masqmail

annotate src/masqmail.c @ 387:a408411ff8df

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Added a glob-pattern aliasing facility. One use-case is virtual hosting another catch-all maildrops, but you may use it as a more flexible aliasing mechanism as well.
author markus schnalke <meillo@marmaro.de>
date Sat, 18 Feb 2012 12:35:12 +0100
parents b27f66555ba8
children cdd16614c1f5
rev   line source
meillo@367 1 /*
meillo@367 2 ** MasqMail
meillo@367 3 ** Copyright (C) 1999-2001 Oliver Kurth
meillo@367 4 ** Copyright (C) 2010 markus schnalke <meillo@marmaro.de>
meillo@367 5 **
meillo@367 6 ** This program is free software; you can redistribute it and/or modify
meillo@367 7 ** it under the terms of the GNU General Public License as published by
meillo@367 8 ** the Free Software Foundation; either version 2 of the License, or
meillo@367 9 ** (at your option) any later version.
meillo@367 10 **
meillo@367 11 ** This program is distributed in the hope that it will be useful,
meillo@367 12 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
meillo@367 13 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
meillo@367 14 ** GNU General Public License for more details.
meillo@367 15 **
meillo@367 16 ** You should have received a copy of the GNU General Public License
meillo@367 17 ** along with this program; if not, write to the Free Software
meillo@367 18 ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
meillo@0 19 */
meillo@0 20
meillo@0 21 #include <stdio.h>
meillo@0 22 #include <errno.h>
meillo@0 23 #include <stdlib.h>
meillo@0 24 #include <string.h>
meillo@0 25 #include <unistd.h>
meillo@0 26 #include <sys/types.h>
meillo@0 27 #include <sys/socket.h>
meillo@0 28 #include <sys/time.h>
meillo@0 29 #include <netinet/in.h>
meillo@0 30 #include <netdb.h>
meillo@0 31 #include <syslog.h>
meillo@0 32 #include <signal.h>
meillo@0 33
meillo@0 34 #include <glib.h>
meillo@0 35
meillo@0 36 #include "masqmail.h"
meillo@0 37
meillo@367 38 /*
meillo@367 39 ** mutually exclusive modes. Note that there is no 'queue daemon' mode.
meillo@367 40 ** It, as well as the distinction beween the two (non exclusive) daemon
meillo@367 41 ** (queue and listen) modes, is handled by flags.
meillo@367 42 */
meillo@281 43 enum mta_mode {
meillo@281 44 MODE_NONE = 0, /* to check if a mode was set */
meillo@281 45 MODE_ACCEPT, /* accept message on stdin (fallback mode) */
meillo@10 46 MODE_DAEMON, /* run as daemon */
meillo@10 47 MODE_RUNQUEUE, /* single queue run, online or offline */
meillo@10 48 MODE_SMTP, /* accept SMTP on stdin */
meillo@10 49 MODE_LIST, /* list queue */
meillo@10 50 MODE_MCMD, /* do queue manipulation */
meillo@10 51 MODE_VERSION, /* show version */
meillo@10 52 MODE_BI, /* fake ;-) */
meillo@281 53 };
meillo@281 54 enum mta_mode mta_mode = MODE_NONE;
meillo@0 55
meillo@0 56 char *pidfile = NULL;
meillo@0 57 volatile int sigterm_in_progress = 0;
meillo@0 58
meillo@10 59 static void
meillo@10 60 sigterm_handler(int sig)
meillo@0 61 {
meillo@10 62 if (sigterm_in_progress)
meillo@10 63 raise(sig);
meillo@10 64 sigterm_in_progress = 1;
meillo@0 65
meillo@10 66 if (pidfile) {
meillo@331 67 uid_t uid = geteuid();
meillo@331 68 if (seteuid(0) != 0) {
meillo@331 69 logwrite(LOG_ALERT, "sigterm_handler: could not set euid to %d: %s\n", 0, strerror(errno));
meillo@331 70 }
meillo@10 71 if (unlink(pidfile) != 0)
meillo@10 72 logwrite(LOG_WARNING, "could not delete pid file %s: %s\n", pidfile, strerror(errno));
meillo@10 73 seteuid(uid); /* we exit anyway after this, just to be sure */
meillo@10 74 }
meillo@0 75
meillo@10 76 signal(sig, SIG_DFL);
meillo@10 77 raise(sig);
meillo@0 78 }
meillo@0 79
meillo@249 80 /*
meillo@367 81 ** argv: the original argv
meillo@367 82 ** argp: number of arg (may get modified!)
meillo@367 83 ** cp: pointing to the char after the option
meillo@367 84 ** e.g. `-d 6' `-d6'
meillo@367 85 ** ^ ^
meillo@249 86 */
meillo@10 87 gchar*
meillo@366 88 get_optarg(char *argv[], gint *argp, char *cp)
meillo@0 89 {
meillo@249 90 if (*cp) {
meillo@249 91 /* this kind: -xval */
meillo@249 92 return cp;
meillo@249 93 }
meillo@249 94 cp = argv[*argp+1];
meillo@249 95 if (cp && (*cp != '-')) {
meillo@249 96 /* this kind: -x val */
meillo@249 97 (*argp)++;
meillo@249 98 return cp;
meillo@10 99 }
meillo@10 100 return NULL;
meillo@0 101 }
meillo@0 102
meillo@10 103 gboolean
meillo@366 104 write_pidfile(gchar *name)
meillo@0 105 {
meillo@10 106 FILE *fptr;
meillo@0 107
meillo@10 108 if ((fptr = fopen(name, "wt"))) {
meillo@10 109 fprintf(fptr, "%d\n", getpid());
meillo@10 110 fclose(fptr);
meillo@10 111 pidfile = strdup(name);
meillo@10 112 return TRUE;
meillo@10 113 }
meillo@10 114 logwrite(LOG_WARNING, "could not write pid file: %s\n", strerror(errno));
meillo@10 115 return FALSE;
meillo@10 116 }
meillo@0 117
meillo@264 118 /* on -bd or if -q has an argument */
meillo@10 119 static void
meillo@10 120 mode_daemon(gboolean do_listen, gint queue_interval, char *argv[])
meillo@10 121 {
meillo@10 122 guint pid;
meillo@0 123
meillo@10 124 /* daemon */
meillo@10 125 if (!conf.run_as_user) {
meillo@10 126 if ((conf.orig_uid != 0) && (conf.orig_uid != conf.mail_uid)) {
meillo@10 127 fprintf(stderr, "must be root or %s for daemon.\n", DEF_MAIL_USER);
meillo@262 128 exit(1);
meillo@10 129 }
meillo@10 130 }
meillo@0 131
meillo@74 132 /* reparent to init only if init is not already the parent */
meillo@74 133 if (getppid() != 1) {
meillo@74 134 if ((pid = fork()) > 0) {
meillo@262 135 exit(0);
meillo@74 136 } else if (pid < 0) {
meillo@208 137 logwrite(LOG_ALERT, "could not fork!\n");
meillo@262 138 exit(1);
meillo@74 139 }
meillo@10 140 }
meillo@0 141
meillo@10 142 signal(SIGTERM, sigterm_handler);
meillo@10 143 write_pidfile(PIDFILEDIR "/masqmail.pid");
meillo@0 144
meillo@10 145 conf.do_verbose = FALSE;
meillo@10 146
meillo@367 147 /*
meillo@367 148 ** closing and reopening the log ensures that it is open afterwards
meillo@367 149 ** because it is possible that the log is assigned to fd 1 and gets
meillo@367 150 ** thus closes by fclose(stdout). Similar for the debugfile.
meillo@72 151 */
meillo@72 152 logclose();
meillo@10 153 fclose(stdin);
meillo@10 154 fclose(stdout);
meillo@10 155 fclose(stderr);
meillo@72 156 logopen();
meillo@10 157
meillo@208 158 logwrite(LOG_NOTICE, "%s %s daemon starting\n", PACKAGE, VERSION);
meillo@10 159 listen_port(do_listen ? conf.listen_addresses : NULL, queue_interval, argv);
meillo@0 160 }
meillo@0 161
meillo@264 162 /* -bs or called as smtpd or in.smtpd */
meillo@10 163 static void
meillo@10 164 mode_smtp()
meillo@0 165 {
meillo@10 166 /* accept smtp message on stdin */
meillo@10 167 /* write responses to stderr. */
meillo@0 168
meillo@10 169 struct sockaddr_in saddr;
meillo@10 170 gchar *peername = NULL;
meillo@10 171 int dummy = sizeof(saddr);
meillo@0 172
meillo@10 173 conf.do_verbose = FALSE;
meillo@0 174
meillo@10 175 if (!conf.run_as_user) {
meillo@331 176 set_euidgid(conf.orig_uid, conf.orig_gid, NULL, NULL);
meillo@10 177 }
meillo@0 178
meillo@10 179 DEBUG(5) debugf("accepting smtp message on stdin\n");
meillo@0 180
meillo@10 181 if (getpeername(0, (struct sockaddr *) (&saddr), &dummy) == 0) {
meillo@10 182 peername = g_strdup(inet_ntoa(saddr.sin_addr));
meillo@10 183 } else if (errno != ENOTSOCK)
meillo@262 184 exit(1);
meillo@0 185
meillo@10 186 smtp_in(stdin, stderr, peername, NULL);
meillo@0 187 }
meillo@0 188
meillo@264 189 /* default mode if address args or -t is specified, or called as rmail */
meillo@10 190 static void
meillo@367 191 mode_accept(address *return_path, gchar *full_sender_name, guint accept_flags,
meillo@367 192 char **addresses, int addr_cnt)
meillo@0 193 {
meillo@10 194 /* accept message on stdin */
meillo@10 195 accept_error err;
meillo@10 196 message *msg = create_message();
meillo@10 197 gint i;
meillo@266 198 pid_t pid;
meillo@0 199
meillo@83 200 if (return_path && !is_privileged_user(conf.orig_uid)) {
meillo@96 201 fprintf(stderr, "must be root, %s or in group %s for setting return path.\n", DEF_MAIL_USER, DEF_MAIL_GROUP);
meillo@262 202 exit(1);
meillo@10 203 }
meillo@0 204
meillo@10 205 if (!conf.run_as_user) {
meillo@331 206 set_euidgid(conf.orig_uid, conf.orig_gid, NULL, NULL);
meillo@10 207 }
meillo@0 208
meillo@10 209 DEBUG(5) debugf("accepting message on stdin\n");
meillo@0 210
meillo@10 211 msg->received_prot = PROT_LOCAL;
meillo@276 212
meillo@276 213 /* warn if -t option and cmdline addr args */
meillo@276 214 if (addr_cnt && (accept_flags & ACC_RCPT_FROM_HEAD)) {
meillo@276 215 logwrite(LOG_ALERT, "command line address arguments are now *added* to the mail header\\\n");
meillo@276 216 logwrite(LOG_ALERT, " recipient addresses (instead of substracted) when -t is given.\\\n");
meillo@276 217 logwrite(LOG_ALERT, " this changed with version 0.3.1\n");
meillo@276 218 }
meillo@276 219
meillo@10 220 for (i = 0; i < addr_cnt; i++) {
meillo@266 221 if (addresses[i][0] == '|') {
meillo@10 222 logwrite(LOG_ALERT, "no pipe allowed as recipient address: %s\n", addresses[i]);
meillo@276 223 /* should we better ignore this one addr? */
meillo@262 224 exit(1);
meillo@10 225 }
meillo@264 226 msg->rcpt_list = g_list_append(msg->rcpt_list, create_address_qualified(addresses[i], TRUE, conf.host_name));
meillo@10 227 }
meillo@0 228
meillo@10 229 /* -f option */
meillo@10 230 msg->return_path = return_path;
meillo@0 231
meillo@10 232 /* -F option */
meillo@10 233 msg->full_sender_name = full_sender_name;
meillo@0 234
meillo@266 235 err = accept_message(stdin, msg, accept_flags);
meillo@0 236
meillo@266 237 switch (err) {
meillo@266 238 case AERR_OK:
meillo@266 239 /* to continue; all other cases exit */
meillo@266 240 break;
meillo@266 241 case AERR_EOF:
meillo@266 242 fprintf(stderr, "unexpected EOF.\n");
meillo@266 243 exit(1);
meillo@266 244 case AERR_NORCPT:
meillo@266 245 fprintf(stderr, "no recipients.\n");
meillo@266 246 exit(1);
meillo@266 247 case AERR_SIZE:
meillo@266 248 fprintf(stderr, "max message size exceeded.\n");
meillo@266 249 exit(1);
meillo@266 250 default:
meillo@266 251 /* should never happen: */
meillo@266 252 fprintf(stderr, "Unknown error (%d)\r\n", err);
meillo@266 253 exit(1);
meillo@266 254 }
meillo@266 255
meillo@266 256 if (!spool_write(msg, TRUE)) {
meillo@266 257 fprintf(stderr, "Could not write spool file\n");
meillo@266 258 exit(1);
meillo@266 259 }
meillo@266 260
meillo@267 261 /* here the mail is queued and thus in our responsibility */
meillo@266 262 logwrite(LOG_NOTICE, "%s <= %s with %s\n", msg->uid, addr_string(msg->return_path), prot_names[PROT_LOCAL]);
meillo@266 263
meillo@266 264 if (conf.do_queue) {
meillo@266 265 /* we're finished as we only need to queue it */
meillo@266 266 return;
meillo@266 267 }
meillo@266 268
meillo@266 269 /* deliver at once */
meillo@266 270 if ((pid = fork()) < 0) {
meillo@266 271 logwrite(LOG_ALERT, "could not fork for delivery, id = %s\n", msg->uid);
meillo@266 272 } else if (pid == 0) {
meillo@266 273 conf.do_verbose = FALSE;
meillo@266 274 fclose(stdin);
meillo@266 275 fclose(stdout);
meillo@266 276 fclose(stderr);
meillo@266 277 if (deliver(msg)) {
meillo@266 278 exit(0);
meillo@10 279 } else {
meillo@267 280 /*
meillo@367 281 ** TODO: Should we really fail here? Because the
meillo@367 282 ** mail is queued already. If we fail the client
meillo@367 283 ** might submit it again. If at-once-delivery
meillo@367 284 ** is seen as an additional best-effort service,
meillo@367 285 ** then we should still exit successful here.
meillo@267 286 */
meillo@262 287 exit(1);
meillo@10 288 }
meillo@0 289 }
meillo@0 290 }
meillo@0 291
meillo@250 292 /*
meillo@367 293 ** if -Mrm is given
meillo@367 294 **
meillo@367 295 ** currently only the `rm' command is supported
meillo@367 296 ** until this changes, we don't need any facility for further commands
meillo@367 297 ** return success if at least one message had been deleted
meillo@250 298 */
meillo@250 299 static int
meillo@366 300 manipulate_queue(char *cmd, char *id[])
meillo@250 301 {
meillo@250 302 gboolean ok = FALSE;
meillo@250 303
meillo@250 304 if (strcmp(cmd, "rm") != 0) {
meillo@250 305 fprintf(stderr, "unknown command %s\n", cmd);
meillo@250 306 return FALSE;
meillo@250 307 }
meillo@250 308
meillo@250 309 set_euidgid(conf.mail_uid, conf.mail_gid, NULL, NULL);
meillo@250 310
meillo@250 311 /* privileged users may delete any mail */
meillo@250 312 if (is_privileged_user(conf.orig_uid)) {
meillo@250 313 for (; *id; id++) {
meillo@250 314 fprintf(stderr, "id: %s\n", *id);
meillo@250 315 if (queue_delete(*id)) {
meillo@250 316 ok = TRUE;
meillo@250 317 }
meillo@250 318 }
meillo@250 319 return ok;
meillo@250 320 }
meillo@250 321
meillo@250 322 struct passwd *pw = getpwuid(conf.orig_uid);
meillo@250 323 if (!pw) {
meillo@250 324 fprintf(stderr, "could not find a passwd entry for uid %d: %s\n",
meillo@250 325 conf.orig_uid, strerror(errno));
meillo@250 326 return FALSE;
meillo@250 327 }
meillo@250 328
meillo@250 329 /* non-privileged users may only delete their own messages */
meillo@250 330 for (; *id; id++) {
meillo@349 331 message *msg = msg_spool_read(*id);
meillo@250 332
meillo@250 333 fprintf(stderr, "id: %s\n", *id);
meillo@250 334
meillo@250 335 if (!msg->ident) {
meillo@250 336 fprintf(stderr, "message %s does not have an ident\n", *id);
meillo@250 337 continue;
meillo@250 338 }
meillo@250 339 if (strcmp(pw->pw_name, msg->ident) != 0) {
meillo@250 340 fprintf(stderr, "you do not own message id %s\n", *id);
meillo@250 341 continue;
meillo@250 342 }
meillo@250 343
meillo@378 344 if (msg->received_host || (msg->received_prot != PROT_LOCAL)) {
meillo@378 345 fprintf(stderr, "message %s was not received locally\n", *id);
meillo@250 346 continue;
meillo@250 347 }
meillo@250 348
meillo@250 349 ok = queue_delete(*id);
meillo@250 350 }
meillo@250 351 return ok;
meillo@250 352 }
meillo@250 353
meillo@264 354 /* -qo, -q (without argument), or called as runq */
meillo@251 355 static int
meillo@366 356 run_queue(gboolean do_runq, gboolean do_runq_online, char *route_name)
meillo@251 357 {
meillo@251 358 int ret;
meillo@251 359
meillo@251 360 /* queue runs */
meillo@251 361 set_identity(conf.orig_uid, "queue run");
meillo@251 362
meillo@251 363 if (do_runq) {
meillo@251 364 ret = queue_run();
meillo@251 365 }
meillo@251 366
meillo@251 367 if (do_runq_online) {
meillo@251 368 if (route_name) {
meillo@310 369 conf.online_query = g_strdup_printf("/bin/echo %s", route_name);
meillo@251 370 }
meillo@367 371 /*
meillo@367 372 ** TODO: change behavior of `-qo without argument'?
meillo@367 373 ** Because that behavior is included in -q.
meillo@367 374 */
meillo@251 375 ret = queue_run_online();
meillo@251 376 }
meillo@251 377 return ret;
meillo@251 378 }
meillo@251 379
meillo@264 380 /* -bV or default mode if neither addr arg nor -t */
meillo@261 381 static void
meillo@261 382 mode_version(void)
meillo@261 383 {
meillo@261 384 gchar *with_resolver = "";
meillo@261 385 gchar *with_auth = "";
meillo@261 386
meillo@261 387 #ifdef ENABLE_RESOLVER
meillo@261 388 with_resolver = " +resolver";
meillo@261 389 #endif
meillo@261 390 #ifdef ENABLE_AUTH
meillo@261 391 with_auth = " +auth";
meillo@261 392 #endif
meillo@261 393
meillo@378 394 printf("%s %s%s%s\n", PACKAGE, VERSION, with_resolver, with_auth);
meillo@261 395 }
meillo@261 396
meillo@281 397 void
meillo@281 398 set_mode(enum mta_mode mode)
meillo@281 399 {
meillo@281 400 if (mta_mode && mta_mode!=mode) {
meillo@281 401 fprintf(stderr, "operation mode was already specified (%d vs. %d)\n", mta_mode, mode);
meillo@281 402 exit(1);
meillo@281 403 }
meillo@281 404
meillo@281 405 mta_mode = mode;
meillo@281 406 return;
meillo@281 407 }
meillo@281 408
meillo@0 409 int
meillo@0 410 main(int argc, char *argv[])
meillo@0 411 {
meillo@251 412 gchar *progname;
meillo@366 413 char *opt;
meillo@249 414 gint arg;
meillo@0 415
meillo@10 416 gboolean do_listen = FALSE;
meillo@10 417 gboolean do_runq = FALSE;
meillo@10 418 gboolean do_runq_online = FALSE;
meillo@10 419 gboolean do_queue = FALSE;
meillo@10 420 gint queue_interval = 0;
meillo@251 421 gchar *M_cmd = NULL;
meillo@10 422 gboolean opt_t = FALSE;
meillo@10 423 gboolean opt_i = FALSE;
meillo@251 424 gchar *conf_file = CONF_FILE;
meillo@10 425 gchar *route_name = NULL;
meillo@10 426 gchar *f_address = NULL;
meillo@251 427 address *return_path = NULL; /* may be changed by -f option */
meillo@10 428 gchar *full_sender_name = NULL;
meillo@251 429 gboolean do_verbose = FALSE;
meillo@251 430 gint debug_level = -1;
meillo@0 431
meillo@260 432 /* strip the path part */
meillo@261 433 progname = strrchr(argv[0], '/');
meillo@261 434 progname = (progname) ? progname+1 : argv[0];
meillo@0 435
meillo@10 436 if (strcmp(progname, "mailq") == 0) {
meillo@10 437 mta_mode = MODE_LIST;
meillo@10 438 } else if (strcmp(progname, "mailrm") == 0) {
meillo@10 439 mta_mode = MODE_MCMD;
meillo@10 440 M_cmd = "rm";
meillo@284 441 } else if (strcmp(progname, "newaliases") == 0) {
meillo@284 442 mta_mode = MODE_BI;
meillo@10 443 } else if (strcmp(progname, "rmail") == 0) {
meillo@367 444 /*
meillo@367 445 ** the `rmail' alias should probably be removed now
meillo@367 446 ** that we have the rmail script. But let's keep it
meillo@367 447 ** for some while for compatibility. 2010-06-19
meillo@367 448 */
meillo@10 449 mta_mode = MODE_ACCEPT;
meillo@10 450 opt_i = TRUE;
meillo@284 451 } else if (strcmp(progname, "runq") == 0) {
meillo@284 452 mta_mode = MODE_RUNQUEUE;
meillo@284 453 do_runq = TRUE;
meillo@284 454 } else if (strcmp(progname, "smtpd") == 0
meillo@284 455 || strcmp(progname, "in.smtpd") == 0) {
meillo@10 456 mta_mode = MODE_SMTP;
meillo@10 457 }
meillo@0 458
meillo@10 459 /* parse cmd line */
meillo@249 460 for (arg=1; arg<argc && argv[arg][0]=='-'; arg++) {
meillo@251 461 opt = argv[arg] + 1; /* points to the char after the dash */
meillo@10 462
meillo@249 463 if (strcmp(opt, "-") == 0) {
meillo@249 464 /* everything after `--' are address arguments */
meillo@249 465 arg++;
meillo@249 466 break;
meillo@10 467
meillo@278 468 } else if (strcmp(opt, "bm") == 0) {
meillo@281 469 set_mode(MODE_ACCEPT);
meillo@278 470
meillo@249 471 } else if (strcmp(opt, "bd") == 0) {
meillo@281 472 set_mode(MODE_DAEMON);
meillo@249 473 do_listen = TRUE;
meillo@249 474
meillo@249 475 } else if (strcmp(opt, "bi") == 0) {
meillo@281 476 set_mode(MODE_BI);
meillo@249 477
meillo@249 478 } else if (strcmp(opt, "bs") == 0) {
meillo@281 479 set_mode(MODE_SMTP);
meillo@249 480
meillo@249 481 } else if (strcmp(opt, "bp") == 0) {
meillo@281 482 set_mode(MODE_LIST);
meillo@249 483
meillo@249 484 } else if (strcmp(opt, "bV") == 0) {
meillo@281 485 set_mode(MODE_VERSION);
meillo@249 486
meillo@249 487 } else if (strncmp(opt, "B", 1) == 0) {
meillo@249 488 /* we ignore this and throw the argument away */
meillo@249 489 get_optarg(argv, &arg, opt+1);
meillo@249 490
meillo@249 491 } else if (strncmp(opt, "C", 1) == 0) {
meillo@251 492 conf_file = get_optarg(argv, &arg, opt+1);
meillo@251 493 if (!conf_file) {
meillo@249 494 fprintf(stderr, "-C requires a filename as argument.\n");
meillo@262 495 exit(1);
meillo@10 496 }
meillo@249 497
meillo@249 498 } else if (strncmp(opt, "d", 1) == 0) {
meillo@249 499 if (getuid() != 0) {
meillo@249 500 fprintf(stderr, "only root may set the debug level.\n");
meillo@262 501 exit(1);
meillo@249 502 }
meillo@249 503 char *lvl = get_optarg(argv, &arg, opt+1);
meillo@249 504 if (!lvl) {
meillo@249 505 fprintf(stderr, "-d requires a number argument.\n");
meillo@262 506 exit(1);
meillo@249 507 }
meillo@249 508 debug_level = atoi(lvl);
meillo@249 509
meillo@249 510 } else if (strncmp(opt, "f", 1) == 0) {
meillo@249 511 /* set return path */
meillo@249 512 gchar *address = get_optarg(argv, &arg, opt+1);
meillo@249 513 if (!address) {
meillo@249 514 fprintf(stderr, "-f requires an address argument\n");
meillo@262 515 exit(1);
meillo@249 516 }
meillo@249 517 f_address = g_strdup(address);
meillo@249 518
meillo@249 519 } else if (strncmp(opt, "F", 1) == 0) {
meillo@249 520 full_sender_name = get_optarg(argv, &arg, opt+1);
meillo@249 521 if (!full_sender_name) {
meillo@249 522 fprintf(stderr, "-F requires a name argument\n");
meillo@262 523 exit(1);
meillo@249 524 }
meillo@249 525
meillo@249 526 } else if (strcmp(opt, "i") == 0) {
meillo@249 527 opt_i = TRUE;
meillo@249 528
meillo@249 529 } else if (strcmp(opt, "m") == 0) {
meillo@249 530 /* ignore -m (me too) switch (see man page) */
meillo@249 531
meillo@249 532 } else if (strcmp(opt, "Mrm") == 0) {
meillo@281 533 set_mode(MODE_MCMD);
meillo@249 534 M_cmd = "rm";
meillo@249 535
meillo@249 536 } else if (strcmp(opt, "odq") == 0) {
meillo@249 537 do_queue = TRUE;
meillo@249 538
meillo@249 539 } else if (strcmp(opt, "oi") == 0) {
meillo@257 540 opt_i = TRUE;
meillo@249 541
meillo@249 542 } else if (strncmp(opt, "o", 1) == 0) {
meillo@249 543 /* ignore all other -oXXX options */
meillo@249 544
meillo@249 545 } else if (strncmp(opt, "qo", 2) == 0) {
meillo@278 546 /* must be before the `q' check */
meillo@281 547 set_mode(MODE_RUNQUEUE);
meillo@249 548 do_runq_online = TRUE;
meillo@249 549 /* can be NULL, then we use online detection method */
meillo@290 550 /* TODO: behavior might change if it is NULL */
meillo@249 551 route_name = get_optarg(argv, &arg, opt+2);
meillo@290 552 if (!route_name) {
meillo@290 553 fprintf(stderr, "Please do not use -qo without argument anymore; use -q instead.\n");
meillo@290 554 fprintf(stderr, "The behavior for -qo without argument is likely to change.\n");
meillo@290 555 }
meillo@249 556
meillo@249 557 } else if (strncmp(opt, "q", 1) == 0) {
meillo@249 558 /* must be after the `qo' check */
meillo@249 559 gchar *optarg;
meillo@249 560
meillo@251 561 optarg = get_optarg(argv, &arg, opt+1);
meillo@251 562 if (optarg) {
meillo@251 563 /* not just one single queue run but regular runs */
meillo@281 564 set_mode(MODE_DAEMON);
meillo@254 565 queue_interval = time_interval(optarg);
meillo@281 566 } else {
meillo@281 567 set_mode(MODE_RUNQUEUE);
meillo@281 568 do_runq = TRUE;
meillo@249 569 }
meillo@249 570
meillo@249 571 } else if (strcmp(opt, "t") == 0) {
meillo@249 572 opt_t = TRUE;
meillo@249 573
meillo@249 574 } else if (strcmp(opt, "v") == 0) {
meillo@249 575 do_verbose = TRUE;
meillo@249 576
meillo@10 577 } else {
meillo@249 578 fprintf(stderr, "unrecognized option `-%s'\n", opt);
meillo@262 579 exit(1);
meillo@10 580 }
meillo@0 581 }
meillo@0 582
meillo@281 583 if (!mta_mode && arg==argc && !opt_t) {
meillo@278 584 /*
meillo@367 585 ** In this case no rcpts can be found, thus no mail
meillo@367 586 ** can be sent, thus masqmail will always fail. We
meillo@367 587 ** rather do something better instead. This covers
meillo@367 588 ** also the case of calling masqmail without args.
meillo@278 589 */
meillo@281 590 mode_version();
meillo@281 591 exit(0);
meillo@259 592 }
meillo@259 593
meillo@10 594 if (mta_mode == MODE_VERSION) {
meillo@261 595 mode_version();
meillo@262 596 exit(0);
meillo@10 597 }
meillo@0 598
meillo@281 599 if (!mta_mode) {
meillo@281 600 mta_mode = MODE_ACCEPT;
meillo@281 601 }
meillo@281 602
meillo@10 603 /* initialize random generator */
meillo@10 604 srand(time(NULL));
meillo@10 605 /* ignore SIGPIPE signal */
meillo@10 606 signal(SIGPIPE, SIG_IGN);
meillo@0 607
meillo@73 608 /* close all possibly open file descriptors, except std{in,out,err} */
meillo@10 609 {
meillo@10 610 int i, max_fd = sysconf(_SC_OPEN_MAX);
meillo@0 611
meillo@251 612 if (max_fd <= 0) {
meillo@10 613 max_fd = 64;
meillo@251 614 }
meillo@251 615 for (i=3; i<max_fd; i++) {
meillo@10 616 close(i);
meillo@251 617 }
meillo@10 618 }
meillo@0 619
meillo@10 620 init_conf();
meillo@0 621
meillo@367 622 /*
meillo@367 623 ** if we are not privileged, and the config file was changed we
meillo@367 624 ** implicetely set the the run_as_user flag and give up all
meillo@367 625 ** privileges.
meillo@367 626 **
meillo@367 627 ** So it is possible for a user to run his own daemon without
meillo@367 628 ** breaking security.
meillo@367 629 */
meillo@251 630 if ((strcmp(conf_file, CONF_FILE) != 0) && (conf.orig_uid != 0)) {
meillo@251 631 conf.run_as_user = TRUE;
meillo@331 632 set_euidgid(conf.orig_uid, conf.orig_gid, NULL, NULL);
meillo@331 633 if (setgid(conf.orig_gid)) {
meillo@331 634 logwrite(LOG_ALERT, "could not set gid to %d: %s\n", conf.orig_gid, strerror(errno));
meillo@331 635 exit(1);
meillo@331 636 }
meillo@331 637 if (setuid(conf.orig_uid)) {
meillo@331 638 logwrite(LOG_ALERT, "could not set uid to %d: %s\n", conf.orig_uid, strerror(errno));
meillo@331 639 exit(1);
meillo@331 640 }
meillo@10 641 }
meillo@0 642
meillo@155 643 conf.log_dir = LOG_DIR;
meillo@288 644 /* FIXME: fails if we run as user */
meillo@155 645 logopen();
meillo@155 646 if (!read_conf(conf_file)) {
meillo@155 647 logwrite(LOG_ALERT, "SHUTTING DOWN due to problems reading config\n");
meillo@155 648 exit(5);
meillo@155 649 }
meillo@155 650 logclose();
meillo@0 651
meillo@251 652 if (do_queue) {
meillo@10 653 conf.do_queue = TRUE;
meillo@251 654 }
meillo@251 655 if (do_verbose) {
meillo@10 656 conf.do_verbose = TRUE;
meillo@251 657 }
meillo@251 658 if (debug_level >= 0) { /* if >= 0, it was given by argument */
meillo@10 659 conf.debug_level = debug_level;
meillo@251 660 }
meillo@0 661
meillo@367 662 /*
meillo@367 663 ** It appears that changing to / ensures that we are never in
meillo@367 664 ** a directory which we cannot access. This situation could be
meillo@367 665 ** possible after changing identity.
meillo@367 666 ** Maybe we should only change to / if we not run as user, to
meillo@367 667 ** allow relative paths for log files in test setups for
meillo@367 668 ** instance.
meillo@46 669 */
meillo@10 670 chdir("/");
meillo@0 671
meillo@10 672 if (!conf.run_as_user) {
meillo@10 673 if (setgid(0) != 0) {
meillo@10 674 fprintf(stderr, "could not set gid to 0. Is the setuid bit set? : %s\n", strerror(errno));
meillo@262 675 exit(1);
meillo@10 676 }
meillo@10 677 if (setuid(0) != 0) {
meillo@10 678 fprintf(stderr, "could not gain root privileges. Is the setuid bit set? : %s\n", strerror(errno));
meillo@262 679 exit(1);
meillo@10 680 }
meillo@10 681 }
meillo@0 682
meillo@10 683 if (!logopen()) {
meillo@10 684 fprintf(stderr, "could not open log file\n");
meillo@262 685 exit(1);
meillo@10 686 }
meillo@0 687
meillo@10 688 DEBUG(1) debugf("masqmail %s starting\n", VERSION);
meillo@0 689
meillo@10 690 DEBUG(5) {
meillo@10 691 gchar **str = argv;
meillo@10 692 debugf("args: \n");
meillo@10 693 while (*str) {
meillo@10 694 debugf("%s \n", *str);
meillo@10 695 str++;
meillo@10 696 }
meillo@10 697 }
meillo@10 698 DEBUG(5) debugf("queue_interval = %d\n", queue_interval);
meillo@0 699
meillo@10 700 if (f_address) {
meillo@10 701 return_path = create_address_qualified(f_address, TRUE, conf.host_name);
meillo@10 702 g_free(f_address);
meillo@10 703 if (!return_path) {
meillo@10 704 fprintf(stderr, "invalid RFC821 address: %s\n", f_address);
meillo@262 705 exit(1);
meillo@10 706 }
meillo@10 707 }
meillo@10 708
meillo@10 709 switch (mta_mode) {
meillo@10 710 case MODE_DAEMON:
meillo@10 711 mode_daemon(do_listen, queue_interval, argv);
meillo@10 712 break;
meillo@251 713
meillo@10 714 case MODE_RUNQUEUE:
meillo@251 715 exit(run_queue(do_runq, do_runq_online, route_name) ? 0 : 1);
meillo@10 716 break;
meillo@10 717
meillo@10 718 case MODE_SMTP:
meillo@10 719 mode_smtp();
meillo@10 720 break;
meillo@10 721
meillo@10 722 case MODE_LIST:
meillo@10 723 queue_list();
meillo@10 724 break;
meillo@10 725
meillo@10 726 case MODE_BI:
meillo@262 727 exit(0);
meillo@10 728 break; /* well... */
meillo@10 729
meillo@10 730 case MODE_MCMD:
meillo@250 731 exit(manipulate_queue(M_cmd, &argv[arg]) ? 0 : 1);
meillo@10 732 break;
meillo@10 733
meillo@10 734 case MODE_ACCEPT:
meillo@10 735 {
meillo@268 736 guint accept_flags = (opt_t ? ACC_RCPT_FROM_HEAD : 0)
meillo@110 737 | (opt_i ? ACC_DOT_IGNORE : ACC_NODOT_RELAX);
meillo@10 738 mode_accept(return_path, full_sender_name, accept_flags, &(argv[arg]), argc - arg);
meillo@258 739 exit(0);
meillo@10 740 }
meillo@10 741 break;
meillo@251 742
meillo@10 743 default:
meillo@10 744 fprintf(stderr, "unknown mode: %d\n", mta_mode);
meillo@10 745 break;
meillo@0 746 }
meillo@0 747
meillo@10 748 logclose();
meillo@0 749
meillo@263 750 exit(0);
meillo@0 751 }