-/*
- * Copyright (C) 2008-2011 Andre Noll <maan@tuebingen.mpg.de>
- *
- * Licensed under the GPL v2. For licencing details see COPYING.
- */
+/* SPDX-License-Identifier: GPL-2.0 */
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
/** Parsed subcommand options. */
static struct lls_parse_result *cmdline_sublpr, *sublpr;
+/* The executing subcommand (NULL at startup). */
+static const struct lls_command *subcmd;
/** Wether daemon_init() was called. */
static bool daemonized;
/** Non-NULL if we log to a file. */
fprintf(log, "\n*** internal state ***\n\n");
fprintf(log,
"pid: %d\n"
- "logile: %s\n"
+ "logfile: %s\n"
"snapshot_currently_being_removed: %s\n"
"path_to_last_complete_snapshot: %s\n"
"reference_snapshot: %s\n"
if (loglevel < lpr_ll)
return;
outfd = logfile? logfile : stderr;
- time(&t1);
- tm = localtime(&t1);
- strftime(str, sizeof(str), "%b %d %H:%M:%S", tm);
- fprintf(outfd, "%s ", str);
- if (lpr_ll <= INFO)
- fprintf(outfd, "%i: ", loglevel);
+ if (subcmd == CMD_PTR(RUN)) {
+ time(&t1);
+ tm = localtime(&t1);
+ strftime(str, sizeof(str), "%b %d %H:%M:%S", tm);
+ fprintf(outfd, "%s ", str);
+ if (lpr_ll <= INFO)
+ fprintf(outfd, "%i: ", loglevel);
+ }
+ if (subcmd == CMD_PTR(RUN))
#ifdef DSS_NO_FUNC_NAMES
- fprintf(outfd, "%s:%d: ", location_file, location_line);
+ fprintf(outfd, "%s:%d: ", location_file, location_line);
#else
- fprintf(outfd, "%s: ", location_func);
+ fprintf(outfd, "%s: ", location_func);
#endif
va_start(argp, fmt);
vfprintf(outfd, fmt, argp);
return config_file;
}
-static int send_signal(int sig)
+static int send_signal(int sig, bool wait)
{
pid_t pid;
char *config_file = get_config_file_name();
int ret = get_dss_pid(config_file, &pid);
+ unsigned ms = 32;
+ struct timespec ts;
free(config_file);
if (ret < 0)
dss_msg("%d\n", (int)pid);
return 0;
}
+ DSS_NOTICE_LOG(("sending signal %d to pid %d\n", sig, (int)pid));
ret = kill(pid, sig);
if (ret < 0)
return -ERRNO_TO_DSS_ERROR(errno);
- return 1;
+ if (!wait)
+ return 1;
+ while (ms < 5000) {
+ ts.tv_sec = ms / 1000;
+ ts.tv_nsec = (ms % 1000) * 1000 * 1000;
+ ret = nanosleep(&ts, NULL);
+ if (ret < 0)
+ return -ERRNO_TO_DSS_ERROR(errno);
+ ret = kill(pid, 0);
+ if (ret < 0) {
+ if (errno != ESRCH)
+ return -ERRNO_TO_DSS_ERROR(errno);
+ return 1;
+ }
+ ms *= 2;
+ }
+ return -E_KILL_TIMEOUT;
}
struct signal_info {
static int com_kill(void)
{
+ bool w_given = OPT_GIVEN(KILL, WAIT);
const char *arg = OPT_STRING_VAL(KILL, SIGNAL);
int ret, i;
return ret;
if (val < 0 || val > SIGRTMAX)
return -ERRNO_TO_DSS_ERROR(EINVAL);
- return send_signal(val);
+ return send_signal(val, w_given);
}
if (strncasecmp(arg, "sig", 3) == 0)
arg += 3;
if (strcasecmp(arg, "CLD") == 0)
- return send_signal(SIGCHLD);
+ return send_signal(SIGCHLD, w_given);
if (strcasecmp(arg, "IOT") == 0)
- return send_signal(SIGABRT);
+ return send_signal(SIGABRT, w_given);
for (i = 0; i < SIGNAL_TABLE_SIZE; i++)
if (strcasecmp(arg, signal_table[i].name) == 0)
- return send_signal(signal_table[i].num);
+ return send_signal(signal_table[i].num, w_given);
DSS_ERROR_LOG(("invalid sigspec: %s\n", arg));
return -ERRNO_TO_DSS_ERROR(EINVAL);
}
static int64_t compute_next_snapshot_time(void)
{
int64_t x = 0, now = get_current_time(), unit_interval
- = 24 * 3600 * OPT_UINT32_VAL(DSS, UNIT_INTERVAL), ret;
+ = 24 * 3600 * OPT_UINT32_VAL(DSS, UNIT_INTERVAL), ret,
+ last_completion_time;
unsigned wanted = desired_number_of_snapshots(0,
OPT_UINT32_VAL(DSS, NUM_INTERVALS)),
num_complete = 0;
continue;
num_complete++;
x += s->completion_time - s->creation_time;
+ last_completion_time = s->completion_time;
}
assert(x >= 0);
x /= num_complete; /* avg time to create one snapshot */
if (unit_interval < x * wanted) /* oops, no sleep at all */
goto out;
- ret = s->completion_time + unit_interval / wanted - x;
+ ret = last_completion_time + unit_interval / wanted - x;
out:
free_snapshot_list(&sl);
return ret;
struct snapshot *s;
int i;
- DSS_DEBUG_LOG(("looking for orphaned snapshots\n"));
+ DSS_DEBUG_LOG(("looking for old incomplete snapshots\n"));
FOR_EACH_SNAPSHOT(s, i, sl) {
if (snapshot_is_being_created(s))
continue;
if (!low_disk_space)
goto out;
DSS_WARNING_LOG(("disk space low and nothing obvious to remove\n"));
+ why = "oldest";
victim = find_oldest_removable_snapshot(&sl);
if (victim)
goto remove;
return -E_BUG;
}
+/* also checks if . is a mountpoint, if --mountpoint was given */
static int change_to_dest_dir(void)
{
+ int ret;
const char *dd = OPT_STRING_VAL(DSS, DEST_DIR);
+ struct stat dot, dotdot;
+
DSS_INFO_LOG(("changing cwd to %s\n", dd));
- return dss_chdir(dd);
+ if (chdir(dd) < 0) {
+ ret = -ERRNO_TO_DSS_ERROR(errno);
+ DSS_ERROR_LOG(("could not change cwd to %s\n", dd));
+ return ret;
+ }
+ if (!OPT_GIVEN(DSS, MOUNTPOINT))
+ return 0;
+ if (stat(".", &dot) < 0) {
+ ret = -ERRNO_TO_DSS_ERROR(errno);
+ DSS_ERROR_LOG(("could not stat .\n"));
+ return ret;
+ }
+ if (stat("..", &dotdot) < 0) {
+ ret = -ERRNO_TO_DSS_ERROR(errno);
+ DSS_ERROR_LOG(("could not stat ..\n"));
+ return ret;
+ }
+ if (dot.st_dev == dotdot.st_dev && dot.st_ino != dotdot.st_ino) {
+ DSS_ERROR_LOG(("mountpoint check failed for %s\n", dd));
+ return -E_MOUNTPOINT;
+ }
+ return 1;
}
-static int check_config(const struct lls_command *cmd)
+static int check_config(void)
{
int ret;
uint32_t unit_interval = OPT_UINT32_VAL(DSS, UNIT_INTERVAL);
DSS_ERROR_LOG(("bad number of intervals: %i\n", num_intervals));
return -E_INVALID_NUMBER;
}
- if (cmd == CMD_PTR(RUN) || cmd == CMD_PTR(CREATE))
+ if (subcmd == CMD_PTR(RUN) || subcmd == CMD_PTR(CREATE))
if (!OPT_GIVEN(DSS, SOURCE_DIR)) {
DSS_ERROR_LOG(("--source-dir required\n"));
return -E_SYNTAX;
}
- if (cmd == CMD_PTR(RUN) || cmd == CMD_PTR(CREATE)
- || cmd == CMD_PTR(LS) || cmd == CMD_PTR(PRUNE)) {
+ if (subcmd == CMD_PTR(RUN) || subcmd == CMD_PTR(CREATE)
+ || subcmd == CMD_PTR(LS) || subcmd == CMD_PTR(PRUNE)) {
if (!OPT_GIVEN(DSS, DEST_DIR)) {
DSS_ERROR_LOG(("--dest-dir required\n"));
return -E_SYNTAX;
ret = parse_config_file(true /* SIGHUP */, CMD_PTR(RUN));
if (ret < 0)
return ret;
- ret = check_config(CMD_PTR(RUN));
+ ret = check_config();
if (ret < 0)
return ret;
close_log(logfile);
switch (sig) {
case SIGINT:
case SIGTERM:
- kill_children();
- ret = -E_SIGNAL;
- break;
+ return -E_SIGNAL;
case SIGHUP:
ret = handle_sighup();
break;
char *logname;
int i = 0, j, N = OPT_GIVEN(DSS, RSYNC_OPTION);
struct snapshot_list sl;
+ static bool seeded;
dss_get_snapshot_list(&sl);
assert(!name_of_reference_snapshot);
(*argv)[i++] = dss_strdup("rsync");
(*argv)[i++] = dss_strdup("-a");
(*argv)[i++] = dss_strdup("--delete");
+ if (!seeded) {
+ srandom((unsigned)time(NULL)); /* no need to be fancy here */
+ seeded = true;
+ }
+ if (1000 * (random() / (RAND_MAX + 1.0)) < OPT_UINT32_VAL(DSS, CHECKSUM)) {
+ DSS_NOTICE_LOG(("adding --checksum to rsync options\n"));
+ (*argv)[i++] = dss_strdup("--checksum");
+ }
for (j = 0; j < N; j++)
(*argv)[i++] = dss_strdup(lls_string_val(j,
OPT_RESULT(DSS, RSYNC_OPTION)));
{
int ret;
+ assert(argv);
ret = rename_resume_snap(current_snapshot_creation_time);
if (ret < 0)
return ret;
static void exit_hook(int exit_code)
{
- const char *argv[3];
pid_t pid;
-
- argv[0] = OPT_STRING_VAL(DSS, EXIT_HOOK);
- argv[1] = dss_strerror(-exit_code);
- argv[2] = NULL;
-
- DSS_NOTICE_LOG(("executing %s %s\n", argv[0], argv[1]));
- dss_exec(&pid, argv[0], (char **)argv);
+ char **argv, *tmp = dss_strdup(OPT_STRING_VAL(DSS, EXIT_HOOK));
+ unsigned n = split_args(tmp, &argv, " \t");
+
+ n++;
+ argv = dss_realloc(argv, (n + 1) * sizeof(char *));
+ argv[n - 1] = dss_strdup(dss_strerror(-exit_code));
+ argv[n] = NULL;
+ dss_exec(&pid, argv[0], argv);
+ free(argv[n - 1]);
+ free(argv);
+ free(tmp);
}
static void lock_dss_or_die(void)
static int com_run(void)
{
int ret, fd = -1;
+ char *config_file;
+ pid_t pid;
if (OPT_GIVEN(DSS, DRY_RUN)) {
DSS_ERROR_LOG(("dry run not supported by this command\n"));
return -E_SYNTAX;
}
+ config_file = get_config_file_name();
+ ret = get_dss_pid(config_file, &pid);
+ free(config_file);
+ if (ret >= 0) {
+ DSS_ERROR_LOG(("pid %d\n", (int)pid));
+ return -E_ALREADY_RUNNING;
+ }
if (OPT_GIVEN(RUN, DAEMON)) {
fd = daemon_init();
daemonized = true;
ret = -E_BUG;
kill_children();
exit_hook(ret);
+ while (wait(NULL) >= 0 || errno != ECHILD)
+ ; /* still have children to wait for */
return ret;
}
EXPORT_CMD_HANDLER(run);
int i;
struct snapshot_list sl;
struct snapshot *s;
+ int64_t now = get_current_time();
dss_get_snapshot_list(&sl);
FOR_EACH_SNAPSHOT(s, i, &sl) {
- int64_t d = 0;
+ int64_t d;
if (s->flags & SS_COMPLETE)
d = (s->completion_time - s->creation_time) / 60;
- dss_msg("%u\t%s\t%3" PRId64 ":%02" PRId64 "\n", s->interval, s->name, d/60, d%60);
+ else
+ d = (now - s->creation_time) / 60;
+ dss_msg("%u\t%s\t%3" PRId64 ":%02" PRId64 "\n", s->interval,
+ s->name, d / 60, d % 60);
}
free_snapshot_list(&sl);
return 1;
}
EXPORT_CMD_HANDLER(ls);
+static int com_configtest(void)
+{
+ printf("Syntax Ok\n");
+ return 0;
+}
+EXPORT_CMD_HANDLER(configtest);
+
static int setup_signal_handling(void)
{
int ret;
else if (OPT_GIVEN(DSS, HELP))
txt = lls_short_help(CMD_PTR(DSS));
else if (OPT_GIVEN(DSS, VERSION))
- txt = dss_strdup(VERSION_STRING);
+ txt = make_message("%s\n", VERSION_STRING);
else
return;
printf("%s", txt);
for (i = 1; (cmd = lls_cmd(i, dss_suite)); i++) {
const char *name = lls_command_name(cmd);
const char *purpose = lls_purpose(cmd);
- printf("%-10s%s\n", name, purpose);
+ printf("%-11s%s\n", name, purpose);
}
exit(EXIT_SUCCESS);
}
int main(int argc, char **argv)
{
int ret;
- const struct lls_command *cmd = CMD_PTR(DSS);
char *errctx = NULL;
unsigned num_inputs;
- const struct dss_user_data *ud = NULL;
+ const struct dss_user_data *ud;
- ret = lls_parse(argc, argv, cmd, &cmdline_lpr, &errctx);
+ ret = lls_parse(argc, argv, CMD_PTR(DSS), &cmdline_lpr, &errctx);
if (ret < 0) {
ret = lopsub_error(ret, &errctx);
goto out;
}
lpr = cmdline_lpr;
- ret = parse_config_file(false /* no SIGHUP */, cmd);
+ ret = parse_config_file(false /* no SIGHUP */, CMD_PTR(DSS));
if (ret < 0)
goto out;
handle_version_and_help();
ret = lopsub_error(ret, &errctx);
goto out;
}
- cmd = lls_cmd(ret, dss_suite);
- ret = lls_parse(num_inputs, argv + argc - num_inputs, cmd,
+ subcmd = lls_cmd(ret, dss_suite);
+ ret = lls_parse(num_inputs, argv + argc - num_inputs, subcmd,
&cmdline_sublpr, &errctx);
if (ret < 0) {
ret = lopsub_error(ret, &errctx);
goto out;
}
sublpr = cmdline_sublpr;
- ret = parse_config_file(false /* no SIGHUP */, cmd);
+ ret = parse_config_file(false /* no SIGHUP */, subcmd);
if (ret < 0)
goto out;
- ret = check_config(cmd);
+ ret = check_config();
if (ret < 0)
goto out;
ret = setup_signal_handling();
if (ret < 0)
goto out;
- ud = lls_user_data(cmd);
+ ud = lls_user_data(subcmd);
ret = ud->handler();
signal_shutdown();
out:
lls_free_parse_result(lpr, CMD_PTR(DSS));
if (lpr != cmdline_lpr)
lls_free_parse_result(cmdline_lpr, CMD_PTR(DSS));
- lls_free_parse_result(sublpr, cmd);
+ lls_free_parse_result(sublpr, subcmd);
if (sublpr != cmdline_sublpr)
- lls_free_parse_result(cmdline_sublpr, cmd);
+ lls_free_parse_result(cmdline_sublpr, subcmd);
exit(ret >= 0? EXIT_SUCCESS : EXIT_FAILURE);
}
projects / dss.git / blobdiff