4 This file is part of avahi.
6 avahi is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as
8 published by the Free Software Foundation; either version 2.1 of the
9 License, or (at your option) any later version.
11 avahi is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
14 Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with avahi; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
41 #include <sys/resource.h>
42 #include <sys/socket.h>
44 #include <libdaemon/dfork.h>
45 #include <libdaemon/dsignal.h>
46 #include <libdaemon/dlog.h>
47 #include <libdaemon/dpid.h>
49 #include <avahi-common/malloc.h>
50 #include <avahi-common/simple-watch.h>
51 #include <avahi-common/error.h>
52 #include <avahi-common/alternative.h>
54 #include <avahi-core/core.h>
55 #include <avahi-core/publish.h>
56 #include <avahi-core/dns-srv-rr.h>
57 #include <avahi-core/log.h>
60 #include "simple-protocol.h"
61 #include "static-services.h"
62 #include "ini-file-parser.h"
65 #include "dbus-protocol.h"
68 AvahiServer *avahi_server = NULL;
69 AvahiSimplePoll *simple_poll_api = NULL;
81 AvahiServerConfig server_config;
82 DaemonCommand command;
87 int fail_on_missing_dbus;
89 int publish_resolv_conf;
90 char ** publish_dns_servers;
94 int rlimit_as_set, rlimit_core_set, rlimit_data_set, rlimit_fsize_set, rlimit_nofile_set, rlimit_stack_set;
95 rlim_t rlimit_as, rlimit_core, rlimit_data, rlimit_fsize, rlimit_nofile, rlimit_stack;
103 #define RESOLV_CONF "/etc/resolv.conf"
105 static AvahiSEntryGroup *dns_servers_entry_group = NULL;
106 static AvahiSEntryGroup *resolv_conf_entry_group = NULL;
108 static char **resolv_conf = NULL;
110 static DaemonConfig config;
112 static int has_prefix(const char *s, const char *prefix) {
117 return strlen(s) >= l && strncmp(s, prefix, l) == 0;
120 static int load_resolv_conf(void) {
125 avahi_strfreev(resolv_conf);
128 if (!(f = fopen(RESOLV_CONF, "r"))) {
129 avahi_log_warn("Failed to open "RESOLV_CONF".");
133 resolv_conf = avahi_new0(char*, AVAHI_WIDE_AREA_SERVERS_MAX+1);
135 while (!feof(f) && i < AVAHI_WIDE_AREA_SERVERS_MAX) {
139 if (!(fgets(ln, sizeof(ln), f)))
142 ln[strcspn(ln, "\r\n#")] = 0;
143 p = ln + strspn(ln, "\t ");
145 if (has_prefix(p, "nameserver")) {
147 p += strspn(p, "\t ");
148 p[strcspn(p, "\t ")] = 0;
149 resolv_conf[i++] = avahi_strdup(p);
158 avahi_strfreev(resolv_conf);
168 static AvahiSEntryGroup* add_dns_servers(AvahiServer *s, AvahiSEntryGroup* g, char **l) {
175 g = avahi_s_entry_group_new(s, NULL, NULL);
177 assert(avahi_s_entry_group_is_empty(g));
179 for (p = l; *p; p++) {
182 if (!avahi_address_parse(*p, AVAHI_PROTO_UNSPEC, &a))
183 avahi_log_warn("Failed to parse address '%s', ignoring.", *p);
185 if (avahi_server_add_dns_server_address(s, g, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, 0, NULL, AVAHI_DNS_SERVER_RESOLVE, &a, 53) < 0) {
186 avahi_s_entry_group_free(g);
187 avahi_log_error("Failed to add DNS server address: %s", avahi_strerror(avahi_server_errno(s)));
192 avahi_s_entry_group_commit(g);
197 static void remove_dns_server_entry_groups(void) {
199 if (resolv_conf_entry_group)
200 avahi_s_entry_group_reset(resolv_conf_entry_group);
202 if (dns_servers_entry_group)
203 avahi_s_entry_group_reset(dns_servers_entry_group);
206 static void update_wide_area_servers(void) {
207 AvahiAddress a[AVAHI_WIDE_AREA_SERVERS_MAX];
211 for (p = resolv_conf; *p && n < AVAHI_WIDE_AREA_SERVERS_MAX; p++) {
212 if (!avahi_address_parse(*p, AVAHI_PROTO_UNSPEC, &a[n]))
213 avahi_log_warn("Failed to parse address '%s', ignoring.", *p);
218 avahi_server_set_wide_area_servers(avahi_server, a, n);
221 static void server_callback(AvahiServer *s, AvahiServerState state, void *userdata) {
222 DaemonConfig *c = userdata;
227 /* This function is possibly called before the global variable
228 * avahi_server has been set, therefore we do it explicitly */
233 if (c->enable_dbus && state != AVAHI_SERVER_INVALID && state != AVAHI_SERVER_FAILURE)
234 dbus_protocol_server_state_changed(state);
238 case AVAHI_SERVER_RUNNING:
239 avahi_log_info("Server startup complete. Host name is %s. Local service cookie is %u.", avahi_server_get_host_name_fqdn(s), avahi_server_get_local_service_cookie(s));
240 static_service_add_to_server();
242 remove_dns_server_entry_groups();
244 if (c->publish_resolv_conf && resolv_conf && resolv_conf[0])
245 resolv_conf_entry_group = add_dns_servers(s, resolv_conf_entry_group, resolv_conf);
247 if (c->publish_dns_servers && c->publish_dns_servers[0])
248 dns_servers_entry_group = add_dns_servers(s, dns_servers_entry_group, c->publish_dns_servers);
250 simple_protocol_restart_queries();
253 case AVAHI_SERVER_COLLISION: {
256 static_service_remove_from_server();
258 remove_dns_server_entry_groups();
260 n = avahi_alternative_host_name(avahi_server_get_host_name(s));
261 avahi_log_warn("Host name conflict, retrying with <%s>", n);
262 avahi_server_set_host_name(s, n);
267 case AVAHI_SERVER_FAILURE:
269 avahi_log_error("Server error: %s", avahi_strerror(avahi_server_errno(s)));
270 avahi_simple_poll_quit(simple_poll_api);
273 case AVAHI_SERVER_REGISTERING:
274 case AVAHI_SERVER_INVALID:
280 static void help(FILE *f, const char *argv0) {
283 " -h --help Show this help\n"
284 " -D --daemonize Daemonize after startup (implies -s)\n"
285 " -s --syslog Write log messages to syslog(3) instead of STDERR\n"
286 " -k --kill Kill a running daemon\n"
287 " -r --reload Request a running daemon to reload static services\n"
288 " -c --check Return 0 if a daemon is already running\n"
289 " -V --version Show version\n"
290 " -f --file=FILE Load the specified configuration file instead of\n"
291 " "AVAHI_CONFIG_FILE"\n"
292 " --no-rlimits Don't enforce resource limits\n"
293 " --no-drop-root Don't drop privileges\n"
294 " --debug Increase verbosity\n",
299 static int parse_command_line(DaemonConfig *c, int argc, char *argv[]) {
303 OPTION_NO_RLIMITS = 256,
308 static const struct option long_options[] = {
309 { "help", no_argument, NULL, 'h' },
310 { "daemonize", no_argument, NULL, 'D' },
311 { "kill", no_argument, NULL, 'k' },
312 { "version", no_argument, NULL, 'V' },
313 { "file", required_argument, NULL, 'f' },
314 { "reload", no_argument, NULL, 'r' },
315 { "check", no_argument, NULL, 'c' },
316 { "syslog", no_argument, NULL, 's' },
317 { "no-rlimits", no_argument, NULL, OPTION_NO_RLIMITS },
318 { "no-drop-root", no_argument, NULL, OPTION_NO_DROP_ROOT },
319 { "debug", no_argument, NULL, OPTION_DEBUG },
326 while ((o = getopt_long(argc, argv, "hDkVf:rcs", long_options, NULL)) >= 0) {
333 c->command = DAEMON_HELP;
339 c->command = DAEMON_KILL;
342 c->command = DAEMON_VERSION;
345 avahi_free(c->config_file);
346 c->config_file = avahi_strdup(optarg);
349 c->command = DAEMON_RELOAD;
352 c->command = DAEMON_CHECK;
354 case OPTION_NO_RLIMITS:
357 case OPTION_NO_DROP_ROOT:
364 fprintf(stderr, "Invalid command line argument: %c\n", o);
370 fprintf(stderr, "Too many arguments\n");
377 static int is_yes(const char *s) {
380 return *s == 'y' || *s == 'Y';
383 static int load_config_file(DaemonConfig *c) {
386 AvahiIniFileGroup *g;
390 if (!(f = avahi_ini_file_load(c->config_file ? c->config_file : AVAHI_CONFIG_FILE)))
393 for (g = f->groups; g; g = g->groups_next) {
395 if (strcasecmp(g->name, "server") == 0) {
398 for (p = g->pairs; p; p = p->pairs_next) {
400 if (strcasecmp(p->key, "host-name") == 0) {
401 avahi_free(c->server_config.host_name);
402 c->server_config.host_name = avahi_strdup(p->value);
403 } else if (strcasecmp(p->key, "domain-name") == 0) {
404 avahi_free(c->server_config.domain_name);
405 c->server_config.domain_name = avahi_strdup(p->value);
406 } else if (strcasecmp(p->key, "use-ipv4") == 0)
407 c->server_config.use_ipv4 = is_yes(p->value);
408 else if (strcasecmp(p->key, "use-ipv6") == 0)
409 c->server_config.use_ipv6 = is_yes(p->value);
410 else if (strcasecmp(p->key, "check-response-ttl") == 0)
411 c->server_config.check_response_ttl = is_yes(p->value);
412 else if (strcasecmp(p->key, "use-iff-running") == 0)
413 c->server_config.use_iff_running = is_yes(p->value);
414 else if (strcasecmp(p->key, "disallow-other-stacks") == 0)
415 c->server_config.disallow_other_stacks = is_yes(p->value);
416 else if (strcasecmp(p->key, "enable-dbus") == 0) {
418 if (*(p->value) == 'w' || *(p->value) == 'W') {
419 c->fail_on_missing_dbus = 0;
421 } else if (*(p->value) == 'y' || *(p->value) == 'Y') {
422 c->fail_on_missing_dbus = 1;
427 } else if (strcasecmp(p->key, "drop-root") == 0)
428 c->drop_root = is_yes(p->value);
429 else if (strcasecmp(p->key, "add-service-cookie") == 0)
430 c->server_config.add_service_cookie = is_yes(p->value);
432 avahi_log_error("Invalid configuration key \"%s\" in group \"%s\"\n", p->key, g->name);
437 } else if (strcasecmp(g->name, "publish") == 0) {
440 for (p = g->pairs; p; p = p->pairs_next) {
442 if (strcasecmp(p->key, "publish-addresses") == 0)
443 c->server_config.publish_addresses = is_yes(p->value);
444 else if (strcasecmp(p->key, "publish-hinfo") == 0)
445 c->server_config.publish_hinfo = is_yes(p->value);
446 else if (strcasecmp(p->key, "publish-workstation") == 0)
447 c->server_config.publish_workstation = is_yes(p->value);
448 else if (strcasecmp(p->key, "publish-domain") == 0)
449 c->server_config.publish_domain = is_yes(p->value);
450 else if (strcasecmp(p->key, "publish-resolv-conf-dns-servers") == 0)
451 c->publish_resolv_conf = is_yes(p->value);
452 else if (strcasecmp(p->key, "publish-dns-servers") == 0) {
453 avahi_strfreev(c->publish_dns_servers);
454 c->publish_dns_servers = avahi_split_csv(p->value);
456 avahi_log_error("Invalid configuration key \"%s\" in group \"%s\"\n", p->key, g->name);
461 } else if (strcasecmp(g->name, "wide-area") == 0) {
464 for (p = g->pairs; p; p = p->pairs_next) {
466 if (strcasecmp(p->key, "enable-wide-area") == 0)
467 c->server_config.enable_wide_area = is_yes(p->value);
469 avahi_log_error("Invalid configuration key \"%s\" in group \"%s\"\n", p->key, g->name);
474 } else if (strcasecmp(g->name, "reflector") == 0) {
477 for (p = g->pairs; p; p = p->pairs_next) {
479 if (strcasecmp(p->key, "enable-reflector") == 0)
480 c->server_config.enable_reflector = is_yes(p->value);
481 else if (strcasecmp(p->key, "reflect-ipv") == 0)
482 c->server_config.reflect_ipv = is_yes(p->value);
484 avahi_log_error("Invalid configuration key \"%s\" in group \"%s\"\n", p->key, g->name);
489 } else if (strcasecmp(g->name, "rlimits") == 0) {
492 for (p = g->pairs; p; p = p->pairs_next) {
494 if (strcasecmp(p->key, "rlimit-as") == 0) {
495 c->rlimit_as_set = 1;
496 c->rlimit_as = atoi(p->value);
497 } else if (strcasecmp(p->key, "rlimit-core") == 0) {
498 c->rlimit_core_set = 1;
499 c->rlimit_core = atoi(p->value);
500 } else if (strcasecmp(p->key, "rlimit-data") == 0) {
501 c->rlimit_data_set = 1;
502 c->rlimit_data = atoi(p->value);
503 } else if (strcasecmp(p->key, "rlimit-fsize") == 0) {
504 c->rlimit_fsize_set = 1;
505 c->rlimit_fsize = atoi(p->value);
506 } else if (strcasecmp(p->key, "rlimit-nofile") == 0) {
507 c->rlimit_nofile_set = 1;
508 c->rlimit_nofile = atoi(p->value);
509 } else if (strcasecmp(p->key, "rlimit-stack") == 0) {
510 c->rlimit_stack_set = 1;
511 c->rlimit_stack = atoi(p->value);
513 } else if (strcasecmp(p->key, "rlimit-nproc") == 0) {
514 c->rlimit_nproc_set = 1;
515 c->rlimit_nproc = atoi(p->value);
518 avahi_log_error("Invalid configuration key \"%s\" in group \"%s\"\n", p->key, g->name);
525 avahi_log_error("Invalid configuration file group \"%s\".\n", g->name);
535 avahi_ini_file_free(f);
540 static void log_function(AvahiLogLevel level, const char *txt) {
542 static const int log_level_map[] = {
550 assert(level < AVAHI_LOG_LEVEL_MAX);
553 if (!config.debug && level == AVAHI_LOG_DEBUG)
556 daemon_log(log_level_map[level], "%s", txt);
559 static void dump(const char *text, AVAHI_GCC_UNUSED void* userdata) {
560 avahi_log_info("%s", text);
563 static void signal_callback(AvahiWatch *watch, AVAHI_GCC_UNUSED int fd, AVAHI_GCC_UNUSED AvahiWatchEvent event, AVAHI_GCC_UNUSED void *userdata) {
565 const AvahiPoll *poll_api;
568 assert(simple_poll_api);
570 poll_api = avahi_simple_poll_get(simple_poll_api);
572 if ((sig = daemon_signal_next()) <= 0) {
573 avahi_log_error("daemon_signal_next() failed");
574 poll_api->watch_free(watch);
584 sig == SIGINT ? "SIGINT" :
585 (sig == SIGQUIT ? "SIGQUIT" : "SIGTERM"));
586 avahi_simple_poll_quit(simple_poll_api);
590 avahi_log_info("Got SIGHUP, reloading.");
591 static_service_load();
592 static_service_add_to_server();
594 if (resolv_conf_entry_group)
595 avahi_s_entry_group_reset(resolv_conf_entry_group);
599 update_wide_area_servers();
601 if (config.publish_resolv_conf && resolv_conf && resolv_conf[0])
602 resolv_conf_entry_group = add_dns_servers(avahi_server, resolv_conf_entry_group, resolv_conf);
607 avahi_log_info("Got SIGUSR1, dumping record data.");
608 avahi_server_dump(avahi_server, dump, NULL);
612 avahi_log_warn("Got spurious signal, ignoring.");
617 static int run_server(DaemonConfig *c) {
620 const AvahiPoll *poll_api = NULL;
621 AvahiWatch *sig_watch = NULL;
625 if (!(simple_poll_api = avahi_simple_poll_new())) {
626 avahi_log_error("Failed to create main loop object.");
630 poll_api = avahi_simple_poll_get(simple_poll_api);
632 if (daemon_signal_init(SIGINT, SIGQUIT, SIGHUP, SIGTERM, SIGUSR1, 0) < 0) {
633 avahi_log_error("Could not register signal handlers (%s).", strerror(errno));
637 if (!(sig_watch = poll_api->watch_new(poll_api, daemon_signal_fd(), AVAHI_WATCH_IN, signal_callback, simple_poll_api))) {
638 avahi_log_error( "Failed to create signal watcher");
642 if (simple_protocol_setup(poll_api) < 0)
644 if (c->enable_dbus) {
646 if (dbus_protocol_setup(poll_api) < 0) {
648 if (c->fail_on_missing_dbus)
651 avahi_log_warn("WARNING: Failed to contact D-BUS daemon, disabling D-BUS support.");
655 avahi_log_warn("WARNING: We are configured to enable D-BUS but it was not compiled in.");
661 static_service_load();
663 if (!(avahi_server = avahi_server_new(poll_api, &c->server_config, server_callback, c, &error))) {
664 avahi_log_error("Failed to create server: %s", avahi_strerror(error));
668 update_wide_area_servers();
671 daemon_retval_send(0);
674 if ((r = avahi_simple_poll_iterate(simple_poll_api, -1)) < 0) {
676 /* We handle signals through an FD, so let's continue */
680 avahi_log_error("poll(): %s", strerror(errno));
690 static_service_remove_from_server();
691 static_service_free_all();
692 remove_dns_server_entry_groups();
694 simple_protocol_shutdown();
698 dbus_protocol_shutdown();
702 avahi_server_free(avahi_server);
706 daemon_signal_done();
709 poll_api->watch_free(sig_watch);
711 if (simple_poll_api) {
712 avahi_simple_poll_free(simple_poll_api);
713 simple_poll_api = NULL;
716 if (r != 0 && c->daemonize)
717 daemon_retval_send(1);
722 #define set_env(key, value) putenv(avahi_strdup_printf("%s=%s", (key), (value)))
724 static int drop_root(void) {
729 if (!(pw = getpwnam(AVAHI_USER))) {
730 avahi_log_error( "Failed to find user '"AVAHI_USER"'.");
734 if (!(gr = getgrnam(AVAHI_GROUP))) {
735 avahi_log_error( "Failed to find group '"AVAHI_GROUP"'.");
739 avahi_log_info("Found user '"AVAHI_USER"' (UID %lu) and group '"AVAHI_GROUP"' (GID %lu).", (unsigned long) pw->pw_uid, (unsigned long) gr->gr_gid);
741 if (initgroups(AVAHI_USER, gr->gr_gid) != 0) {
742 avahi_log_error("Failed to change group list: %s", strerror(errno));
746 #if defined(HAVE_SETRESGID)
747 r = setresgid(gr->gr_gid, gr->gr_gid, gr->gr_gid);
748 #elif defined(HAVE_SETEGID)
749 if ((r = setgid(gr->gr_gid)) >= 0)
750 r = setegid(gr->gr_gid);
751 #elif defined(HAVE_SETREGID)
752 r = setregid(gr->gr_gid, gr->gr_gid);
754 #error "No API to drop priviliges"
758 avahi_log_error("Failed to change GID: %s", strerror(errno));
762 #if defined(HAVE_SETRESUID)
763 r = setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid);
764 #elif defined(HAVE_SETEUID)
765 if ((r = setuid(pw->pw_uid)) >= 0)
766 r = seteuid(pw->pw_uid);
767 #elif defined(HAVE_SETREUID)
768 r = setreuid(pw->pw_uid, pw->pw_uid);
770 #error "No API to drop priviliges"
774 avahi_log_error("Failed to change UID: %s", strerror(errno));
778 set_env("USER", pw->pw_name);
779 set_env("LOGNAME", pw->pw_name);
780 set_env("HOME", pw->pw_dir);
782 avahi_log_info("Successfully dropped root privileges.");
787 static const char* pid_file_proc(void) {
788 return AVAHI_DAEMON_RUNTIME_DIR"/pid";
791 static int make_runtime_dir(void) {
799 if (!(pw = getpwnam(AVAHI_USER))) {
800 avahi_log_error( "Failed to find user '"AVAHI_USER"'.");
804 if (!(gr = getgrnam(AVAHI_GROUP))) {
805 avahi_log_error( "Failed to find group '"AVAHI_GROUP"'.");
812 if (mkdir(AVAHI_DAEMON_RUNTIME_DIR, 0755) < 0 && errno != EEXIST) {
813 avahi_log_error("mkdir(\""AVAHI_DAEMON_RUNTIME_DIR"\"): %s", strerror(errno));
817 chown(AVAHI_DAEMON_RUNTIME_DIR, pw->pw_uid, gr->gr_gid);
819 if (stat(AVAHI_DAEMON_RUNTIME_DIR, &st) < 0) {
820 avahi_log_error("stat(): %s\n", strerror(errno));
824 if (!S_ISDIR(st.st_mode) || st.st_uid != pw->pw_uid || st.st_gid != gr->gr_gid) {
825 avahi_log_error("Failed to create runtime directory "AVAHI_DAEMON_RUNTIME_DIR".");
837 static void set_one_rlimit(int resource, rlim_t limit, const char *name) {
839 rl.rlim_cur = rl.rlim_max = limit;
841 if (setrlimit(resource, &rl) < 0)
842 avahi_log_warn("setrlimit(%s, {%u, %u}) failed: %s", name, (unsigned) limit, (unsigned) limit, strerror(errno));
845 static void enforce_rlimits(void) {
847 if (config.rlimit_as_set)
848 set_one_rlimit(RLIMIT_AS, config.rlimit_as, "RLIMIT_AS");
850 if (config.rlimit_core_set)
851 set_one_rlimit(RLIMIT_CORE, config.rlimit_core, "RLIMIT_CORE");
852 if (config.rlimit_data_set)
853 set_one_rlimit(RLIMIT_DATA, config.rlimit_data, "RLIMIT_DATA");
854 if (config.rlimit_fsize_set)
855 set_one_rlimit(RLIMIT_FSIZE, config.rlimit_fsize, "RLIMIT_FSIZE");
856 if (config.rlimit_nofile_set)
857 set_one_rlimit(RLIMIT_NOFILE, config.rlimit_nofile, "RLIMIT_NOFILE");
858 if (config.rlimit_stack_set)
859 set_one_rlimit(RLIMIT_STACK, config.rlimit_stack, "RLIMIT_STACK");
861 if (config.rlimit_nproc_set)
862 set_one_rlimit(RLIMIT_NPROC, config.rlimit_nproc, "RLIMIT_NPROC");
865 #ifdef RLIMIT_MEMLOCK
866 /* We don't need locked memory */
867 set_one_rlimit(RLIMIT_MEMLOCK, 0, "RLIMIT_MEMLOCK");
871 #define RANDOM_DEVICE "/dev/urandom"
873 static void init_rand_seed(void) {
877 /* Try to initialize seed from /dev/urandom, to make it a little
878 * less predictable, and to make sure that multiple machines
879 * booted at the same time choose different random seeds. */
880 if ((fd = open(RANDOM_DEVICE, O_RDONLY)) >= 0) {
881 read(fd, &seed, sizeof(seed));
885 /* If the initialization failed by some reason, we add the time to the seed*/
886 seed |= (unsigned) time(NULL);
891 int main(int argc, char *argv[]) {
894 int wrote_pid_file = 0;
896 avahi_set_log_function(log_function);
900 avahi_server_config_init(&config.server_config);
901 config.command = DAEMON_RUN;
902 config.daemonize = 0;
903 config.config_file = NULL;
905 config.enable_dbus = 1;
906 config.fail_on_missing_dbus = 1;
908 config.enable_dbus = 0;
909 config.fail_on_missing_dbus = 0;
911 config.drop_root = 1;
912 config.publish_dns_servers = NULL;
913 config.publish_resolv_conf = 0;
914 config.use_syslog = 0;
915 config.no_rlimits = 0;
918 config.rlimit_as_set = 0;
919 config.rlimit_core_set = 0;
920 config.rlimit_data_set = 0;
921 config.rlimit_fsize_set = 0;
922 config.rlimit_nofile_set = 0;
923 config.rlimit_stack_set = 0;
925 config.rlimit_nproc_set = 0;
928 if ((argv0 = strrchr(argv[0], '/')))
933 daemon_pid_file_ident = (const char *) argv0;
934 daemon_log_ident = (char*) argv0;
935 daemon_pid_file_proc = pid_file_proc;
937 if (parse_command_line(&config, argc, argv) < 0)
940 if (config.command == DAEMON_HELP) {
943 } else if (config.command == DAEMON_VERSION) {
944 printf("%s "PACKAGE_VERSION"\n", argv0);
946 } else if (config.command == DAEMON_KILL) {
947 if (daemon_pid_file_kill_wait(SIGTERM, 5) < 0) {
948 avahi_log_warn("Failed to kill daemon: %s", strerror(errno));
954 } else if (config.command == DAEMON_RELOAD) {
955 if (daemon_pid_file_kill(SIGHUP) < 0) {
956 avahi_log_warn("Failed to kill daemon: %s", strerror(errno));
962 } else if (config.command == DAEMON_CHECK)
963 r = (daemon_pid_file_is_running() >= 0) ? 0 : 1;
964 else if (config.command == DAEMON_RUN) {
967 if (getuid() != 0 && config.drop_root) {
968 avahi_log_error("This program is intended to be run as root.");
972 if ((pid = daemon_pid_file_is_running()) >= 0) {
973 avahi_log_error("Daemon already running on PID %u", pid);
977 if (load_config_file(&config) < 0)
980 if (config.daemonize) {
981 daemon_retval_init();
983 if ((pid = daemon_fork()) < 0)
989 if ((ret = daemon_retval_wait(20)) < 0) {
990 avahi_log_error("Could not receive return value from daemon process.");
1001 if (config.use_syslog || config.daemonize)
1002 daemon_log_use = DAEMON_LOG_SYSLOG;
1004 if (make_runtime_dir() < 0)
1007 if (config.drop_root) {
1008 if (drop_root() < 0)
1012 if (daemon_pid_file_create() < 0) {
1013 avahi_log_error("Failed to create PID file: %s", strerror(errno));
1015 if (config.daemonize)
1016 daemon_retval_send(1);
1021 if (!config.no_rlimits)
1026 avahi_log_info("%s "PACKAGE_VERSION" starting up.", argv0);
1028 if (run_server(&config) == 0)
1034 if (config.daemonize)
1035 daemon_retval_done();
1037 avahi_server_config_free(&config.server_config);
1038 avahi_free(config.config_file);
1039 avahi_strfreev(config.publish_dns_servers);
1040 avahi_strfreev(resolv_conf);
1043 daemon_pid_file_remove();