summaryrefslogtreecommitdiff
path: root/sieve/sieve.c
blob: dc429a60e083bd8d6ff541ebc483e60c83ed423c (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
/* GNU Mailutils -- a suite of utilities for electronic mail
   Copyright (C) 1999-2003, 2005-2012, 2014-2016 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, see <http://www.gnu.org/licenses/>. */

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <syslog.h>
#include <sysexits.h>

#include <mailutils/io.h>
#include <mailutils/argcv.h>
#include <mailutils/sieve.h>
#include <mailutils/auth.h>
#include <mailutils/errno.h>
#include <mailutils/folder.h>
#include <mailutils/list.h>
#include <mailutils/mailbox.h>
#include <mailutils/util.h>
#include <mailutils/registrar.h>
#include <mailutils/stream.h>
#include <mailutils/nls.h>
#include <mailutils/tls.h>
#include <mailutils/cli.h>
#include <mailutils/mu_auth.h>

#define D_DEFAULT "TPt"

int keep_going;
int compile_only;
char *mbox_url;
int sieve_debug;
int verbose;
char *script;
int expression_option;
int dry_run;

static int sieve_print_locus = 1; /* Should the log messages include the
				     locus */
static int no_program_name;

static mu_list_t env_list;

static int
sieve_setenv (void *item, void *data)
{
  char *str = item;
  mu_sieve_machine_t mach = data;
  int rc = mu_sieve_set_environ (mach, str, str + strlen (str) + 1);
  if (rc)
    mu_error (_("can't set environment item %s: %s"),
	      str, mu_strerror (rc));
  return 0;
}


static void
modify_debug_flags (mu_debug_level_t set, mu_debug_level_t clr)
{
  mu_debug_level_t lev;
  
  mu_debug_get_category_level (mu_sieve_debug_handle, &lev);
  mu_debug_set_category_level (mu_sieve_debug_handle, (lev & ~clr) | set);
}

static void
set_debug_level (const char *arg)
{
  for (; *arg; arg++)
    {
      switch (*arg)
	{
	case 'T':
	  modify_debug_flags (MU_DEBUG_LEVEL_UPTO(MU_DEBUG_TRACE9),
			      MU_DEBUG_LEVEL_MASK(MU_DEBUG_ERROR));
	  break;

	case 'P':
	  modify_debug_flags (MU_DEBUG_LEVEL_MASK(MU_DEBUG_PROT), 0);
	  break;

	case 'g':
	  modify_debug_flags (MU_DEBUG_LEVEL_MASK(MU_DEBUG_TRACE1), 0);
	  break;

	case 't':
	  modify_debug_flags (MU_DEBUG_LEVEL_MASK(MU_DEBUG_TRACE4), 0);
	  break;
	  
	case 'i':
	  modify_debug_flags (MU_DEBUG_LEVEL_MASK(MU_DEBUG_TRACE9), 0);
	  break;
	  
	default:
	  mu_error (_("%c is not a valid debug flag"), *arg);
	}
    }
}

static void
cli_compile_and_dump (struct mu_parseopt *po, struct mu_option *opt,
		      char const *arg)
{
  compile_only = 2;
}

static void
cli_debug (struct mu_parseopt *po, struct mu_option *opt, char const *arg)
{
  set_debug_level (arg);
}

static void
cli_email (struct mu_parseopt *po, struct mu_option *opt, char const *arg)
{
  int rc = mu_set_user_email (arg);
  if (rc)
    mu_parseopt_error (po, _("invalid email: %s"), mu_strerror (rc));
}

static void
cli_env (struct mu_parseopt *po, struct mu_option *opt, char const *arg)
{
  char *p = strchr (arg, '=');
  if (p == NULL)
    mu_parseopt_error (po, _("malformed environment setting: %s"), arg);
  else
    {
      char *str;

      str = mu_strdup (arg);
      str[p - arg] = 0;
      if (!env_list)
	{
	  mu_list_create (&env_list);
	  mu_list_set_destroy_item (env_list, mu_list_free_item);
	}
      mu_list_append (env_list, str);
    }
}

static struct mu_option sieve_options[] = {
  { "dry-run", 'n', NULL, MU_OPTION_DEFAULT,
    N_("do not execute any actions, just print what would be done"),
    mu_c_bool, &dry_run },
  { "no-actions", 0, NULL, MU_OPTION_ALIAS },
  { "keep-going", 'k', NULL, MU_OPTION_DEFAULT,
    N_("keep on going if execution fails on a message"),
    mu_c_bool, &keep_going },
  { "compile-only", 'c', NULL, MU_OPTION_DEFAULT,
    N_("compile script and exit"),
    mu_c_bool, &compile_only },
  { "dump", 'D', NULL, MU_OPTION_DEFAULT,
    N_("compile script, dump disassembled sieve code to terminal and exit"),
    mu_c_string, NULL, cli_compile_and_dump },  
  { "mbox-url", 'f', N_("MBOX"), MU_OPTION_DEFAULT,
    N_("mailbox to sieve (defaults to user's mail spool)"),
    mu_c_string, &mbox_url },
  { "ticket", 't', N_("TICKET"), MU_OPTION_DEFAULT,
    N_("ticket file for user authentication"),
    mu_c_string, &mu_ticket_file },
  { "debug", 'd', N_("FLAGS"), MU_OPTION_ARG_OPTIONAL,
    N_("debug flags (defaults to \"" D_DEFAULT "\")"),
    mu_c_string, NULL, cli_debug, D_DEFAULT },
  { "verbose", 'v', NULL, MU_OPTION_DEFAULT,
    N_("log all actions"), 
    mu_c_bool, &verbose },
  { "line-info", 0, N_("BOOL"), MU_OPTION_DEFAULT,
    N_("print source location along with action logs (default)"),
    mu_c_bool, &sieve_print_locus },
  { "email", 'e', N_("ADDRESS"), MU_OPTION_DEFAULT,
    N_("override user email address"),
    mu_c_string, NULL, cli_email }, 
  { "expression", 'E', NULL, MU_OPTION_DEFAULT,
    N_("treat SCRIPT as Sieve program text"), 
    mu_c_bool, &expression_option },
  { "no-program-name", 0, NULL, MU_OPTION_DEFAULT,
    N_("do not prefix diagnostic messages with the program name"),
    mu_c_int, &no_program_name },
  { "environment", 0, N_("NAME=VALUE"), MU_OPTION_DEFAULT,
    N_("set sieve environment value"),
    mu_c_string, NULL, cli_env },
  MU_OPTION_END
}, *options[] = { sieve_options, NULL };

int
mu_compat_printer (void *data, mu_log_level_t level, const char *buf)
{
  fputs (buf, stderr);
  return 0;
}


static int 
cb_debug (void *data, mu_config_value_t *val)
{
  if (mu_cfg_assert_value_type (val, MU_CFG_STRING))
    return 1;
  set_debug_level (val->v.string);
  return 0;
}

static int
cb_email (void *data, mu_config_value_t *val)
{
  int rc;
  
  if (mu_cfg_assert_value_type (val, MU_CFG_STRING))
    return 1;
  rc = mu_set_user_email (val->v.string);
  if (rc)
    mu_error (_("invalid email: %s"), mu_strerror (rc));
  return rc;
}

static struct mu_cfg_param sieve_cfg_param[] = {
  { "keep-going", mu_c_bool, &keep_going, 0, NULL,
    N_("Do not abort if execution fails on a message.") },
  { "mbox-url", mu_c_string, &mbox_url, 0, NULL,
    N_("Mailbox to sieve (defaults to user's mail spool)."),
    N_("url") },
  { "ticket", mu_c_string, &mu_ticket_file, 0, NULL,
    N_("Ticket file for user authentication."),
    N_("ticket") },
  { "debug", mu_cfg_callback, NULL, 0, cb_debug,
    N_("Debug flags.  Argument consists of one or more of the following "
       "flags:\n"
       "   g - main parser traces\n"
       "   T - mailutils traces (sieve.trace9)\n"
       "   P - network protocols (sieve.prot)\n"
       "   t - sieve trace (MU_SIEVE_DEBUG_TRACE)\n"
       "   i - sieve instructions trace (MU_SIEVE_DEBUG_INSTR)."),
    N_("arg: string") },
  { "verbose", mu_c_bool, &verbose, 0, NULL,
    N_("Log all executed actions.") },
  { "line-info", mu_c_bool, &sieve_print_locus, 0, NULL,
    N_("Print source locations along with action logs (default).") },
  { "email", mu_cfg_callback, NULL, 0, cb_email,
    N_("Set user email address."),
    N_("arg: string") },
  { NULL }
};


static char *sieve_capa[] = {
  "debug",
  "mailbox",
  "locking",
  "logging",
  "mailer",
  "sieve",
  NULL
};

static struct mu_cli_setup cli = {
  options,
  sieve_cfg_param,
  N_("GNU sieve -- a mail filtering tool."),
  "SCRIPT",
  NULL,
  N_("Sieve-specific debug levels:\n\
\n\
  trace1  -  print parse tree before optimization\n\
  trace2  -  print parse tree after optimization\n\
  trace3  -  print parser traces\n\
  trace4  -  print tests and actions being executed\n\
  trace9  -  print each Sieve instruction being executed\n\
\n\
Compatibility debug flags:\n\
  g - main parser traces\n\
  T - mailutils traces (same as --debug-level=sieve.trace0-trace1)\n\
  P - network protocols (same as --debug-level=sieve.=prot)\n\
  t - sieve trace (same as --debug-level=sieve.=trace4)\n\
  i - sieve instructions trace (same as --debug-level=sieve.=trace9)\n")
};

static void
_sieve_action_log (mu_sieve_machine_t mach,
		   const char *action, const char *fmt, va_list ap)
{
  size_t uid = 0;
  mu_message_t msg;
  mu_stream_t stream;

  mu_sieve_get_diag_stream (mach, &stream);
  msg = mu_sieve_get_message (mach);
  
  mu_message_get_uid (msg, &uid);
  mu_stream_printf (stream, "\033s<%d>\033%c<%d>", MU_LOG_NOTICE,
		    sieve_print_locus ? 'O' : 'X', MU_LOGMODE_LOCUS);
  mu_stream_printf (stream, _("%s on msg uid %lu"),
		    action, (unsigned long) uid);
  
  if (fmt && strlen (fmt))
    {
      mu_stream_printf (stream, ": ");
      mu_stream_vprintf (stream, fmt, ap);
    }
  mu_stream_printf (stream, "\n");

  mu_stream_unref (stream);
}

static int
sieve_message (mu_sieve_machine_t mach)
{
  int rc;
  mu_stream_t instr;
  mu_message_t msg;
  mu_attribute_t attr;

  rc = mu_stdio_stream_create (&instr, MU_STDIN_FD, MU_STREAM_SEEK);
  if (rc)
    {
      mu_error (_("cannot create stream: %s"), mu_strerror (rc));
      return EX_SOFTWARE;
    }
  rc = mu_stream_to_message (instr, &msg);
  mu_stream_unref (instr);
  if (rc)
    {
      mu_error (_("cannot create message from stream: %s"),
		mu_strerror (rc));
      return EX_SOFTWARE;
    }
  mu_message_get_attribute (msg, &attr);
  mu_attribute_unset_deleted (attr);
  rc = mu_sieve_message (mach, msg);
  if (rc)
    /* FIXME: switch (rc)...*/
    return EX_SOFTWARE;

  return mu_attribute_is_deleted (attr) ? 1 : EX_OK;
}

static int
sieve_mailbox (mu_sieve_machine_t mach)
{
  int rc;
  mu_mailbox_t mbox = NULL;
  
  /* Create and open the mailbox. */
  if ((rc = mu_mailbox_create_default (&mbox, mbox_url)) != 0)
    {
      if (mbox)
	mu_error (_("could not create mailbox `%s': %s"),
		  mbox_url, mu_strerror (rc));
      else
	mu_error (_("could not create default mailbox: %s"),
		  mu_strerror (rc));
      goto cleanup;
    }

  /* Open the mailbox read-only if we aren't going to modify it. */
  if (mu_sieve_is_dry_run (mach))
    rc = mu_mailbox_open (mbox, MU_STREAM_READ);
  else
    rc = mu_mailbox_open (mbox, MU_STREAM_RDWR);
  
  if (rc != 0)
    {
      if (mbox)
	{
	  mu_url_t url = NULL;

	  mu_mailbox_get_url (mbox, &url);
	  mu_error (_("cannot open mailbox %s: %s"),
		    mu_url_to_string (url), mu_strerror (rc));
	}
      else
	mu_error (_("cannot open default mailbox: %s"),
		  mu_strerror (rc));
      mu_mailbox_destroy (&mbox);
      goto cleanup;
    }
  
  /* Process the mailbox */
  rc = mu_sieve_mailbox (mach, mbox);
  
 cleanup:
  if (mbox && !dry_run)
    {
      int e;
      
      /* A message won't be marked deleted unless the script executed
         succesfully on it, so we always do an expunge, it will delete
         any messages that were marked DELETED even if execution failed
         on a later message. */
      if ((e = mu_mailbox_expunge (mbox)) != 0)
	{
	  if (mbox)
	    mu_error (_("expunge on mailbox `%s' failed: %s"),
		      mbox_url, mu_strerror (e));
	  else
	    mu_error (_("expunge on default mailbox failed: %s"),
		      mu_strerror (e));
	}
      
      if (e && !rc)
	rc = e;
    }
  
  mu_sieve_machine_destroy (&mach);
  mu_mailbox_close (mbox);
  mu_mailbox_destroy (&mbox);
  /* FIXME: switch (rc) ... */
  return rc ? EX_SOFTWARE : EX_OK;
}

int
main (int argc, char *argv[])
{
  mu_sieve_machine_t mach;
  int rc;

  /* Native Language Support */
  MU_APP_INIT_NLS ();

  mu_auth_register_module (&mu_auth_tls_module);
  mu_cli_capa_register (&mu_cli_capa_sieve);
  mu_sieve_debug_init ();
  
  mu_register_all_formats ();

  mu_cli (argc, argv, &cli, sieve_capa, NULL, &argc, &argv);
  if (dry_run)
    verbose++;

  if (no_program_name)
    {
      mu_stream_t errstr;

      mu_log_tag = NULL;
      rc = mu_stdstream_strerr_create (&errstr, MU_STRERR_STDERR, 0, 0,
				       NULL, NULL);
      if (rc == 0)
        {
          mu_stream_destroy (&mu_strerr);
          mu_strerr = errstr;
        }
    }
  
  if (argc == 0)
    {
      mu_error (_("script must be specified"));
      exit (EX_USAGE);
    }
  else if (argc == 1)
    {
      script = mu_tilde_expansion (argv[0], MU_HIERARCHY_DELIMITER, NULL);
    }
  else
    {
      mu_error (_("only one SCRIPT can be specified"));
      exit (EX_USAGE);
    }

  /* Sieve interpreter setup. */
  rc = mu_sieve_machine_create (&mach);
  if (rc)
    {
      mu_error (_("cannot initialize sieve machine: %s"), mu_strerror (rc));
      return EX_SOFTWARE;
    }

  sieve_setenv ("location=MS", mach);
  sieve_setenv ("phase=post", mach);
  mu_list_foreach (env_list, sieve_setenv, mach);
  mu_list_destroy (&env_list);
    
  if (verbose)
    mu_sieve_set_logger (mach, _sieve_action_log);

  if (expression_option)
    rc = mu_sieve_compile_buffer (mach, script, strlen (script),
				  "stdin", 1);
  else
    rc = mu_sieve_compile (mach, script);
  if (rc)
    return EX_CONFIG;

  /* We can finish if it's only a compilation check. */
  if (compile_only)
    {
      if (compile_only == 2)
	{
	  mu_sieve_set_dbg_stream (mach, mu_strout);
	  mu_sieve_disass (mach);
	}
      return EX_OK;
    }

  mu_sieve_set_dry_run (mach, dry_run);

  if (mbox_url && strcmp (mbox_url, "-") == 0)
    rc = sieve_message (mach);
  else
    rc = sieve_mailbox (mach);

  return rc;
}

Return to:

Send suggestions and report system problems to the System administrator.