19 #include "gcc-compat.h"
32 struct gengetopt_args_info conf;
33 char *dss_error_txt = NULL;
35 static int signal_pipe;
37 /** Process id of current rsync process. */
38 static pid_t rsync_pid;
39 /** Whether the rsync process is currently stopped */
40 static int rsync_stopped;
41 /** Process id of current rm process. */
43 /** When the next snapshot is due. */
44 struct timeval next_snapshot_time;
45 /* Creation time of the snapshot currently being created. */
46 int64_t current_snapshot_creation_time;
52 /* a litte cpp magic helps to DRY */
58 #define COMMAND(x) int com_ ##x(void);
61 #define COMMAND(x) if (conf.x ##_given) return com_ ##x();
62 int call_command_handler(void)
65 DSS_EMERG_LOG("BUG: did not find command handler\n");
72 * complete, not being deleted: 1204565370-1204565371.Sun_Mar_02_2008_14_33-Sun_Mar_02_2008_14_43
73 * complete, being deleted: 1204565370-1204565371.being_deleted
74 * incomplete, not being deleted: 1204565370-incomplete
75 * incomplete, being deleted: 1204565370-incomplete.being_deleted
77 enum snapshot_status_flags {
78 /** The rsync process terminated successfully. */
80 /** The rm process is running to remove this snapshot. */
86 int64_t creation_time;
87 int64_t completion_time;
88 enum snapshot_status_flags flags;
93 * An edge snapshot is either the oldest one or the newest one.
95 * We need to find either of them occasionally: The create code
96 * needs to know the newest snapshot because that is the one
97 * used as the link destination dir. The pruning code needs to
98 * find the oldest one in case disk space becomes low.
100 struct edge_snapshot_data {
102 struct snapshot snap;
105 __printf_2_3 void dss_log(int ll, const char* fmt,...)
113 if (ll < conf.loglevel_arg)
115 outfd = logfile? logfile : stderr;
118 strftime(str, sizeof(str), "%b %d %H:%M:%S", tm);
119 fprintf(outfd, "%s ", str);
120 if (conf.loglevel_arg <= INFO)
121 fprintf(outfd, "%i: ", ll);
123 vfprintf(outfd, fmt, argp);
128 * Print a message either to stdout or to the log file.
130 __printf_1_2 void dss_msg(const char* fmt,...)
132 FILE *outfd = conf.daemon_given? logfile : stdout;
135 vfprintf(outfd, fmt, argp);
140 * Return the desired number of snapshots of an interval.
142 unsigned num_snapshots(int interval)
146 assert(interval >= 0);
148 if (interval >= conf.num_intervals_arg)
150 n = conf.num_intervals_arg - interval - 1;
154 /* return: Whether dirname is a snapshot directory (0: no, 1: yes) */
155 int is_snapshot(const char *dirname, int64_t now, struct snapshot *s)
158 char *dash, *dot, *tmp;
162 dash = strchr(dirname, '-');
163 if (!dash || !dash[1] || dash == dirname)
165 for (i = 0; dirname[i] != '-'; i++)
166 if (!isdigit(dirname[i]))
168 tmp = dss_strdup(dirname);
170 ret = dss_atoi64(tmp, &num);
179 s->creation_time = num;
180 //DSS_DEBUG_LOG("%s start time: %lli\n", dirname, (long long)s->creation_time);
181 s->interval = (long long) ((now - s->creation_time)
182 / conf.unit_interval_arg / 24 / 3600);
183 if (!strcmp(dash + 1, "incomplete")) {
184 s->completion_time = -1;
185 s->flags = 0; /* neither complete, nor being deleted */
188 if (!strcmp(dash + 1, "incomplete.being_deleted")) {
189 s->completion_time = -1;
190 s->flags = SS_BEING_DELETED; /* mot cpmplete, being deleted */
194 dot = strchr(tmp, '.');
195 if (!dot || !dot[1] || dot == tmp)
197 for (i = 0; tmp[i] != '.'; i++)
198 if (!isdigit(tmp[i]))
200 tmp = dss_strdup(dash + 1);
202 ret = dss_atoi64(tmp, &num);
210 s->completion_time = num;
211 s->flags = SS_COMPLETE;
212 if (!strcmp(dot + 1, "being_deleted"))
213 s->flags |= SS_BEING_DELETED;
215 s->name = dss_strdup(dirname);
219 int64_t get_current_time(void)
223 DSS_DEBUG_LOG("now: %lli\n", (long long) now);
227 char *incomplete_name(int64_t start)
229 return make_message("%lli-incomplete", (long long)start);
232 char *being_deleted_name(struct snapshot *s)
234 if (s->flags & SS_COMPLETE)
235 return make_message("%lli-%lli.being_deleted",
236 (long long)s->creation_time,
237 (long long)s->completion_time);
238 return make_message("%lli-incomplete.being_deleted",
239 (long long)s->creation_time);
242 int complete_name(int64_t start, int64_t end, char **result)
244 struct tm start_tm, end_tm;
245 time_t *start_seconds = (time_t *) (uint64_t *)&start; /* STFU, gcc */
246 time_t *end_seconds = (time_t *) (uint64_t *)&end; /* STFU, gcc */
247 char start_str[200], end_str[200];
249 if (!localtime_r(start_seconds, &start_tm)) {
250 make_err_msg("%lli", (long long)start);
253 if (!localtime_r(end_seconds, &end_tm)) {
254 make_err_msg("%lli", (long long)end);
257 if (!strftime(start_str, sizeof(start_str), "%a_%b_%d_%Y_%H_%M_%S", &start_tm)) {
258 make_err_msg("%lli", (long long)start);
261 if (!strftime(end_str, sizeof(end_str), "%a_%b_%d_%Y_%H_%M_%S", &end_tm)) {
262 make_err_msg("%lli", (long long)end);
265 *result = make_message("%lli-%lli.%s-%s", (long long) start, (long long) end,
270 struct snapshot_list {
272 unsigned num_snapshots;
274 struct snapshot **snapshots;
276 * Array of size num_intervals + 1
278 * It contains the number of snapshots in each interval. interval_count[num_intervals]
279 * is the number of snapshots which belong to any interval greater than num_intervals.
281 unsigned *interval_count;
284 #define FOR_EACH_SNAPSHOT(s, i, sl) \
285 for ((i) = 0; (i) < (sl)->num_snapshots && ((s) = (sl)->snapshots[(i)]); (i)++)
289 #define NUM_COMPARE(x, y) ((int)((x) < (y)) - (int)((x) > (y)))
291 static int compare_snapshots(const void *a, const void *b)
293 struct snapshot *s1 = *(struct snapshot **)a;
294 struct snapshot *s2 = *(struct snapshot **)b;
295 return NUM_COMPARE(s2->creation_time, s1->creation_time);
298 /** Compute the minimum of \a a and \a b. */
299 #define DSS_MIN(a,b) ((a) < (b) ? (a) : (b))
301 int add_snapshot(const char *dirname, void *private)
303 struct snapshot_list *sl = private;
305 int ret = is_snapshot(dirname, sl->now, &s);
309 if (sl->num_snapshots >= sl->array_size) {
310 sl->array_size = 2 * sl->array_size + 1;
311 sl->snapshots = dss_realloc(sl->snapshots,
312 sl->array_size * sizeof(struct snapshot *));
314 sl->snapshots[sl->num_snapshots] = dss_malloc(sizeof(struct snapshot));
315 *(sl->snapshots[sl->num_snapshots]) = s;
316 sl->interval_count[DSS_MIN(s.interval, conf.num_intervals_arg)]++;
321 void get_snapshot_list(struct snapshot_list *sl)
323 sl->now = get_current_time();
324 sl->num_snapshots = 0;
326 sl->snapshots = NULL;
327 sl->interval_count = dss_calloc((conf.num_intervals_arg + 1) * sizeof(unsigned));
328 for_each_subdir(add_snapshot, sl);
329 qsort(sl->snapshots, sl->num_snapshots, sizeof(struct snapshot *),
333 void free_snapshot_list(struct snapshot_list *sl)
338 FOR_EACH_SNAPSHOT(s, i, sl) {
342 free(sl->interval_count);
343 sl->interval_count = NULL;
345 sl->snapshots = NULL;
346 sl->num_snapshots = 0;
349 void stop_rsync_process(void)
351 if (!rsync_pid || rsync_stopped)
353 kill(SIGSTOP, rsync_pid);
357 void restart_rsync_process(void)
359 if (!rsync_pid || !rsync_stopped)
361 kill (SIGCONT, rsync_pid);
366 * Print a log message about the exit status of a child.
368 void log_termination_msg(pid_t pid, int status)
370 if (WIFEXITED(status))
371 DSS_INFO_LOG("child %i exited. Exit status: %i\n", (int)pid,
372 WEXITSTATUS(status));
373 else if (WIFSIGNALED(status))
374 DSS_NOTICE_LOG("child %i was killed by signal %i\n", (int)pid,
377 DSS_WARNING_LOG("child %i terminated abormally\n", (int)pid);
380 int wait_for_process(pid_t pid, int *status)
384 DSS_DEBUG_LOG("Waiting for process %d to terminate\n", (int)pid);
389 FD_SET(signal_pipe, &rfds);
390 ret = dss_select(signal_pipe + 1, &rfds, NULL, NULL);
396 if (ret == SIGCHLD) {
397 ret = waitpid(pid, status, 0);
400 if (errno != EINTR) { /* error */
401 ret = -ERRNO_TO_DSS_ERROR(errno);
405 /* SIGINT or SIGTERM */
406 DSS_WARNING_LOG("sending SIGTERM to pid %d\n", (int)pid);
410 make_err_msg("failed to wait for process %d", (int)pid);
412 log_termination_msg(pid, *status);
416 int remove_snapshot(struct snapshot *s)
418 int fds[3] = {0, 0, 0};
420 char *new_name = being_deleted_name(s);
421 int ret = dss_rename(s->name, new_name);
422 char *argv[] = {"rm", "-rf", new_name, NULL};
426 DSS_NOTICE_LOG("removing %s (interval = %i)\n", s->name, s->interval);
427 stop_rsync_process();
428 ret = dss_exec(&rm_pid, argv[0], argv, fds);
435 * return: 0: no redundant snapshots, 1: rm process started, negative: error
437 int remove_redundant_snapshot(struct snapshot_list *sl)
439 int ret, i, interval;
441 unsigned missing = 0;
443 DSS_INFO_LOG("looking for intervals containing too many snapshots\n");
444 for (interval = conf.num_intervals_arg - 1; interval >= 0; interval--) {
445 unsigned keep = num_snapshots(interval);
446 unsigned num = sl->interval_count[interval];
447 struct snapshot *victim = NULL, *prev = NULL;
448 int64_t score = LONG_MAX;
451 missing += keep - num;
452 DSS_DEBUG_LOG("interval %i: keep: %u, have: %u, missing: %u\n",
453 interval, keep, num, missing);
454 if (keep + missing >= num)
456 /* redundant snapshot in this interval, pick snapshot with lowest score */
457 FOR_EACH_SNAPSHOT(s, i, sl) {
460 //DSS_DEBUG_LOG("checking %s\n", s->name);
461 if (s->interval > interval) {
465 if (s->interval < interval)
473 /* check if s is a better victim */
474 this_score = s->creation_time - prev->creation_time;
475 assert(this_score >= 0);
476 //DSS_DEBUG_LOG("%s: score %lli\n", s->name, (long long)score);
477 if (this_score < score) {
484 if (conf.dry_run_given) {
485 dss_msg("%s would be removed (interval = %i)\n",
486 victim->name, victim->interval);
489 ret = remove_snapshot(victim);
490 return ret < 0? ret : 1;
495 int remove_outdated_snapshot(struct snapshot_list *sl)
500 DSS_INFO_LOG("looking for snapshots belonging to intervals greater than %d\n",
501 conf.num_intervals_arg);
502 FOR_EACH_SNAPSHOT(s, i, sl) {
503 if (s->interval <= conf.num_intervals_arg)
505 if (conf.dry_run_given) {
506 dss_msg("%s would be removed (interval = %i)\n",
507 s->name, s->interval);
510 ret = remove_snapshot(s);
518 int handle_rm_exit(int status)
522 if (!WIFEXITED(status)) {
523 make_err_msg("rm process %d died involuntary", (int)rm_pid);
524 ret = -E_INVOLUNTARY_EXIT;
527 es = WEXITSTATUS(status);
529 make_err_msg("rm process %d returned %d", (int)rm_pid, es);
530 ret = -E_BAD_EXIT_CODE;
539 int wait_for_rm_process(void)
541 int status, ret = wait_for_process(rm_pid, &status);
545 return handle_rm_exit(status);
548 void kill_process(pid_t pid)
552 DSS_WARNING_LOG("sending SIGTERM to pid %d\n", (int)pid);
556 int check_config(void)
558 if (conf.unit_interval_arg <= 0) {
559 make_err_msg("bad unit interval: %i", conf.unit_interval_arg);
560 return -E_INVALID_NUMBER;
562 DSS_DEBUG_LOG("unit interval: %i day(s)\n", conf.unit_interval_arg);
563 if (conf.num_intervals_arg <= 0) {
564 make_err_msg("bad number of intervals %i", conf.num_intervals_arg);
565 return -E_INVALID_NUMBER;
567 DSS_DEBUG_LOG("number of intervals: %i\n", conf.num_intervals_arg);
571 /* exits on errors */
572 void parse_config_file(int override)
577 char *old_logfile_arg = NULL;
578 int old_daemon_given = 0;
580 if (conf.config_file_given)
581 config_file = dss_strdup(conf.config_file_arg);
583 char *home = get_homedir();
584 config_file = make_message("%s/.dssrc", home);
587 if (override) { /* SIGHUP */
588 if (conf.logfile_given)
589 old_logfile_arg = dss_strdup(conf.logfile_arg);
590 old_daemon_given = conf.daemon_given;
593 ret = stat(config_file, &statbuf);
594 if (ret && conf.config_file_given) {
595 ret = -ERRNO_TO_DSS_ERROR(errno);
596 make_err_msg("failed to stat config file %s", config_file);
600 struct cmdline_parser_params params = {
601 .override = override,
606 cmdline_parser_config_file(config_file, &conf, ¶ms);
608 ret = check_config();
612 /* don't change daemon mode on SIGHUP */
613 conf.daemon_given = old_daemon_given;
616 if (conf.logfile_given)
617 free(old_logfile_arg);
618 else if (conf.daemon_given) { /* re-use old logfile */
619 conf.logfile_arg = old_logfile_arg;
620 conf.logfile_given = 1;
623 if (conf.logfile_given) {
624 logfile = open_log(conf.logfile_arg);
625 log_welcome(conf.loglevel_arg);
627 ret = dss_chdir(conf.dest_dir_arg);
632 log_err_msg(EMERG, -ret);
636 void handle_sighup(void)
638 DSS_NOTICE_LOG("SIGHUP\n");
639 parse_config_file(1);
642 int rename_incomplete_snapshot(int64_t start)
644 char *old_name, *new_name;
647 ret = complete_name(start, get_current_time(), &new_name);
650 old_name = incomplete_name(start);
651 ret = dss_rename(old_name, new_name);
653 DSS_NOTICE_LOG("%s -> %s\n", old_name, new_name);
659 int handle_rsync_exit(int status)
663 if (!WIFEXITED(status)) {
664 make_err_msg("rsync process %d died involuntary", (int)rsync_pid);
665 ret = -E_INVOLUNTARY_EXIT;
668 es = WEXITSTATUS(status);
669 if (es != 0 && es != 23 && es != 24) {
670 make_err_msg("rsync process %d returned %d", (int)rsync_pid, es);
671 ret = -E_BAD_EXIT_CODE;
674 ret = rename_incomplete_snapshot(current_snapshot_creation_time);
677 current_snapshot_creation_time = 0;
682 int get_newest_complete(const char *dirname, void *private)
684 struct edge_snapshot_data *esd = private;
686 int ret = is_snapshot(dirname, esd->now, &s);
690 if (s.flags != SS_COMPLETE) /* incomplete or being deleted */
692 if (s.creation_time < esd->snap.creation_time)
694 free(esd->snap.name);
699 __malloc char *name_of_newest_complete_snapshot(void)
701 struct edge_snapshot_data esd = {
702 .now = get_current_time(),
703 .snap = {.creation_time = -1}
705 for_each_subdir(get_newest_complete, &esd);
706 return esd.snap.name;
709 void create_rsync_argv(char ***argv, int64_t *num)
711 char *logname, *newest = name_of_newest_complete_snapshot();
714 *argv = dss_malloc((15 + conf.rsync_option_given) * sizeof(char *));
715 (*argv)[i++] = dss_strdup("rsync");
716 (*argv)[i++] = dss_strdup("-aq");
717 (*argv)[i++] = dss_strdup("--delete");
718 for (j = 0; j < conf.rsync_option_given; j++)
719 (*argv)[i++] = dss_strdup(conf.rsync_option_arg[j]);
721 DSS_INFO_LOG("using %s as reference snapshot\n", newest);
722 (*argv)[i++] = make_message("--link-dest=../%s", newest);
725 DSS_INFO_LOG("no previous snapshot found\n");
726 if (conf.exclude_patterns_given) {
727 (*argv)[i++] = dss_strdup("--exclude-from");
728 (*argv)[i++] = dss_strdup(conf.exclude_patterns_arg);
731 logname = dss_logname();
732 if (conf.remote_user_given && !strcmp(conf.remote_user_arg, logname))
733 (*argv)[i++] = dss_strdup(conf.source_dir_arg);
735 (*argv)[i++] = make_message("%s@%s:%s/", conf.remote_user_given?
736 conf.remote_user_arg : logname,
737 conf.remote_host_arg, conf.source_dir_arg);
739 *num = get_current_time();
740 (*argv)[i++] = incomplete_name(*num);
742 for (j = 0; j < i; j++)
743 DSS_DEBUG_LOG("argv[%d] = %s\n", j, (*argv)[j]);
746 void free_rsync_argv(char **argv)
749 for (i = 0; argv[i]; i++)
754 int create_snapshot(char **argv)
756 int fds[3] = {0, 0, 0};
757 char *name = incomplete_name(current_snapshot_creation_time);
759 DSS_NOTICE_LOG("creating new snapshot %s\n", name);
761 return dss_exec(&rsync_pid, argv[0], argv, fds);
764 void compute_next_snapshot_time(struct snapshot_list *sl)
766 struct timeval now, unit_interval = {.tv_sec = 24 * 3600 * conf.unit_interval_arg},
769 unsigned wanted = num_snapshots(0), num_complete_snapshots = 0;
773 gettimeofday(&now, NULL);
774 FOR_EACH_SNAPSHOT(s, i, sl) {
775 if (!(s->flags & SS_COMPLETE))
777 num_complete_snapshots++;
778 x += s->completion_time - s->creation_time;
781 if (num_complete_snapshots)
782 x /= num_complete_snapshots; /* avg time to create one snapshot */
783 x *= wanted; /* time to create all snapshots in interval 0 */
786 ret = tv_diff(&unit_interval, &tmp, &diff); /* time between creation */
788 next_snapshot_time = now;
791 tv_divide(wanted, &diff, &tmp);
792 tv_add(&now, &tmp, &next_snapshot_time);
795 void handle_signal(void)
797 int sig, ret = next_signal();
807 restart_rsync_process();
808 kill_process(rsync_pid);
809 kill_process(rm_pid);
816 ret = reap_child(&pid, &status);
819 assert(pid == rsync_pid || pid == rm_pid);
820 if (pid == rsync_pid)
821 ret = handle_rsync_exit(status);
823 ret = handle_rm_exit(status);
827 log_err_msg(ERROR, -ret);
830 int get_oldest(const char *dirname, void *private)
832 struct edge_snapshot_data *esd = private;
834 int ret = is_snapshot(dirname, esd->now, &s);
838 if (s.creation_time > esd->snap.creation_time)
840 free(esd->snap.name);
845 int remove_oldest_snapshot()
848 struct edge_snapshot_data esd = {
849 .now = get_current_time(),
850 .snap = {.creation_time = LLONG_MAX}
852 for_each_subdir(get_oldest, &esd);
853 if (!esd.snap.name) /* no snapshot found */
855 DSS_INFO_LOG("oldest snapshot: %s\n", esd.snap.name);
857 if (esd.snap.creation_time == current_snapshot_creation_time)
858 goto out; /* do not remove the snapshot currently being created */
859 ret = remove_snapshot(&esd.snap);
865 /* TODO: Also consider number of inodes. */
866 int disk_space_low(void)
868 struct disk_space ds;
869 int ret = get_disk_space(".", &ds);
873 if (conf.min_free_mb_arg)
874 if (ds.free_mb < conf.min_free_mb_arg)
876 if (conf.min_free_percent_arg)
877 if (ds.percent_free < conf.min_free_percent_arg)
882 int try_to_free_disk_space(int low_disk_space, struct snapshot_list *sl)
886 ret = remove_outdated_snapshot(sl);
887 if (ret) /* error, or we are removing something */
889 /* no outdated snapshot */
890 ret = remove_redundant_snapshot(sl);
895 DSS_WARNING_LOG("disk space low and nothing obvious to remove\n");
896 ret = remove_oldest_snapshot();
899 make_err_msg("uhuhu: not enough disk space for a single snapshot");
903 int select_loop(void)
906 struct timeval tv = {.tv_sec = 0, .tv_usec = 0};
907 struct snapshot_list sl = {.num_snapshots = 0};
910 struct timeval now, *tvp = &tv;
915 free_snapshot_list(&sl);
916 get_snapshot_list(&sl);
917 compute_next_snapshot_time(&sl);
919 FD_SET(signal_pipe, &rfds);
924 ret = dss_select(signal_pipe + 1, &rfds, NULL, tvp);
927 if (FD_ISSET(signal_pipe, &rfds)) {
933 ret = disk_space_low();
936 low_disk_space = ret;
938 stop_rsync_process();
939 ret = try_to_free_disk_space(low_disk_space, &sl);
945 restart_rsync_process();
948 /* neither rsync nor rm are running. Start rsync? */
949 gettimeofday(&now, NULL);
950 if (tv_diff(&next_snapshot_time, &now, &tv) > 0)
952 create_rsync_argv(&rsync_argv, ¤t_snapshot_creation_time);
953 ret = create_snapshot(rsync_argv);
954 free_rsync_argv(rsync_argv);
958 free_snapshot_list(&sl);
966 if (conf.dry_run_given) {
967 make_err_msg("dry_run not supported by this command");
970 ret = install_sighandler(SIGHUP);
973 return select_loop();
976 void log_disk_space(struct disk_space *ds)
978 DSS_INFO_LOG("free: %uM/%uM (%u%%), %u%% inodes unused\n",
979 ds->free_mb, ds->total_mb, ds->percent_free,
980 ds->percent_free_inodes);
986 struct snapshot_list sl;
987 struct disk_space ds;
989 ret = get_disk_space(".", &ds);
994 get_snapshot_list(&sl);
995 ret = remove_outdated_snapshot(&sl);
996 free_snapshot_list(&sl);
1001 ret = wait_for_rm_process();
1006 get_snapshot_list(&sl);
1007 ret = remove_redundant_snapshot(&sl);
1008 free_snapshot_list(&sl);
1013 ret = wait_for_rm_process();
1022 int com_create(void)
1027 create_rsync_argv(&rsync_argv, ¤t_snapshot_creation_time);
1028 if (conf.dry_run_given) {
1031 for (i = 0; rsync_argv[i]; i++) {
1033 msg = make_message("%s%s%s", tmp? tmp : "",
1034 tmp? " " : "", rsync_argv[i]);
1037 dss_msg("%s\n", msg);
1041 ret = create_snapshot(rsync_argv);
1044 ret = wait_for_process(rsync_pid, &status);
1047 ret = handle_rsync_exit(status);
1049 free_rsync_argv(rsync_argv);
1056 struct snapshot_list sl;
1058 get_snapshot_list(&sl);
1059 FOR_EACH_SNAPSHOT(s, i, &sl)
1060 dss_msg("%u\t%s\n", s->interval, s->name);
1061 free_snapshot_list(&sl);
1065 __noreturn void clean_exit(int status)
1067 free(dss_error_txt);
1070 static void setup_signal_handling(void)
1074 DSS_INFO_LOG("setting up signal handlers\n");
1075 signal_pipe = signal_init(); /* always successful */
1076 ret = install_sighandler(SIGINT);
1079 ret = install_sighandler(SIGTERM);
1082 ret = install_sighandler(SIGCHLD);
1087 DSS_EMERG_LOG("could not install signal handlers\n");
1091 int main(int argc, char **argv)
1094 struct cmdline_parser_params params = {
1097 .check_required = 0,
1098 .check_ambiguity = 0
1101 cmdline_parser_ext(argc, argv, &conf, ¶ms); /* aborts on errors */
1102 parse_config_file(0);
1104 if (conf.daemon_given)
1106 setup_signal_handling();
1107 ret = call_command_handler();
1109 log_err_msg(EMERG, -ret);
1110 clean_exit(ret >= 0? EXIT_SUCCESS : EXIT_FAILURE);