and modified via I</proc/sys/"
"kernel/msgmnb>. A privileged process (Linux: a process with the "
"B<CAP_SYS_RESOURCE> capability) can increase the size of a message queue "
"beyond B<MSGMNB> using the B<msgctl>(2) B<IPC_SET> operation."
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"The implementation has no intrinsic system-wide limits on the number of "
"message headers (B<MSGTQL>) and the number of bytes in the message pool "
"(B<MSGPOOL>)."
msgstr ""
#. type: SH
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "BUGS"
msgstr ""
#. http://marc.info/?l=linux-kernel&m=139048542803605&w=2
#. commit 4f87dac386cc43d5525da7a939d4b4e7edbea22c
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"In Linux 3.13 and earlier, if B<msgrcv>() was called with the B<MSG_COPY> "
"flag, but without B<IPC_NOWAIT>, and the message queue contained less than "
"I<msgtyp> messages, then the call would block until the next message is "
"written to the queue. At that point, the call would return a copy of the "
"message, I<regardless> of whether that message was at the ordinal position "
"I<msgtyp>. This bug is fixed in Linux 3.14."
msgstr ""
#. http://marc.info/?l=linux-kernel&m=139048542803605&w=2
#. commit 4f87dac386cc43d5525da7a939d4b4e7edbea22c
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"Specifying both B<MSG_COPY> and B<MSC_EXCEPT> in I<msgflg> is a logical "
"error (since these flags impose different interpretations on I<msgtyp>). In "
"Linux 3.13 and earlier, this error was not diagnosed by B<msgrcv>(). This "
"bug is fixed in Linux 3.14."
msgstr ""
#. type: SH
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "EXAMPLES"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid "The program below demonstrates the use of B<msgsnd>() and B<msgrcv>()."
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"The example program is first run with the B<-s> option to send a message and "
"then run again with the B<-r> option to receive a message."
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid "The following shell session shows a sample run of the program:"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid ""
"$B< ./a.out -s>\n"
"sent: a message at Wed Mar 4 16:25:45 2015\n"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid ""
"$B< ./a.out -r>\n"
"message received: a message at Wed Mar 4 16:25:45 2015\n"
msgstr ""
#. type: SS
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "Program source"
msgstr ""
#. type: Plain text
#: archlinux debian-unstable fedora-40 fedora-rawhide mageia-cauldron
#: opensuse-tumbleweed
#, no-wrap
msgid ""
"#include E<lt>errno.hE<gt>\n"
"#include E<lt>stdio.hE<gt>\n"
"#include E<lt>stdlib.hE<gt>\n"
"#include E<lt>sys/ipc.hE<gt>\n"
"#include E<lt>sys/msg.hE<gt>\n"
"#include E<lt>time.hE<gt>\n"
"#include E<lt>unistd.hE<gt>\n"
"\\&\n"
"struct msgbuf {\n"
" long mtype;\n"
" char mtext[80];\n"
"};\n"
"\\&\n"
"static void\n"
"usage(char *prog_name, char *msg)\n"
"{\n"
" if (msg != NULL)\n"
" fputs(msg, stderr);\n"
"\\&\n"
" fprintf(stderr, \"Usage: %s [options]\\en\", prog_name);\n"
" fprintf(stderr, \"Options are:\\en\");\n"
" fprintf(stderr, \"-s send message using msgsnd()\\en\");\n"
" fprintf(stderr, \"-r read message using msgrcv()\\en\");\n"
" fprintf(stderr, \"-t message type (default is 1)\\en\");\n"
" fprintf(stderr, \"-k message queue key (default is 1234)\\en\");\n"
" exit(EXIT_FAILURE);\n"
"}\n"
"\\&\n"
"static void\n"
"send_msg(int qid, int msgtype)\n"
"{\n"
" time_t t;\n"
" struct msgbuf msg;\n"
"\\&\n"
" msg.mtype = msgtype;\n"
"\\&\n"
" time(&t);\n"
" snprintf(msg.mtext, sizeof(msg.mtext), \"a message at %s\",\n"
" ctime(&t));\n"
"\\&\n"
" if (msgsnd(qid, &msg, sizeof(msg.mtext),\n"
" IPC_NOWAIT) == -1)\n"
" {\n"
" perror(\"msgsnd error\");\n"
" exit(EXIT_FAILURE);\n"
" }\n"
" printf(\"sent: %s\\en\", msg.mtext);\n"
"}\n"
"\\&\n"
"static void\n"
"get_msg(int qid, int msgtype)\n"
"{\n"
" struct msgbuf msg;\n"
"\\&\n"
" if (msgrcv(qid, &msg, sizeof(msg.mtext), msgtype,\n"
" MSG_NOERROR | IPC_NOWAIT) == -1) {\n"
" if (errno != ENOMSG) {\n"
" perror(\"msgrcv\");\n"
" exit(EXIT_FAILURE);\n"
" }\n"
" printf(\"No message available for msgrcv()\\en\");\n"
" } else {\n"
" printf(\"message received: %s\\en\", msg.mtext);\n"
" }\n"
"}\n"
"\\&\n"
"int\n"
"main(int argc, char *argv[])\n"
"{\n"
" int qid, opt;\n"
" int mode = 0; /* 1 = send, 2 = receive */\n"
" int msgtype = 1;\n"
" int msgkey = 1234;\n"
"\\&\n"
" while ((opt = getopt(argc, argv, \"srt:k:\")) != -1) {\n"
" switch (opt) {\n"
" case \\[aq]s\\[aq]:\n"
" mode = 1;\n"
" break;\n"
" case \\[aq]r\\[aq]:\n"
" mode = 2;\n"
" break;\n"
" case \\[aq]t\\[aq]:\n"
" msgtype = atoi(optarg);\n"
" if (msgtype E<lt>= 0)\n"
" usage(argv[0], \"-t option must be greater than 0\\en\");\n"
" break;\n"
" case \\[aq]k\\[aq]:\n"
" msgkey = atoi(optarg);\n"
" break;\n"
" default:\n"
" usage(argv[0], \"Unrecognized option\\en\");\n"
" }\n"
" }\n"
"\\&\n"
" if (mode == 0)\n"
" usage(argv[0], \"must use either -s or -r option\\en\");\n"
"\\&\n"
" qid = msgget(msgkey, IPC_CREAT | 0666);\n"
"\\&\n"
" if (qid == -1) {\n"
" perror(\"msgget\");\n"
" exit(EXIT_FAILURE);\n"
" }\n"
"\\&\n"
" if (mode == 2)\n"
" get_msg(qid, msgtype);\n"
" else\n"
" send_msg(qid, msgtype);\n"
"\\&\n"
" exit(EXIT_SUCCESS);\n"
"}\n"
msgstr ""
#. SRC END
#. type: SH
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
#, no-wrap
msgid "SEE ALSO"
msgstr ""
#. type: Plain text
#: archlinux debian-bookworm debian-unstable fedora-40 fedora-rawhide
#: mageia-cauldron opensuse-leap-15-6 opensuse-tumbleweed
msgid ""
"B<msgctl>(2), B<msgget>(2), B<capabilities>(7), B<mq_overview>(7), "
"B<sysvipc>(7)"
msgstr ""
#. type: TH
#: debian-bookworm
#, no-wrap
msgid "2023-02-05"
msgstr ""
#. type: TH
#: debian-bookworm
#, no-wrap
msgid "Linux man-pages 6.03"
msgstr ""
#. type: Plain text
#: debian-bookworm
msgid "POSIX.1-2001, POSIX.1-2008, SVr4."
msgstr ""
#. type: Plain text
#: debian-bookworm opensuse-leap-15-6
#, no-wrap
msgid ""
"#include E<lt>errno.hE<gt>\n"
"#include E<lt>stdio.hE<gt>\n"
"#include E<lt>stdlib.hE<gt>\n"
"#include E<lt>sys/ipc.hE<gt>\n"
"#include E<lt>sys/msg.hE<gt>\n"
"#include E<lt>time.hE<gt>\n"
"#include E<lt>unistd.hE<gt>\n"
msgstr ""
#. type: Plain text
#: debian-bookworm opensuse-leap-15-6
#, no-wrap
msgid ""
"struct msgbuf {\n"
" long mtype;\n"
" char mtext[80];\n"
"};\n"
msgstr ""
#. type: Plain text
#: debian-bookworm opensuse-leap-15-6
#, no-wrap
msgid ""
"static void\n"
"usage(char *prog_name, char *msg)\n"
"{\n"
" if (msg != NULL)\n"
" fputs(msg, stderr);\n"
msgstr ""
#. type: Plain text
#: debian-bookworm opensuse-leap-15-6
#, no-wrap
msgid ""
" fprintf(stderr, \"Usage: %s [options]\\en\", prog_name);\n"
" fprintf(stderr, \"Options are:\\en\");\n"
" fprintf(stderr, \"-s send message using msgsnd()\\en\");\n"
" fprintf(stderr, \"-r read message using msgrcv()\\en\");\n"
" fprintf(stderr, \"-t message type (default is 1)\\en\");\n"
" fprintf(stderr, \"-k message queue key (default is 1234)\\en\");\n"
" exit(EXIT_FAILURE);\n"
"}\n"
msgstr ""
#. type: Plain text
#: debian-bookworm opensuse-leap-15-6
#, no-wrap
msgid ""
"static void\n"
"send_msg(int qid, int msgtype)\n"
"{\n"
" time_t t;\n"
" struct msgbuf msg;\n"
msgstr ""
#. type: Plain text
#: debian-bookworm opensuse-leap-15-6
#, no-wrap
msgid " msg.mtype = msgtype;\n"
msgstr ""
#. type: Plain text
#: debian-bookworm opensuse-leap-15-6
#, no-wrap
msgid ""
" time(&t);\n"
" snprintf(msg.mtext, sizeof(msg.mtext), \"a message at %s\",\n"
" ctime(&t));\n"
msgstr ""
#. type: Plain text
#: debian-bookworm opensuse-leap-15-6
#, no-wrap
msgid ""
" if (msgsnd(qid, &msg, sizeof(msg.mtext),\n"
" IPC_NOWAIT) == -1)\n"
" {\n"
" perror(\"msgsnd error\");\n"
" exit(EXIT_FAILURE);\n"
" }\n"
" printf(\"sent: %s\\en\", msg.mtext);\n"
"}\n"
msgstr ""
#. type: Plain text
#: debian-bookworm opensuse-leap-15-6
#, no-wrap
msgid ""
"static void\n"
"get_msg(int qid, int msgtype)\n"
"{\n"
" struct msgbuf msg;\n"
msgstr ""
#. type: Plain text
#: debian-bookworm opensuse-leap-15-6
#, no-wrap
msgid ""
" if (msgrcv(qid, &msg, sizeof(msg.mtext), msgtype,\n"
" MSG_NOERROR | IPC_NOWAIT) == -1) {\n"
" if (errno != ENOMSG) {\n"
" perror(\"msgrcv\");\n"
" exit(EXIT_FAILURE);\n"
" }\n"
" printf(\"No message available for msgrcv()\\en\");\n"
" } else {\n"
" printf(\"message received: %s\\en\", msg.mtext);\n"
" }\n"
"}\n"
msgstr ""
#. type: Plain text
#: debian-bookworm opensuse-leap-15-6
#, no-wrap
msgid ""
"int\n"
"main(int argc, char *argv[])\n"
"{\n"
" int qid, opt;\n"
" int mode = 0; /* 1 = send, 2 = receive */\n"
" int msgtype = 1;\n"
" int msgkey = 1234;\n"
msgstr ""
#. type: Plain text
#: debian-bookworm opensuse-leap-15-6
#, no-wrap
msgid ""
" while ((opt = getopt(argc, argv, \"srt:k:\")) != -1) {\n"
" switch (opt) {\n"
" case \\[aq]s\\[aq]:\n"
" mode = 1;\n"
" break;\n"
" case \\[aq]r\\[aq]:\n"
" mode = 2;\n"
" break;\n"
" case \\[aq]t\\[aq]:\n"
" msgtype = atoi(optarg);\n"
" if (msgtype E<lt>= 0)\n"
" usage(argv[0], \"-t option must be greater than 0\\en\");\n"
" break;\n"
" case \\[aq]k\\[aq]:\n"
" msgkey = atoi(optarg);\n"
" break;\n"
" default:\n"
" usage(argv[0], \"Unrecognized option\\en\");\n"
" }\n"
" }\n"
msgstr ""
#. type: Plain text
#: debian-bookworm opensuse-leap-15-6
#, no-wrap
msgid ""
" if (mode == 0)\n"
" usage(argv[0], \"must use either -s or -r option\\en\");\n"
msgstr ""
#. type: Plain text
#: debian-bookworm opensuse-leap-15-6
#, no-wrap
msgid " qid = msgget(msgkey, IPC_CREAT | 0666);\n"
msgstr ""
#. type: Plain text
#: debian-bookworm opensuse-leap-15-6
#, no-wrap
msgid ""
" if (qid == -1) {\n"
" perror(\"msgget\");\n"
" exit(EXIT_FAILURE);\n"
" }\n"
msgstr ""
#. type: Plain text
#: debian-bookworm opensuse-leap-15-6
#, no-wrap
msgid ""
" if (mode == 2)\n"
" get_msg(qid, msgtype);\n"
" else\n"
" send_msg(qid, msgtype);\n"
msgstr ""
#. type: Plain text
#: debian-bookworm opensuse-leap-15-6
#, no-wrap
msgid ""
" exit(EXIT_SUCCESS);\n"
"}\n"
msgstr ""
#. type: TH
#: fedora-40 fedora-rawhide mageia-cauldron
#, no-wrap
msgid "2023-10-31"
msgstr ""
#. type: TH
#: fedora-40 mageia-cauldron
#, no-wrap
msgid "Linux man-pages 6.06"
msgstr ""
#. type: TH
#: fedora-rawhide
#, no-wrap
msgid "Linux man-pages 6.7"
msgstr ""
#. type: TH
#: opensuse-leap-15-6
#, no-wrap
msgid "2023-03-30"
msgstr ""
#. type: TH
#: opensuse-leap-15-6
#, no-wrap
msgid "Linux man-pages 6.04"
msgstr ""
#. type: TH
#: opensuse-tumbleweed
#, no-wrap
msgid "Linux man-pages (unreleased)"
msgstr ""
|
