masqmail

annotate src/masqmail.c @ 219:c5d319418813

find changesets by author, revision, files, or words in the commit message
added config-transition this script takes config files and checks them for obsolete options if any found, it outputs them if called with -v it also explains how to substitute them the usual call: config-transition -v /etc/masqmail/*
author meillo@marmaro.de
date Wed, 21 Jul 2010 22:12:55 +0200
parents 4fd237550525
children 3c40f86d50e4
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@208 156 logwrite(LOG_ALERT, "could not fork!\n");
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@208 176 logwrite(LOG_NOTICE, "%s %s daemon starting\n", PACKAGE, VERSION);
meillo@10 177 listen_port(do_listen ? conf.listen_addresses : NULL, queue_interval, argv);
meillo@0 178 }
meillo@0 179
meillo@10 180 static void
meillo@10 181 mode_smtp()
meillo@0 182 {
meillo@10 183 /* accept smtp message on stdin */
meillo@10 184 /* write responses to stderr. */
meillo@0 185
meillo@10 186 struct sockaddr_in saddr;
meillo@10 187 gchar *peername = NULL;
meillo@10 188 int dummy = sizeof(saddr);
meillo@0 189
meillo@10 190 conf.do_verbose = FALSE;
meillo@0 191
meillo@10 192 if (!conf.run_as_user) {
meillo@10 193 seteuid(conf.orig_uid);
meillo@10 194 setegid(conf.orig_gid);
meillo@10 195 }
meillo@0 196
meillo@10 197 DEBUG(5) debugf("accepting smtp message on stdin\n");
meillo@0 198
meillo@10 199 if (getpeername(0, (struct sockaddr *) (&saddr), &dummy) == 0) {
meillo@10 200 peername = g_strdup(inet_ntoa(saddr.sin_addr));
meillo@10 201 } else if (errno != ENOTSOCK)
meillo@10 202 exit(EXIT_FAILURE);
meillo@0 203
meillo@10 204 smtp_in(stdin, stderr, peername, NULL);
meillo@0 205 }
meillo@0 206
meillo@10 207 static void
meillo@10 208 mode_accept(address * return_path, gchar * full_sender_name, guint accept_flags, char **addresses, int addr_cnt)
meillo@0 209 {
meillo@10 210 /* accept message on stdin */
meillo@10 211 accept_error err;
meillo@10 212 message *msg = create_message();
meillo@10 213 gint i;
meillo@0 214
meillo@83 215 if (return_path && !is_privileged_user(conf.orig_uid)) {
meillo@96 216 fprintf(stderr, "must be root, %s or in group %s for setting return path.\n", DEF_MAIL_USER, DEF_MAIL_GROUP);
meillo@83 217 exit(EXIT_FAILURE);
meillo@10 218 }
meillo@0 219
meillo@10 220 if (!conf.run_as_user) {
meillo@10 221 seteuid(conf.orig_uid);
meillo@10 222 setegid(conf.orig_gid);
meillo@10 223 }
meillo@0 224
meillo@10 225 DEBUG(5) debugf("accepting message on stdin\n");
meillo@0 226
meillo@10 227 msg->received_prot = PROT_LOCAL;
meillo@10 228 for (i = 0; i < addr_cnt; i++) {
meillo@10 229 if (addresses[i][0] != '|')
meillo@10 230 msg->rcpt_list = g_list_append(msg->rcpt_list, create_address_qualified(addresses[i], TRUE, conf.host_name));
meillo@10 231 else {
meillo@10 232 logwrite(LOG_ALERT, "no pipe allowed as recipient address: %s\n", addresses[i]);
meillo@10 233 exit(EXIT_FAILURE);
meillo@10 234 }
meillo@10 235 }
meillo@0 236
meillo@10 237 /* -f option */
meillo@10 238 msg->return_path = return_path;
meillo@0 239
meillo@10 240 /* -F option */
meillo@10 241 msg->full_sender_name = full_sender_name;
meillo@0 242
meillo@10 243 if ((err = accept_message(stdin, msg, accept_flags)) == AERR_OK) {
meillo@10 244 if (spool_write(msg, TRUE)) {
meillo@10 245 pid_t pid;
meillo@10 246 logwrite(LOG_NOTICE, "%s <= %s with %s\n", msg->uid, addr_string(msg->return_path), prot_names[PROT_LOCAL]);
meillo@0 247
meillo@10 248 if (!conf.do_queue) {
meillo@10 249 if ((pid = fork()) == 0) {
meillo@10 250 conf.do_verbose = FALSE;
meillo@10 251 fclose(stdin);
meillo@10 252 fclose(stdout);
meillo@10 253 fclose(stderr);
meillo@10 254 if (deliver(msg)) {
meillo@10 255 exit(EXIT_SUCCESS);
meillo@10 256 } else
meillo@10 257 exit(EXIT_FAILURE);
meillo@10 258 } else if (pid < 0) {
meillo@208 259 logwrite(LOG_ALERT, "could not fork for delivery, id = %s\n", msg->uid);
meillo@10 260 }
meillo@10 261 }
meillo@10 262 } else {
meillo@10 263 fprintf(stderr, "Could not write spool file\n");
meillo@10 264 exit(EXIT_FAILURE);
meillo@10 265 }
meillo@10 266 } else {
meillo@10 267 switch (err) {
meillo@10 268 case AERR_EOF:
meillo@10 269 fprintf(stderr, "unexpected EOF.\n");
meillo@10 270 exit(EXIT_FAILURE);
meillo@10 271 case AERR_NORCPT:
meillo@10 272 fprintf(stderr, "no recipients.\n");
meillo@10 273 exit(EXIT_FAILURE);
meillo@117 274 case AERR_SIZE:
meillo@117 275 fprintf(stderr, "max message size exceeded.\n");
meillo@117 276 exit(EXIT_FAILURE);
meillo@10 277 default:
meillo@10 278 /* should never happen: */
meillo@10 279 fprintf(stderr, "Unknown error (%d)\r\n", err);
meillo@10 280 exit(EXIT_FAILURE);
meillo@10 281 }
meillo@10 282 exit(EXIT_FAILURE);
meillo@0 283 }
meillo@0 284 }
meillo@0 285
meillo@0 286 int
meillo@0 287 main(int argc, char *argv[])
meillo@0 288 {
meillo@10 289 /* cmd line flags */
meillo@10 290 gchar *conf_file = CONF_FILE;
meillo@10 291 gint arg = 1;
meillo@0 292
meillo@10 293 gboolean do_listen = FALSE;
meillo@10 294 gboolean do_runq = FALSE;
meillo@10 295 gboolean do_runq_online = FALSE;
meillo@0 296
meillo@10 297 gboolean do_queue = FALSE;
meillo@0 298
meillo@10 299 gboolean do_verbose = FALSE;
meillo@10 300 gint debug_level = -1;
meillo@0 301
meillo@10 302 mta_mode mta_mode = MODE_ACCEPT;
meillo@0 303
meillo@10 304 gint queue_interval = 0;
meillo@10 305 gboolean opt_t = FALSE;
meillo@10 306 gboolean opt_i = FALSE;
meillo@10 307 gboolean opt_odb = FALSE;
meillo@10 308 gboolean opt_oem = FALSE;
meillo@10 309 gboolean exit_failure = FALSE;
meillo@0 310
meillo@10 311 gchar *M_cmd = NULL;
meillo@0 312
meillo@10 313 gint exit_code = EXIT_SUCCESS;
meillo@10 314 gchar *route_name = NULL;
meillo@10 315 gchar *progname;
meillo@10 316 gchar *f_address = NULL;
meillo@10 317 gchar *full_sender_name = NULL;
meillo@10 318 address *return_path = NULL; /* may be changed by -f option */
meillo@0 319
meillo@10 320 progname = get_progname(argv[0]);
meillo@0 321
meillo@10 322 if (strcmp(progname, "mailq") == 0) {
meillo@10 323 mta_mode = MODE_LIST;
meillo@10 324 } else if (strcmp(progname, "mailrm") == 0) {
meillo@10 325 mta_mode = MODE_MCMD;
meillo@10 326 M_cmd = "rm";
meillo@10 327 } else if (strcmp(progname, "runq") == 0) {
meillo@10 328 mta_mode = MODE_RUNQUEUE;
meillo@10 329 do_runq = TRUE;
meillo@10 330 } else if (strcmp(progname, "rmail") == 0) {
meillo@89 331 /* the `rmail' alias should probably be removed now
meillo@89 332 that we have the rmail script. But let's keep it
meillo@89 333 for some while for compatibility. 2010-06-19 */
meillo@10 334 mta_mode = MODE_ACCEPT;
meillo@10 335 opt_i = TRUE;
meillo@10 336 } else if (strcmp(progname, "smtpd") == 0 || strcmp(progname, "in.smtpd") == 0) {
meillo@10 337 mta_mode = MODE_SMTP;
meillo@10 338 }
meillo@0 339
meillo@10 340 /* parse cmd line */
meillo@10 341 while (arg < argc) {
meillo@10 342 gint pos = 0;
meillo@10 343 if ((argv[arg][pos] == '-') && (argv[arg][pos + 1] != '-')) {
meillo@10 344 pos++;
meillo@10 345 switch (argv[arg][pos++]) {
meillo@10 346 case 'b':
meillo@10 347 switch (argv[arg][pos++]) {
meillo@10 348 case 'd':
meillo@10 349 do_listen = TRUE;
meillo@10 350 mta_mode = MODE_DAEMON;
meillo@10 351 break;
meillo@10 352 case 'i':
meillo@10 353 /* ignored */
meillo@10 354 mta_mode = MODE_BI;
meillo@10 355 break;
meillo@10 356 case 's':
meillo@10 357 mta_mode = MODE_SMTP;
meillo@10 358 break;
meillo@10 359 case 'p':
meillo@10 360 mta_mode = MODE_LIST;
meillo@10 361 break;
meillo@10 362 case 'V':
meillo@10 363 mta_mode = MODE_VERSION;
meillo@10 364 break;
meillo@10 365 default:
meillo@10 366 fprintf(stderr, "unrecognized option '%s'\n", argv[arg]);
meillo@10 367 exit(EXIT_FAILURE);
meillo@10 368 }
meillo@10 369 break;
meillo@10 370 case 'B':
meillo@10 371 /* we ignore this and throw the argument away */
meillo@10 372 get_optarg(argv, argc, &arg, &pos);
meillo@10 373 break;
meillo@10 374 case 'C':
meillo@10 375 if (!(conf_file = get_optarg(argv, argc, &arg, &pos))) {
meillo@10 376 fprintf(stderr, "-C requires a filename as argument.\n");
meillo@10 377 exit(EXIT_FAILURE);
meillo@10 378 }
meillo@10 379 break;
meillo@10 380 case 'F':
meillo@10 381 {
meillo@10 382 full_sender_name = get_optarg(argv, argc, &arg, &pos);
meillo@10 383 if (!full_sender_name) {
meillo@10 384 fprintf(stderr, "-F requires a name as an argument\n");
meillo@10 385 exit(EXIT_FAILURE);
meillo@10 386 }
meillo@10 387 }
meillo@10 388 break;
meillo@10 389 case 'd':
meillo@10 390 if (getuid() == 0) {
meillo@10 391 char *lvl = get_optarg(argv, argc, &arg, &pos);
meillo@10 392 if (lvl)
meillo@10 393 debug_level = atoi(lvl);
meillo@10 394 else {
meillo@10 395 fprintf(stderr, "-d requires a number as an argument.\n");
meillo@10 396 exit(EXIT_FAILURE);
meillo@10 397 }
meillo@10 398 } else {
meillo@10 399 fprintf(stderr, "only root may set the debug level.\n");
meillo@10 400 exit(EXIT_FAILURE);
meillo@10 401 }
meillo@10 402 break;
meillo@10 403 case 'f':
meillo@10 404 /* set return path */
meillo@10 405 {
meillo@10 406 gchar *address;
meillo@10 407 address = get_optarg(argv, argc, &arg, &pos);
meillo@10 408 if (address) {
meillo@10 409 f_address = g_strdup(address);
meillo@10 410 } else {
meillo@10 411 fprintf(stderr, "-f requires an address as an argument\n");
meillo@10 412 exit(EXIT_FAILURE);
meillo@10 413 }
meillo@10 414 }
meillo@10 415 break;
meillo@10 416 case 'i':
meillo@10 417 if (argv[arg][pos] == 0) {
meillo@10 418 opt_i = TRUE;
meillo@10 419 exit_failure = FALSE; /* may override -oem */
meillo@10 420 } else {
meillo@10 421 fprintf(stderr, "unrecognized option '%s'\n", argv[arg]);
meillo@10 422 exit(EXIT_FAILURE);
meillo@10 423 }
meillo@10 424 break;
meillo@10 425 case 'M':
meillo@10 426 {
meillo@10 427 mta_mode = MODE_MCMD;
meillo@10 428 M_cmd = g_strdup(&(argv[arg][pos]));
meillo@10 429 }
meillo@10 430 break;
meillo@10 431 case 'o':
meillo@10 432 switch (argv[arg][pos++]) {
meillo@10 433 case 'e':
meillo@10 434 if (argv[arg][pos++] == 'm') /* -oem */
meillo@10 435 if (!opt_i)
meillo@10 436 exit_failure = TRUE;
meillo@10 437 opt_oem = TRUE;
meillo@10 438 break;
meillo@10 439 case 'd':
meillo@10 440 if (argv[arg][pos] == 'b') /* -odb */
meillo@10 441 opt_odb = TRUE;
meillo@10 442 else if (argv[arg][pos] == 'q') /* -odq */
meillo@10 443 do_queue = TRUE;
meillo@10 444 break;
meillo@10 445 case 'i':
meillo@10 446 opt_i = TRUE;
meillo@10 447 exit_failure = FALSE; /* may override -oem */
meillo@10 448 break;
meillo@10 449 }
meillo@10 450 break;
meillo@10 451
meillo@10 452 case 'q':
meillo@10 453 {
meillo@10 454 gchar *optarg;
meillo@10 455
meillo@10 456 do_runq = TRUE;
meillo@10 457 mta_mode = MODE_RUNQUEUE;
meillo@10 458 if (argv[arg][pos] == 'o') {
meillo@10 459 pos++;
meillo@10 460 do_runq = FALSE;
meillo@10 461 do_runq_online = TRUE;
meillo@10 462 /* can be NULL, then we use online detection method */
meillo@10 463 route_name = get_optarg(argv, argc, &arg, &pos);
meillo@10 464 } else
meillo@10 465 if ((optarg = get_optarg(argv, argc, &arg, &pos))) {
meillo@10 466 mta_mode = MODE_DAEMON;
meillo@10 467 queue_interval = time_interval(optarg, &pos);
meillo@10 468 }
meillo@10 469 }
meillo@10 470 break;
meillo@10 471 case 't':
meillo@10 472 if (argv[arg][pos] == 0) {
meillo@10 473 opt_t = TRUE;
meillo@10 474 } else {
meillo@10 475 fprintf(stderr, "unrecognized option '%s'\n", argv[arg]);
meillo@10 476 exit(EXIT_FAILURE);
meillo@10 477 }
meillo@10 478 break;
meillo@10 479 case 'v':
meillo@10 480 do_verbose = TRUE;
meillo@10 481 break;
meillo@10 482 default:
meillo@10 483 fprintf(stderr, "unrecognized option '%s'\n", argv[arg]);
meillo@10 484 exit(EXIT_FAILURE);
meillo@10 485 }
meillo@10 486 } else {
meillo@10 487 if (argv[arg][pos + 1] == '-') {
meillo@10 488 if (argv[arg][pos + 2] != '\0') {
meillo@10 489 fprintf(stderr, "unrecognized option '%s'\n", argv[arg]);
meillo@10 490 exit(EXIT_FAILURE);
meillo@10 491 }
meillo@10 492 arg++;
meillo@10 493 }
meillo@10 494 break;
meillo@10 495 }
meillo@10 496 arg++;
meillo@0 497 }
meillo@0 498
meillo@10 499 if (mta_mode == MODE_VERSION) {
meillo@12 500 gchar *with_resolver = "";
meillo@12 501 gchar *with_auth = "";
meillo@12 502 gchar *with_ident = "";
meillo@0 503
meillo@0 504 #ifdef ENABLE_RESOLVER
meillo@10 505 with_resolver = " +resolver";
meillo@0 506 #endif
meillo@0 507 #ifdef ENABLE_AUTH
meillo@10 508 with_auth = " +auth";
meillo@0 509 #endif
meillo@0 510 #ifdef ENABLE_IDENT
meillo@10 511 with_ident = " +ident";
meillo@0 512 #endif
meillo@0 513
meillo@205 514 printf("%s %s%s%s%s\n", PACKAGE, VERSION, with_resolver, with_auth, with_ident);
meillo@0 515
meillo@10 516 exit(EXIT_SUCCESS);
meillo@10 517 }
meillo@0 518
meillo@10 519 /* initialize random generator */
meillo@10 520 srand(time(NULL));
meillo@10 521 /* ignore SIGPIPE signal */
meillo@10 522 signal(SIGPIPE, SIG_IGN);
meillo@0 523
meillo@73 524 /* close all possibly open file descriptors, except std{in,out,err} */
meillo@10 525 {
meillo@10 526 int i, max_fd = sysconf(_SC_OPEN_MAX);
meillo@0 527
meillo@10 528 if (max_fd <= 0)
meillo@10 529 max_fd = 64;
meillo@10 530 for (i = 3; i < max_fd; i++)
meillo@10 531 close(i);
meillo@10 532 }
meillo@0 533
meillo@10 534 init_conf();
meillo@0 535
meillo@10 536 /* if we are not privileged, and the config file was changed we
meillo@10 537 implicetely set the the run_as_user flag and give up all
meillo@10 538 privileges.
meillo@0 539
meillo@10 540 So it is possible for a user to run his own daemon without
meillo@10 541 breaking security.
meillo@10 542 */
meillo@10 543 if (strcmp(conf_file, CONF_FILE) != 0) {
meillo@10 544 if (conf.orig_uid != 0) {
meillo@10 545 conf.run_as_user = TRUE;
meillo@10 546 seteuid(conf.orig_uid);
meillo@10 547 setegid(conf.orig_gid);
meillo@10 548 setuid(conf.orig_uid);
meillo@10 549 setgid(conf.orig_gid);
meillo@10 550 }
meillo@10 551 }
meillo@0 552
meillo@155 553 conf.log_dir = LOG_DIR;
meillo@155 554 logopen();
meillo@155 555 if (!read_conf(conf_file)) {
meillo@155 556 logwrite(LOG_ALERT, "SHUTTING DOWN due to problems reading config\n");
meillo@155 557 exit(5);
meillo@155 558 }
meillo@155 559 logclose();
meillo@0 560
meillo@10 561 if (do_queue)
meillo@10 562 conf.do_queue = TRUE;
meillo@10 563 if (do_verbose)
meillo@10 564 conf.do_verbose = TRUE;
meillo@10 565 if (debug_level >= 0) /* if >= 0, it was given by argument */
meillo@10 566 conf.debug_level = debug_level;
meillo@0 567
meillo@46 568 /* It appears that changing to / ensures that we are never in
meillo@46 569 a directory which we cannot access. This situation could be
meillo@46 570 possible after changing identity.
meillo@46 571 Maybe we should only change to / if we not run as user, to
meillo@46 572 allow relative paths for log files in test setups for
meillo@46 573 instance.
meillo@46 574 */
meillo@10 575 chdir("/");
meillo@0 576
meillo@10 577 if (!conf.run_as_user) {
meillo@10 578 if (setgid(0) != 0) {
meillo@10 579 fprintf(stderr, "could not set gid to 0. Is the setuid bit set? : %s\n", strerror(errno));
meillo@10 580 exit(EXIT_FAILURE);
meillo@10 581 }
meillo@10 582 if (setuid(0) != 0) {
meillo@10 583 fprintf(stderr, "could not gain root privileges. Is the setuid bit set? : %s\n", strerror(errno));
meillo@10 584 exit(EXIT_FAILURE);
meillo@10 585 }
meillo@10 586 }
meillo@0 587
meillo@10 588 if (!logopen()) {
meillo@10 589 fprintf(stderr, "could not open log file\n");
meillo@10 590 exit(EXIT_FAILURE);
meillo@10 591 }
meillo@0 592
meillo@10 593 DEBUG(1) debugf("masqmail %s starting\n", VERSION);
meillo@0 594
meillo@10 595 DEBUG(5) {
meillo@10 596 gchar **str = argv;
meillo@10 597 debugf("args: \n");
meillo@10 598 while (*str) {
meillo@10 599 debugf("%s \n", *str);
meillo@10 600 str++;
meillo@10 601 }
meillo@10 602 }
meillo@10 603 DEBUG(5) debugf("queue_interval = %d\n", queue_interval);
meillo@0 604
meillo@10 605 if (f_address) {
meillo@10 606 return_path = create_address_qualified(f_address, TRUE, conf.host_name);
meillo@10 607 g_free(f_address);
meillo@10 608 if (!return_path) {
meillo@10 609 fprintf(stderr, "invalid RFC821 address: %s\n", f_address);
meillo@10 610 exit(EXIT_FAILURE);
meillo@10 611 }
meillo@10 612 }
meillo@10 613
meillo@10 614 switch (mta_mode) {
meillo@10 615 case MODE_DAEMON:
meillo@10 616 mode_daemon(do_listen, queue_interval, argv);
meillo@10 617 break;
meillo@10 618 case MODE_RUNQUEUE:
meillo@10 619 {
meillo@10 620 /* queue runs */
meillo@10 621 set_identity(conf.orig_uid, "queue run");
meillo@0 622
meillo@10 623 if (do_runq)
meillo@10 624 exit_code = queue_run() ? EXIT_SUCCESS : EXIT_FAILURE;
meillo@10 625
meillo@10 626 if (do_runq_online) {
meillo@10 627 if (route_name != NULL) {
meillo@10 628 conf.online_detect = g_strdup("argument");
meillo@10 629 set_online_name(route_name);
meillo@10 630 }
meillo@10 631 exit_code =
meillo@10 632 queue_run_online() ? EXIT_SUCCESS : EXIT_FAILURE;
meillo@10 633 }
meillo@10 634 }
meillo@10 635 break;
meillo@10 636
meillo@10 637 case MODE_SMTP:
meillo@10 638 mode_smtp();
meillo@10 639 break;
meillo@10 640
meillo@10 641 case MODE_LIST:
meillo@10 642 queue_list();
meillo@10 643 break;
meillo@10 644
meillo@10 645 case MODE_BI:
meillo@10 646 exit(EXIT_SUCCESS);
meillo@10 647 break; /* well... */
meillo@10 648
meillo@10 649 case MODE_MCMD:
meillo@10 650 if (strcmp(M_cmd, "rm") == 0) {
meillo@10 651 gboolean ok = FALSE;
meillo@10 652
meillo@10 653 set_euidgid(conf.mail_uid, conf.mail_gid, NULL, NULL);
meillo@10 654
meillo@10 655 if (is_privileged_user(conf.orig_uid)) {
meillo@10 656 for (; arg < argc; arg++) {
meillo@10 657 if (queue_delete(argv[arg]))
meillo@10 658 ok = TRUE;
meillo@10 659 }
meillo@10 660 } else {
meillo@10 661 struct passwd *pw = getpwuid(conf.orig_uid);
meillo@10 662 if (pw) {
meillo@10 663 for (; arg < argc; arg++) {
meillo@10 664 message *msg = msg_spool_read(argv[arg], FALSE);
meillo@10 665 #ifdef ENABLE_IDENT
meillo@10 666 if (((msg->received_host == NULL) && (msg->received_prot == PROT_LOCAL))
meillo@10 667 || is_in_netlist(msg->received_host, conf.ident_trusted_nets)) {
meillo@10 668 #else
meillo@10 669 if ((msg->received_host == NULL) && (msg->received_prot == PROT_LOCAL)) {
meillo@10 670 #endif
meillo@10 671 if (msg->ident) {
meillo@10 672 if (strcmp(pw->pw_name, msg->ident) == 0) {
meillo@10 673 if (queue_delete(argv[arg]))
meillo@10 674 ok = TRUE;
meillo@10 675 } else {
meillo@10 676 fprintf(stderr, "you do not own message id %s\n", argv[arg]);
meillo@10 677 }
meillo@10 678 } else
meillo@10 679 fprintf(stderr, "message %s does not have an ident.\n", argv[arg]);
meillo@10 680 } else {
meillo@10 681 fprintf(stderr, "message %s was not received locally or from a trusted network.\n", argv[arg]);
meillo@10 682 }
meillo@10 683 }
meillo@10 684 } else {
meillo@10 685 fprintf(stderr, "could not find a passwd entry for uid %d: %s\n", conf.orig_uid, strerror(errno));
meillo@10 686 }
meillo@10 687 }
meillo@10 688 exit(ok ? EXIT_SUCCESS : EXIT_FAILURE);
meillo@10 689 } else {
meillo@10 690 fprintf(stderr, "unknown command %s\n", M_cmd);
meillo@10 691 exit(EXIT_FAILURE);
meillo@10 692 }
meillo@10 693 break;
meillo@10 694
meillo@10 695 case MODE_ACCEPT:
meillo@10 696 {
meillo@107 697 guint accept_flags = (opt_t ? ACC_DEL_RCPTS | ACC_RCPT_FROM_HEAD : 0)
meillo@110 698 | (opt_i ? ACC_DOT_IGNORE : ACC_NODOT_RELAX);
meillo@10 699 mode_accept(return_path, full_sender_name, accept_flags, &(argv[arg]), argc - arg);
meillo@10 700 exit(exit_failure ? EXIT_FAILURE : EXIT_SUCCESS);
meillo@10 701 }
meillo@10 702 break;
meillo@10 703 case MODE_NONE:
meillo@10 704 break;
meillo@10 705 default:
meillo@10 706 fprintf(stderr, "unknown mode: %d\n", mta_mode);
meillo@10 707 break;
meillo@0 708 }
meillo@0 709
meillo@10 710 logclose();
meillo@0 711
meillo@10 712 exit(exit_code);
meillo@0 713 }