-/* $Id$ */
-
/***
This file is part of avahi.
-
+
avahi is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
-
+
avahi is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
Public License for more details.
-
+
You should have received a copy of the GNU Lesser General Public
License along with avahi; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
#include <config.h>
#endif
+#include <assert.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 <sys/ioctl.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <time.h>
+#include <stdlib.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <sys/socket.h>
+
+#ifdef HAVE_INOTIFY
+#include <sys/inotify.h>
+#endif
+
+#ifdef HAVE_KQUEUE
+#include <sys/types.h>
+#include <sys/event.h>
+#include <unistd.h>
+#endif
+
+#include <libdaemon/dfork.h>
+#include <libdaemon/dsignal.h>
+#include <libdaemon/dlog.h>
+#include <libdaemon/dpid.h>
+
+#include <avahi-common/malloc.h>
+#include <avahi-common/simple-watch.h>
+#include <avahi-common/error.h>
+#include <avahi-common/alternative.h>
+#include <avahi-common/domain.h>
+
#include <avahi-core/core.h>
+#include <avahi-core/publish.h>
+#include <avahi-core/dns-srv-rr.h>
+#include <avahi-core/log.h>
+#ifdef ENABLE_CHROOT
+#include "chroot.h"
+#include "caps.h"
+#endif
+
+#include "setproctitle.h"
#include "main.h"
#include "simple-protocol.h"
#include "static-services.h"
+#include "static-hosts.h"
+#include "ini-file-parser.h"
+#include "sd-daemon.h"
-#define DBUS_SERVICE_AVAHI "org.freedesktop.Avahi"
+#ifdef HAVE_DBUS
+#include "dbus-protocol.h"
+#endif
AvahiServer *avahi_server = NULL;
+AvahiSimplePoll *simple_poll_api = NULL;
+static char *argv0 = NULL;
+int nss_support = 0;
-static void server_callback(AvahiServer *s, AvahiServerState state, gpointer userdata) {
- g_assert(s);
+typedef enum {
+ DAEMON_RUN,
+ DAEMON_KILL,
+ DAEMON_VERSION,
+ DAEMON_HELP,
+ DAEMON_RELOAD,
+ DAEMON_CHECK
+} DaemonCommand;
- if (state == AVAHI_SERVER_RUNNING) {
- g_message("Server startup complete. Host name is <%s>", avahi_server_get_host_name_fqdn(s));
- static_service_add_to_server();
- } else if (state == AVAHI_SERVER_COLLISION) {
- gchar *n;
+typedef struct {
+ AvahiServerConfig server_config;
+ DaemonCommand command;
+ int daemonize;
+ int use_syslog;
+ char *config_file;
+#ifdef HAVE_DBUS
+ int enable_dbus;
+ int fail_on_missing_dbus;
+#endif
+ int drop_root;
+ int set_rlimits;
+#ifdef ENABLE_CHROOT
+ int use_chroot;
+#endif
+ int modify_proc_title;
+
+ int disable_user_service_publishing;
+ int publish_resolv_conf;
+ char ** publish_dns_servers;
+ int debug;
+
+ int rlimit_as_set, rlimit_core_set, rlimit_data_set, rlimit_fsize_set, rlimit_nofile_set, rlimit_stack_set;
+ rlim_t rlimit_as, rlimit_core, rlimit_data, rlimit_fsize, rlimit_nofile, rlimit_stack;
+
+#ifdef RLIMIT_NPROC
+ int rlimit_nproc_set;
+ rlim_t rlimit_nproc;
+#endif
+} DaemonConfig;
+
+#define RESOLV_CONF "/etc/resolv.conf"
+#define BROWSE_DOMAINS_MAX 16
+
+static AvahiSEntryGroup *dns_servers_entry_group = NULL;
+static AvahiSEntryGroup *resolv_conf_entry_group = NULL;
+
+static char **resolv_conf_name_servers = NULL;
+static char **resolv_conf_search_domains = NULL;
+
+static DaemonConfig config;
+
+static int has_prefix(const char *s, const char *prefix) {
+ size_t l;
+
+ l = strlen(prefix);
+
+ return strlen(s) >= l && strncmp(s, prefix, l) == 0;
+}
- static_service_remove_from_server();
-
- n = avahi_alternative_host_name(avahi_server_get_host_name(s));
- g_message("Host name conflict, retrying with <%s>", n);
- avahi_server_set_host_name(s, n);
- g_free(n);
+static int load_resolv_conf(void) {
+ int ret = -1;
+ FILE *f;
+ int i = 0, j = 0;
+
+ avahi_strfreev(resolv_conf_name_servers);
+ resolv_conf_name_servers = NULL;
+
+ avahi_strfreev(resolv_conf_search_domains);
+ resolv_conf_search_domains = NULL;
+
+#ifdef ENABLE_CHROOT
+ f = avahi_chroot_helper_get_file(RESOLV_CONF);
+#else
+ f = fopen(RESOLV_CONF, "r");
+#endif
+
+ if (!f) {
+ avahi_log_warn("Failed to open "RESOLV_CONF": %s", strerror(errno));
+ goto finish;
}
+
+ resolv_conf_name_servers = avahi_new0(char*, AVAHI_WIDE_AREA_SERVERS_MAX+1);
+ resolv_conf_search_domains = avahi_new0(char*, BROWSE_DOMAINS_MAX+1);
+
+ while (!feof(f)) {
+ char ln[128];
+ char *p;
+
+ if (!(fgets(ln, sizeof(ln), f)))
+ break;
+
+ ln[strcspn(ln, "\r\n#")] = 0;
+ p = ln + strspn(ln, "\t ");
+
+ if ((has_prefix(p, "nameserver ") || has_prefix(p, "nameserver\t")) && i < AVAHI_WIDE_AREA_SERVERS_MAX) {
+ p += 10;
+ p += strspn(p, "\t ");
+ p[strcspn(p, "\t ")] = 0;
+ resolv_conf_name_servers[i++] = avahi_strdup(p);
+ }
+
+ if ((has_prefix(p, "search ") || has_prefix(p, "search\t") ||
+ has_prefix(p, "domain ") || has_prefix(p, "domain\t"))) {
+
+ p += 6;
+
+ while (j < BROWSE_DOMAINS_MAX) {
+ size_t k;
+
+ p += strspn(p, "\t ");
+ k = strcspn(p, "\t ");
+
+ if (k > 0) {
+ resolv_conf_search_domains[j++] = avahi_strndup(p, k);
+ p += k;
+ }
+
+ if (!*p)
+ break;
+ }
+ }
+ }
+
+ ret = 0;
+
+finish:
+
+ if (ret != 0) {
+ avahi_strfreev(resolv_conf_name_servers);
+ resolv_conf_name_servers = NULL;
+
+ avahi_strfreev(resolv_conf_search_domains);
+ resolv_conf_search_domains = NULL;
+ }
+
+ if (f)
+ fclose(f);
+
+ return ret;
}
-int main(int argc, char *argv[]) {
- GMainLoop *loop = NULL;
- gint r = 255;
- AvahiServerConfig config;
+static AvahiSEntryGroup* add_dns_servers(AvahiServer *s, AvahiSEntryGroup* g, char **l) {
+ char **p;
+
+ assert(s);
+ assert(l);
+
+ if (!g)
+ g = avahi_s_entry_group_new(s, NULL, NULL);
+
+ assert(avahi_s_entry_group_is_empty(g));
+
+ for (p = l; *p; p++) {
+ AvahiAddress a;
+
+ if (!avahi_address_parse(*p, AVAHI_PROTO_UNSPEC, &a))
+ avahi_log_warn("Failed to parse address '%s', ignoring.", *p);
+ else
+ if (avahi_server_add_dns_server_address(s, g, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, 0, NULL, AVAHI_DNS_SERVER_RESOLVE, &a, 53) < 0) {
+ avahi_s_entry_group_free(g);
+ avahi_log_error("Failed to add DNS server address: %s", avahi_strerror(avahi_server_errno(s)));
+ return NULL;
+ }
+ }
+
+ avahi_s_entry_group_commit(g);
+
+ return g;
+}
+
+static void remove_dns_server_entry_groups(void) {
+
+ if (resolv_conf_entry_group)
+ avahi_s_entry_group_reset(resolv_conf_entry_group);
+
+ if (dns_servers_entry_group)
+ avahi_s_entry_group_reset(dns_servers_entry_group);
+}
+
+static void update_wide_area_servers(void) {
+ AvahiAddress a[AVAHI_WIDE_AREA_SERVERS_MAX];
+ unsigned n = 0;
+ char **p;
+
+ if (!resolv_conf_name_servers) {
+ avahi_server_set_wide_area_servers(avahi_server, NULL, 0);
+ return;
+ }
+
+ for (p = resolv_conf_name_servers; *p && n < AVAHI_WIDE_AREA_SERVERS_MAX; p++) {
+ if (!avahi_address_parse(*p, AVAHI_PROTO_UNSPEC, &a[n]))
+ avahi_log_warn("Failed to parse address '%s', ignoring.", *p);
+ else
+ n++;
+ }
+
+ avahi_server_set_wide_area_servers(avahi_server, a, n);
+}
+
+static AvahiStringList *filter_duplicate_domains(AvahiStringList *l) {
+ AvahiStringList *e, *n, *p;
+
+ if (!l)
+ return l;
+
+ for (p = l, e = l->next; e; e = n) {
+ n = e->next;
+
+ if (avahi_domain_equal((char*) e->text, (char*) l->text)) {
+ p->next = e->next;
+ avahi_free(e);
+ } else
+ p = e;
+ }
+
+ l->next = filter_duplicate_domains(l->next);
+ return l;
+}
+
+static void update_browse_domains(void) {
+ AvahiStringList *l;
+ int n;
+ char **p;
+
+ if (!resolv_conf_search_domains) {
+ avahi_server_set_browse_domains(avahi_server, NULL);
+ return;
+ }
+
+ l = avahi_string_list_copy(config.server_config.browse_domains);
+
+ for (p = resolv_conf_search_domains, n = 0; *p && n < BROWSE_DOMAINS_MAX; p++, n++) {
+ if (!avahi_is_valid_domain_name(*p))
+ avahi_log_warn("'%s' is no valid domain name, ignoring.", *p);
+ else
+ l = avahi_string_list_add(l, *p);
+ }
+
+ l = filter_duplicate_domains(l);
+
+ avahi_server_set_browse_domains(avahi_server, l);
+}
+
+static void server_callback(AvahiServer *s, AvahiServerState state, void *userdata) {
+ DaemonConfig *c = userdata;
+
+ assert(s);
+ assert(c);
+
+ /* This function is possibly called before the global variable
+ * avahi_server has been set, therefore we do it explicitly */
+
+ avahi_server = s;
+
+#ifdef HAVE_DBUS
+ if (c->enable_dbus && state != AVAHI_SERVER_INVALID && state != AVAHI_SERVER_FAILURE)
+ dbus_protocol_server_state_changed(state);
+#endif
+
+ switch (state) {
+ case AVAHI_SERVER_RUNNING:
+ 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));
+
+ avahi_set_proc_title(argv0, "%s: running [%s]", argv0, avahi_server_get_host_name_fqdn(s));
+
+ static_service_add_to_server();
+ static_hosts_add_to_server();
+
+ remove_dns_server_entry_groups();
+
+ if (c->publish_resolv_conf && resolv_conf_name_servers && resolv_conf_name_servers[0])
+ resolv_conf_entry_group = add_dns_servers(s, resolv_conf_entry_group, resolv_conf_name_servers);
+
+ 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);
+
+ simple_protocol_restart_queries();
+ break;
+
+ case AVAHI_SERVER_COLLISION: {
+ char *n;
+
+ avahi_set_proc_title(argv0, "%s: collision", argv0);
+
+ static_service_remove_from_server();
+ static_hosts_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);
+ avahi_free(n);
+
+ break;
+ }
+
+ case AVAHI_SERVER_FAILURE:
+
+ avahi_log_error("Server error: %s", avahi_strerror(avahi_server_errno(s)));
+ avahi_simple_poll_quit(simple_poll_api);
+ break;
+
+ case AVAHI_SERVER_REGISTERING:
+
+ avahi_set_proc_title(argv0, "%s: registering [%s]", argv0, avahi_server_get_host_name_fqdn(s));
+
+ static_service_remove_from_server();
+ static_hosts_remove_from_server();
+ remove_dns_server_entry_groups();
+
+ break;
+
+ case AVAHI_SERVER_INVALID:
+ break;
+
+ }
+}
+
+static void help(FILE *f) {
+ fprintf(f,
+ "%s [options]\n"
+ " -h --help Show this help\n"
+ " -D --daemonize Daemonize after startup (implies -s)\n"
+ " -s --syslog Write log messages to syslog(3) instead of STDERR\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"
+ " --no-rlimits Don't enforce resource limits\n"
+ " --no-drop-root Don't drop privileges\n"
+#ifdef ENABLE_CHROOT
+ " --no-chroot Don't chroot()\n"
+#endif
+ " --no-proc-title Don't modify process title\n"
+ " --debug Increase verbosity\n",
+ argv0);
+}
+
+
+static int parse_command_line(DaemonConfig *c, int argc, char *argv[]) {
+ int o;
+
+ enum {
+ OPTION_NO_RLIMITS = 256,
+ OPTION_NO_DROP_ROOT,
+#ifdef ENABLE_CHROOT
+ OPTION_NO_CHROOT,
+#endif
+ OPTION_NO_PROC_TITLE,
+ OPTION_DEBUG
+ };
+
+ static const struct option 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' },
+ { "syslog", no_argument, NULL, 's' },
+ { "no-rlimits", no_argument, NULL, OPTION_NO_RLIMITS },
+ { "no-drop-root", no_argument, NULL, OPTION_NO_DROP_ROOT },
+#ifdef ENABLE_CHROOT
+ { "no-chroot", no_argument, NULL, OPTION_NO_CHROOT },
+#endif
+ { "no-proc-title", no_argument, NULL, OPTION_NO_PROC_TITLE },
+ { "debug", no_argument, NULL, OPTION_DEBUG },
+ { NULL, 0, NULL, 0 }
+ };
+
+ assert(c);
+
+ while ((o = getopt_long(argc, argv, "hDkVf:rcs", long_options, NULL)) >= 0) {
+
+ switch(o) {
+ case 's':
+ c->use_syslog = 1;
+ break;
+ case 'h':
+ c->command = DAEMON_HELP;
+ break;
+ case 'D':
+ c->daemonize = 1;
+ break;
+ case 'k':
+ c->command = DAEMON_KILL;
+ break;
+ case 'V':
+ c->command = DAEMON_VERSION;
+ break;
+ case 'f':
+ avahi_free(c->config_file);
+ c->config_file = avahi_strdup(optarg);
+ break;
+ case 'r':
+ c->command = DAEMON_RELOAD;
+ break;
+ case 'c':
+ c->command = DAEMON_CHECK;
+ break;
+ case OPTION_NO_RLIMITS:
+ c->set_rlimits = 0;
+ break;
+ case OPTION_NO_DROP_ROOT:
+ c->drop_root = 0;
+ break;
+#ifdef ENABLE_CHROOT
+ case OPTION_NO_CHROOT:
+ c->use_chroot = 0;
+ break;
+#endif
+ case OPTION_NO_PROC_TITLE:
+ c->modify_proc_title = 0;
+ break;
+ case OPTION_DEBUG:
+ c->debug = 1;
+ break;
+ default:
+ return -1;
+ }
+ }
+
+ if (optind < argc) {
+ fprintf(stderr, "Too many arguments\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+static int is_yes(const char *s) {
+ assert(s);
+
+ return *s == 'y' || *s == 'Y' || *s == '1' || *s == 't' || *s == 'T';
+}
+
+static int load_config_file(DaemonConfig *c) {
+ int r = -1;
+ AvahiIniFile *f;
+ AvahiIniFileGroup *g;
+
+ assert(c);
+
+ if (!(f = avahi_ini_file_load(c->config_file ? c->config_file : AVAHI_CONFIG_FILE)))
+ goto finish;
+
+ for (g = f->groups; g; g = g->groups_next) {
+
+ if (strcasecmp(g->name, "server") == 0) {
+ AvahiIniFilePair *p;
+
+ for (p = g->pairs; p; p = p->pairs_next) {
+
+ if (strcasecmp(p->key, "host-name") == 0) {
+ avahi_free(c->server_config.host_name);
+ c->server_config.host_name = avahi_strdup(p->value);
+ } else if (strcasecmp(p->key, "domain-name") == 0) {
+ avahi_free(c->server_config.domain_name);
+ c->server_config.domain_name = avahi_strdup(p->value);
+ } else if (strcasecmp(p->key, "browse-domains") == 0) {
+ char **e, **t;
+
+ e = avahi_split_csv(p->value);
+
+ for (t = e; *t; t++) {
+ char cleaned[AVAHI_DOMAIN_NAME_MAX];
+
+ if (!avahi_normalize_name(*t, cleaned, sizeof(cleaned))) {
+ avahi_log_error("Invalid domain name \"%s\" for key \"%s\" in group \"%s\"\n", *t, p->key, g->name);
+ avahi_strfreev(e);
+ goto finish;
+ }
+
+ c->server_config.browse_domains = avahi_string_list_add(c->server_config.browse_domains, cleaned);
+ }
+
+ avahi_strfreev(e);
+
+ c->server_config.browse_domains = filter_duplicate_domains(c->server_config.browse_domains);
+ } else if (strcasecmp(p->key, "use-ipv4") == 0)
+ c->server_config.use_ipv4 = is_yes(p->value);
+ else if (strcasecmp(p->key, "use-ipv6") == 0)
+ c->server_config.use_ipv6 = is_yes(p->value);
+ else if (strcasecmp(p->key, "check-response-ttl") == 0)
+ c->server_config.check_response_ttl = is_yes(p->value);
+ else if (strcasecmp(p->key, "allow-point-to-point") == 0)
+ c->server_config.allow_point_to_point = is_yes(p->value);
+ else if (strcasecmp(p->key, "use-iff-running") == 0)
+ c->server_config.use_iff_running = is_yes(p->value);
+ else if (strcasecmp(p->key, "disallow-other-stacks") == 0)
+ c->server_config.disallow_other_stacks = is_yes(p->value);
+#ifdef HAVE_DBUS
+ else if (strcasecmp(p->key, "enable-dbus") == 0) {
+
+ if (*(p->value) == 'w' || *(p->value) == 'W') {
+ c->fail_on_missing_dbus = 0;
+ c->enable_dbus = 1;
+ } else if (*(p->value) == 'y' || *(p->value) == 'Y') {
+ c->fail_on_missing_dbus = 1;
+ c->enable_dbus = 1;
+ } else {
+ c->enable_dbus = 0;
+ }
+ }
+#endif
+ else if (strcasecmp(p->key, "allow-interfaces") == 0) {
+ char **e, **t;
+
+ avahi_string_list_free(c->server_config.allow_interfaces);
+ c->server_config.allow_interfaces = NULL;
+ e = avahi_split_csv(p->value);
+
+ for (t = e; *t; t++)
+ c->server_config.allow_interfaces = avahi_string_list_add(c->server_config.allow_interfaces, *t);
+
+ avahi_strfreev(e);
+ } else if (strcasecmp(p->key, "deny-interfaces") == 0) {
+ char **e, **t;
+
+ avahi_string_list_free(c->server_config.deny_interfaces);
+ c->server_config.deny_interfaces = NULL;
+ e = avahi_split_csv(p->value);
+
+ for (t = e; *t; t++)
+ c->server_config.deny_interfaces = avahi_string_list_add(c->server_config.deny_interfaces, *t);
+
+ avahi_strfreev(e);
+ } else {
+ avahi_log_error("Invalid configuration key \"%s\" in group \"%s\"\n", p->key, g->name);
+ goto finish;
+ }
+ }
+
+ } else if (strcasecmp(g->name, "publish") == 0) {
+ AvahiIniFilePair *p;
+
+ for (p = g->pairs; p; p = p->pairs_next) {
+
+ if (strcasecmp(p->key, "publish-addresses") == 0)
+ c->server_config.publish_addresses = is_yes(p->value);
+ else if (strcasecmp(p->key, "publish-hinfo") == 0)
+ c->server_config.publish_hinfo = is_yes(p->value);
+ else if (strcasecmp(p->key, "publish-workstation") == 0)
+ c->server_config.publish_workstation = is_yes(p->value);
+ else if (strcasecmp(p->key, "publish-domain") == 0)
+ c->server_config.publish_domain = is_yes(p->value);
+ else if (strcasecmp(p->key, "publish-resolv-conf-dns-servers") == 0)
+ c->publish_resolv_conf = is_yes(p->value);
+ else if (strcasecmp(p->key, "disable-publishing") == 0)
+ c->server_config.disable_publishing = is_yes(p->value);
+ else if (strcasecmp(p->key, "disable-user-service-publishing") == 0)
+ c->disable_user_service_publishing = is_yes(p->value);
+ else if (strcasecmp(p->key, "add-service-cookie") == 0)
+ c->server_config.add_service_cookie = is_yes(p->value);
+ else if (strcasecmp(p->key, "publish-dns-servers") == 0) {
+ avahi_strfreev(c->publish_dns_servers);
+ c->publish_dns_servers = avahi_split_csv(p->value);
+ } else if (strcasecmp(p->key, "publish-a-on-ipv6") == 0)
+ c->server_config.publish_a_on_ipv6 = is_yes(p->value);
+ else if (strcasecmp(p->key, "publish-aaaa-on-ipv4") == 0)
+ c->server_config.publish_aaaa_on_ipv4 = is_yes(p->value);
+ else {
+ avahi_log_error("Invalid configuration key \"%s\" in group \"%s\"\n", p->key, g->name);
+ goto finish;
+ }
+ }
+
+ } else if (strcasecmp(g->name, "wide-area") == 0) {
+ AvahiIniFilePair *p;
+
+ for (p = g->pairs; p; p = p->pairs_next) {
+
+ if (strcasecmp(p->key, "enable-wide-area") == 0)
+ c->server_config.enable_wide_area = is_yes(p->value);
+ else {
+ avahi_log_error("Invalid configuration key \"%s\" in group \"%s\"\n", p->key, g->name);
+ goto finish;
+ }
+ }
+
+ } else if (strcasecmp(g->name, "reflector") == 0) {
+ AvahiIniFilePair *p;
+
+ for (p = g->pairs; p; p = p->pairs_next) {
+
+ if (strcasecmp(p->key, "enable-reflector") == 0)
+ c->server_config.enable_reflector = is_yes(p->value);
+ else if (strcasecmp(p->key, "reflect-ipv") == 0)
+ c->server_config.reflect_ipv = is_yes(p->value);
+ else {
+ avahi_log_error("Invalid configuration key \"%s\" in group \"%s\"\n", p->key, g->name);
+ goto finish;
+ }
+ }
+
+ } else if (strcasecmp(g->name, "rlimits") == 0) {
+ AvahiIniFilePair *p;
+
+ for (p = g->pairs; p; p = p->pairs_next) {
+
+ if (strcasecmp(p->key, "rlimit-as") == 0) {
+ c->rlimit_as_set = 1;
+ c->rlimit_as = atoi(p->value);
+ } else if (strcasecmp(p->key, "rlimit-core") == 0) {
+ c->rlimit_core_set = 1;
+ c->rlimit_core = atoi(p->value);
+ } else if (strcasecmp(p->key, "rlimit-data") == 0) {
+ c->rlimit_data_set = 1;
+ c->rlimit_data = atoi(p->value);
+ } else if (strcasecmp(p->key, "rlimit-fsize") == 0) {
+ c->rlimit_fsize_set = 1;
+ c->rlimit_fsize = atoi(p->value);
+ } else if (strcasecmp(p->key, "rlimit-nofile") == 0) {
+ c->rlimit_nofile_set = 1;
+ c->rlimit_nofile = atoi(p->value);
+ } else if (strcasecmp(p->key, "rlimit-stack") == 0) {
+ c->rlimit_stack_set = 1;
+ c->rlimit_stack = atoi(p->value);
+ } else if (strcasecmp(p->key, "rlimit-nproc") == 0) {
+#ifdef RLIMIT_NPROC
+ c->rlimit_nproc_set = 1;
+ c->rlimit_nproc = atoi(p->value);
+#else
+ avahi_log_error("Ignoring configuration key \"%s\" in group \"%s\"\n", p->key, g->name);
+#endif
+ } else {
+ avahi_log_error("Invalid configuration key \"%s\" in group \"%s\"\n", p->key, g->name);
+ goto finish;
+ }
+
+ }
+
+ } else {
+ avahi_log_error("Invalid configuration file group \"%s\".\n", g->name);
+ goto finish;
+ }
+ }
+
+ r = 0;
+
+finish:
+
+ if (f)
+ avahi_ini_file_free(f);
+
+ return r;
+}
+
+static void log_function(AvahiLogLevel level, const char *txt) {
+
+ static const int log_level_map[] = {
+ LOG_ERR,
+ LOG_WARNING,
+ LOG_NOTICE,
+ LOG_INFO,
+ LOG_DEBUG
+ };
+
+ assert(level < AVAHI_LOG_LEVEL_MAX);
+ assert(txt);
+
+ if (!config.debug && level == AVAHI_LOG_DEBUG)
+ return;
+
+ daemon_log(log_level_map[level], "%s", txt);
+}
+
+static void dump(const char *text, AVAHI_GCC_UNUSED void* userdata) {
+ avahi_log_info("%s", text);
+}
+
+#ifdef HAVE_INOTIFY
+
+static int inotify_fd = -1;
+
+static void add_inotify_watches(void) {
+ int c = 0;
+ /* We ignore the return values, because one or more of these files
+ * might not exist and we're OK with that. In addition we never
+ * want to remove these watches, hence we keep their ids? */
+
+#ifdef ENABLE_CHROOT
+ c = config.use_chroot;
+#endif
+
+ inotify_add_watch(inotify_fd, c ? "/services" : AVAHI_SERVICE_DIR, IN_CLOSE_WRITE|IN_DELETE|IN_DELETE_SELF|IN_MOVED_FROM|IN_MOVED_TO|IN_MOVE_SELF
+#ifdef IN_ONLYDIR
+ |IN_ONLYDIR
+#endif
+ );
+ inotify_add_watch(inotify_fd, c ? "/" : AVAHI_CONFIG_DIR, IN_CLOSE_WRITE|IN_DELETE|IN_DELETE_SELF|IN_MOVED_FROM|IN_MOVED_TO|IN_MOVE_SELF
+#ifdef IN_ONLYDIR
+ |IN_ONLYDIR
+#endif
+ );
+}
+
+#endif
+
+#ifdef HAVE_KQUEUE
+
+#define NUM_WATCHES 2
+
+static int kq = -1;
+static int kfds[NUM_WATCHES];
+static int num_kfds = 0;
+
+static void add_kqueue_watch(const char *dir);
+
+static void add_kqueue_watches(void) {
+ int c = 0;
+
+#ifdef ENABLE_CHROOT
+ c = config.use_chroot;
+#endif
+
+ add_kqueue_watch(c ? "/" : AVAHI_CONFIG_DIR);
+ add_kqueue_watch(c ? "/services" : AVAHI_SERVICE_DIR);
+}
+
+static void add_kqueue_watch(const char *dir) {
+ int fd;
+ struct kevent ev;
+
+ if (kq < 0)
+ return;
+
+ if (num_kfds >= NUM_WATCHES)
+ return;
+
+ fd = open(dir, O_RDONLY);
+ if (fd < 0)
+ return;
+ EV_SET(&ev, fd, EVFILT_VNODE, EV_ADD | EV_ENABLE | EV_CLEAR,
+ NOTE_DELETE | NOTE_EXTEND | NOTE_WRITE | NOTE_RENAME,
+ 0, 0);
+ if (kevent(kq, &ev, 1, NULL, 0, NULL) == -1) {
+ close(fd);
+ return;
+ }
- avahi_server_config_init(&config);
+ kfds[num_kfds++] = fd;
+}
+
+#endif
+
+static void reload_config(void) {
+
+#ifdef HAVE_INOTIFY
+ /* Refresh in case the config dirs have been removed */
+ add_inotify_watches();
+#endif
+
+#ifdef HAVE_KQUEUE
+ add_kqueue_watches();
+#endif
+
+#ifdef ENABLE_CHROOT
+ static_service_load(config.use_chroot);
+ static_hosts_load(config.use_chroot);
+#else
+ static_service_load(0);
+ static_hosts_load(0);
+#endif
+ static_service_add_to_server();
+ static_hosts_add_to_server();
+
+ if (resolv_conf_entry_group)
+ avahi_s_entry_group_reset(resolv_conf_entry_group);
+
+ load_resolv_conf();
+
+ update_wide_area_servers();
+ update_browse_domains();
+
+ if (config.publish_resolv_conf && resolv_conf_name_servers && resolv_conf_name_servers[0])
+ resolv_conf_entry_group = add_dns_servers(avahi_server, resolv_conf_entry_group, resolv_conf_name_servers);
+}
+
+#ifdef HAVE_INOTIFY
+
+static void inotify_callback(AvahiWatch *watch, int fd, AVAHI_GCC_UNUSED AvahiWatchEvent event, AVAHI_GCC_UNUSED void *userdata) {
+ char* buffer;
+ int n = 0;
+
+ assert(fd == inotify_fd);
+ assert(watch);
+
+ ioctl(inotify_fd, FIONREAD, &n);
+ if (n <= 0)
+ n = 128;
+
+ buffer = avahi_malloc(n);
+ if (read(inotify_fd, buffer, n) < 0 ) {
+ avahi_free(buffer);
+ avahi_log_error("Failed to read inotify event: %s", avahi_strerror(errno));
+ return;
+ }
+ avahi_free(buffer);
+
+ avahi_log_info("Files changed, reloading.");
+ reload_config();
+}
+
+#endif
+
+#ifdef HAVE_KQUEUE
+
+static void kqueue_callback(AvahiWatch *watch, int fd, AVAHI_GCC_UNUSED AvahiWatchEvent event, AVAHI_GCC_UNUSED void *userdata) {
+ struct kevent ev;
+ struct timespec nullts = { 0, 0 };
+ int res;
+
+ assert(fd == kq);
+ assert(watch);
+
+ res = kevent(kq, NULL, 0, &ev, 1, &nullts);
+
+ if (res > 0) {
+ /* Sleep for a half-second to avoid potential races
+ * during install/uninstall. */
+ usleep(500000);
+ avahi_log_info("Files changed, reloading.");
+ reload_config();
+ } else {
+ avahi_log_error("Failed to read kqueue event: %s", avahi_strerror(errno));
+ }
+}
+
+#endif
+
+static void signal_callback(AvahiWatch *watch, AVAHI_GCC_UNUSED int fd, AVAHI_GCC_UNUSED AvahiWatchEvent event, AVAHI_GCC_UNUSED void *userdata) {
+ int sig;
+ const AvahiPoll *poll_api;
+
+ assert(watch);
+ assert(simple_poll_api);
+
+ poll_api = avahi_simple_poll_get(simple_poll_api);
+
+ if ((sig = daemon_signal_next()) <= 0) {
+ avahi_log_error("daemon_signal_next() failed");
+ poll_api->watch_free(watch);
+ return;
+ }
+
+ switch (sig) {
+ case SIGINT:
+ case SIGQUIT:
+ case SIGTERM:
+ avahi_log_info(
+ "Got %s, quitting.",
+ sig == SIGINT ? "SIGINT" :
+ (sig == SIGQUIT ? "SIGQUIT" : "SIGTERM"));
+ avahi_simple_poll_quit(simple_poll_api);
+ break;
+
+ case SIGHUP:
+ avahi_log_info("Got SIGHUP, reloading.");
+
+ reload_config();
+ 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;
+ }
+}
+
+/* Imported from ../avahi-client/nss-check.c */
+int avahi_nss_support(void);
+
+static int run_server(DaemonConfig *c) {
+ int r = -1;
+ int error;
+ const AvahiPoll *poll_api = NULL;
+ AvahiWatch *sig_watch = NULL;
+ int retval_is_sent = 0;
+#ifdef HAVE_INOTIFY
+ AvahiWatch *inotify_watch = NULL;
+#endif
+#ifdef HAVE_KQUEUE
+ int i;
+ AvahiWatch *kqueue_watch = NULL;
+#endif
+
+ assert(c);
+
+ if (!(nss_support = avahi_nss_support()))
+ avahi_log_warn("WARNING: No NSS support for mDNS detected, consider installing nss-mdns!");
+
+ if (!(simple_poll_api = avahi_simple_poll_new())) {
+ avahi_log_error("Failed to create main loop object.");
+ goto finish;
+ }
- loop = g_main_loop_new(NULL, FALSE);
+ poll_api = avahi_simple_poll_get(simple_poll_api);
- if (simple_protocol_setup(NULL) < 0)
+ 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 (!(sig_watch = poll_api->watch_new(poll_api, daemon_signal_fd(), AVAHI_WATCH_IN, signal_callback, simple_poll_api))) {
+ avahi_log_error( "Failed to create signal watcher");
+ goto finish;
+ }
-#ifdef ENABLE_DBUS
- if (dbus_protocol_setup () < 0)
+ if (simple_protocol_setup(poll_api) < 0)
goto finish;
+
+#ifdef HAVE_DBUS
+ if (c->enable_dbus) {
+ if (dbus_protocol_setup(poll_api, config.disable_user_service_publishing, !c->fail_on_missing_dbus
+#ifdef ENABLE_CHROOT
+ && !config.use_chroot
+#endif
+ ) < 0) {
+
+ avahi_log_warn("WARNING: Failed to contact D-Bus daemon.");
+
+ if (c->fail_on_missing_dbus)
+ goto finish;
+ }
+ }
+#endif
+
+#ifdef ENABLE_CHROOT
+
+ if (config.drop_root && config.use_chroot) {
+ if (chroot(AVAHI_CONFIG_DIR) < 0) {
+ avahi_log_error("Failed to chroot(): %s", strerror(errno));
+ goto finish;
+ }
+
+ avahi_log_info("Successfully called chroot().");
+ chdir("/");
+
+ if (avahi_caps_drop_all() < 0) {
+ avahi_log_error("Failed to drop capabilities.");
+ goto finish;
+ }
+ avahi_log_info("Successfully dropped remaining capabilities.");
+ }
+
+#endif
+
+#ifdef HAVE_INOTIFY
+ if ((inotify_fd = inotify_init()) < 0)
+ avahi_log_warn( "Failed to initialize inotify: %s", strerror(errno));
+ else {
+ add_inotify_watches();
+
+ if (!(inotify_watch = poll_api->watch_new(poll_api, inotify_fd, AVAHI_WATCH_IN, inotify_callback, NULL))) {
+ avahi_log_error( "Failed to create inotify watcher");
+ goto finish;
+ }
+ }
+#endif
+
+#ifdef HAVE_KQUEUE
+ if ((kq = kqueue()) < 0)
+ avahi_log_warn( "Failed to initialize kqueue: %s", strerror(errno));
+ else {
+ add_kqueue_watches();
+
+ if (!(kqueue_watch = poll_api->watch_new(poll_api, kq, AVAHI_WATCH_IN, kqueue_callback, NULL))) {
+ avahi_log_error( "Failed to create kqueue watcher");
+ goto finish;
+ }
+ }
#endif
- if (!(avahi_server = avahi_server_new(NULL, &config, server_callback, NULL)))
+ load_resolv_conf();
+#ifdef ENABLE_CHROOT
+ static_service_load(config.use_chroot);
+ static_hosts_load(config.use_chroot);
+#else
+ static_service_load(0);
+ static_hosts_load(0);
+#endif
+
+ if (!(avahi_server = avahi_server_new(poll_api, &c->server_config, server_callback, c, &error))) {
+ avahi_log_error("Failed to create server: %s", avahi_strerror(error));
goto finish;
+ }
- static_service_load();
+ update_wide_area_servers();
+ update_browse_domains();
+
+ if (c->daemonize) {
+ daemon_retval_send(0);
+ retval_is_sent = 1;
+ }
+
+ for (;;) {
+ if ((r = avahi_simple_poll_iterate(simple_poll_api, -1)) < 0) {
+
+ /* We handle signals through an FD, so let's continue */
+ if (errno == EINTR)
+ continue;
+
+ avahi_log_error("poll(): %s", strerror(errno));
+ goto finish;
+ } else if (r > 0)
+ /* Quit */
+ break;
+ }
- g_main_loop_run(loop);
- r = 0;
-
finish:
static_service_remove_from_server();
static_service_free_all();
-
+
+ static_hosts_remove_from_server();
+ static_hosts_free_all();
+
+ remove_dns_server_entry_groups();
+
simple_protocol_shutdown();
-#ifdef ENABLE_DBUS
- dbus_protocol_shutdown();
+#ifdef HAVE_DBUS
+ if (c->enable_dbus)
+ dbus_protocol_shutdown();
#endif
- if (avahi_server)
+ if (avahi_server) {
avahi_server_free(avahi_server);
-
- if (loop)
- g_main_loop_unref(loop);
+ avahi_server = NULL;
+ }
+
+ daemon_signal_done();
+
+ if (sig_watch)
+ poll_api->watch_free(sig_watch);
+
+#ifdef HAVE_INOTIFY
+ if (inotify_watch)
+ poll_api->watch_free(inotify_watch);
+ if (inotify_fd >= 0)
+ close(inotify_fd);
+#endif
+
+#ifdef HAVE_KQUEUE
+ if (kqueue_watch)
+ poll_api->watch_free(kqueue_watch);
+ if (kq >= 0)
+ close(kq);
+ for (i = 0; i < num_kfds; i++) {
+ if (kfds[i] >= 0)
+ close(kfds[i]);
+ }
+#endif
+
+ if (simple_poll_api) {
+ avahi_simple_poll_free(simple_poll_api);
+ simple_poll_api = NULL;
+ }
+
+ if (!retval_is_sent && c->daemonize)
+ daemon_retval_send(1);
+
+ return r;
+}
+
+#define set_env(key, value) putenv(avahi_strdup_printf("%s=%s", (key), (value)))
+
+static int drop_root(void) {
+ struct passwd *pw;
+ struct group * gr;
+ int 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_SETEGID)
+ if ((r = setgid(gr->gr_gid)) >= 0)
+ r = setegid(gr->gr_gid);
+#elif defined(HAVE_SETREGID)
+ r = setregid(gr->gr_gid, gr->gr_gid);
+#else
+#error "No API to drop privileges"
+#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_SETEUID)
+ if ((r = setuid(pw->pw_uid)) >= 0)
+ r = seteuid(pw->pw_uid);
+#elif defined(HAVE_SETREUID)
+ r = setreuid(pw->pw_uid, pw->pw_uid);
+#else
+#error "No API to drop privileges"
+#endif
+
+ if (r < 0) {
+ avahi_log_error("Failed to change UID: %s", strerror(errno));
+ return -1;
+ }
+
+ set_env("USER", pw->pw_name);
+ set_env("LOGNAME", pw->pw_name);
+ set_env("HOME", pw->pw_dir);
+
+ avahi_log_info("Successfully dropped root privileges.");
+
+ return 0;
+}
+
+static const char* pid_file_proc(void) {
+ return AVAHI_DAEMON_RUNTIME_DIR"/pid";
+}
+
+static int make_runtime_dir(void) {
+ int r = -1;
+ mode_t u;
+ int reset_umask = 0;
+ 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 = 1;
+
+ 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;
+}
+
+static void set_one_rlimit(int resource, rlim_t limit, const char *name) {
+ struct rlimit rl;
+ rl.rlim_cur = rl.rlim_max = limit;
+
+ if (setrlimit(resource, &rl) < 0)
+ avahi_log_warn("setrlimit(%s, {%u, %u}) failed: %s", name, (unsigned) limit, (unsigned) limit, strerror(errno));
+}
+
+static void enforce_rlimits(void) {
+#ifdef RLIMIT_AS
+ if (config.rlimit_as_set)
+ set_one_rlimit(RLIMIT_AS, config.rlimit_as, "RLIMIT_AS");
+#endif
+ if (config.rlimit_core_set)
+ set_one_rlimit(RLIMIT_CORE, config.rlimit_core, "RLIMIT_CORE");
+ if (config.rlimit_data_set)
+ set_one_rlimit(RLIMIT_DATA, config.rlimit_data, "RLIMIT_DATA");
+ if (config.rlimit_fsize_set)
+ set_one_rlimit(RLIMIT_FSIZE, config.rlimit_fsize, "RLIMIT_FSIZE");
+ if (config.rlimit_nofile_set)
+ set_one_rlimit(RLIMIT_NOFILE, config.rlimit_nofile, "RLIMIT_NOFILE");
+ if (config.rlimit_stack_set)
+ set_one_rlimit(RLIMIT_STACK, config.rlimit_stack, "RLIMIT_STACK");
+#ifdef RLIMIT_NPROC
+ if (config.rlimit_nproc_set)
+ set_one_rlimit(RLIMIT_NPROC, config.rlimit_nproc, "RLIMIT_NPROC");
+#endif
+
+ /* the sysctl() call from iface-pfroute.c needs locked memory on FreeBSD */
+#if defined(RLIMIT_MEMLOCK) && !defined(__FreeBSD__)
+ /* We don't need locked memory */
+ set_one_rlimit(RLIMIT_MEMLOCK, 0, "RLIMIT_MEMLOCK");
+#endif
+}
+
+#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[]) {
+ int r = 255;
+ int wrote_pid_file = 0;
+
+ avahi_set_log_function(log_function);
+
+ init_rand_seed();
+
+ avahi_server_config_init(&config.server_config);
+ config.command = DAEMON_RUN;
+ config.daemonize = 0;
+ config.config_file = NULL;
+#ifdef HAVE_DBUS
+ config.enable_dbus = 1;
+ config.fail_on_missing_dbus = 1;
+#endif
+
+ config.drop_root = 1;
+ config.set_rlimits = 1;
+#ifdef ENABLE_CHROOT
+ config.use_chroot = 1;
+#endif
+ config.modify_proc_title = 1;
+
+ config.disable_user_service_publishing = 0;
+ config.publish_dns_servers = NULL;
+ config.publish_resolv_conf = 0;
+ config.use_syslog = 0;
+ config.debug = 0;
+ config.rlimit_as_set = 0;
+ config.rlimit_core_set = 0;
+ config.rlimit_data_set = 0;
+ config.rlimit_fsize_set = 0;
+ config.rlimit_nofile_set = 0;
+ config.rlimit_stack_set = 0;
+#ifdef RLIMIT_NPROC
+ config.rlimit_nproc_set = 0;
+#endif
+
+ if ((argv0 = strrchr(argv[0], '/')))
+ argv0 = avahi_strdup(argv0 + 1);
+ else
+ argv0 = avahi_strdup(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.modify_proc_title)
+ avahi_init_proc_title(argc, argv);
+
+#ifdef ENABLE_CHROOT
+ config.use_chroot = config.use_chroot && config.drop_root;
+#endif
+
+ if (config.command == DAEMON_HELP) {
+ help(stdout);
+ 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 && config.drop_root) {
+ 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 receive return value from daemon process.");
+ goto finish;
+ }
+
+ r = ret;
+ goto finish;
+ }
+
+ /* Child */
+ }
+
+ if (config.use_syslog || config.daemonize)
+ daemon_log_use = DAEMON_LOG_SYSLOG;
+
+ if (sd_listen_fds(0) <= 0)
+ if (daemon_close_all(-1) < 0) {
+ avahi_log_error("Failed to close remaining file descriptors: %s", strerror(errno));
+ goto finish;
+ }
+
+ if (make_runtime_dir() < 0)
+ goto finish;
+
+ if (config.drop_root) {
+#ifdef ENABLE_CHROOT
+ if (config.use_chroot)
+ if (avahi_caps_reduce() < 0)
+ goto finish;
+#endif
+
+ if (drop_root() < 0)
+ goto finish;
+
+#ifdef ENABLE_CHROOT
+ if (config.use_chroot)
+ if (avahi_caps_reduce2() < 0)
+ goto finish;
+#endif
+ }
+
+ 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 = 1;
+
+ if (config.set_rlimits)
+ enforce_rlimits();
+
+ chdir("/");
+
+#ifdef ENABLE_CHROOT
+ if (config.drop_root && config.use_chroot)
+ if (avahi_chroot_helper_start(argv0) < 0) {
+ avahi_log_error("failed to start chroot() helper daemon.");
+ goto finish;
+ }
+#endif
+ avahi_log_info("%s "PACKAGE_VERSION" starting up.", argv0);
+
+ avahi_set_proc_title(argv0, "%s: starting up", argv0);
+
+ if (run_server(&config) == 0)
+ r = 0;
+ }
+
+finish:
+
+ if (config.daemonize)
+ daemon_retval_done();
+
+ avahi_server_config_free(&config.server_config);
+ avahi_free(config.config_file);
+ avahi_strfreev(config.publish_dns_servers);
+ avahi_strfreev(resolv_conf_name_servers);
+ avahi_strfreev(resolv_conf_search_domains);
+
+ if (wrote_pid_file) {
+#ifdef ENABLE_CHROOT
+ avahi_chroot_helper_unlink(pid_file_proc());
+#else
+ daemon_pid_file_remove();
+#endif
+ }
+
+#ifdef ENABLE_CHROOT
+ avahi_chroot_helper_shutdown();
+#endif
- avahi_server_config_free(&config);
+ avahi_free(argv0);
return r;
}
projects / catta / blobdiff