masqmail

annotate src/masqmail.c @ 267:8be687c06c20

find changesets by author, revision, files, or words in the commit message
comments (should we really exit failure in this case?) see code
author markus schnalke <meillo@marmaro.de>
date Fri, 03 Dec 2010 11:37:01 -0300
parents ab39047ffe44
children 7b12d081b939
rev   line source
meillo@0 1 /* MasqMail
meillo@0 2 Copyright (C) 1999-2001 Oliver Kurth
meillo@76 3 Copyright (C) 2010 markus schnalke <meillo@marmaro.de>
meillo@0 4
meillo@0 5 This program is free software; you can redistribute it and/or modify
meillo@0 6 it under the terms of the GNU General Public License as published by
meillo@0 7 the Free Software Foundation; either version 2 of the License, or
meillo@0 8 (at your option) any later version.
meillo@0 9
meillo@0 10 This program is distributed in the hope that it will be useful,
meillo@0 11 but WITHOUT ANY WARRANTY; without even the implied warranty of
meillo@0 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
meillo@0 13 GNU General Public License for more details.
meillo@0 14
meillo@0 15 You should have received a copy of the GNU General Public License
meillo@0 16 along with this program; if not, write to the Free Software
meillo@0 17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
meillo@0 18 */
meillo@0 19
meillo@0 20 #include <stdio.h>
meillo@0 21 #include <errno.h>
meillo@0 22 #include <stdlib.h>
meillo@0 23 #include <string.h>
meillo@0 24 #include <unistd.h>
meillo@0 25 #include <sys/types.h>
meillo@0 26 #include <sys/socket.h>
meillo@0 27 #include <sys/time.h>
meillo@0 28 #include <netinet/in.h>
meillo@0 29 #include <netdb.h>
meillo@0 30 #include <syslog.h>
meillo@0 31 #include <signal.h>
meillo@0 32
meillo@0 33 #include <glib.h>
meillo@0 34
meillo@0 35 #include "masqmail.h"
meillo@0 36
meillo@192 37 /* mutually exclusive modes. Note that there is no 'queue daemon' mode.
meillo@192 38 It, as well as the distinction beween the two (non exclusive) daemon
meillo@192 39 (queue and listen) modes, is handled by flags.*/
meillo@10 40 typedef enum _mta_mode {
meillo@259 41 MODE_NONE = 0, /* for being able to check if a mode was defined */
meillo@259 42 MODE_ACCEPT, /* accept message on stdin */
meillo@10 43 MODE_DAEMON, /* run as daemon */
meillo@10 44 MODE_RUNQUEUE, /* single queue run, online or offline */
meillo@10 45 MODE_SMTP, /* accept SMTP on stdin */
meillo@10 46 MODE_LIST, /* list queue */
meillo@10 47 MODE_MCMD, /* do queue manipulation */
meillo@10 48 MODE_VERSION, /* show version */
meillo@10 49 MODE_BI, /* fake ;-) */
meillo@10 50 } mta_mode;
meillo@0 51
meillo@0 52 char *pidfile = NULL;
meillo@0 53 volatile int sigterm_in_progress = 0;
meillo@0 54
meillo@10 55 static void
meillo@10 56 sigterm_handler(int sig)
meillo@0 57 {
meillo@10 58 if (sigterm_in_progress)
meillo@10 59 raise(sig);
meillo@10 60 sigterm_in_progress = 1;
meillo@0 61
meillo@10 62 if (pidfile) {
meillo@10 63 uid_t uid;
meillo@10 64 uid = seteuid(0);
meillo@10 65 if (unlink(pidfile) != 0)
meillo@10 66 logwrite(LOG_WARNING, "could not delete pid file %s: %s\n", pidfile, strerror(errno));
meillo@10 67 seteuid(uid); /* we exit anyway after this, just to be sure */
meillo@10 68 }
meillo@0 69
meillo@10 70 signal(sig, SIG_DFL);
meillo@10 71 raise(sig);
meillo@0 72 }
meillo@0 73
meillo@10 74 #ifdef ENABLE_IDENT /* so far used for that only */
meillo@10 75 static gboolean
meillo@10 76 is_in_netlist(gchar * host, GList * netlist)
meillo@0 77 {
meillo@10 78 guint hostip = inet_addr(host);
meillo@10 79 struct in_addr addr;
meillo@0 80
meillo@10 81 addr.s_addr = hostip;
meillo@10 82 if (addr.s_addr != INADDR_NONE) {
meillo@10 83 GList *node;
meillo@10 84 foreach(netlist, node) {
meillo@10 85 struct in_addr *net = (struct in_addr *) (node->data);
meillo@10 86 if ((addr.s_addr & net->s_addr) == net->s_addr)
meillo@10 87 return TRUE;
meillo@10 88 }
meillo@10 89 }
meillo@10 90 return FALSE;
meillo@0 91 }
meillo@0 92 #endif
meillo@0 93
meillo@249 94 /*
meillo@249 95 argv: the original argv
meillo@249 96 argp: number of arg (may get modified!)
meillo@249 97 cp: pointing to the char after the option
meillo@249 98 e.g. `-d 6' `-d6'
meillo@249 99 ^ ^
meillo@249 100 */
meillo@10 101 gchar*
meillo@249 102 get_optarg(char* argv[], gint* argp, char* cp)
meillo@0 103 {
meillo@249 104 if (*cp) {
meillo@249 105 /* this kind: -xval */
meillo@249 106 return cp;
meillo@249 107 }
meillo@249 108 cp = argv[*argp+1];
meillo@249 109 if (cp && (*cp != '-')) {
meillo@249 110 /* this kind: -x val */
meillo@249 111 (*argp)++;
meillo@249 112 return cp;
meillo@10 113 }
meillo@10 114 return NULL;
meillo@0 115 }
meillo@0 116
meillo@10 117 gboolean
meillo@10 118 write_pidfile(gchar * name)
meillo@0 119 {
meillo@10 120 FILE *fptr;
meillo@0 121
meillo@10 122 if ((fptr = fopen(name, "wt"))) {
meillo@10 123 fprintf(fptr, "%d\n", getpid());
meillo@10 124 fclose(fptr);
meillo@10 125 pidfile = strdup(name);
meillo@10 126 return TRUE;
meillo@10 127 }
meillo@10 128 logwrite(LOG_WARNING, "could not write pid file: %s\n", strerror(errno));
meillo@10 129 return FALSE;
meillo@10 130 }
meillo@0 131
meillo@264 132 /* on -bd or if -q has an argument */
meillo@10 133 static void
meillo@10 134 mode_daemon(gboolean do_listen, gint queue_interval, char *argv[])
meillo@10 135 {
meillo@10 136 guint pid;
meillo@0 137
meillo@10 138 /* daemon */
meillo@10 139 if (!conf.run_as_user) {
meillo@10 140 if ((conf.orig_uid != 0) && (conf.orig_uid != conf.mail_uid)) {
meillo@10 141 fprintf(stderr, "must be root or %s for daemon.\n", DEF_MAIL_USER);
meillo@262 142 exit(1);
meillo@10 143 }
meillo@10 144 }
meillo@0 145
meillo@74 146 /* reparent to init only if init is not already the parent */
meillo@74 147 if (getppid() != 1) {
meillo@74 148 if ((pid = fork()) > 0) {
meillo@262 149 exit(0);
meillo@74 150 } else if (pid < 0) {
meillo@208 151 logwrite(LOG_ALERT, "could not fork!\n");
meillo@262 152 exit(1);
meillo@74 153 }
meillo@10 154 }
meillo@0 155
meillo@10 156 signal(SIGTERM, sigterm_handler);
meillo@10 157 write_pidfile(PIDFILEDIR "/masqmail.pid");
meillo@0 158
meillo@10 159 conf.do_verbose = FALSE;
meillo@10 160
meillo@72 161 /* closing and reopening the log ensures that it is open afterwards
meillo@72 162 because it is possible that the log is assigned to fd 1 and gets
meillo@72 163 thus closes by fclose(stdout). Similar for the debugfile.
meillo@72 164 */
meillo@72 165 logclose();
meillo@10 166 fclose(stdin);
meillo@10 167 fclose(stdout);
meillo@10 168 fclose(stderr);
meillo@72 169 logopen();
meillo@10 170
meillo@208 171 logwrite(LOG_NOTICE, "%s %s daemon starting\n", PACKAGE, VERSION);
meillo@10 172 listen_port(do_listen ? conf.listen_addresses : NULL, queue_interval, argv);
meillo@0 173 }
meillo@0 174
meillo@264 175 /* -bs or called as smtpd or in.smtpd */
meillo@10 176 static void
meillo@10 177 mode_smtp()
meillo@0 178 {
meillo@10 179 /* accept smtp message on stdin */
meillo@10 180 /* write responses to stderr. */
meillo@0 181
meillo@10 182 struct sockaddr_in saddr;
meillo@10 183 gchar *peername = NULL;
meillo@10 184 int dummy = sizeof(saddr);
meillo@0 185
meillo@10 186 conf.do_verbose = FALSE;
meillo@0 187
meillo@10 188 if (!conf.run_as_user) {
meillo@10 189 seteuid(conf.orig_uid);
meillo@10 190 setegid(conf.orig_gid);
meillo@10 191 }
meillo@0 192
meillo@10 193 DEBUG(5) debugf("accepting smtp message on stdin\n");
meillo@0 194
meillo@10 195 if (getpeername(0, (struct sockaddr *) (&saddr), &dummy) == 0) {
meillo@10 196 peername = g_strdup(inet_ntoa(saddr.sin_addr));
meillo@10 197 } else if (errno != ENOTSOCK)
meillo@262 198 exit(1);
meillo@0 199
meillo@10 200 smtp_in(stdin, stderr, peername, NULL);
meillo@0 201 }
meillo@0 202
meillo@264 203 /* default mode if address args or -t is specified, or called as rmail */
meillo@10 204 static void
meillo@10 205 mode_accept(address * return_path, gchar * full_sender_name, guint accept_flags, char **addresses, int addr_cnt)
meillo@0 206 {
meillo@10 207 /* accept message on stdin */
meillo@10 208 accept_error err;
meillo@10 209 message *msg = create_message();
meillo@10 210 gint i;
meillo@266 211 pid_t pid;
meillo@0 212
meillo@83 213 if (return_path && !is_privileged_user(conf.orig_uid)) {
meillo@96 214 fprintf(stderr, "must be root, %s or in group %s for setting return path.\n", DEF_MAIL_USER, DEF_MAIL_GROUP);
meillo@262 215 exit(1);
meillo@10 216 }
meillo@0 217
meillo@10 218 if (!conf.run_as_user) {
meillo@10 219 seteuid(conf.orig_uid);
meillo@10 220 setegid(conf.orig_gid);
meillo@10 221 }
meillo@0 222
meillo@10 223 DEBUG(5) debugf("accepting message on stdin\n");
meillo@0 224
meillo@10 225 msg->received_prot = PROT_LOCAL;
meillo@10 226 for (i = 0; i < addr_cnt; i++) {
meillo@266 227 if (addresses[i][0] == '|') {
meillo@10 228 logwrite(LOG_ALERT, "no pipe allowed as recipient address: %s\n", addresses[i]);
meillo@262 229 exit(1);
meillo@10 230 }
meillo@264 231 msg->rcpt_list = g_list_append(msg->rcpt_list, create_address_qualified(addresses[i], TRUE, conf.host_name));
meillo@10 232 }
meillo@0 233
meillo@10 234 /* -f option */
meillo@10 235 msg->return_path = return_path;
meillo@0 236
meillo@10 237 /* -F option */
meillo@10 238 msg->full_sender_name = full_sender_name;
meillo@0 239
meillo@266 240 err = accept_message(stdin, msg, accept_flags);
meillo@0 241
meillo@266 242 switch (err) {
meillo@266 243 case AERR_OK:
meillo@266 244 /* to continue; all other cases exit */
meillo@266 245 break;
meillo@266 246 case AERR_EOF:
meillo@266 247 fprintf(stderr, "unexpected EOF.\n");
meillo@266 248 exit(1);
meillo@266 249 case AERR_NORCPT:
meillo@266 250 fprintf(stderr, "no recipients.\n");
meillo@266 251 exit(1);
meillo@266 252 case AERR_SIZE:
meillo@266 253 fprintf(stderr, "max message size exceeded.\n");
meillo@266 254 exit(1);
meillo@266 255 default:
meillo@266 256 /* should never happen: */
meillo@266 257 fprintf(stderr, "Unknown error (%d)\r\n", err);
meillo@266 258 exit(1);
meillo@266 259 }
meillo@266 260
meillo@266 261 if (!spool_write(msg, TRUE)) {
meillo@266 262 fprintf(stderr, "Could not write spool file\n");
meillo@266 263 exit(1);
meillo@266 264 }
meillo@266 265
meillo@267 266 /* here the mail is queued and thus in our responsibility */
meillo@266 267 logwrite(LOG_NOTICE, "%s <= %s with %s\n", msg->uid, addr_string(msg->return_path), prot_names[PROT_LOCAL]);
meillo@266 268
meillo@266 269 if (conf.do_queue) {
meillo@266 270 /* we're finished as we only need to queue it */
meillo@266 271 return;
meillo@266 272 }
meillo@266 273
meillo@266 274 /* deliver at once */
meillo@266 275 if ((pid = fork()) < 0) {
meillo@266 276 logwrite(LOG_ALERT, "could not fork for delivery, id = %s\n", msg->uid);
meillo@266 277 } else if (pid == 0) {
meillo@266 278 conf.do_verbose = FALSE;
meillo@266 279 fclose(stdin);
meillo@266 280 fclose(stdout);
meillo@266 281 fclose(stderr);
meillo@266 282 if (deliver(msg)) {
meillo@266 283 exit(0);
meillo@10 284 } else {
meillo@267 285 /*
meillo@267 286 TODO:
meillo@267 287 Should we really fail here? Because the mail is queued
meillo@267 288 already. If we fail the client might submit it again.
meillo@267 289 If at-once-delivery is seen as an additional best-effort
meillo@267 290 service, then we should still exit successful here.
meillo@267 291 */
meillo@262 292 exit(1);
meillo@10 293 }
meillo@0 294 }
meillo@0 295 }
meillo@0 296
meillo@250 297 /*
meillo@264 298 if -Mrm is given
meillo@264 299
meillo@250 300 currently only the `rm' command is supported
meillo@250 301 until this changes, we don't need any facility for further commands
meillo@250 302 return success if at least one message had been deleted
meillo@250 303 */
meillo@250 304 static int
meillo@250 305 manipulate_queue(char* cmd, char* id[])
meillo@250 306 {
meillo@250 307 gboolean ok = FALSE;
meillo@250 308
meillo@250 309 if (strcmp(cmd, "rm") != 0) {
meillo@250 310 fprintf(stderr, "unknown command %s\n", cmd);
meillo@250 311 return FALSE;
meillo@250 312 }
meillo@250 313
meillo@250 314 set_euidgid(conf.mail_uid, conf.mail_gid, NULL, NULL);
meillo@250 315
meillo@250 316 /* privileged users may delete any mail */
meillo@250 317 if (is_privileged_user(conf.orig_uid)) {
meillo@250 318 for (; *id; id++) {
meillo@250 319 fprintf(stderr, "id: %s\n", *id);
meillo@250 320 if (queue_delete(*id)) {
meillo@250 321 ok = TRUE;
meillo@250 322 }
meillo@250 323 }
meillo@250 324 return ok;
meillo@250 325 }
meillo@250 326
meillo@250 327 struct passwd *pw = getpwuid(conf.orig_uid);
meillo@250 328 if (!pw) {
meillo@250 329 fprintf(stderr, "could not find a passwd entry for uid %d: %s\n",
meillo@250 330 conf.orig_uid, strerror(errno));
meillo@250 331 return FALSE;
meillo@250 332 }
meillo@250 333
meillo@250 334 /* non-privileged users may only delete their own messages */
meillo@250 335 for (; *id; id++) {
meillo@250 336 message *msg = msg_spool_read(*id, FALSE);
meillo@250 337
meillo@250 338 fprintf(stderr, "id: %s\n", *id);
meillo@250 339
meillo@250 340 if (!msg->ident) {
meillo@250 341 fprintf(stderr, "message %s does not have an ident\n", *id);
meillo@250 342 continue;
meillo@250 343 }
meillo@250 344 if (strcmp(pw->pw_name, msg->ident) != 0) {
meillo@250 345 fprintf(stderr, "you do not own message id %s\n", *id);
meillo@250 346 continue;
meillo@250 347 }
meillo@250 348
meillo@250 349 if ( (msg->received_host || (msg->received_prot != PROT_LOCAL))
meillo@250 350 #ifdef ENABLE_IDENT
meillo@250 351 && !is_in_netlist(msg->received_host, conf.ident_trusted_nets)
meillo@250 352 #endif
meillo@250 353 ) {
meillo@250 354 fprintf(stderr, "message %s was not received locally or from a trusted network\n", *id);
meillo@250 355 continue;
meillo@250 356 }
meillo@250 357
meillo@250 358 ok = queue_delete(*id);
meillo@250 359 }
meillo@250 360 return ok;
meillo@250 361 }
meillo@250 362
meillo@264 363 /* -qo, -q (without argument), or called as runq */
meillo@264 364 /* TODO: are -qo and -q exclusively or not?
meillo@264 365 And how is this related to being a daemon? */
meillo@251 366 static int
meillo@251 367 run_queue(gboolean do_runq, gboolean do_runq_online, char* route_name)
meillo@251 368 {
meillo@251 369 int ret;
meillo@251 370
meillo@251 371 /* queue runs */
meillo@251 372 set_identity(conf.orig_uid, "queue run");
meillo@251 373
meillo@251 374 if (do_runq) {
meillo@251 375 ret = queue_run();
meillo@251 376 }
meillo@251 377
meillo@251 378 if (do_runq_online) {
meillo@251 379 if (route_name) {
meillo@251 380 conf.online_detect = g_strdup("argument");
meillo@251 381 set_online_name(route_name);
meillo@251 382 }
meillo@251 383 ret = queue_run_online();
meillo@251 384 }
meillo@251 385 return ret;
meillo@251 386 }
meillo@251 387
meillo@264 388 /* -bV or default mode if neither addr arg nor -t */
meillo@261 389 static void
meillo@261 390 mode_version(void)
meillo@261 391 {
meillo@261 392 gchar *with_resolver = "";
meillo@261 393 gchar *with_auth = "";
meillo@261 394 gchar *with_ident = "";
meillo@261 395
meillo@261 396 #ifdef ENABLE_RESOLVER
meillo@261 397 with_resolver = " +resolver";
meillo@261 398 #endif
meillo@261 399 #ifdef ENABLE_AUTH
meillo@261 400 with_auth = " +auth";
meillo@261 401 #endif
meillo@261 402 #ifdef ENABLE_IDENT
meillo@261 403 with_ident = " +ident";
meillo@261 404 #endif
meillo@261 405
meillo@261 406 printf("%s %s%s%s%s\n", PACKAGE, VERSION, with_resolver, with_auth, with_ident);
meillo@261 407 }
meillo@261 408
meillo@0 409 int
meillo@0 410 main(int argc, char *argv[])
meillo@0 411 {
meillo@251 412 gchar *progname;
meillo@249 413 char* opt;
meillo@249 414 gint arg;
meillo@0 415
meillo@259 416 mta_mode mta_mode = MODE_NONE;
meillo@10 417 gboolean do_listen = FALSE;
meillo@10 418 gboolean do_runq = FALSE;
meillo@10 419 gboolean do_runq_online = FALSE;
meillo@10 420 gboolean do_queue = FALSE;
meillo@10 421 gint queue_interval = 0;
meillo@251 422 gchar *M_cmd = NULL;
meillo@10 423 gboolean opt_t = FALSE;
meillo@10 424 gboolean opt_i = FALSE;
meillo@251 425 gchar *conf_file = CONF_FILE;
meillo@10 426 gchar *route_name = NULL;
meillo@10 427 gchar *f_address = NULL;
meillo@251 428 address *return_path = NULL; /* may be changed by -f option */
meillo@10 429 gchar *full_sender_name = NULL;
meillo@251 430 gboolean do_verbose = FALSE;
meillo@251 431 gint debug_level = -1;
meillo@0 432
meillo@260 433 /* strip the path part */
meillo@261 434 progname = strrchr(argv[0], '/');
meillo@261 435 progname = (progname) ? progname+1 : argv[0];
meillo@0 436
meillo@10 437 if (strcmp(progname, "mailq") == 0) {
meillo@10 438 mta_mode = MODE_LIST;
meillo@10 439 } else if (strcmp(progname, "mailrm") == 0) {
meillo@10 440 mta_mode = MODE_MCMD;
meillo@10 441 M_cmd = "rm";
meillo@10 442 } else if (strcmp(progname, "runq") == 0) {
meillo@10 443 mta_mode = MODE_RUNQUEUE;
meillo@10 444 do_runq = TRUE;
meillo@10 445 } else if (strcmp(progname, "rmail") == 0) {
meillo@89 446 /* the `rmail' alias should probably be removed now
meillo@89 447 that we have the rmail script. But let's keep it
meillo@89 448 for some while for compatibility. 2010-06-19 */
meillo@10 449 mta_mode = MODE_ACCEPT;
meillo@10 450 opt_i = TRUE;
meillo@10 451 } else if (strcmp(progname, "smtpd") == 0 || strcmp(progname, "in.smtpd") == 0) {
meillo@10 452 mta_mode = MODE_SMTP;
meillo@10 453 }
meillo@0 454
meillo@10 455 /* parse cmd line */
meillo@249 456 for (arg=1; arg<argc && argv[arg][0]=='-'; arg++) {
meillo@251 457 opt = argv[arg] + 1; /* points to the char after the dash */
meillo@10 458
meillo@249 459 if (strcmp(opt, "-") == 0) {
meillo@249 460 /* everything after `--' are address arguments */
meillo@249 461 arg++;
meillo@249 462 break;
meillo@10 463
meillo@249 464 } else if (strcmp(opt, "bd") == 0) {
meillo@249 465 do_listen = TRUE;
meillo@249 466 mta_mode = MODE_DAEMON;
meillo@249 467
meillo@249 468 } else if (strcmp(opt, "bi") == 0) {
meillo@249 469 /* ignored */
meillo@249 470 mta_mode = MODE_BI;
meillo@249 471
meillo@249 472 } else if (strcmp(opt, "bs") == 0) {
meillo@249 473 mta_mode = MODE_SMTP;
meillo@249 474
meillo@249 475 } else if (strcmp(opt, "bp") == 0) {
meillo@249 476 mta_mode = MODE_LIST;
meillo@249 477
meillo@249 478 } else if (strcmp(opt, "bV") == 0) {
meillo@249 479 mta_mode = MODE_VERSION;
meillo@249 480
meillo@249 481 } else if (strncmp(opt, "B", 1) == 0) {
meillo@249 482 /* we ignore this and throw the argument away */
meillo@249 483 get_optarg(argv, &arg, opt+1);
meillo@249 484
meillo@249 485 } else if (strncmp(opt, "C", 1) == 0) {
meillo@251 486 conf_file = get_optarg(argv, &arg, opt+1);
meillo@251 487 if (!conf_file) {
meillo@249 488 fprintf(stderr, "-C requires a filename as argument.\n");
meillo@262 489 exit(1);
meillo@10 490 }
meillo@249 491
meillo@249 492 } else if (strncmp(opt, "d", 1) == 0) {
meillo@249 493 if (getuid() != 0) {
meillo@249 494 fprintf(stderr, "only root may set the debug level.\n");
meillo@262 495 exit(1);
meillo@249 496 }
meillo@249 497 char *lvl = get_optarg(argv, &arg, opt+1);
meillo@249 498 if (!lvl) {
meillo@249 499 fprintf(stderr, "-d requires a number argument.\n");
meillo@262 500 exit(1);
meillo@249 501 }
meillo@249 502 debug_level = atoi(lvl);
meillo@249 503
meillo@249 504 } else if (strncmp(opt, "f", 1) == 0) {
meillo@249 505 /* set return path */
meillo@249 506 gchar *address = get_optarg(argv, &arg, opt+1);
meillo@249 507 if (!address) {
meillo@249 508 fprintf(stderr, "-f requires an address argument\n");
meillo@262 509 exit(1);
meillo@249 510 }
meillo@249 511 f_address = g_strdup(address);
meillo@249 512
meillo@249 513 } else if (strncmp(opt, "F", 1) == 0) {
meillo@249 514 full_sender_name = get_optarg(argv, &arg, opt+1);
meillo@249 515 if (!full_sender_name) {
meillo@249 516 fprintf(stderr, "-F requires a name argument\n");
meillo@262 517 exit(1);
meillo@249 518 }
meillo@249 519
meillo@249 520 } else if (strcmp(opt, "i") == 0) {
meillo@249 521 opt_i = TRUE;
meillo@249 522
meillo@249 523 } else if (strcmp(opt, "m") == 0) {
meillo@249 524 /* ignore -m (me too) switch (see man page) */
meillo@249 525
meillo@249 526 } else if (strcmp(opt, "Mrm") == 0) {
meillo@249 527 mta_mode = MODE_MCMD;
meillo@249 528 M_cmd = "rm";
meillo@249 529
meillo@249 530 } else if (strcmp(opt, "odq") == 0) {
meillo@249 531 do_queue = TRUE;
meillo@249 532
meillo@249 533 } else if (strcmp(opt, "oi") == 0) {
meillo@257 534 opt_i = TRUE;
meillo@249 535
meillo@249 536 } else if (strncmp(opt, "o", 1) == 0) {
meillo@249 537 /* ignore all other -oXXX options */
meillo@249 538
meillo@249 539 } else if (strncmp(opt, "qo", 2) == 0) {
meillo@249 540 mta_mode = MODE_RUNQUEUE;
meillo@249 541 do_runq = FALSE;
meillo@249 542 do_runq_online = TRUE;
meillo@249 543 /* can be NULL, then we use online detection method */
meillo@249 544 route_name = get_optarg(argv, &arg, opt+2);
meillo@249 545
meillo@249 546 } else if (strncmp(opt, "q", 1) == 0) {
meillo@249 547 /* must be after the `qo' check */
meillo@249 548 gchar *optarg;
meillo@249 549
meillo@249 550 do_runq = TRUE;
meillo@249 551 mta_mode = MODE_RUNQUEUE;
meillo@251 552 optarg = get_optarg(argv, &arg, opt+1);
meillo@251 553 if (optarg) {
meillo@251 554 /* not just one single queue run but regular runs */
meillo@249 555 mta_mode = MODE_DAEMON;
meillo@254 556 queue_interval = time_interval(optarg);
meillo@249 557 }
meillo@249 558
meillo@249 559 } else if (strcmp(opt, "t") == 0) {
meillo@249 560 opt_t = TRUE;
meillo@249 561
meillo@249 562 } else if (strcmp(opt, "v") == 0) {
meillo@249 563 do_verbose = TRUE;
meillo@249 564
meillo@10 565 } else {
meillo@249 566 fprintf(stderr, "unrecognized option `-%s'\n", opt);
meillo@262 567 exit(1);
meillo@10 568 }
meillo@0 569 }
meillo@0 570
meillo@259 571 if (!mta_mode) {
meillo@259 572 mta_mode = (arg<argc || opt_t) ? MODE_ACCEPT : MODE_VERSION;
meillo@259 573 }
meillo@259 574
meillo@10 575 if (mta_mode == MODE_VERSION) {
meillo@261 576 mode_version();
meillo@262 577 exit(0);
meillo@10 578 }
meillo@0 579
meillo@10 580 /* initialize random generator */
meillo@10 581 srand(time(NULL));
meillo@10 582 /* ignore SIGPIPE signal */
meillo@10 583 signal(SIGPIPE, SIG_IGN);
meillo@0 584
meillo@73 585 /* close all possibly open file descriptors, except std{in,out,err} */
meillo@10 586 {
meillo@10 587 int i, max_fd = sysconf(_SC_OPEN_MAX);
meillo@0 588
meillo@251 589 if (max_fd <= 0) {
meillo@10 590 max_fd = 64;
meillo@251 591 }
meillo@251 592 for (i=3; i<max_fd; i++) {
meillo@10 593 close(i);
meillo@251 594 }
meillo@10 595 }
meillo@0 596
meillo@10 597 init_conf();
meillo@0 598
meillo@10 599 /* if we are not privileged, and the config file was changed we
meillo@10 600 implicetely set the the run_as_user flag and give up all
meillo@10 601 privileges.
meillo@0 602
meillo@10 603 So it is possible for a user to run his own daemon without
meillo@10 604 breaking security.
meillo@10 605 */
meillo@251 606 if ((strcmp(conf_file, CONF_FILE) != 0) && (conf.orig_uid != 0)) {
meillo@251 607 conf.run_as_user = TRUE;
meillo@251 608 seteuid(conf.orig_uid);
meillo@251 609 setegid(conf.orig_gid);
meillo@251 610 setuid(conf.orig_uid);
meillo@251 611 setgid(conf.orig_gid);
meillo@10 612 }
meillo@0 613
meillo@155 614 conf.log_dir = LOG_DIR;
meillo@155 615 logopen();
meillo@155 616 if (!read_conf(conf_file)) {
meillo@155 617 logwrite(LOG_ALERT, "SHUTTING DOWN due to problems reading config\n");
meillo@155 618 exit(5);
meillo@155 619 }
meillo@155 620 logclose();
meillo@0 621
meillo@251 622 if (do_queue) {
meillo@10 623 conf.do_queue = TRUE;
meillo@251 624 }
meillo@251 625 if (do_verbose) {
meillo@10 626 conf.do_verbose = TRUE;
meillo@251 627 }
meillo@251 628 if (debug_level >= 0) { /* if >= 0, it was given by argument */
meillo@10 629 conf.debug_level = debug_level;
meillo@251 630 }
meillo@0 631
meillo@46 632 /* It appears that changing to / ensures that we are never in
meillo@46 633 a directory which we cannot access. This situation could be
meillo@46 634 possible after changing identity.
meillo@46 635 Maybe we should only change to / if we not run as user, to
meillo@46 636 allow relative paths for log files in test setups for
meillo@46 637 instance.
meillo@46 638 */
meillo@10 639 chdir("/");
meillo@0 640
meillo@10 641 if (!conf.run_as_user) {
meillo@10 642 if (setgid(0) != 0) {
meillo@10 643 fprintf(stderr, "could not set gid to 0. Is the setuid bit set? : %s\n", strerror(errno));
meillo@262 644 exit(1);
meillo@10 645 }
meillo@10 646 if (setuid(0) != 0) {
meillo@10 647 fprintf(stderr, "could not gain root privileges. Is the setuid bit set? : %s\n", strerror(errno));
meillo@262 648 exit(1);
meillo@10 649 }
meillo@10 650 }
meillo@0 651
meillo@10 652 if (!logopen()) {
meillo@10 653 fprintf(stderr, "could not open log file\n");
meillo@262 654 exit(1);
meillo@10 655 }
meillo@0 656
meillo@10 657 DEBUG(1) debugf("masqmail %s starting\n", VERSION);
meillo@0 658
meillo@10 659 DEBUG(5) {
meillo@10 660 gchar **str = argv;
meillo@10 661 debugf("args: \n");
meillo@10 662 while (*str) {
meillo@10 663 debugf("%s \n", *str);
meillo@10 664 str++;
meillo@10 665 }
meillo@10 666 }
meillo@10 667 DEBUG(5) debugf("queue_interval = %d\n", queue_interval);
meillo@0 668
meillo@10 669 if (f_address) {
meillo@10 670 return_path = create_address_qualified(f_address, TRUE, conf.host_name);
meillo@10 671 g_free(f_address);
meillo@10 672 if (!return_path) {
meillo@10 673 fprintf(stderr, "invalid RFC821 address: %s\n", f_address);
meillo@262 674 exit(1);
meillo@10 675 }
meillo@10 676 }
meillo@10 677
meillo@10 678 switch (mta_mode) {
meillo@10 679 case MODE_DAEMON:
meillo@10 680 mode_daemon(do_listen, queue_interval, argv);
meillo@10 681 break;
meillo@251 682
meillo@10 683 case MODE_RUNQUEUE:
meillo@251 684 exit(run_queue(do_runq, do_runq_online, route_name) ? 0 : 1);
meillo@10 685 break;
meillo@10 686
meillo@10 687 case MODE_SMTP:
meillo@10 688 mode_smtp();
meillo@10 689 break;
meillo@10 690
meillo@10 691 case MODE_LIST:
meillo@10 692 queue_list();
meillo@10 693 break;
meillo@10 694
meillo@10 695 case MODE_BI:
meillo@262 696 exit(0);
meillo@10 697 break; /* well... */
meillo@10 698
meillo@10 699 case MODE_MCMD:
meillo@250 700 exit(manipulate_queue(M_cmd, &argv[arg]) ? 0 : 1);
meillo@10 701 break;
meillo@10 702
meillo@10 703 case MODE_ACCEPT:
meillo@10 704 {
meillo@107 705 guint accept_flags = (opt_t ? ACC_DEL_RCPTS | ACC_RCPT_FROM_HEAD : 0)
meillo@110 706 | (opt_i ? ACC_DOT_IGNORE : ACC_NODOT_RELAX);
meillo@10 707 mode_accept(return_path, full_sender_name, accept_flags, &(argv[arg]), argc - arg);
meillo@258 708 exit(0);
meillo@10 709 }
meillo@10 710 break;
meillo@251 711
meillo@10 712 default:
meillo@10 713 fprintf(stderr, "unknown mode: %d\n", mta_mode);
meillo@10 714 break;
meillo@0 715 }
meillo@0 716
meillo@10 717 logclose();
meillo@0 718
meillo@263 719 exit(0);
meillo@0 720 }