masqmail

annotate src/masqmail.c @ 197:50011f65bd35

find changesets by author, revision, files, or words in the commit message
added comment: TODO file may not be up-to-date there is some stuff in it that is not wanted any longer there are goals not included in it
author meillo@marmaro.de
date Fri, 16 Jul 2010 10:06:32 +0200
parents 8630e37ae445
children 5745edd5b769
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@10 41 MODE_ACCEPT = 0, /* accept message on stdin */
meillo@10 42 MODE_DAEMON, /* run as daemon */
meillo@10 43 MODE_RUNQUEUE, /* single queue run, online or offline */
meillo@10 44 MODE_SMTP, /* accept SMTP on stdin */
meillo@10 45 MODE_LIST, /* list queue */
meillo@10 46 MODE_MCMD, /* do queue manipulation */
meillo@10 47 MODE_VERSION, /* show version */
meillo@10 48 MODE_BI, /* fake ;-) */
meillo@10 49 MODE_NONE /* to prevent default MODE_ACCEPT */
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@10 94 gchar*
meillo@10 95 get_optarg(char *argv[], gint argc, gint * argp, gint * pos)
meillo@0 96 {
meillo@10 97 if (argv[*argp][*pos])
meillo@10 98 return &(argv[*argp][*pos]);
meillo@10 99 else {
meillo@10 100 if (*argp + 1 < argc) {
meillo@10 101 if (argv[(*argp) + 1][0] != '-') {
meillo@10 102 (*argp)++;
meillo@10 103 *pos = 0;
meillo@10 104 return &(argv[*argp][*pos]);
meillo@10 105 }
meillo@10 106 }
meillo@10 107 }
meillo@10 108 return NULL;
meillo@0 109 }
meillo@0 110
meillo@10 111 gchar*
meillo@10 112 get_progname(gchar * arg0)
meillo@0 113 {
meillo@10 114 gchar *p = arg0 + strlen(arg0) - 1;
meillo@10 115 while (p > arg0) {
meillo@10 116 if (*p == '/')
meillo@10 117 return p + 1;
meillo@10 118 p--;
meillo@10 119 }
meillo@10 120 return p;
meillo@0 121 }
meillo@0 122
meillo@10 123 gboolean
meillo@10 124 write_pidfile(gchar * name)
meillo@0 125 {
meillo@10 126 FILE *fptr;
meillo@0 127
meillo@10 128 if ((fptr = fopen(name, "wt"))) {
meillo@10 129 fprintf(fptr, "%d\n", getpid());
meillo@10 130 fclose(fptr);
meillo@10 131 pidfile = strdup(name);
meillo@10 132 return TRUE;
meillo@10 133 }
meillo@10 134 logwrite(LOG_WARNING, "could not write pid file: %s\n", strerror(errno));
meillo@10 135 return FALSE;
meillo@10 136 }
meillo@0 137
meillo@10 138 static void
meillo@10 139 mode_daemon(gboolean do_listen, gint queue_interval, char *argv[])
meillo@10 140 {
meillo@10 141 guint pid;
meillo@0 142
meillo@10 143 /* daemon */
meillo@10 144 if (!conf.run_as_user) {
meillo@10 145 if ((conf.orig_uid != 0) && (conf.orig_uid != conf.mail_uid)) {
meillo@10 146 fprintf(stderr, "must be root or %s for daemon.\n", DEF_MAIL_USER);
meillo@10 147 exit(EXIT_FAILURE);
meillo@10 148 }
meillo@10 149 }
meillo@0 150
meillo@74 151 /* reparent to init only if init is not already the parent */
meillo@74 152 if (getppid() != 1) {
meillo@74 153 if ((pid = fork()) > 0) {
meillo@74 154 exit(EXIT_SUCCESS);
meillo@74 155 } else if (pid < 0) {
meillo@74 156 logwrite(LOG_ALERT, "could not fork!");
meillo@74 157 exit(EXIT_FAILURE);
meillo@74 158 }
meillo@10 159 }
meillo@0 160
meillo@10 161 signal(SIGTERM, sigterm_handler);
meillo@10 162 write_pidfile(PIDFILEDIR "/masqmail.pid");
meillo@0 163
meillo@10 164 conf.do_verbose = FALSE;
meillo@10 165
meillo@72 166 /* closing and reopening the log ensures that it is open afterwards
meillo@72 167 because it is possible that the log is assigned to fd 1 and gets
meillo@72 168 thus closes by fclose(stdout). Similar for the debugfile.
meillo@72 169 */
meillo@72 170 logclose();
meillo@10 171 fclose(stdin);
meillo@10 172 fclose(stdout);
meillo@10 173 fclose(stderr);
meillo@72 174 logopen();
meillo@10 175
meillo@167 176 logwrite(LOG_NOTICE, "%s %s daemon starting", PACKAGE, VERSION);
meillo@10 177 listen_port(do_listen ? conf.listen_addresses : NULL, queue_interval, argv);
meillo@0 178 }
meillo@0 179
meillo@0 180 #ifdef ENABLE_SMTP_SERVER
meillo@10 181 static void
meillo@10 182 mode_smtp()
meillo@0 183 {
meillo@10 184 /* accept smtp message on stdin */
meillo@10 185 /* write responses to stderr. */
meillo@0 186
meillo@10 187 struct sockaddr_in saddr;
meillo@10 188 gchar *peername = NULL;
meillo@10 189 int dummy = sizeof(saddr);
meillo@0 190
meillo@10 191 conf.do_verbose = FALSE;
meillo@0 192
meillo@10 193 if (!conf.run_as_user) {
meillo@10 194 seteuid(conf.orig_uid);
meillo@10 195 setegid(conf.orig_gid);
meillo@10 196 }
meillo@0 197
meillo@10 198 DEBUG(5) debugf("accepting smtp message on stdin\n");
meillo@0 199
meillo@10 200 if (getpeername(0, (struct sockaddr *) (&saddr), &dummy) == 0) {
meillo@10 201 peername = g_strdup(inet_ntoa(saddr.sin_addr));
meillo@10 202 } else if (errno != ENOTSOCK)
meillo@10 203 exit(EXIT_FAILURE);
meillo@0 204
meillo@10 205 smtp_in(stdin, stderr, peername, NULL);
meillo@0 206 }
meillo@0 207 #endif
meillo@0 208
meillo@10 209 static void
meillo@10 210 mode_accept(address * return_path, gchar * full_sender_name, guint accept_flags, char **addresses, int addr_cnt)
meillo@0 211 {
meillo@10 212 /* accept message on stdin */
meillo@10 213 accept_error err;
meillo@10 214 message *msg = create_message();
meillo@10 215 gint i;
meillo@0 216
meillo@83 217 if (return_path && !is_privileged_user(conf.orig_uid)) {
meillo@96 218 fprintf(stderr, "must be root, %s or in group %s for setting return path.\n", DEF_MAIL_USER, DEF_MAIL_GROUP);
meillo@83 219 exit(EXIT_FAILURE);
meillo@10 220 }
meillo@0 221
meillo@10 222 if (!conf.run_as_user) {
meillo@10 223 seteuid(conf.orig_uid);
meillo@10 224 setegid(conf.orig_gid);
meillo@10 225 }
meillo@0 226
meillo@10 227 DEBUG(5) debugf("accepting message on stdin\n");
meillo@0 228
meillo@10 229 msg->received_prot = PROT_LOCAL;
meillo@10 230 for (i = 0; i < addr_cnt; i++) {
meillo@10 231 if (addresses[i][0] != '|')
meillo@10 232 msg->rcpt_list = g_list_append(msg->rcpt_list, create_address_qualified(addresses[i], TRUE, conf.host_name));
meillo@10 233 else {
meillo@10 234 logwrite(LOG_ALERT, "no pipe allowed as recipient address: %s\n", addresses[i]);
meillo@10 235 exit(EXIT_FAILURE);
meillo@10 236 }
meillo@10 237 }
meillo@0 238
meillo@10 239 /* -f option */
meillo@10 240 msg->return_path = return_path;
meillo@0 241
meillo@10 242 /* -F option */
meillo@10 243 msg->full_sender_name = full_sender_name;
meillo@0 244
meillo@10 245 if ((err = accept_message(stdin, msg, accept_flags)) == AERR_OK) {
meillo@10 246 if (spool_write(msg, TRUE)) {
meillo@10 247 pid_t pid;
meillo@10 248 logwrite(LOG_NOTICE, "%s <= %s with %s\n", msg->uid, addr_string(msg->return_path), prot_names[PROT_LOCAL]);
meillo@0 249
meillo@10 250 if (!conf.do_queue) {
meillo@10 251 if ((pid = fork()) == 0) {
meillo@10 252 conf.do_verbose = FALSE;
meillo@10 253 fclose(stdin);
meillo@10 254 fclose(stdout);
meillo@10 255 fclose(stderr);
meillo@10 256 if (deliver(msg)) {
meillo@10 257 exit(EXIT_SUCCESS);
meillo@10 258 } else
meillo@10 259 exit(EXIT_FAILURE);
meillo@10 260 } else if (pid < 0) {
meillo@10 261 logwrite(LOG_ALERT, "could not fork for delivery, id = %s", msg->uid);
meillo@10 262 }
meillo@10 263 }
meillo@10 264 } else {
meillo@10 265 fprintf(stderr, "Could not write spool file\n");
meillo@10 266 exit(EXIT_FAILURE);
meillo@10 267 }
meillo@10 268 } else {
meillo@10 269 switch (err) {
meillo@10 270 case AERR_EOF:
meillo@10 271 fprintf(stderr, "unexpected EOF.\n");
meillo@10 272 exit(EXIT_FAILURE);
meillo@10 273 case AERR_NORCPT:
meillo@10 274 fprintf(stderr, "no recipients.\n");
meillo@10 275 exit(EXIT_FAILURE);
meillo@117 276 case AERR_SIZE:
meillo@117 277 fprintf(stderr, "max message size exceeded.\n");
meillo@117 278 exit(EXIT_FAILURE);
meillo@10 279 default:
meillo@10 280 /* should never happen: */
meillo@10 281 fprintf(stderr, "Unknown error (%d)\r\n", err);
meillo@10 282 exit(EXIT_FAILURE);
meillo@10 283 }
meillo@10 284 exit(EXIT_FAILURE);
meillo@0 285 }
meillo@0 286 }
meillo@0 287
meillo@0 288 int
meillo@0 289 main(int argc, char *argv[])
meillo@0 290 {
meillo@10 291 /* cmd line flags */
meillo@10 292 gchar *conf_file = CONF_FILE;
meillo@10 293 gint arg = 1;
meillo@0 294
meillo@10 295 gboolean do_listen = FALSE;
meillo@10 296 gboolean do_runq = FALSE;
meillo@10 297 gboolean do_runq_online = FALSE;
meillo@0 298
meillo@10 299 gboolean do_queue = FALSE;
meillo@0 300
meillo@10 301 gboolean do_verbose = FALSE;
meillo@10 302 gint debug_level = -1;
meillo@0 303
meillo@10 304 mta_mode mta_mode = MODE_ACCEPT;
meillo@0 305
meillo@10 306 gint queue_interval = 0;
meillo@10 307 gboolean opt_t = FALSE;
meillo@10 308 gboolean opt_i = FALSE;
meillo@10 309 gboolean opt_odb = FALSE;
meillo@10 310 gboolean opt_oem = FALSE;
meillo@10 311 gboolean exit_failure = FALSE;
meillo@0 312
meillo@10 313 gchar *M_cmd = NULL;
meillo@0 314
meillo@10 315 gint exit_code = EXIT_SUCCESS;
meillo@10 316 gchar *route_name = NULL;
meillo@10 317 gchar *progname;
meillo@10 318 gchar *f_address = NULL;
meillo@10 319 gchar *full_sender_name = NULL;
meillo@10 320 address *return_path = NULL; /* may be changed by -f option */
meillo@0 321
meillo@10 322 progname = get_progname(argv[0]);
meillo@0 323
meillo@10 324 if (strcmp(progname, "mailq") == 0) {
meillo@10 325 mta_mode = MODE_LIST;
meillo@10 326 } else if (strcmp(progname, "mailrm") == 0) {
meillo@10 327 mta_mode = MODE_MCMD;
meillo@10 328 M_cmd = "rm";
meillo@10 329 } else if (strcmp(progname, "runq") == 0) {
meillo@10 330 mta_mode = MODE_RUNQUEUE;
meillo@10 331 do_runq = TRUE;
meillo@10 332 } else if (strcmp(progname, "rmail") == 0) {
meillo@89 333 /* the `rmail' alias should probably be removed now
meillo@89 334 that we have the rmail script. But let's keep it
meillo@89 335 for some while for compatibility. 2010-06-19 */
meillo@10 336 mta_mode = MODE_ACCEPT;
meillo@10 337 opt_i = TRUE;
meillo@10 338 } else if (strcmp(progname, "smtpd") == 0 || strcmp(progname, "in.smtpd") == 0) {
meillo@10 339 mta_mode = MODE_SMTP;
meillo@10 340 }
meillo@0 341
meillo@10 342 /* parse cmd line */
meillo@10 343 while (arg < argc) {
meillo@10 344 gint pos = 0;
meillo@10 345 if ((argv[arg][pos] == '-') && (argv[arg][pos + 1] != '-')) {
meillo@10 346 pos++;
meillo@10 347 switch (argv[arg][pos++]) {
meillo@10 348 case 'b':
meillo@10 349 switch (argv[arg][pos++]) {
meillo@10 350 case 'd':
meillo@10 351 do_listen = TRUE;
meillo@10 352 mta_mode = MODE_DAEMON;
meillo@10 353 break;
meillo@10 354 case 'i':
meillo@10 355 /* ignored */
meillo@10 356 mta_mode = MODE_BI;
meillo@10 357 break;
meillo@10 358 case 's':
meillo@10 359 mta_mode = MODE_SMTP;
meillo@10 360 break;
meillo@10 361 case 'p':
meillo@10 362 mta_mode = MODE_LIST;
meillo@10 363 break;
meillo@10 364 case 'V':
meillo@10 365 mta_mode = MODE_VERSION;
meillo@10 366 break;
meillo@10 367 default:
meillo@10 368 fprintf(stderr, "unrecognized option '%s'\n", argv[arg]);
meillo@10 369 exit(EXIT_FAILURE);
meillo@10 370 }
meillo@10 371 break;
meillo@10 372 case 'B':
meillo@10 373 /* we ignore this and throw the argument away */
meillo@10 374 get_optarg(argv, argc, &arg, &pos);
meillo@10 375 break;
meillo@10 376 case 'C':
meillo@10 377 if (!(conf_file = get_optarg(argv, argc, &arg, &pos))) {
meillo@10 378 fprintf(stderr, "-C requires a filename as argument.\n");
meillo@10 379 exit(EXIT_FAILURE);
meillo@10 380 }
meillo@10 381 break;
meillo@10 382 case 'F':
meillo@10 383 {
meillo@10 384 full_sender_name = get_optarg(argv, argc, &arg, &pos);
meillo@10 385 if (!full_sender_name) {
meillo@10 386 fprintf(stderr, "-F requires a name as an argument\n");
meillo@10 387 exit(EXIT_FAILURE);
meillo@10 388 }
meillo@10 389 }
meillo@10 390 break;
meillo@10 391 case 'd':
meillo@10 392 if (getuid() == 0) {
meillo@10 393 char *lvl = get_optarg(argv, argc, &arg, &pos);
meillo@10 394 if (lvl)
meillo@10 395 debug_level = atoi(lvl);
meillo@10 396 else {
meillo@10 397 fprintf(stderr, "-d requires a number as an argument.\n");
meillo@10 398 exit(EXIT_FAILURE);
meillo@10 399 }
meillo@10 400 } else {
meillo@10 401 fprintf(stderr, "only root may set the debug level.\n");
meillo@10 402 exit(EXIT_FAILURE);
meillo@10 403 }
meillo@10 404 break;
meillo@10 405 case 'f':
meillo@10 406 /* set return path */
meillo@10 407 {
meillo@10 408 gchar *address;
meillo@10 409 address = get_optarg(argv, argc, &arg, &pos);
meillo@10 410 if (address) {
meillo@10 411 f_address = g_strdup(address);
meillo@10 412 } else {
meillo@10 413 fprintf(stderr, "-f requires an address as an argument\n");
meillo@10 414 exit(EXIT_FAILURE);
meillo@10 415 }
meillo@10 416 }
meillo@10 417 break;
meillo@10 418 case 'i':
meillo@10 419 if (argv[arg][pos] == 0) {
meillo@10 420 opt_i = TRUE;
meillo@10 421 exit_failure = FALSE; /* may override -oem */
meillo@10 422 } else {
meillo@10 423 fprintf(stderr, "unrecognized option '%s'\n", argv[arg]);
meillo@10 424 exit(EXIT_FAILURE);
meillo@10 425 }
meillo@10 426 break;
meillo@10 427 case 'M':
meillo@10 428 {
meillo@10 429 mta_mode = MODE_MCMD;
meillo@10 430 M_cmd = g_strdup(&(argv[arg][pos]));
meillo@10 431 }
meillo@10 432 break;
meillo@10 433 case 'o':
meillo@10 434 switch (argv[arg][pos++]) {
meillo@10 435 case 'e':
meillo@10 436 if (argv[arg][pos++] == 'm') /* -oem */
meillo@10 437 if (!opt_i)
meillo@10 438 exit_failure = TRUE;
meillo@10 439 opt_oem = TRUE;
meillo@10 440 break;
meillo@10 441 case 'd':
meillo@10 442 if (argv[arg][pos] == 'b') /* -odb */
meillo@10 443 opt_odb = TRUE;
meillo@10 444 else if (argv[arg][pos] == 'q') /* -odq */
meillo@10 445 do_queue = TRUE;
meillo@10 446 break;
meillo@10 447 case 'i':
meillo@10 448 opt_i = TRUE;
meillo@10 449 exit_failure = FALSE; /* may override -oem */
meillo@10 450 break;
meillo@10 451 }
meillo@10 452 break;
meillo@10 453
meillo@10 454 case 'q':
meillo@10 455 {
meillo@10 456 gchar *optarg;
meillo@10 457
meillo@10 458 do_runq = TRUE;
meillo@10 459 mta_mode = MODE_RUNQUEUE;
meillo@10 460 if (argv[arg][pos] == 'o') {
meillo@10 461 pos++;
meillo@10 462 do_runq = FALSE;
meillo@10 463 do_runq_online = TRUE;
meillo@10 464 /* can be NULL, then we use online detection method */
meillo@10 465 route_name = get_optarg(argv, argc, &arg, &pos);
meillo@10 466 } else
meillo@10 467 if ((optarg = get_optarg(argv, argc, &arg, &pos))) {
meillo@10 468 mta_mode = MODE_DAEMON;
meillo@10 469 queue_interval = time_interval(optarg, &pos);
meillo@10 470 }
meillo@10 471 }
meillo@10 472 break;
meillo@10 473 case 't':
meillo@10 474 if (argv[arg][pos] == 0) {
meillo@10 475 opt_t = TRUE;
meillo@10 476 } else {
meillo@10 477 fprintf(stderr, "unrecognized option '%s'\n", argv[arg]);
meillo@10 478 exit(EXIT_FAILURE);
meillo@10 479 }
meillo@10 480 break;
meillo@10 481 case 'v':
meillo@10 482 do_verbose = TRUE;
meillo@10 483 break;
meillo@10 484 default:
meillo@10 485 fprintf(stderr, "unrecognized option '%s'\n", argv[arg]);
meillo@10 486 exit(EXIT_FAILURE);
meillo@10 487 }
meillo@10 488 } else {
meillo@10 489 if (argv[arg][pos + 1] == '-') {
meillo@10 490 if (argv[arg][pos + 2] != '\0') {
meillo@10 491 fprintf(stderr, "unrecognized option '%s'\n", argv[arg]);
meillo@10 492 exit(EXIT_FAILURE);
meillo@10 493 }
meillo@10 494 arg++;
meillo@10 495 }
meillo@10 496 break;
meillo@10 497 }
meillo@10 498 arg++;
meillo@0 499 }
meillo@0 500
meillo@10 501 if (mta_mode == MODE_VERSION) {
meillo@12 502 gchar *with_resolver = "";
meillo@12 503 gchar *with_smtp_server = "";
meillo@12 504 gchar *with_auth = "";
meillo@12 505 gchar *with_maildir = "";
meillo@12 506 gchar *with_ident = "";
meillo@0 507
meillo@0 508 #ifdef ENABLE_RESOLVER
meillo@10 509 with_resolver = " +resolver";
meillo@0 510 #endif
meillo@0 511 #ifdef ENABLE_SMTP_SERVER
meillo@10 512 with_smtp_server = " +smtp-server";
meillo@0 513 #endif
meillo@0 514 #ifdef ENABLE_AUTH
meillo@10 515 with_auth = " +auth";
meillo@0 516 #endif
meillo@0 517 #ifdef ENABLE_MAILDIR
meillo@10 518 with_maildir = " +maildir";
meillo@0 519 #endif
meillo@0 520 #ifdef ENABLE_IDENT
meillo@10 521 with_ident = " +ident";
meillo@0 522 #endif
meillo@0 523
meillo@192 524 printf("%s %s%s%s%s%s%s\n", PACKAGE, VERSION, with_resolver, with_smtp_server,
meillo@192 525 with_auth, with_maildir, with_ident);
meillo@0 526
meillo@10 527 exit(EXIT_SUCCESS);
meillo@10 528 }
meillo@0 529
meillo@10 530 /* initialize random generator */
meillo@10 531 srand(time(NULL));
meillo@10 532 /* ignore SIGPIPE signal */
meillo@10 533 signal(SIGPIPE, SIG_IGN);
meillo@0 534
meillo@73 535 /* close all possibly open file descriptors, except std{in,out,err} */
meillo@10 536 {
meillo@10 537 int i, max_fd = sysconf(_SC_OPEN_MAX);
meillo@0 538
meillo@10 539 if (max_fd <= 0)
meillo@10 540 max_fd = 64;
meillo@10 541 for (i = 3; i < max_fd; i++)
meillo@10 542 close(i);
meillo@10 543 }
meillo@0 544
meillo@10 545 init_conf();
meillo@0 546
meillo@10 547 /* if we are not privileged, and the config file was changed we
meillo@10 548 implicetely set the the run_as_user flag and give up all
meillo@10 549 privileges.
meillo@0 550
meillo@10 551 So it is possible for a user to run his own daemon without
meillo@10 552 breaking security.
meillo@10 553 */
meillo@10 554 if (strcmp(conf_file, CONF_FILE) != 0) {
meillo@10 555 if (conf.orig_uid != 0) {
meillo@10 556 conf.run_as_user = TRUE;
meillo@10 557 seteuid(conf.orig_uid);
meillo@10 558 setegid(conf.orig_gid);
meillo@10 559 setuid(conf.orig_uid);
meillo@10 560 setgid(conf.orig_gid);
meillo@10 561 }
meillo@10 562 }
meillo@0 563
meillo@155 564 conf.log_dir = LOG_DIR;
meillo@155 565 logopen();
meillo@155 566 if (!read_conf(conf_file)) {
meillo@155 567 logwrite(LOG_ALERT, "SHUTTING DOWN due to problems reading config\n");
meillo@155 568 exit(5);
meillo@155 569 }
meillo@155 570 logclose();
meillo@0 571
meillo@10 572 if (do_queue)
meillo@10 573 conf.do_queue = TRUE;
meillo@10 574 if (do_verbose)
meillo@10 575 conf.do_verbose = TRUE;
meillo@10 576 if (debug_level >= 0) /* if >= 0, it was given by argument */
meillo@10 577 conf.debug_level = debug_level;
meillo@0 578
meillo@46 579 /* It appears that changing to / ensures that we are never in
meillo@46 580 a directory which we cannot access. This situation could be
meillo@46 581 possible after changing identity.
meillo@46 582 Maybe we should only change to / if we not run as user, to
meillo@46 583 allow relative paths for log files in test setups for
meillo@46 584 instance.
meillo@46 585 */
meillo@10 586 chdir("/");
meillo@0 587
meillo@10 588 if (!conf.run_as_user) {
meillo@10 589 if (setgid(0) != 0) {
meillo@10 590 fprintf(stderr, "could not set gid to 0. Is the setuid bit set? : %s\n", strerror(errno));
meillo@10 591 exit(EXIT_FAILURE);
meillo@10 592 }
meillo@10 593 if (setuid(0) != 0) {
meillo@10 594 fprintf(stderr, "could not gain root privileges. Is the setuid bit set? : %s\n", strerror(errno));
meillo@10 595 exit(EXIT_FAILURE);
meillo@10 596 }
meillo@10 597 }
meillo@0 598
meillo@10 599 if (!logopen()) {
meillo@10 600 fprintf(stderr, "could not open log file\n");
meillo@10 601 exit(EXIT_FAILURE);
meillo@10 602 }
meillo@0 603
meillo@10 604 DEBUG(1) debugf("masqmail %s starting\n", VERSION);
meillo@0 605
meillo@10 606 DEBUG(5) {
meillo@10 607 gchar **str = argv;
meillo@10 608 debugf("args: \n");
meillo@10 609 while (*str) {
meillo@10 610 debugf("%s \n", *str);
meillo@10 611 str++;
meillo@10 612 }
meillo@10 613 }
meillo@10 614 DEBUG(5) debugf("queue_interval = %d\n", queue_interval);
meillo@0 615
meillo@10 616 if (f_address) {
meillo@10 617 return_path = create_address_qualified(f_address, TRUE, conf.host_name);
meillo@10 618 g_free(f_address);
meillo@10 619 if (!return_path) {
meillo@10 620 fprintf(stderr, "invalid RFC821 address: %s\n", f_address);
meillo@10 621 exit(EXIT_FAILURE);
meillo@10 622 }
meillo@10 623 }
meillo@10 624
meillo@10 625 switch (mta_mode) {
meillo@10 626 case MODE_DAEMON:
meillo@10 627 mode_daemon(do_listen, queue_interval, argv);
meillo@10 628 break;
meillo@10 629 case MODE_RUNQUEUE:
meillo@10 630 {
meillo@10 631 /* queue runs */
meillo@10 632 set_identity(conf.orig_uid, "queue run");
meillo@0 633
meillo@10 634 if (do_runq)
meillo@10 635 exit_code = queue_run() ? EXIT_SUCCESS : EXIT_FAILURE;
meillo@10 636
meillo@10 637 if (do_runq_online) {
meillo@10 638 if (route_name != NULL) {
meillo@10 639 conf.online_detect = g_strdup("argument");
meillo@10 640 set_online_name(route_name);
meillo@10 641 }
meillo@10 642 exit_code =
meillo@10 643 queue_run_online() ? EXIT_SUCCESS : EXIT_FAILURE;
meillo@10 644 }
meillo@10 645 }
meillo@10 646 break;
meillo@10 647
meillo@10 648 case MODE_SMTP:
meillo@10 649 #ifdef ENABLE_SMTP_SERVER
meillo@10 650 mode_smtp();
meillo@10 651 #else
meillo@10 652 fprintf(stderr, "smtp server support not compiled in\n");
meillo@10 653 #endif
meillo@10 654 break;
meillo@10 655
meillo@10 656 case MODE_LIST:
meillo@10 657 queue_list();
meillo@10 658 break;
meillo@10 659
meillo@10 660 case MODE_BI:
meillo@10 661 exit(EXIT_SUCCESS);
meillo@10 662 break; /* well... */
meillo@10 663
meillo@10 664 case MODE_MCMD:
meillo@10 665 if (strcmp(M_cmd, "rm") == 0) {
meillo@10 666 gboolean ok = FALSE;
meillo@10 667
meillo@10 668 set_euidgid(conf.mail_uid, conf.mail_gid, NULL, NULL);
meillo@10 669
meillo@10 670 if (is_privileged_user(conf.orig_uid)) {
meillo@10 671 for (; arg < argc; arg++) {
meillo@10 672 if (queue_delete(argv[arg]))
meillo@10 673 ok = TRUE;
meillo@10 674 }
meillo@10 675 } else {
meillo@10 676 struct passwd *pw = getpwuid(conf.orig_uid);
meillo@10 677 if (pw) {
meillo@10 678 for (; arg < argc; arg++) {
meillo@10 679 message *msg = msg_spool_read(argv[arg], FALSE);
meillo@10 680 #ifdef ENABLE_IDENT
meillo@10 681 if (((msg->received_host == NULL) && (msg->received_prot == PROT_LOCAL))
meillo@10 682 || is_in_netlist(msg->received_host, conf.ident_trusted_nets)) {
meillo@10 683 #else
meillo@10 684 if ((msg->received_host == NULL) && (msg->received_prot == PROT_LOCAL)) {
meillo@10 685 #endif
meillo@10 686 if (msg->ident) {
meillo@10 687 if (strcmp(pw->pw_name, msg->ident) == 0) {
meillo@10 688 if (queue_delete(argv[arg]))
meillo@10 689 ok = TRUE;
meillo@10 690 } else {
meillo@10 691 fprintf(stderr, "you do not own message id %s\n", argv[arg]);
meillo@10 692 }
meillo@10 693 } else
meillo@10 694 fprintf(stderr, "message %s does not have an ident.\n", argv[arg]);
meillo@10 695 } else {
meillo@10 696 fprintf(stderr, "message %s was not received locally or from a trusted network.\n", argv[arg]);
meillo@10 697 }
meillo@10 698 }
meillo@10 699 } else {
meillo@10 700 fprintf(stderr, "could not find a passwd entry for uid %d: %s\n", conf.orig_uid, strerror(errno));
meillo@10 701 }
meillo@10 702 }
meillo@10 703 exit(ok ? EXIT_SUCCESS : EXIT_FAILURE);
meillo@10 704 } else {
meillo@10 705 fprintf(stderr, "unknown command %s\n", M_cmd);
meillo@10 706 exit(EXIT_FAILURE);
meillo@10 707 }
meillo@10 708 break;
meillo@10 709
meillo@10 710 case MODE_ACCEPT:
meillo@10 711 {
meillo@107 712 guint accept_flags = (opt_t ? ACC_DEL_RCPTS | ACC_RCPT_FROM_HEAD : 0)
meillo@110 713 | (opt_i ? ACC_DOT_IGNORE : ACC_NODOT_RELAX);
meillo@10 714 mode_accept(return_path, full_sender_name, accept_flags, &(argv[arg]), argc - arg);
meillo@10 715 exit(exit_failure ? EXIT_FAILURE : EXIT_SUCCESS);
meillo@10 716 }
meillo@10 717 break;
meillo@10 718 case MODE_NONE:
meillo@10 719 break;
meillo@10 720 default:
meillo@10 721 fprintf(stderr, "unknown mode: %d\n", mta_mode);
meillo@10 722 break;
meillo@0 723 }
meillo@0 724
meillo@10 725 logclose();
meillo@0 726
meillo@10 727 exit(exit_code);
meillo@0 728 }