/*
* ZFS Event Daemon (ZED).
*/
int
main(int argc, char *argv[])
{
struct zed_conf *zcp;
uint64_t saved_eid;
int64_t saved_etime[2];
zed_log_init(argv[0]);
zed_log_stderr_open(LOG_NOTICE);
zcp = zed_conf_create();
zed_conf_parse_opts(zcp, argc, argv);
if (zcp->do_verbose)
zed_log_stderr_open(LOG_INFO);
if (geteuid() != 0)
zed_log_die("Must be run as root");
(void) umask(0);
_setup_sig_handlers();
zed_conf_parse_file(zcp);
zed_file_close_from(STDERR_FILENO + 1);
if (chdir("/") < 0)
zed_log_die("Failed to change to root directory");
if (zed_conf_scan_dir(zcp) < 0)
exit(EXIT_FAILURE);
if (zcp->do_memlock)
_lock_memory();
if (!zcp->do_foreground) {
_become_daemon();
zed_log_syslog_open(LOG_DAEMON);
zed_log_stderr_close();
}
zed_log_msg(LOG_NOTICE,
"ZFS Event Daemon %s-%s", ZFS_META_VERSION, ZFS_META_RELEASE);
(void) zed_conf_write_pid(zcp);
if (zed_conf_open_state(zcp) < 0)
exit(EXIT_FAILURE);
if (zed_conf_read_state(zcp, &saved_eid, saved_etime) < 0)
exit(EXIT_FAILURE);
zed_event_init(zcp);
zed_event_seek(zcp, saved_eid, saved_etime);
while (!_got_exit) {
if (_got_hup) {
_got_hup = 0;
(void) zed_conf_scan_dir(zcp);
}
zed_event_service(zcp);
}
zed_log_msg(LOG_NOTICE, "Exiting");
zed_event_fini(zcp);
zed_conf_destroy(zcp);
zed_log_fini();
exit(EXIT_SUCCESS);
}
/*
* ZFS Event Daemon (ZED).
*/
int
main(int argc, char *argv[])
{
struct zed_conf *zcp;
uint64_t saved_eid;
int64_t saved_etime[2];
zed_log_init(argv[0]);
zed_log_stderr_open(LOG_NOTICE);
zcp = zed_conf_create();
zed_conf_parse_opts(zcp, argc, argv);
if (zcp->do_verbose)
zed_log_stderr_open(LOG_INFO);
if (geteuid() != 0)
zed_log_die("Must be run as root");
(void) umask(0);
_setup_sig_handlers();
zed_conf_parse_file(zcp);
zed_file_close_from(STDERR_FILENO + 1);
if (chdir("/") < 0)
zed_log_die("Failed to change to root directory");
if (zed_conf_scan_dir(zcp) < 0)
exit(EXIT_FAILURE);
if (zcp->do_memlock)
_lock_memory();
if (!zcp->do_foreground) {
_become_daemon();
zed_log_syslog_open(LOG_DAEMON);
zed_log_stderr_close();
}
zed_log_msg(LOG_NOTICE,
"ZFS Event Daemon %s-%s", ZFS_META_VERSION, ZFS_META_RELEASE);
(void) zed_conf_write_pid(zcp);
if (zed_conf_open_state(zcp) < 0)
exit(EXIT_FAILURE);
if (zed_conf_read_state(zcp, &saved_eid, saved_etime) < 0)
exit(EXIT_FAILURE);
retry:
if (zed_event_init(zcp)) {
/*
* If we failed to open /dev/zfs, but force was requested, we
* sleep waiting for it to come alive. This lets zed sit around
* waiting for the kernel module to load.
*/
if (zcp->do_force) {
sleep(30);
if (!_got_exit) goto retry;
}
zed_log_die("Failed to initialize libzfs");
}
zed_event_seek(zcp, saved_eid, saved_etime);
while (!_got_exit) {
if (_got_hup) {
_got_hup = 0;
(void) zed_conf_scan_dir(zcp);
}
if (zed_event_service(zcp)) break;
}
zed_log_msg(LOG_NOTICE, "Exiting");
zed_event_fini(zcp);
if (zcp->do_force && !_got_exit) {
goto retry;
}
zed_conf_destroy(zcp);
zed_log_fini();
exit(EXIT_SUCCESS);
}
/*
* Fork a child process to handle event [eid]. The program [prog]
* in directory [dir] is executed with the envionment [env].
*
* The file descriptor [zfd] is the zevent_fd used to track the
* current cursor location within the zevent nvlist.
*/
static void
_zed_exec_fork_child(uint64_t eid, const char *dir, const char *prog,
char *env[], int zfd)
{
char path[PATH_MAX];
int n;
pid_t pid;
int fd;
pid_t wpid;
int status;
assert(dir != NULL);
assert(prog != NULL);
assert(env != NULL);
assert(zfd >= 0);
n = snprintf(path, sizeof (path), "%s/%s", dir, prog);
if ((n < 0) || (n >= sizeof (path))) {
zed_log_msg(LOG_WARNING,
"Failed to fork \"%s\" for eid=%llu: %s",
prog, eid, strerror(ENAMETOOLONG));
return;
}
pid = fork();
if (pid < 0) {
zed_log_msg(LOG_WARNING,
"Failed to fork \"%s\" for eid=%llu: %s",
prog, eid, strerror(errno));
return;
} else if (pid == 0) {
(void) umask(022);
if ((fd = open("/dev/null", O_RDWR)) != -1) {
(void) dup2(fd, STDIN_FILENO);
(void) dup2(fd, STDOUT_FILENO);
(void) dup2(fd, STDERR_FILENO);
}
(void) dup2(zfd, ZEVENT_FILENO);
zed_file_close_from(ZEVENT_FILENO + 1);
execle(path, prog, NULL, env);
_exit(127);
} else {
zed_log_msg(LOG_INFO, "Invoking \"%s\" eid=%llu pid=%d",
prog, eid, pid);
/* FIXME: Timeout rogue child processes with sigalarm? */
restart:
wpid = waitpid(pid, &status, 0);
if (wpid == (pid_t) -1) {
if (errno == EINTR)
goto restart;
zed_log_msg(LOG_WARNING,
"Failed to wait for \"%s\" eid=%llu pid=%d",
prog, eid, pid);
} else if (WIFEXITED(status)) {
zed_log_msg(LOG_INFO,
"Finished \"%s\" eid=%llu pid=%d exit=%d",
prog, eid, pid, WEXITSTATUS(status));
} else if (WIFSIGNALED(status)) {
zed_log_msg(LOG_INFO,
"Finished \"%s\" eid=%llu pid=%d sig=%d/%s",
prog, eid, pid, WTERMSIG(status),
strsignal(WTERMSIG(status)));
} else {
zed_log_msg(LOG_INFO,
"Finished \"%s\" eid=%llu pid=%d status=0x%X",
prog, eid, (unsigned int) status);
}
}
}
