summaryrefslogtreecommitdiffstats
path: root/src/postconf/postconf_dbms.c
blob: 0ed5b53372a83f9cf65346a1c4b62daa97d1120c (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
/*++
/* NAME
/*	postconf_dbms 3
/* SUMMARY
/*	legacy support for database-defined main.cf parameter names
/* SYNOPSIS
/*	#include <postconf.h>
/*
/*	void	pcf_register_dbms_parameters(param_value, flag_parameter,
/*					local_scope)
/*	const char *param_value;
/*	const char *(flag_parameter) (const char *, int, PCF_MASTER_ENT *);
/*	PCF_MASTER_ENT *local_scope;
/* DESCRIPTION
/*	This module implements legacy support for database configuration
/*	where main.cf parameter names are generated by prepending
/*	the database name to a database-defined suffix.
/*
/*	Arguments:
/* .IP param_value
/*	A parameter value to be searched for "type:table" strings.
/*	When a database type is found that supports legacy-style
/*	configuration, the table name is combined with each of the
/*	database-defined suffixes to generate candidate parameter
/*	names for that database type; if the table name specifies
/*	a client configuration file, that file is scanned for unused
/*	parameter settings.
/* .IP flag_parameter
/*	A function that takes as arguments a candidate parameter
/*	name, parameter flags, and a PCF_MASTER_ENT pointer.  The
/*	function will flag the parameter as "used" if it has a
/*	"name=value" entry in the local or global namespace.
/* .IP local_scope
/*	The local namespace.
/* DIAGNOSTICS
/*	No explicit diagnostics.
/* LICENSE
/* .ad
/* .fi
/*	The Secure Mailer license must be distributed with this software.
/* AUTHOR(S)
/*	Wietse Venema
/*	IBM T.J. Watson Research
/*	P.O. Box 704
/*	Yorktown Heights, NY 10598, USA
/*
/*	Wietse Venema
/*	Google, Inc.
/*	111 8th Avenue
/*	New York, NY 10011, USA
/*--*/

/* System library. */

#include <sys_defs.h>
#include <sys/stat.h>
#include <errno.h>
#include <string.h>

/* Utility library. */

#include <stringops.h>
#include <split_at.h>
#include <mac_expand.h>
#include <dict.h>
#include <msg.h>
#include <mymalloc.h>

/* Global library. */

#include <mail_conf.h>
#include <mail_params.h>
#include <dict_ht.h>
#include <dict_proxy.h>
#include <dict_ldap.h>
#include <dict_mysql.h>
#include <dict_pgsql.h>
#include <dict_sqlite.h>
#include <dict_memcache.h>
#include <dict_regexp.h>
#include <dict_pcre.h>

/* Application-specific. */

#include <postconf.h>

 /*
  * SLMs.
  */
#define STR(x)	vstring_str(x)

#ifdef LEGACY_DBMS_SUPPORT

 /*
  * The legacy database interface automagically instantiates a list of
  * parameters by prepending the table name to database-specific suffixes.
  */

/* See ldap_table(5). */

static const char *pcf_ldap_suffixes[] = {
#include "pcf_ldap_suffixes.h"
    0,
};

/* See mysql_table(5). */

static const char *pcf_mysql_suffixes[] = {
#include "pcf_mysql_suffixes.h"
    0,
};

/* See pgsql_table(5). */

static const char *pcf_pgsql_suffixes[] = {
#include "pcf_pgsql_suffixes.h"
    0,
};

/* See sqlite_table(5). */

static const char *pcf_sqlite_suffixes[] = {
#include "pcf_sqlite_suffixes.h"
    0,
};

/* See memcache_table(5). */

static const char *pcf_memcache_suffixes[] = {
#include "pcf_memcache_suffixes.h"
    0,
};

 /*
  * Bundle up the database types and their suffix lists.
  */
typedef struct {
    const char *db_type;
    int     db_class;
    const char **db_suffixes;
} PCF_DBMS_INFO;

#define PCF_DBMS_CLASS_CLIENT	(1)	/* DB name is client config path */
#define PCF_DBMS_CLASS_REGEX	(2)	/* DB name contains regex patterns */

static const PCF_DBMS_INFO pcf_dbms_info[] = {
    {DICT_TYPE_LDAP, PCF_DBMS_CLASS_CLIENT, pcf_ldap_suffixes},
    {DICT_TYPE_MYSQL, PCF_DBMS_CLASS_CLIENT, pcf_mysql_suffixes},
    {DICT_TYPE_PGSQL, PCF_DBMS_CLASS_CLIENT, pcf_pgsql_suffixes},
    {DICT_TYPE_SQLITE, PCF_DBMS_CLASS_CLIENT, pcf_sqlite_suffixes},
    {DICT_TYPE_MEMCACHE, PCF_DBMS_CLASS_CLIENT, pcf_memcache_suffixes},
    {DICT_TYPE_REGEXP, PCF_DBMS_CLASS_REGEX},
    {DICT_TYPE_PCRE, PCF_DBMS_CLASS_REGEX},
    {0},
};

 /*
  * Workaround to prevent a false warning about "#comment after other text",
  * when an inline pcre or regexp pattern contains "#text".
  */
#define PCF_DBMS_RECURSE	1	/* Parse inline {map-entry} */
#define PCF_DBMS_NO_RECURSE	0	/* Don't parse inline {map-entry} */

/* pcf_check_dbms_client - look for unused names in client configuration */

static void pcf_check_dbms_client(const PCF_DBMS_INFO *dp, const char *cf_file)
{
    DICT   *dict;
    VSTREAM *fp;
    const char **cpp;
    const char *name;
    const char *value;
    char   *dict_spec;
    int     dir;

    /*
     * We read each database client configuration file into its own
     * dictionary, and nag only the first time that a file is visited.
     */
    dict_spec = concatenate(dp->db_type, ":", cf_file, (char *) 0);
    if ((dict = dict_handle(dict_spec)) == 0) {
	struct stat st;

	/*
	 * Populate the dictionary with settings in this database client
	 * configuration file. Don't die if a file can't be opened - some
	 * files may contain passwords and should not be world-readable.
	 * Note: dict_load_fp() nags about duplicate parameter settings.
	 */
	dict = dict_ht_open(dict_spec, O_CREAT | O_RDWR, 0);
	dict_register(dict_spec, dict);
	if ((fp = vstream_fopen(cf_file, O_RDONLY, 0)) == 0) {
	    if (errno != EACCES)
		msg_warn("open \"%s\" configuration \"%s\": %m",
			 dp->db_type, cf_file);
	    myfree(dict_spec);
	    return;
	}
	if (fstat(vstream_fileno(fp), &st) == 0 && !S_ISREG(st.st_mode)) {
	    msg_warn("open \"%s\" configuration \"%s\": not a regular file",
		     dp->db_type, cf_file);
	    myfree(dict_spec);
	    (void) vstream_fclose(fp);
	    return;
	}
	dict_load_fp(dict_spec, fp);
	if (vstream_fclose(fp)) {
	    msg_warn("read \"%s\" configuration \"%s\": %m",
		     dp->db_type, cf_file);
	    myfree(dict_spec);
	    return;
	}

	/*
	 * Remove all known database client parameters from this dictionary,
	 * then report the remaining ones as "unused". We use ad-hoc logging
	 * code, because a database client parameter namespace is unlike the
	 * parameter namespaces in main.cf or master.cf.
	 */
	for (cpp = dp->db_suffixes; *cpp; cpp++)
	    (void) dict_del(dict, *cpp);
	for (dir = DICT_SEQ_FUN_FIRST;
	     dict->sequence(dict, dir, &name, &value) == DICT_STAT_SUCCESS;
	     dir = DICT_SEQ_FUN_NEXT)
	    msg_warn("%s: unused parameter: %s=%s", dict_spec, name, value);
    }
    myfree(dict_spec);
}

/* pcf_register_dbms_helper - parse one possible database type:name */

static void pcf_register_dbms_helper(char *str_value,
         const char *(flag_parameter) (const char *, int, PCF_MASTER_ENT *),
				             PCF_MASTER_ENT *local_scope,
				             int recurse)
{
    const PCF_DBMS_INFO *dp;
    char   *db_type;
    char   *prefix;
    static VSTRING *candidate = 0;
    const char **cpp;
    char   *err;

    /*
     * Naive parsing. We don't really know if this substring specifies a
     * database or some other text.
     */
    while ((db_type = mystrtokq_cw(&str_value, CHARS_COMMA_SP, CHARS_BRACE,
	 local_scope ? pcf_get_master_path() : pcf_get_main_path())) != 0) {
	if (*db_type == CHARS_BRACE[0]) {
	    if ((err = extpar(&db_type, CHARS_BRACE, EXTPAR_FLAG_NONE)) != 0) {
		/* XXX Encapsulate this in pcf_warn() function. */
		if (local_scope)
		    msg_warn("%s:%s: %s", pcf_get_master_path(),
			     local_scope->name_space, err);
		else
		    msg_warn("%s: %s", pcf_get_main_path(), err);
		myfree(err);
	    }
	    if (recurse)
		pcf_register_dbms_helper(db_type, flag_parameter, local_scope,
					 recurse);
	    continue;
	}

	/*
	 * Skip over "proxy:" maptypes, to emulate the proxymap(8) server's
	 * behavior when opening a local database configuration file.
	 */
	while ((prefix = split_at(db_type, ':')) != 0
	       && strcmp(db_type, DICT_TYPE_PROXY) == 0)
	    db_type = prefix;

	if (prefix == 0)
	    continue;

	/*
	 * Look for database:prefix where the prefix is an absolute pathname.
	 * Then, report unknown database client configuration parameters.
	 * 
	 * XXX What about a pathname beginning with '.'? This supposedly is
	 * relative to the queue directory, which is the default directory
	 * for all Postfix daemon processes. This would also have to handle
	 * the case that the queue is not yet created.
	 */
	if (*prefix == '/') {
	    for (dp = pcf_dbms_info; dp->db_type != 0; dp++) {
		if (strcmp(db_type, dp->db_type) == 0) {
		    if (dp->db_class == PCF_DBMS_CLASS_CLIENT)
			pcf_check_dbms_client(dp, prefix);
		    break;
		}
	    }
	    continue;
	}

	/*
	 * Look for database:prefix where the prefix is not a pathname and
	 * the database is a known type. Synthesize candidate parameter names
	 * from the user-defined prefix and from the database-defined suffix
	 * list, and see if those parameters have a "name=value" entry in the
	 * local or global namespace.
	 */
	if (*prefix != '.') {
	    int     next_recurse = recurse;

	    if (*prefix == CHARS_BRACE[0]) {
		if ((err = extpar(&prefix, CHARS_BRACE, EXTPAR_FLAG_NONE)) != 0) {
		    /* XXX Encapsulate this in pcf_warn() function. */
		    if (local_scope)
			msg_warn("%s:%s: %s", pcf_get_master_path(),
				 local_scope->name_space, err);
		    else
			msg_warn("%s: %s", pcf_get_main_path(), err);
		    myfree(err);
		}
		for (dp = pcf_dbms_info; dp->db_type != 0; dp++) {
		    if (strcmp(db_type, dp->db_type) == 0) {
			if (dp->db_class == PCF_DBMS_CLASS_REGEX)
			    next_recurse = PCF_DBMS_NO_RECURSE;
			break;
		    }
		}
		pcf_register_dbms_helper(prefix, flag_parameter, local_scope,
					 next_recurse);
		continue;
	    } else {
		for (dp = pcf_dbms_info; dp->db_type != 0; dp++) {
		    if (strcmp(db_type, dp->db_type) == 0) {
			if (dp->db_class == PCF_DBMS_CLASS_CLIENT) {
			    for (cpp = dp->db_suffixes; *cpp; cpp++) {
				vstring_sprintf(candidate ? candidate :
					    (candidate = vstring_alloc(30)),
						"%s_%s", prefix, *cpp);
				flag_parameter(STR(candidate),
				  PCF_PARAM_FLAG_DBMS | PCF_PARAM_FLAG_USER,
					       local_scope);
			    }
			}
			break;
		    }
		}
	    }
	}
    }
}

/* pcf_register_dbms_parameters - look for database_type:prefix_name */

void    pcf_register_dbms_parameters(const char *param_value,
         const char *(flag_parameter) (const char *, int, PCF_MASTER_ENT *),
				             PCF_MASTER_ENT *local_scope)
{
    char   *bufp;
    static VSTRING *buffer = 0;

    /*
     * XXX This does not examine both sides of conditional macro expansion,
     * and may expand the "wrong" conditional macros. This is the best we can
     * do for legacy database configuration support.
     */
    if (buffer == 0)
	buffer = vstring_alloc(100);
    bufp = pcf_expand_parameter_value(buffer, PCF_SHOW_EVAL, param_value,
				      local_scope);
    pcf_register_dbms_helper(bufp, flag_parameter, local_scope, PCF_DBMS_RECURSE);
}

#endif