maidag.c
14.1 KB
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
/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 2007, 2008 Free Software Foundation, Inc.
GNU Mailutils is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GNU Mailutils is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Mailutils; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
MA 02110-1301 USA */
#include "maidag.h"
int multiple_delivery; /* Don't return errors when delivering to multiple
recipients */
int ex_quota_tempfail; /* Return temporary failure if mailbox quota is
exceeded. If this variable is not set, maidag
will return "service unavailable" */
int exit_code = EX_OK; /* Exit code to be used */
uid_t current_uid; /* Current user id */
char *quotadbname = NULL; /* Name of mailbox quota database */
char *quota_query = NULL; /* SQL query to retrieve mailbox quota */
char *sender_address = NULL;
char *progfile_pattern = NULL;
char *sieve_pattern = NULL;
int log_to_stderr = -1;
/* Debuggig options */
int debug_level; /* General debugging level */
int sieve_debug_flags; /* Sieve debugging flags */
int sieve_enable_log; /* Enables logging of executed Sieve actions */
char *message_id_header; /* Use the value of this header as message
identifier when logging Sieve actions */
/* For LMTP mode */
mu_m_server_t server;
int lmtp_mode;
char *lmtp_url_string;
int reuse_lmtp_address = 1;
char *lmtp_group = "mail";
const char *program_version = "maidag (" PACKAGE_STRING ")";
static char doc[] =
N_("GNU maildag -- the mail delivery agent")
"\v"
N_("Debug flags are:\n\
g - guimb stack traces\n\
t - sieve trace (MU_SIEVE_DEBUG_TRACE)\n\
i - sieve instructions trace (MU_SIEVE_DEBUG_INSTR)\n\
l - sieve action logs\n\
0-9 - Set maidag debugging level\n");
static char args_doc[] = N_("[recipient...]");
#define STDERR_OPTION 256
#define MESSAGE_ID_HEADER_OPTION 257
#define LMTP_OPTION 258
#define FOREGROUND_OPTION 260
static struct argp_option options[] =
{
{ "foreground", FOREGROUND_OPTION, 0, 0, N_("Remain in foreground."), 0 },
{ "inetd", 'i', 0, 0, N_("Run in inetd mode"), 0 },
{ "daemon", 'd', N_("NUMBER"), OPTION_ARG_OPTIONAL,
N_("Runs in daemon mode with a maximum of NUMBER children"), 0 },
{ "from", 'f', N_("EMAIL"), 0,
N_("Specify the sender's name") },
{ NULL, 'r', NULL, OPTION_ALIAS, NULL },
{ "sieve", 'S', N_("PATTERN"), 0,
N_("Set name pattern for user-defined Sieve mail filters"), 0 },
{ "message-id-header", MESSAGE_ID_HEADER_OPTION, N_("STRING"), 0,
N_("Identify messages by the value of this header when logging Sieve actions"), 0 },
#ifdef WITH_GUILE
{ "source", 's', N_("PATTERN"), 0,
N_("Set name pattern for user-defined Scheme mail filters"), 0 },
#endif
{ "lmtp", LMTP_OPTION, N_("URL"), OPTION_ARG_OPTIONAL,
N_("Operate in LMTP mode"), 0 },
{ "debug", 'x', N_("FLAGS"), 0,
N_("Enable debugging"), 0 },
{ "stderr", STDERR_OPTION, NULL, 0,
N_("Log to standard error"), 0 },
{ NULL, 0, NULL, 0, NULL, 0 }
};
static error_t parse_opt (int key, char *arg, struct argp_state *state);
static struct argp argp = {
options,
parse_opt,
args_doc,
doc,
NULL,
NULL, NULL
};
static const char *maidag_argp_capa[] = {
"auth",
"common",
"debug",
"license",
"logging",
"mailbox",
"locking",
"mailer",
NULL
};
#define D_DEFAULT "9,s"
static void
set_debug_flags (mu_debug_t debug, const char *arg)
{
while (*arg)
{
if (isdigit (*arg))
debug_level = strtoul (arg, (char**)&arg, 10);
else
for (; *arg && *arg != ','; arg++)
{
switch (*arg)
{
case 'g':
#ifdef WITH_GUILE
debug_guile = 1;
#endif
break;
case 't':
sieve_debug_flags |= MU_SIEVE_DEBUG_TRACE;
break;
case 'i':
sieve_debug_flags |= MU_SIEVE_DEBUG_INSTR;
break;
case 'l':
sieve_enable_log = 1;
break;
default:
mu_cfg_format_error (debug, MU_DEBUG_ERROR,
_("%c is not a valid debug flag"), *arg);
break;
}
}
if (*arg == ',')
arg++;
else if (*arg)
mu_cfg_format_error (debug, MU_DEBUG_ERROR,
_("expected comma, but found %c"), *arg);
}
}
static error_t
parse_opt (int key, char *arg, struct argp_state *state)
{
static struct mu_argp_node_list lst;
switch (key)
{
case 'd':
mu_argp_node_list_new (&lst, "mode", "daemon");
if (arg)
mu_argp_node_list_new (&lst, "max-children", arg);
break;
case 'i':
mu_argp_node_list_new (&lst, "mode", "inetd");
break;
case FOREGROUND_OPTION:
mu_argp_node_list_new (&lst, "foreground", "yes");
break;
case MESSAGE_ID_HEADER_OPTION:
mu_argp_node_list_new (&lst, "message-id-header", arg);
break;
case LMTP_OPTION:
mu_argp_node_list_new (&lst, "lmtp", "yes");
if (arg)
mu_argp_node_list_new (&lst, "listen", arg);
break;
case 'r':
case 'f':
if (sender_address != NULL)
{
argp_error (state, _("Multiple --from options"));
return EX_USAGE;
}
sender_address = arg;
break;
#ifdef WITH_GUILE
case 's':
mu_argp_node_list_new (&lst, "guile-filter", arg);
break;
#endif
case 'S':
mu_argp_node_list_new (&lst, "sieve-filter", arg);
break;
case 'x':
mu_argp_node_list_new (&lst, "debug", arg ? arg : D_DEFAULT);
break;
case STDERR_OPTION:
mu_argp_node_list_new (&lst, "stderr", "yes");
break;
case ARGP_KEY_INIT:
mu_argp_node_list_init (&lst);
break;
case ARGP_KEY_FINI:
mu_argp_node_list_finish (&lst, NULL, NULL);
break;
case ARGP_KEY_ERROR:
exit (EX_USAGE);
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
static int
cb_debug (mu_debug_t debug, void *data, char *arg)
{
set_debug_flags (debug, arg);
return 0;
}
struct mu_cfg_param maidag_cfg_param[] = {
{ "exit-multiple-delivery-success", mu_cfg_bool, &multiple_delivery, 0, NULL,
N_("In case of multiple delivery, exit with code 0 if at least one "
"delivery succeeded.") },
{ "exit-quota-tempfail", mu_cfg_bool, &ex_quota_tempfail, 0, NULL,
N_("Indicate temporary failure if the recipient is over his mail quota.")
},
#ifdef USE_DBM
{ "quota-db", mu_cfg_string, "adbname, 0, NULL,
N_("Name of DBM quota database file."),
N_("file") },
#endif
#ifdef USE_SQL
{ "quota-query", mu_cfg_string, "a_query, 0, NULL,
N_("SQL query to retrieve mailbox quota. This is deprecated, use "
"sql { ... } instead."),
N_("query") },
#endif
{ "sieve-filter", mu_cfg_string, &sieve_pattern, 0, NULL,
N_("File name or name pattern for Sieve filter file."),
N_("file-or-pattern") },
{ "message-id-header", mu_cfg_string, &message_id_header, 0, NULL,
N_("When logging Sieve actions, identify messages by the value of "
"this header."),
N_("name") },
#ifdef WITH_GUILE
{ "guile-filter", mu_cfg_string, &progfile_pattern, 0, NULL,
N_("File name or name pattern for Guile filter file."),
N_("file-or-pattern") },
#endif
{ "debug", mu_cfg_callback, NULL, 0, cb_debug,
N_("Set maidag debug level. Debug level consists of one or more "
"of the following letters:\n"
" g - guimb stack traces\n"
" t - sieve trace (MU_SIEVE_DEBUG_TRACE)\n"
" i - sieve instructions trace (MU_SIEVE_DEBUG_INSTR)\n"
" l - sieve action logs\n") },
{ "stderr", mu_cfg_bool, &log_to_stderr, 0, NULL,
N_("Log to stderr instead of syslog.") },
/* LMTP support */
{ "lmtp", mu_cfg_bool, &lmtp_mode, 0, NULL,
N_("Run in LMTP mode.") },
{ "group", mu_cfg_string, &lmtp_group, 0, NULL,
N_("In LMTP mode, change to this group after startup.") },
{ "listen", mu_cfg_string, &lmtp_url_string, 0, NULL,
N_("In LMTP mode, listen on the given URL. Valid URLs are:\n"
" tcp://<address: string>:<port: number> (note that port is "
"mandatory)\n"
" file://<socket-file-name>\n"
"or socket://<socket-file-name>"),
N_("url") },
{ "reuse-address", mu_cfg_bool, &reuse_lmtp_address, 0, NULL,
N_("Reuse existing address (LMTP mode). Default is \"yes\".") },
{ ".server", mu_cfg_section, NULL, 0, NULL,
N_("LMTP server configuration.") },
TCP_WRAPPERS_CONFIG
{ NULL }
};
/* Logging */
static int
_sieve_debug_printer (void *unused, const char *fmt, va_list ap)
{
mu_diag_vprintf (MU_DIAG_DEBUG, fmt, ap);
return 0;
}
static void
_sieve_action_log (void *user_name,
const mu_sieve_locus_t *locus, size_t msgno,
mu_message_t msg,
const char *action, const char *fmt, va_list ap)
{
int pfx = 0;
mu_debug_t debug;
mu_diag_get_debug (&debug);
mu_debug_set_locus (debug, locus->source_file, locus->source_line);
mu_diag_printf (MU_DIAG_NOTICE, _("(user %s) "), (char*) user_name);
if (message_id_header)
{
mu_header_t hdr = NULL;
char *val = NULL;
mu_message_get_header (msg, &hdr);
if (mu_header_aget_value (hdr, message_id_header, &val) == 0
|| mu_header_aget_value (hdr, MU_HEADER_MESSAGE_ID, &val) == 0)
{
pfx = 1;
mu_diag_printf (MU_DIAG_NOTICE, _("%s on msg %s"), action, val);
free (val);
}
}
if (!pfx)
{
size_t uid = 0;
mu_message_get_uid (msg, &uid);
mu_diag_printf (MU_DIAG_NOTICE, _("%s on msg uid %d"), action, uid);
}
if (fmt && strlen (fmt))
{
mu_diag_printf (MU_DIAG_NOTICE, "; ");
mu_diag_vprintf (MU_DIAG_NOTICE, fmt, ap);
}
mu_diag_printf (MU_DIAG_NOTICE, "\n");
mu_debug_set_locus (debug, NULL, 0);
}
static int
_sieve_parse_error (void *user_name, const char *filename, int lineno,
const char *fmt, va_list ap)
{
mu_debug_t debug;
mu_diag_get_debug (&debug);
if (filename)
mu_debug_set_locus (debug, filename, lineno);
mu_diag_printf (MU_DIAG_ERROR, _("(user %s) "), (char*) user_name);
mu_diag_vprintf (MU_DIAG_ERROR, fmt, ap);
mu_diag_printf (MU_DIAG_ERROR, "\n");
mu_debug_set_locus (debug, NULL, 0);
return 0;
}
int
sieve_test (struct mu_auth_data *auth, mu_mailbox_t mbx)
{
int rc = 1;
char *progfile;
if (!sieve_pattern)
return 1;
progfile = mu_expand_path_pattern (sieve_pattern, auth->name);
if (access (progfile, R_OK))
{
if (debug_level > 2)
mu_diag_output (MU_DIAG_DEBUG, _("Access to %s failed: %m"), progfile);
}
else
{
mu_sieve_machine_t mach;
rc = mu_sieve_machine_init (&mach, auth->name);
if (rc)
{
mu_error (_("Cannot initialize sieve machine: %s"),
mu_strerror (rc));
}
else
{
mu_sieve_set_debug (mach, _sieve_debug_printer);
mu_sieve_set_debug_level (mach, sieve_debug_flags);
mu_sieve_set_parse_error (mach, _sieve_parse_error);
if (sieve_enable_log)
mu_sieve_set_logger (mach, _sieve_action_log);
rc = mu_sieve_compile (mach, progfile);
if (rc == 0)
{
mu_attribute_t attr;
mu_message_t msg = NULL;
mu_mailbox_get_message (mbx, 1, &msg);
mu_message_get_attribute (msg, &attr);
mu_attribute_unset_deleted (attr);
if (switch_user_id (auth, 1) == 0)
{
chdir (auth->dir);
rc = mu_sieve_message (mach, msg);
if (rc == 0)
rc = mu_attribute_is_deleted (attr) == 0;
switch_user_id (auth, 0);
chdir ("/");
}
mu_sieve_machine_destroy (&mach);
}
}
}
free (progfile);
return rc;
}
int
main (int argc, char *argv[])
{
int arg_index;
/* Preparative work: close inherited fds, force a reasonable umask
and prepare a logging. */
close_fds ();
umask (0077);
/* Native Language Support */
MU_APP_INIT_NLS ();
/* Default locker settings */
mu_locker_set_default_flags (MU_LOCKER_PID|MU_LOCKER_RETRY,
mu_locker_assign);
mu_locker_set_default_retry_timeout (1);
mu_locker_set_default_retry_count (300);
/* Register needed modules */
MU_AUTH_REGISTER_ALL_MODULES ();
/* Register all supported mailbox and mailer formats */
mu_register_all_formats ();
mu_registrar_record (mu_smtp_record);
/* Register a special mailbox */
mu_registrar_record (mu_remote_mbox_record);
mu_gocs_register ("sieve", mu_sieve_module_init);
mu_tcpwrapper_cfg_init ();
mu_acl_cfg_init ();
mu_m_server_cfg_init ();
/* Parse command line */
mu_argp_init (program_version, NULL);
mu_m_server_create (&server, "GNU maidag");
mu_m_server_set_conn (server, lmtp_connection);
mu_m_server_set_prefork (server, mu_tcp_wrapper_prefork);
mu_m_server_set_mode (server, MODE_INTERACTIVE);
mu_m_server_set_max_children (server, 20);
mu_m_server_set_timeout (server, 600);
if (mu_app_init (&argp, maidag_argp_capa, maidag_cfg_param,
argc, argv, 0, &arg_index, server))
exit (EX_CONFIG);
current_uid = getuid ();
if (log_to_stderr == -1)
log_to_stderr = (getuid () != 0);
if (!log_to_stderr)
{
mu_debug_t debug;
openlog ("maidag", LOG_PID, log_facility);
mu_diag_get_debug (&debug);
mu_debug_set_print (debug, mu_diag_syslog_printer, NULL);
mu_debug_default_printer = mu_debug_syslog_printer;
}
argc -= arg_index;
argv += arg_index;
if (lmtp_mode)
{
if (argc)
{
mu_error (_("Too many arguments"));
return EX_USAGE;
}
return maidag_lmtp_server ();
}
else
{
if (current_uid)
{
static char *s_argv[2];
struct mu_auth_data *auth = mu_get_auth_by_uid (current_uid);
if (!current_uid)
{
mu_error (_("Cannot get username"));
return EX_UNAVAILABLE;
}
if (argc > 1 || (argc > 0 && strcmp (auth->name, argv[0])))
{
mu_error (_("Recipients given when running as non-root"));
return EX_USAGE;
}
s_argv[0] = auth->name;
argv = s_argv;
argc = 1;
}
return maidag_stdio_delivery (argc, argv);
}
}