/***
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
USA.
***/
#ifdef HAVE_CONFIG_H
#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>
#ifdef HAVE_SYS_FILIO_H
#include <sys/filio.h>
#endif
#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>
#include <avahi-core/util.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"
#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;
typedef enum {
DAEMON_RUN,
DAEMON_KILL,
DAEMON_VERSION,
DAEMON_HELP,
DAEMON_RELOAD,
DAEMON_CHECK
} DaemonCommand;
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;
unsigned n_clients_max;
unsigned n_objects_per_client_max;
unsigned n_entries_per_entry_group_max;
#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 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;
}
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);
avahi_string_list_free(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));
sd_notifyf(0, "STATUS=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;
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);
sd_notifyf(0, "STATUS=Host name conflict, retrying with %s", n);
avahi_set_proc_title(argv0, "%s: collision [%s]", argv0, 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)));
sd_notifyf(0, "STATUS=Server error: %s", avahi_strerror(avahi_server_errno(s)));
avahi_simple_poll_quit(simple_poll_api);
break;
case AVAHI_SERVER_REGISTERING:
sd_notifyf(0, "STATUS=Registering host name %s", avahi_server_get_host_name_fqdn(s));
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;
#ifdef DAEMON_SET_VERBOSITY_AVAILABLE
daemon_set_verbosity(LOG_DEBUG);
#endif
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 parse_unsigned(const char *s, unsigned *u) {
char *e = NULL;
unsigned long ul;
unsigned k;
errno = 0;
ul = strtoul(s, &e, 0);
if (!e || *e || errno != 0)
return -1;
k = (unsigned) ul;
if ((unsigned long) k != ul)
return -1;
*u = k;
return 0;
}
static int parse_usec(const char *s, AvahiUsec *u) {
char *e = NULL;
unsigned long long ull;
AvahiUsec k;
errno = 0;
ull = strtoull(s, &e, 0);
if (!e || *e || errno != 0)
return -1;
k = (AvahiUsec) ull;
if ((unsigned long long) k != ull)
return -1;
*u = k;
return 0;
}
static char *get_machine_id(void) {
int fd;
char buf[32];
fd = open("/etc/machine-id", O_RDONLY|O_CLOEXEC|O_NOCTTY);
if (fd == -1 && errno == ENOENT)
fd = open("/var/lib/dbus/machine-id", O_RDONLY|O_CLOEXEC|O_NOCTTY);
if (fd == -1)
return NULL;
/* File is on a filesystem so we never get EINTR or partial reads */
if (read(fd, buf, sizeof buf) != sizeof buf) {
close(fd);
return NULL;
}
close(fd);
/* Contents can be lower, upper and even mixed case so normalize */
avahi_strdown(buf);
return avahi_strndup(buf, sizeof buf);
}
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);
else if (strcasecmp(p->key, "host-name-from-machine-id") == 0) {
if (*(p->value) == 'y' || *(p->value) == 'Y') {
char *machine_id = get_machine_id();
if (machine_id != NULL) {
avahi_free(c->server_config.host_name);
c->server_config.host_name = machine_id;
}
}
}
#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 if (strcasecmp(p->key, "ratelimit-interval-usec") == 0) {
AvahiUsec k;
if (parse_usec(p->value, &k) < 0) {
avahi_log_error("Invalid ratelimit-interval-usec setting %s", p->value);
goto finish;
}
c->server_config.ratelimit_interval = k;
} else if (strcasecmp(p->key, "ratelimit-burst") == 0) {
unsigned k;
if (parse_unsigned(p->value, &k) < 0) {
avahi_log_error("Invalid ratelimit-burst setting %s", p->value);
goto finish;
}
c->server_config.ratelimit_burst = k;
} else if (strcasecmp(p->key, "cache-entries-max") == 0) {
unsigned k;
if (parse_unsigned(p->value, &k) < 0) {
avahi_log_error("Invalid cache-entries-max setting %s", p->value);
goto finish;
}
c->server_config.n_cache_entries_max = k;
#ifdef HAVE_DBUS
} else if (strcasecmp(p->key, "clients-max") == 0) {
unsigned k;
if (parse_unsigned(p->value, &k) < 0) {
avahi_log_error("Invalid clients-max setting %s", p->value);
goto finish;
}
c->n_clients_max = k;
} else if (strcasecmp(p->key, "objects-per-client-max") == 0) {
unsigned k;
if (parse_unsigned(p->value, &k) < 0) {
avahi_log_error("Invalid objects-per-client-max setting %s", p->value);
goto finish;
}
c->n_objects_per_client_max = k;
} else if (strcasecmp(p->key, "entries-per-entry-group-max") == 0) {
unsigned k;
if (parse_unsigned(p->value, &k) < 0) {
avahi_log_error("Invalid entries-per-entry-group-max setting %s", p->value);
goto finish;
}
c->n_entries_per_entry_group_max = k;
#endif
} 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;
}
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 SIGTERM:
avahi_log_info(
"Got %s, quitting.",
sig == SIGINT ? "SIGINT" : "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 void ignore_signal(int sig) {
struct sigaction sa;
memset(&sa, 0, sizeof(sa));
sa.sa_handler = SIG_IGN;
sa.sa_flags = SA_RESTART;
sigaction(sig, &sa, NULL);
}
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);
ignore_signal(SIGPIPE);
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;
}
poll_api = avahi_simple_poll_get(simple_poll_api);
if (daemon_signal_init(SIGINT, 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;
}
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,
config.n_clients_max,
config.n_objects_per_client_max,
config.n_entries_per_entry_group_max,
!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
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;
}
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;
}
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 HAVE_DBUS
if (c->enable_dbus)
dbus_protocol_shutdown();
#endif
if (avahi_server) {
avahi_server_free(avahi_server);
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__) && !defined(__FreeBSD_kernel__)
/* 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;
config.n_clients_max = 0;
config.n_objects_per_client_max = 0;
config.n_entries_per_entry_group_max = 0;
#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_warn("Failed to close all remaining file descriptors: %s", strerror(errno));
daemon_reset_sigs(-1);
daemon_unblock_sigs(-1);
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);
sd_notifyf(0, "STATUS=%s "PACKAGE_VERSION" starting up.", argv0);
avahi_set_proc_title(argv0, "%s: starting up", argv0);
if (run_server(&config) == 0)
r = 0;
avahi_log_info("%s "PACKAGE_VERSION" exiting.", argv0);
sd_notifyf(0, "STATUS=%s "PACKAGE_VERSION" exiting.", argv0);
}
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_free(argv0);
return r;
}