+/*
+ * Copyright (C) 2008 Andre Noll <maan@systemlinux.org>
+ *
+ * Licensed under the GPL v2. For licencing details see COPYING.
+ */
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>
{
COMMANDS
DSS_EMERG_LOG("BUG: did not find command handler\n");
- exit(EXIT_FAILURE);
+ return -E_BUG;
}
#undef COMMAND
#undef COMMANDS
va_end(argp);
}
-/* TODO: Also consider number of inodes. */
static int disk_space_low(void)
{
struct disk_space ds;
struct snapshot *s;
unsigned missing = 0;
- DSS_INFO_LOG("looking for intervals containing too many snapshots\n");
+ DSS_DEBUG_LOG("looking for intervals containing too many snapshots\n");
for (interval = conf.num_intervals_arg - 1; interval >= 0; interval--) {
unsigned keep = desired_number_of_snapshots(interval, conf.num_intervals_arg);
unsigned num = sl->interval_count[interval];
int i, ret;
struct snapshot *s;
- DSS_INFO_LOG("looking for snapshots belonging to intervals greater than %d\n",
+ DSS_DEBUG_LOG("looking for snapshots belonging to intervals greater than %d\n",
conf.num_intervals_arg);
FOR_EACH_SNAPSHOT(s, i, sl) {
if (s->interval <= conf.num_intervals_arg)
int ret;
struct snapshot_list sl;
+ if (!low_disk_space && conf.keep_redundant_given)
+ return 0;
dss_get_snapshot_list(&sl);
ret = remove_outdated_snapshot(&sl);
if (ret) /* error, or we are removing something */
if (ret)
goto out;
DSS_CRIT_LOG("uhuhu: not enough disk space for a single snapshot\n");
- ret= -ENOSPC;
+ ret = -ERRNO_TO_DSS_ERROR(ENOSPC);
out:
free_snapshot_list(&sl);
return ret;
return 1;
}
DSS_EMERG_LOG("BUG: unknown process %d died\n", (int)pid);
- exit(EXIT_FAILURE);
+ return -E_BUG;
}
static int check_config(void)
return 1;
}
-/* exits on errors */
-static void parse_config_file(int override)
+static int parse_config_file(int override)
{
int ret;
char *config_file;
logfile = open_log(conf.logfile_arg);
log_welcome(conf.loglevel_arg);
}
- DSS_EMERG_LOG("loglevel: %d\n", conf.loglevel_arg);
+ DSS_DEBUG_LOG("loglevel: %d\n", conf.loglevel_arg);
// cmdline_parser_dump(logfile? logfile : stdout, &conf);
out:
free(config_file);
- if (ret >= 0)
- return;
- DSS_EMERG_LOG("%s\n", dss_strerror(-ret));
- exit(EXIT_FAILURE);
+ if (ret < 0)
+ DSS_EMERG_LOG("%s\n", dss_strerror(-ret));
+ return ret;
}
-static void change_to_dest_dir(void)
+static int change_to_dest_dir(void)
{
- int ret;
-
DSS_INFO_LOG("changing cwd to %s\n", conf.dest_dir_arg);
- ret = dss_chdir(conf.dest_dir_arg);
- if (ret >= 0)
- return;
- DSS_EMERG_LOG("%s\n", dss_strerror(-ret));
- exit(EXIT_FAILURE);
+ return dss_chdir(conf.dest_dir_arg);
}
-static void handle_sighup(void)
+static int handle_sighup(void)
{
+ int ret;
+
DSS_NOTICE_LOG("SIGHUP\n");
- parse_config_file(1);
- change_to_dest_dir();
+ ret = parse_config_file(1);
+ if (ret < 0)
+ return ret;
+ return change_to_dest_dir();
}
-static void handle_signal(void)
+static int handle_signal(void)
{
int sig, ret = next_signal();
restart_rsync_process();
kill_process(rsync_pid);
kill_process(rm_pid);
- exit(EXIT_FAILURE);
+ ret = -E_SIGNAL;
+ break;
case SIGHUP:
- handle_sighup();
- ret = 1;
+ ret = handle_sighup();
break;
case SIGCHLD:
ret = handle_sigchld();
out:
if (ret < 0)
DSS_ERROR_LOG("%s\n", dss_strerror(-ret));
+ return ret;
}
static void create_rsync_argv(char ***argv, int64_t *num)
DSS_DEBUG_LOG("tvp: %p, tv_sec : %lu\n", tvp, (long unsigned) tv.tv_sec);
ret = dss_select(signal_pipe + 1, &rfds, NULL, tvp);
if (ret < 0)
- return ret;
- if (FD_ISSET(signal_pipe, &rfds))
- handle_signal();
+ goto out;
+ if (FD_ISSET(signal_pipe, &rfds)) {
+ ret = handle_signal();
+ if (ret < 0)
+ goto out;
+ }
if (rm_pid)
continue;
ret = disk_space_low();
if (ret < 0)
- break;
+ goto out;
low_disk_space = ret;
ret = try_to_free_disk_space(low_disk_space);
if (ret < 0)
- break;
+ goto out;
if (rm_pid) {
stop_rsync_process();
continue;
return ret;
}
+static void exit_hook(int exit_code)
+{
+ int fds[3] = {0, 0, 0};
+ char *cmd;
+ pid_t pid;
+
+ if (!conf.exit_hook_given)
+ return;
+ cmd = make_message("%s %s", conf.exit_hook_arg,
+ dss_strerror(-exit_code));
+ DSS_NOTICE_LOG("executing %s\n", cmd);
+ dss_exec_cmdline_pid(&pid, cmd, fds);
+ free(cmd);
+}
+
static int com_run(void)
{
int ret;
if (ret < 0)
return ret;
compute_next_snapshot_time();
- return select_loop();
+ ret = select_loop();
+ if (ret >= 0) /* impossible */
+ ret = -E_BUG;
+ exit_hook(ret);
+ return ret;
}
static int com_prune(void)
return 1;
}
-static void setup_signal_handling(void)
+static int setup_signal_handling(void)
{
int ret;
signal_pipe = signal_init(); /* always successful */
ret = install_sighandler(SIGINT);
if (ret < 0)
- goto err;
+ return ret;
ret = install_sighandler(SIGTERM);
if (ret < 0)
- goto err;
- ret = install_sighandler(SIGCHLD);
- if (ret < 0)
- goto err;
- return;
-err:
- DSS_EMERG_LOG("could not install signal handlers\n");
- exit(EXIT_FAILURE);
+ return ret;
+ return install_sighandler(SIGCHLD);
}
/**
};
cmdline_parser_ext(argc, argv, &conf, ¶ms); /* aborts on errors */
- parse_config_file(0);
-
+ ret = parse_config_file(0);
+ if (ret < 0)
+ goto out;
if (conf.daemon_given)
daemon_init();
- change_to_dest_dir();
- setup_signal_handling();
+ ret = change_to_dest_dir();
+ if (ret < 0)
+ goto out;
+ ret = setup_signal_handling();
+ if (ret < 0)
+ goto out;
ret = call_command_handler();
+out:
if (ret < 0)
DSS_EMERG_LOG("%s\n", dss_strerror(-ret));
exit(ret >= 0? EXIT_SUCCESS : EXIT_FAILURE);
projects / dss.git / blobdiff