#include <config.h>
#endif
-#include <avahi-core/core.h>
+#include <getopt.h>
+#include <string.h>
+#include <signal.h>
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+#include <grp.h>
+#include <pwd.h>
+#include <sys/stat.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <time.h>
+#include <stdlib.h>
+
+#include <libdaemon/dfork.h>
+#include <libdaemon/dsignal.h>
+#include <libdaemon/dlog.h>
+#include <libdaemon/dpid.h>
-#define DBUS_API_SUBJECT_TO_CHANGE
-#include <dbus/dbus.h>
-#include <dbus/dbus-glib-lowlevel.h>
+#include <avahi-core/core.h>
+#include <avahi-core/log.h>
+#include <avahi-glib/glib-malloc.h>
+#include <avahi-glib/glib-watch.h>
+#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_SERVICE_AVAHI "org.freedesktop.Avahi"
+ if (!c->publish_resolv_conf)
+ return 0;
+
+ 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 ");
- return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
+ if (g_str_has_prefix(p, "nameserver")) {
+ p += 10;
+ p += strspn(p, "\t ");
+ p[strcspn(p, "\t ")] = 0;
+ resolv_conf[i++] = strdup(p);
+ }
}
- g_message ("Register received from: %s", s);
+ ret = 0;
+
+finish:
+
+ if (ret != 0) {
+ g_strfreev(resolv_conf);
+ resolv_conf = NULL;
+ }
+
+ if (f)
+ fclose(f);
- return DBUS_HANDLER_RESULT_HANDLED;
+ 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;
+
+ g_assert(s);
+ g_assert(l);
- dbus_error_init (&error);
+ if (!g)
+ g = avahi_entry_group_new(s, NULL, NULL);
- g_message ("dbus: interface=%s, path=%s, member=%s",
- dbus_message_get_interface (message),
- dbus_message_get_path (message),
- dbus_message_get_member (message));
+ g_assert(avahi_entry_group_is_empty(g));
- 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");
+ 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;
+ }
+ }
- 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;
+ avahi_entry_group_commit(g);
- dbus_message_get_args (message, &error,
- DBUS_TYPE_STRING, &name,
- DBUS_TYPE_INVALID);
+ return g;
+}
- if (dbus_error_is_set (&error))
- {
- g_warning ("Error parsing NameAcquired message");
- dbus_error_free (&error);
+static void remove_dns_server_entry_groups(void) {
- return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
- }
+ 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, void *userdata) {
+ DaemonConfig *c = userdata;
+
+ g_assert(s);
+ g_assert(c);
- g_message ("dbus: ServiceAcquired (%s)", name);
+#ifdef ENABLE_DBUS
+ if (c->enable_dbus)
+ dbus_protocol_server_state_changed(state);
+#endif
- return DBUS_HANDLER_RESULT_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();
+
+ remove_dns_server_entry_groups();
+
+ if (resolv_conf && resolv_conf[0])
+ resolv_conf_entry_group = add_dns_servers(s, resolv_conf_entry_group, resolv_conf);
+
+ 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);
- g_message ("dbus: missed event");
+ simple_protocol_restart_queries();
+
+ } else if (state == AVAHI_SERVER_COLLISION) {
+ gchar *n;
- return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
+ 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 = NULL;
- DBusError error;
- gint r = -1;
- 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;
+ }
+ }
- bus = dbus_bus_get (DBUS_BUS_SYSTEM, &error);
+ if (optind < argc) {
+ fprintf(stderr, "Too many arguments\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+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;
+ 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;
}
- dbus_connection_setup_with_g_main (bus, NULL);
- dbus_connection_set_exit_on_disconnect (bus, FALSE);
+ groups = g_key_file_get_groups(f, NULL);
- dbus_bus_acquire_service (bus, DBUS_SERVICE_AVAHI, 0, &error);
+ for (g = groups; *g; g++) {
+ if (g_strcasecmp(*g, "server") == 0) {
+ gchar **k;
+
+ keys = g_key_file_get_keys(f, *g, NULL, NULL);
- if (dbus_error_is_set (&error))
- {
- g_warning ("dbus_error_is_set (): %s", error.message);
- dbus_error_free (&error);
+ for (k = keys; *k; k++) {
- goto finish;
+ 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_add_filter (bus, signal_filter, loop, NULL);
- dbus_bus_add_match (bus,
- "type='method_call',interface='org.freedesktop.Avahi'",
- &error);
+ 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) {
- if (dbus_error_is_set (&error))
- {
- g_warning ("dbus_bus_add_match (): %s", error.message);
- dbus_error_free (&error);
+ 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);
+}
+
+static gboolean signal_callback(GIOChannel *source, GIOCondition condition, gpointer data) {
+ gint sig;
+ GMainLoop *loop = data;
+
+ g_assert(source);
+ g_assert(loop);
+
+ if ((sig = daemon_signal_next()) <= 0) {
+ avahi_log_error("daemon_signal_next() failed");
+ return FALSE;
+ }
+ 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;
+ }
+
+ return TRUE;
+}
+
+static gint run_server(DaemonConfig *c) {
+ GMainLoop *loop = NULL;
+ gint r = -1;
+ GIOChannel *io = NULL;
+ guint watch_id = (guint) -1;
+ gint error;
+ AvahiGLibPoll *poll_api;
+
+ g_assert(c);
+
+ poll_api = avahi_glib_poll_new(NULL);
+ 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 (!(io = g_io_channel_unix_new(daemon_signal_fd()))) {
+ avahi_log_error( "Failed to create signal io channel.");
goto finish;
}
+ g_io_channel_set_close_on_unref(io, FALSE);
+ watch_id = 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(avahi_glib_poll_get(poll_api), &c->server_config, server_callback, c, &error))) {
+ avahi_log_error("Failed to create server: %s", avahi_strerror(error));
+ goto finish;
+ }
- g_main_loop_run(loop);
+ load_resolv_conf(c);
+
+ static_service_load();
+
+ if (c->daemonize)
+ daemon_retval_send(0);
r = 0;
-
-finish:
+ g_main_loop_run(loop);
+
+finish:
+
+ static_service_remove_from_server();
+ static_service_free_all();
+ remove_dns_server_entry_groups();
+
simple_protocol_shutdown();
- if (bus) {
- dbus_connection_disconnect(bus);
- dbus_connection_unref(bus);
- }
+#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 (poll_api)
+ avahi_glib_poll_free(poll_api);
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;
+
+}
+
+#define RANDOM_DEVICE "/dev/urandom"
+
+static void init_rand_seed(void) {
+ int fd;
+ unsigned seed = 0;
+
+ /* Try to initialize seed from /dev/urandom, to make it a little
+ * less predictable, and to make sure that multiple machines
+ * booted at the same time choose different random seeds. */
+ if ((fd = open(RANDOM_DEVICE, O_RDONLY)) >= 0) {
+ read(fd, &seed, sizeof(seed));
+ close(fd);
+ }
+
+ /* If the initialization failed by some reason, we add the time to the seed*/
+ seed |= (unsigned) time(NULL);
+
+ srand(seed);
+}
+
+int main(int argc, char *argv[]) {
+ gint r = 255;
+ const gchar *argv0;
+ gboolean wrote_pid_file = FALSE;
+
+ avahi_set_log_function(log_function);
+ avahi_set_allocator(avahi_glib_allocator());
+
+ init_rand_seed();
+
+ 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;
}
projects / catta / blobdiff