+++ /dev/null
-/***
- 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>
-#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;
- 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;
-}
projects / catta / blobdiff