struct gengetopt_args_info conf;
char *dss_error_txt = NULL;
static FILE *logfile;
-int signal_pipe;
+static int signal_pipe;
/** Process id of current rsync process. */
static pid_t rsync_pid;
* incomplete, being deleted: 1204565370-incomplete.being_deleted
*/
enum snapshot_status_flags {
+ /** The rsync process terminated successfully. */
SS_COMPLETE = 1,
+ /** The rm process is running to remove this snapshot. */
SS_BEING_DELETED = 2,
};
return 1 << n;
}
+/* return: Whether dirname is a snapshot directory (0: no, 1: yes) */
int is_snapshot(const char *dirname, int64_t now, struct snapshot *s)
{
int i, ret;
compare_snapshots);
}
+void free_snapshot_list(struct snapshot_list *sl)
+{
+ int i;
+ struct snapshot *s;
+
+ FOR_EACH_SNAPSHOT(s, i, sl) {
+ free(s->name);
+ free(s);
+ }
+ free(sl->interval_count);
+ sl->interval_count = NULL;
+ free(sl->snapshots);
+ sl->snapshots = NULL;
+ sl->num_snapshots = 0;
+}
+
void stop_rsync_process(void)
{
if (!rsync_pid || rsync_stopped)
rsync_stopped = 0;
}
-void free_snapshot_list(struct snapshot_list *sl)
-{
- int i;
- struct snapshot *s;
-
- FOR_EACH_SNAPSHOT(s, i, sl) {
- free(s->name);
- free(s);
- }
- free(sl->interval_count);
- free(sl->snapshots);
-}
-
/**
* Print a log message about the exit status of a child.
*/
for (;;) {
pause();
ret = next_signal();
- if (ret < 0)
+ if (ret < 0)
break;
if (!ret)
continue;
ret = waitpid(pid, status, 0);
if (ret >= 0)
break;
- if (errno != EINTR) /* error */
+ if (errno != EINTR) { /* error */
+ ret = -ERRNO_TO_DSS_ERROR(errno);
break;
+ }
}
+ /* SIGINT or SIGTERM */
DSS_WARNING_LOG("sending SIGTERM to pid %d\n", (int)pid);
kill(pid, SIGTERM);
}
- if (ret < 0) {
- ret = -ERRNO_TO_DSS_ERROR(errno);
+ if (ret < 0)
make_err_msg("failed to wait for process %d", (int)pid);
- } else
+ else
log_termination_msg(pid, *status);
return ret;
}
free(new_name);
return ret;
}
+
/*
* return: 0: no redundant snapshots, 1: rm process started, negative: error
*/
return ret;
}
-
int wait_for_rm_process(void)
{
int status, ret = wait_for_process(rm_pid, &status);
kill(pid, SIGTERM);
}
-void handle_sighup()
+int check_config(void)
+{
+ if (conf.unit_interval_arg <= 0) {
+ make_err_msg("bad unit interval: %i", conf.unit_interval_arg);
+ return -E_INVALID_NUMBER;
+ }
+ DSS_DEBUG_LOG("unit interval: %i day(s)\n", conf.unit_interval_arg);
+ if (conf.num_intervals_arg <= 0) {
+ make_err_msg("bad number of intervals %i", conf.num_intervals_arg);
+ return -E_INVALID_NUMBER;
+ }
+ DSS_DEBUG_LOG("number of intervals: %i\n", conf.num_intervals_arg);
+ return 1;
+}
+
+/* exits on errors */
+void parse_config_file(int override)
+{
+ int ret;
+ char *config_file;
+ struct stat statbuf;
+ char *old_logfile_arg = NULL;
+ int old_daemon_given = 0;
+
+ if (conf.config_file_given)
+ config_file = dss_strdup(conf.config_file_arg);
+ else {
+ char *home = get_homedir();
+ config_file = make_message("%s/.dssrc", home);
+ free(home);
+ }
+ if (override) { /* SIGHUP */
+ if (conf.logfile_given)
+ old_logfile_arg = dss_strdup(conf.logfile_arg);
+ old_daemon_given = conf.daemon_given;
+ }
+
+ ret = stat(config_file, &statbuf);
+ if (ret && conf.config_file_given) {
+ ret = -ERRNO_TO_DSS_ERROR(errno);
+ make_err_msg("failed to stat config file %s", config_file);
+ goto out;
+ }
+ if (!ret) {
+ struct cmdline_parser_params params = {
+ .override = override,
+ .initialize = 0,
+ .check_required = 0,
+ .check_ambiguity = 0
+ };
+ cmdline_parser_config_file(config_file, &conf, ¶ms);
+ }
+ if (!conf.source_dir_given || !conf.dest_dir_given) {
+ ret = -E_SYNTAX;
+ make_err_msg("you need to specify both source_dir and dest_dir");
+ goto out;
+ }
+ ret = check_config();
+ if (ret < 0)
+ goto out;
+ if (override) {
+ /* don't change daemon mode on SIGHUP */
+ conf.daemon_given = old_daemon_given;
+ close_log(logfile);
+ logfile = NULL;
+ if (conf.logfile_given)
+ free(old_logfile_arg);
+ else if (conf.daemon_given) { /* re-use old logfile */
+ conf.logfile_arg = old_logfile_arg;
+ conf.logfile_given = 1;
+ }
+ }
+ if (conf.logfile_given) {
+ logfile = open_log(conf.logfile_arg);
+ log_welcome(conf.loglevel_arg);
+ }
+ ret = dss_chdir(conf.dest_dir_arg);
+out:
+ free(config_file);
+ if (ret >= 0)
+ return;
+ log_err_msg(EMERG, -ret);
+ exit(EXIT_FAILURE);
+}
+
+void handle_sighup(void)
{
- DSS_INFO_LOG("FIXME: no sighup handling yet\n");
+ DSS_NOTICE_LOG("SIGHUP\n");
+ parse_config_file(1);
}
int rename_incomplete_snapshot(int64_t start)
return ret;
}
-
int handle_rsync_exit(int status)
{
int es, ret;
return ret;
}
-
int get_newest_complete(const char *dirname, void *private)
{
struct edge_snapshot_data *esd = private;
tv_add(&now, &tmp, &next_snapshot_time);
}
-void handle_signal(struct snapshot_list *sl)
+void handle_signal(void)
{
int sig, ret = next_signal();
exit(EXIT_FAILURE);
case SIGHUP:
handle_sighup();
+ ret = 1;
break;
case SIGCHLD:
ret = reap_child(&pid, &status);
ret = handle_rsync_exit(status);
else
ret = handle_rm_exit(status);
- free_snapshot_list(sl);
- get_snapshot_list(sl);
- compute_next_snapshot_time(sl);
}
out:
if (ret < 0)
struct timeval tv = {.tv_sec = 0, .tv_usec = 0};
struct snapshot_list sl = {.num_snapshots = 0};
- get_snapshot_list(&sl);
- compute_next_snapshot_time(&sl);
for (;;) {
struct timeval now, *tvp = &tv;
fd_set rfds;
int low_disk_space;
char **rsync_argv;
+ free_snapshot_list(&sl);
+ get_snapshot_list(&sl);
+ compute_next_snapshot_time(&sl);
FD_ZERO(&rfds);
FD_SET(signal_pipe, &rfds);
if (rsync_pid)
ret = dss_select(signal_pipe + 1, &rfds, NULL, tvp);
if (ret < 0)
return ret;
- if (FD_ISSET(signal_pipe, &rfds))
- handle_signal(&sl);
+ if (FD_ISSET(signal_pipe, &rfds)) {
+ handle_signal();
+ continue;
+ }
if (rm_pid)
continue;
ret = disk_space_low();
return 1;
}
-/* TODO: Unlink pid file */
__noreturn void clean_exit(int status)
{
- //kill(0, SIGTERM);
free(dss_error_txt);
exit(status);
}
-
-int read_config_file(void)
-{
- int ret;
- char *config_file;
- struct stat statbuf;
-
- if (conf.config_file_given)
- config_file = dss_strdup(conf.config_file_arg);
- else {
- char *home = get_homedir();
- config_file = make_message("%s/.dssrc", home);
- free(home);
- }
- ret = stat(config_file, &statbuf);
- if (ret && conf.config_file_given) {
- ret = -ERRNO_TO_DSS_ERROR(errno);
- make_err_msg("failed to stat config file %s", config_file);
- goto out;
- }
- if (!ret) {
- struct cmdline_parser_params params = {
- .override = 0,
- .initialize = 0,
- .check_required = 0,
- .check_ambiguity = 0
- };
- cmdline_parser_config_file(config_file, &conf, ¶ms);
- }
- if (!conf.source_dir_given || !conf.dest_dir_given) {
- ret = -E_SYNTAX;
- make_err_msg("you need to specify both source_dir and dest_dir");
- goto out;
- }
- ret = 1;
-out:
- free(config_file);
- return ret;
-}
-
-int check_config(void)
-{
- if (conf.unit_interval_arg <= 0) {
- make_err_msg("bad unit interval: %i", conf.unit_interval_arg);
- return -E_INVALID_NUMBER;
- }
- DSS_DEBUG_LOG("unit interval: %i day(s)\n", conf.unit_interval_arg);
- if (conf.num_intervals_arg <= 0) {
- make_err_msg("bad number of intervals %i", conf.num_intervals_arg);
- return -E_INVALID_NUMBER;
- }
- DSS_DEBUG_LOG("number of intervals: %i\n", conf.num_intervals_arg);
- return 1;
-}
-
static void setup_signal_handling(void)
{
int ret;
exit(EXIT_FAILURE);
}
-
int main(int argc, char **argv)
{
int ret;
cmdline_parser(argc, argv, &conf); /* aborts on errors */
- ret = read_config_file();
- if (ret < 0)
- goto out;
- ret = check_config();
- if (ret < 0)
- goto out;
- if (conf.logfile_given) {
- logfile = open_log(conf.logfile_arg);
- log_welcome(conf.loglevel_arg);
- }
- ret = dss_chdir(conf.dest_dir_arg);
- if (ret < 0)
- goto out;
+ parse_config_file(0);
if (conf.daemon_given)
daemon_init();
setup_signal_handling();
ret = call_command_handler();
-out:
if (ret < 0)
log_err_msg(EMERG, -ret);
clean_exit(ret >= 0? EXIT_SUCCESS : EXIT_FAILURE);
projects / dss.git / blobdiff