X-Git-Url: http://git.meshlink.io/?a=blobdiff_plain;f=avahi-daemon%2Fmain.c;h=480753e59a14cbb036aed066a6fbd9ab2eda3296;hb=e63a65b3955b173a3e8d6b78c6377a518a9922d6;hp=9a02391da8283270994446e9b632fa43137ff649;hpb=34a736c9ba029dd6bde61c3afba175e206a0a736;p=catta diff --git a/avahi-daemon/main.c b/avahi-daemon/main.c index 9a02391..480753e 100644 --- a/avahi-daemon/main.c +++ b/avahi-daemon/main.c @@ -23,142 +23,799 @@ #include #endif +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + #include +#include + +#include "main.h" +#include "simple-protocol.h" +#include "dbus-protocol.h" +#include "static-services.h" + +AvahiServer *avahi_server = NULL; + +typedef enum { + DAEMON_RUN, + DAEMON_KILL, + DAEMON_VERSION, + DAEMON_HELP, + DAEMON_RELOAD, + DAEMON_CHECK +} DaemonCommand; + +typedef struct { + AvahiServerConfig server_config; + DaemonCommand command; + gboolean daemonize; + gchar *config_file; + gboolean enable_dbus; + gboolean drop_root; + gboolean publish_resolv_conf; + gchar ** publish_dns_servers; +} DaemonConfig; + +#define RESOLV_CONF "/etc/resolv.conf" + +static AvahiEntryGroup *dns_servers_entry_group = NULL; +static AvahiEntryGroup *resolv_conf_entry_group = NULL; + +static gchar **resolv_conf = NULL; + +static DaemonConfig config; + +#define MAX_NAME_SERVERS 10 + +static gint load_resolv_conf(const DaemonConfig *c) { + gint ret = -1; + FILE *f; + gint i = 0; + + g_strfreev(resolv_conf); + resolv_conf = NULL; -#define DBUS_API_SUBJECT_TO_CHANGE -#include -#include + if (!c->publish_resolv_conf) + return 0; -#define DBUS_SERVICE_AVAHI "org.freedesktop.Avahi" + if (!(f = fopen(RESOLV_CONF, "r"))) { + avahi_log_warn("Failed to open "RESOLV_CONF"."); + goto finish; + } -static DBusHandlerResult -do_register (DBusConnection *conn, DBusMessage *message) -{ - DBusError error; - char *s; + resolv_conf = g_new0(gchar*, MAX_NAME_SERVERS+1); - dbus_error_init (&error); + while (!feof(f) && i < MAX_NAME_SERVERS) { + char ln[128]; + gchar *p; - dbus_message_get_args (message, &error, - DBUS_TYPE_STRING, &s, - DBUS_TYPE_INVALID); + if (!(fgets(ln, sizeof(ln), f))) + break; - if (dbus_error_is_set (&error)) - { - g_warning ("Error parsing register attempt"); - dbus_error_free (&error); + ln[strcspn(ln, "\r\n#")] = 0; + p = ln + strspn(ln, "\t "); + + if (g_str_has_prefix(p, "nameserver")) { + p += 10; + p += strspn(p, "\t "); + p[strcspn(p, "\t ")] = 0; + resolv_conf[i++] = strdup(p); + } + } - return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; - } + ret = 0; - g_message ("Register received from: %s", s); +finish: - return DBUS_HANDLER_RESULT_HANDLED; + if (ret != 0) { + g_strfreev(resolv_conf); + resolv_conf = NULL; + } + + if (f) + fclose(f); + + return ret; } -static DBusHandlerResult -signal_filter (DBusConnection *conn, DBusMessage *message, void *user_data) -{ - GMainLoop *loop = user_data; - DBusError error; +static AvahiEntryGroup* add_dns_servers(AvahiServer *s, AvahiEntryGroup* g, gchar **l) { + gchar **p; - dbus_error_init (&error); + g_assert(s); + g_assert(l); - g_message ("dbus: interface=%s, path=%s, member=%s", - dbus_message_get_interface (message), - dbus_message_get_path (message), - dbus_message_get_member (message)); + if (!g) + g = avahi_entry_group_new(s, NULL, NULL); - if (dbus_message_is_signal (message, - DBUS_INTERFACE_ORG_FREEDESKTOP_LOCAL, - "Disconnected")) - { - /* No, we shouldn't quit, but until we get somewhere - * usefull such that we can restore our state, we will */ - g_warning ("Disconnnected from d-bus"); + g_assert(avahi_entry_group_is_empty(g)); - g_main_loop_quit (loop); - return DBUS_HANDLER_RESULT_HANDLED; - } else if (dbus_message_is_method_call (message, DBUS_SERVICE_AVAHI, - "Register")) - { - return do_register (conn, message); - } else if (dbus_message_is_signal (message, - DBUS_INTERFACE_ORG_FREEDESKTOP_DBUS, - "ServiceAcquired")) - { - char *name; + for (p = l; *p; p++) { + AvahiAddress a; + + if (!avahi_address_parse(*p, AF_UNSPEC, &a)) + avahi_log_warn("Failed to parse address '%s', ignoring.", *p); + else + if (avahi_server_add_dns_server_address(s, g, -1, AF_UNSPEC, NULL, AVAHI_DNS_SERVER_RESOLVE, &a, 53) < 0) { + avahi_entry_group_free(g); + avahi_log_error("Failed to add DNS server address: %s", avahi_strerror(avahi_server_errno(s))); + return NULL; + } + } - dbus_message_get_args (message, &error, - DBUS_TYPE_STRING, &name, - DBUS_TYPE_INVALID); + avahi_entry_group_commit(g); - if (dbus_error_is_set (&error)) - { - g_warning ("Error parsing NameAcquired message"); - dbus_error_free (&error); + return g; +} + +static void remove_dns_server_entry_groups(void) { + + if (resolv_conf_entry_group) + avahi_entry_group_reset(resolv_conf_entry_group); + + if (dns_servers_entry_group) + avahi_entry_group_reset(dns_servers_entry_group); +} + +static void server_callback(AvahiServer *s, AvahiServerState state, gpointer userdata) { + DaemonConfig *c = userdata; + + g_assert(s); + g_assert(c); + +#ifdef ENABLE_DBUS + if (c->enable_dbus) + dbus_protocol_server_state_changed(state); +#endif - return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; - } + if (state == AVAHI_SERVER_RUNNING) { + avahi_log_info("Server startup complete. Host name is <%s>", avahi_server_get_host_name_fqdn(s)); + static_service_add_to_server(); - g_message ("dbus: ServiceAcquired (%s)", name); + remove_dns_server_entry_groups(); - return DBUS_HANDLER_RESULT_HANDLED; - } + if (resolv_conf && resolv_conf[0]) + resolv_conf_entry_group = add_dns_servers(s, resolv_conf_entry_group, resolv_conf); - g_message ("dbus: missed event"); + if (c->publish_dns_servers && c->publish_dns_servers[0]) + dns_servers_entry_group = add_dns_servers(s, dns_servers_entry_group, c->publish_dns_servers); - return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; + simple_protocol_restart_queries(); + + } else if (state == AVAHI_SERVER_COLLISION) { + gchar *n; + + static_service_remove_from_server(); + + remove_dns_server_entry_groups(); + + n = avahi_alternative_host_name(avahi_server_get_host_name(s)); + avahi_log_warn("Host name conflict, retrying with <%s>", n); + avahi_server_set_host_name(s, n); + g_free(n); + } } - -int main(int argc, char *argv[]) { - GMainLoop *loop = NULL; - DBusConnection *bus; - DBusError error; - loop = g_main_loop_new(NULL, FALSE); +static void help(FILE *f, const gchar *argv0) { + fprintf(f, + "%s [options]\n" + " -h --help Show this help\n" + " -D --daemonize Daemonize after startup\n" + " -k --kill Kill a running daemon\n" + " -r --reload Request a running daemon to reload static services\n" + " -c --check Return 0 if a daemon is already running\n" + " -V --version Show version\n" + " -f --file=FILE Load the specified configuration file instead of\n" + " "AVAHI_CONFIG_FILE"\n", + argv0); +} - dbus_error_init (&error); +static gint parse_command_line(DaemonConfig *c, int argc, char *argv[]) { + gint o; + + static const struct option const long_options[] = { + { "help", no_argument, NULL, 'h' }, + { "daemonize", no_argument, NULL, 'D' }, + { "kill", no_argument, NULL, 'k' }, + { "version", no_argument, NULL, 'V' }, + { "file", required_argument, NULL, 'f' }, + { "reload", no_argument, NULL, 'r' }, + { "check", no_argument, NULL, 'c' }, + }; + + g_assert(c); + + opterr = 0; + while ((o = getopt_long(argc, argv, "hDkVf:rc", long_options, NULL)) >= 0) { + + switch(o) { + case 'h': + c->command = DAEMON_HELP; + break; + case 'D': + c->daemonize = TRUE; + break; + case 'k': + c->command = DAEMON_KILL; + break; + case 'V': + c->command = DAEMON_VERSION; + break; + case 'f': + g_free(c->config_file); + c->config_file = g_strdup(optarg); + break; + case 'r': + c->command = DAEMON_RELOAD; + break; + case 'c': + c->command = DAEMON_CHECK; + break; + default: + fprintf(stderr, "Invalid command line argument: %c\n", o); + return -1; + } + } + if (optind < argc) { + fprintf(stderr, "Too many arguments\n"); + return -1; + } + + return 0; +} - bus = dbus_bus_get (DBUS_BUS_SYSTEM, &error); +static gboolean is_yes(const gchar *s) { + g_assert(s); + + return *s == 'y' || *s == 'Y'; +} - if (bus == NULL) - { - g_warning ("dbus_bus_get(): %s", error.message); - dbus_error_free (&error); +static gint load_config_file(DaemonConfig *c) { + int r = -1; + GKeyFile *f = NULL; + GError *err = NULL; + gchar **groups = NULL, **g, **keys = NULL, *v = NULL; - return -1; + g_assert(c); + + f = g_key_file_new(); + g_key_file_set_list_separator(f, ','); + + if (!g_key_file_load_from_file(f, c->config_file ? c->config_file : AVAHI_CONFIG_FILE, G_KEY_FILE_NONE, &err)) { + fprintf(stderr, "Unable to read config file: %s\n", err->message); + goto finish; + } + + groups = g_key_file_get_groups(f, NULL); + + for (g = groups; *g; g++) { + if (g_strcasecmp(*g, "server") == 0) { + gchar **k; + + keys = g_key_file_get_keys(f, *g, NULL, NULL); + + for (k = keys; *k; k++) { + + v = g_key_file_get_value(f, *g, *k, NULL); + + if (g_strcasecmp(*k, "host-name") == 0) { + g_free(c->server_config.host_name); + c->server_config.host_name = v; + v = NULL; + } else if (g_strcasecmp(*k, "domain-name") == 0) { + g_free(c->server_config.domain_name); + c->server_config.domain_name = v; + v = NULL; + } else if (g_strcasecmp(*k, "use-ipv4") == 0) + c->server_config.use_ipv4 = is_yes(v); + else if (g_strcasecmp(*k, "use-ipv6") == 0) + c->server_config.use_ipv6 = is_yes(v); + else if (g_strcasecmp(*k, "check-response-ttl") == 0) + c->server_config.check_response_ttl = is_yes(v); + else if (g_strcasecmp(*k, "use-iff-running") == 0) + c->server_config.use_iff_running = is_yes(v); + else if (g_strcasecmp(*k, "enable-dbus") == 0) + c->enable_dbus = is_yes(v); + else if (g_strcasecmp(*k, "drop-root") == 0) + c->drop_root = is_yes(v); + else { + fprintf(stderr, "Invalid configuration key \"%s\" in group \"%s\"\n", *k, *g); + goto finish; + } + + g_free(v); + v = NULL; + } + + g_strfreev(keys); + keys = NULL; + + } else if (g_strcasecmp(*g, "publish") == 0) { + gchar **k; + + keys = g_key_file_get_keys(f, *g, NULL, NULL); + + for (k = keys; *k; k++) { + + v = g_key_file_get_string(f, *g, *k, NULL); + + if (g_strcasecmp(*k, "publish-addresses") == 0) + c->server_config.publish_addresses = is_yes(v); + else if (g_strcasecmp(*k, "publish-hinfo") == 0) + c->server_config.publish_hinfo = is_yes(v); + else if (g_strcasecmp(*k, "publish-workstation") == 0) + c->server_config.publish_workstation = is_yes(v); + else if (g_strcasecmp(*k, "publish-domain") == 0) + c->server_config.publish_domain = is_yes(v); + else if (g_strcasecmp(*k, "publish-resolv-conf-dns-servers") == 0) + c->publish_resolv_conf = is_yes(v); + else if (g_strcasecmp(*k, "publish-dns-servers") == 0) { + g_strfreev(c->publish_dns_servers); + c->publish_dns_servers = g_key_file_get_string_list(f, *g, *k, NULL, NULL); + } else { + fprintf(stderr, "Invalid configuration key \"%s\" in group \"%s\"\n", *k, *g); + goto finish; + } + + g_free(v); + v = NULL; + } + + g_strfreev(keys); + keys = NULL; + + } else if (g_strcasecmp(*g, "reflector") == 0) { + gchar **k; + + keys = g_key_file_get_keys(f, *g, NULL, NULL); + + for (k = keys; *k; k++) { + + v = g_key_file_get_string(f, *g, *k, NULL); + + if (g_strcasecmp(*k, "enable-reflector") == 0) + c->server_config.enable_reflector = is_yes(v); + else if (g_strcasecmp(*k, "reflect-ipv") == 0) + c->server_config.reflect_ipv = is_yes(v); + else { + fprintf(stderr, "Invalid configuration key \"%s\" in group \"%s\"\n", *k, *g); + goto finish; + } + + g_free(v); + v = NULL; + } + + g_strfreev(keys); + keys = NULL; + + } else { + fprintf(stderr, "Invalid configuration file group \"%s\".\n", *g); + goto finish; + } } - dbus_connection_setup_with_g_main (bus, NULL); - dbus_connection_set_exit_on_disconnect (bus, FALSE); + r = 0; + +finish: + + g_strfreev(groups); + g_strfreev(keys); + g_free(v); + + if (err) + g_error_free (err); + + if (f) + g_key_file_free(f); + + return r; +} + +static void log_function(AvahiLogLevel level, const gchar *txt) { + + static const int const log_level_map[] = { + LOG_ERR, + LOG_WARNING, + LOG_NOTICE, + LOG_INFO, + LOG_DEBUG + }; + + g_assert(level < AVAHI_LOG_LEVEL_MAX); + g_assert(txt); + + daemon_log(log_level_map[level], "%s", txt); +} + +static void dump(const gchar *text, gpointer userdata) { + avahi_log_info("%s", text); +} - dbus_bus_acquire_service (bus, DBUS_SERVICE_AVAHI, 0, &error); +static gboolean signal_callback(GIOChannel *source, GIOCondition condition, gpointer data) { + gint sig; + GMainLoop *loop = data; + + g_assert(source); + g_assert(loop); - if (dbus_error_is_set (&error)) - { - g_warning ("dbus_error_is_set (): %s", error.message); - dbus_error_free (&error); + if ((sig = daemon_signal_next()) <= 0) { + avahi_log_error("daemon_signal_next() failed"); + return FALSE; + } - return -1; + switch (sig) { + case SIGINT: + case SIGQUIT: + case SIGTERM: + avahi_log_info( + "Got %s, quitting.", + sig == SIGINT ? "SIGINT" : + (sig == SIGQUIT ? "SIGQUIT" : "SIGTERM")); + g_main_loop_quit(loop); + break; + + case SIGHUP: + avahi_log_info("Got SIGHUP, reloading."); + static_service_load(); + static_service_add_to_server(); + + if (resolv_conf_entry_group) + avahi_entry_group_reset(resolv_conf_entry_group); + + load_resolv_conf(&config); + + if (resolv_conf && resolv_conf[0]) + resolv_conf_entry_group = add_dns_servers(avahi_server, resolv_conf_entry_group, resolv_conf); + + break; + + case SIGUSR1: + avahi_log_info("Got SIGUSR1, dumping record data."); + avahi_server_dump(avahi_server, dump, NULL); + break; + + default: + avahi_log_warn("Got spurious signal, ignoring."); + break; } - dbus_connection_add_filter (bus, signal_filter, loop, NULL); - dbus_bus_add_match (bus, - "type='method_call',interface='org.freedesktop.Avahi'", - &error); + return TRUE; +} + +static gint run_server(DaemonConfig *c) { + GMainLoop *loop = NULL; + gint r = -1; + GIOChannel *io = NULL; + guint watch_id = (guint) -1; + gint error; + + g_assert(c); + + loop = g_main_loop_new(NULL, FALSE); + + if (daemon_signal_init(SIGINT, SIGQUIT, SIGHUP, SIGTERM, SIGUSR1, 0) < 0) { + avahi_log_error("Could not register signal handlers (%s).", strerror(errno)); + goto finish; + } - if (dbus_error_is_set (&error)) - { - g_warning ("dbus_bus_add_match (): %s", error.message); - dbus_error_free (&error); + if (!(io = g_io_channel_unix_new(daemon_signal_fd()))) { + avahi_log_error( "Failed to create signal io channel."); + goto finish; + } - return -1; + g_io_channel_set_close_on_unref(io, FALSE); + g_io_add_watch(io, G_IO_IN, signal_callback, loop); + + if (simple_protocol_setup(NULL) < 0) + goto finish; + +#ifdef ENABLE_DBUS + if (c->enable_dbus) + if (dbus_protocol_setup(loop) < 0) + goto finish; +#endif + + if (!(avahi_server = avahi_server_new(NULL, &c->server_config, server_callback, c, &error))) { + avahi_log_error("Failed to create server: %s", avahi_strerror(error)); + goto finish; } + load_resolv_conf(c); + + static_service_load(); + + if (c->daemonize) + daemon_retval_send(0); + + r = 0; + g_main_loop_run(loop); - g_main_loop_unref(loop); + +finish: + + static_service_remove_from_server(); + static_service_free_all(); + remove_dns_server_entry_groups(); + + simple_protocol_shutdown(); + +#ifdef ENABLE_DBUS + if (c->enable_dbus) + dbus_protocol_shutdown(); +#endif + + if (avahi_server) + avahi_server_free(avahi_server); + + daemon_signal_done(); + + if (watch_id != (guint) -1) + g_source_remove(watch_id); + + if (io) + g_io_channel_unref(io); + + + if (loop) + g_main_loop_unref(loop); + + if (r != 0 && c->daemonize) + daemon_retval_send(1); + + return r; +} + +static gint drop_root(void) { + struct passwd *pw; + struct group * gr; + gint r; + + if (!(pw = getpwnam(AVAHI_USER))) { + avahi_log_error( "Failed to find user '"AVAHI_USER"'."); + return -1; + } + + if (!(gr = getgrnam(AVAHI_GROUP))) { + avahi_log_error( "Failed to find group '"AVAHI_GROUP"'."); + return -1; + } + + 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); + + if (initgroups(AVAHI_USER, gr->gr_gid) != 0) { + avahi_log_error("Failed to change group list: %s", strerror(errno)); + return -1; + } + +#if defined(HAVE_SETRESGID) + r = setresgid(gr->gr_gid, gr->gr_gid, gr->gr_gid); +#elif defined(HAVE_SETREGID) + r = setregid(gr->gr_gid, gr->gr_gid); +#else + if ((r = setgid(gr->gr_gid)) >= 0) + r = setegid(gr->gr_gid); +#endif + + if (r < 0) { + avahi_log_error("Failed to change GID: %s", strerror(errno)); + return -1; + } + +#if defined(HAVE_SETRESUID) + r = setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid); +#elif defined(HAVE_SETREUID) + r = setreuid(pw->pw_uid, pw->pw_uid); +#else + if ((r = setuid(pw->pw_uid)) >= 0) + r = seteuid(pw->pw_uid); +#endif + + if (r < 0) { + avahi_log_error("Failed to change UID: %s", strerror(errno)); + return -1; + } + + g_setenv("USER", pw->pw_name, 1); + g_setenv("LOGNAME", pw->pw_name, 1); + g_setenv("HOME", pw->pw_dir, 1); + avahi_log_info("Successfully dropped root privileges."); + return 0; } + +static const char* pid_file_proc(void) { + return AVAHI_DAEMON_RUNTIME_DIR"/pid"; +} + +static gint make_runtime_dir(void) { + gint r = -1; + mode_t u; + gboolean reset_umask = FALSE; + struct passwd *pw; + struct group * gr; + struct stat st; + + if (!(pw = getpwnam(AVAHI_USER))) { + avahi_log_error( "Failed to find user '"AVAHI_USER"'."); + goto fail; + } + + if (!(gr = getgrnam(AVAHI_GROUP))) { + avahi_log_error( "Failed to find group '"AVAHI_GROUP"'."); + goto fail; + } + + u = umask(0000); + reset_umask = TRUE; + + if (mkdir(AVAHI_DAEMON_RUNTIME_DIR, 0755) < 0 && errno != EEXIST) { + avahi_log_error("mkdir(\""AVAHI_DAEMON_RUNTIME_DIR"\"): %s", strerror(errno)); + goto fail; + } + + chown(AVAHI_DAEMON_RUNTIME_DIR, pw->pw_uid, gr->gr_gid); + + if (stat(AVAHI_DAEMON_RUNTIME_DIR, &st) < 0) { + avahi_log_error("stat(): %s\n", strerror(errno)); + goto fail; + } + + if (!S_ISDIR(st.st_mode) || st.st_uid != pw->pw_uid || st.st_gid != gr->gr_gid) { + avahi_log_error("Failed to create runtime directory "AVAHI_DAEMON_RUNTIME_DIR"."); + goto fail; + } + + r = 0; + +fail: + if (reset_umask) + umask(u); + return r; + +} + +int main(int argc, char *argv[]) { + gint r = 255; + const gchar *argv0; + gboolean wrote_pid_file = FALSE; + + avahi_set_log_function(log_function); + + avahi_server_config_init(&config.server_config); + config.command = DAEMON_RUN; + config.daemonize = FALSE; + config.config_file = NULL; + config.enable_dbus = TRUE; + config.drop_root = TRUE; + config.publish_dns_servers = NULL; + config.publish_resolv_conf = FALSE; + + if ((argv0 = strrchr(argv[0], '/'))) + argv0++; + else + argv0 = argv[0]; + + daemon_pid_file_ident = (const char *) argv0; + daemon_log_ident = (char*) argv0; + daemon_pid_file_proc = pid_file_proc; + + if (parse_command_line(&config, argc, argv) < 0) + goto finish; + + if (config.command == DAEMON_HELP) { + help(stdout, argv0); + r = 0; + } else if (config.command == DAEMON_VERSION) { + printf("%s "PACKAGE_VERSION"\n", argv0); + r = 0; + } else if (config.command == DAEMON_KILL) { + if (daemon_pid_file_kill_wait(SIGTERM, 5) < 0) { + avahi_log_warn("Failed to kill daemon: %s", strerror(errno)); + goto finish; + } + + r = 0; + + } else if (config.command == DAEMON_RELOAD) { + if (daemon_pid_file_kill(SIGHUP) < 0) { + avahi_log_warn("Failed to kill daemon: %s", strerror(errno)); + goto finish; + } + + r = 0; + + } else if (config.command == DAEMON_CHECK) + r = (daemon_pid_file_is_running() >= 0) ? 0 : 1; + else if (config.command == DAEMON_RUN) { + pid_t pid; + + if (getuid() != 0) { + avahi_log_error("This program is intended to be run as root."); + goto finish; + } + + if ((pid = daemon_pid_file_is_running()) >= 0) { + avahi_log_error("Daemon already running on PID %u", pid); + goto finish; + } + + if (load_config_file(&config) < 0) + goto finish; + + if (config.daemonize) { + daemon_retval_init(); + + if ((pid = daemon_fork()) < 0) + goto finish; + else if (pid != 0) { + int ret; + /** Parent **/ + + if ((ret = daemon_retval_wait(20)) < 0) { + avahi_log_error("Could not recieve return value from daemon process."); + goto finish; + } + + r = ret; + goto finish; + } + + /* Child */ + } + + + printf("%s "PACKAGE_VERSION" starting up.\n", argv0); + + chdir("/"); + + if (make_runtime_dir() < 0) + goto finish; + + if (config.drop_root) { + if (drop_root() < 0) + goto finish; + } + + if (daemon_pid_file_create() < 0) { + avahi_log_error("Failed to create PID file: %s", strerror(errno)); + + if (config.daemonize) + daemon_retval_send(1); + goto finish; + } else + wrote_pid_file = TRUE; + + if (run_server(&config) == 0) + r = 0; + } + +finish: + + if (config.daemonize) + daemon_retval_done(); + + avahi_server_config_free(&config.server_config); + g_free(config.config_file); + g_strfreev(config.publish_dns_servers); + g_strfreev(resolv_conf); + + if (wrote_pid_file) + daemon_pid_file_remove(); + + return r; +}