#include "macro.h"
#include "util.h"
#include "sd-daemon.h"
+#include "utmp-wtmp.h"
static int read_packet(int fd, struct shutdownd_command *_c) {
struct msghdr msghdr;
return 0;
}
+ char_array_0(c.wall_message);
+
*_c = c;
return 1;
}
+static void warn_wall(usec_t n, struct shutdownd_command *c) {
+
+ assert(c);
+ assert(c->warn_wall);
+
+ if (n >= c->elapse)
+ return;
+
+ if (c->wall_message[0])
+ utmp_wall(c->wall_message);
+ else {
+ char date[FORMAT_TIMESTAMP_MAX];
+ const char* prefix;
+ char *l = NULL;
+
+ if (c->mode == 'H')
+ prefix = "The system is going down for system halt at ";
+ else if (c->mode == 'P')
+ prefix = "The system is going down for power-off at ";
+ else if (c->mode == 'r')
+ prefix = "The system is going down for reboot at ";
+ else
+ assert_not_reached("Unknown mode!");
+
+ if (asprintf(&l, "%s%s!", prefix, format_timestamp(date, sizeof(date), c->elapse)) < 0)
+ log_error("Failed to allocate wall message");
+ else {
+ utmp_wall(l);
+ free(l);
+ }
+ }
+}
+
+static usec_t when_wall(usec_t n, usec_t elapse) {
+
+ static const struct {
+ usec_t delay;
+ usec_t interval;
+ } table[] = {
+ { 10 * USEC_PER_MINUTE, USEC_PER_MINUTE },
+ { USEC_PER_HOUR, 15 * USEC_PER_MINUTE },
+ { 3 * USEC_PER_HOUR, 30 * USEC_PER_MINUTE }
+ };
+
+ usec_t left, sub;
+ unsigned i;
+
+ /* If the time is already passed, then don't announce */
+ if (n >= elapse)
+ return 0;
+
+ left = elapse - n;
+ for (i = 0; i < ELEMENTSOF(table); i++)
+ if (n + table[i].delay >= elapse) {
+ sub = ((left / table[i].interval) * table[i].interval);
+ break;
+ }
+
+ if (i >= ELEMENTSOF(table))
+ sub = ((left / USEC_PER_HOUR) * USEC_PER_HOUR);
+
+ return elapse > sub ? elapse - sub : 1;
+}
+
+static usec_t when_nologin(usec_t elapse) {
+ return elapse > 5*USEC_PER_MINUTE ? elapse - 5*USEC_PER_MINUTE : 1;
+}
+
int main(int argc, char *argv[]) {
enum {
FD_SOCKET,
- FD_SHUTDOWN_TIMER,
+ FD_WALL_TIMER,
FD_NOLOGIN_TIMER,
+ FD_SHUTDOWN_TIMER,
_FD_MAX
};
- int r = 4, n;
+ int r = EXIT_FAILURE, n_fds;
int one = 1;
- unsigned n_fds = 1;
struct shutdownd_command c;
struct pollfd pollfd[_FD_MAX];
- bool exec_shutdown = false, unlink_nologin = false;
+ bool exec_shutdown = false, unlink_nologin = false, failed = false;
+ unsigned i;
if (getppid() != 1) {
log_error("This program should be invoked by init only.");
- return 1;
+ return EXIT_FAILURE;
}
if (argc > 1) {
log_error("This program does not take arguments.");
- return 1;
+ return EXIT_FAILURE;
}
log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
log_parse_environment();
+ log_open();
- if ((n = sd_listen_fds(true)) < 0) {
+ if ((n_fds = sd_listen_fds(true)) < 0) {
log_error("Failed to read listening file descriptors from environment: %s", strerror(-r));
- return 1;
+ return EXIT_FAILURE;
}
- if (n != 1) {
+ if (n_fds != 1) {
log_error("Need exactly one file descriptor.");
- return 2;
+ return EXIT_FAILURE;
}
if (setsockopt(SD_LISTEN_FDS_START, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one)) < 0) {
log_error("SO_PASSCRED failed: %m");
- return 3;
+ return EXIT_FAILURE;
}
zero(c);
pollfd[FD_SOCKET].fd = SD_LISTEN_FDS_START;
pollfd[FD_SOCKET].events = POLLIN;
- pollfd[FD_SHUTDOWN_TIMER].fd = -1;
- pollfd[FD_SHUTDOWN_TIMER].events = POLLIN;
- pollfd[FD_NOLOGIN_TIMER].fd = -1;
- pollfd[FD_NOLOGIN_TIMER].events = POLLIN;
+
+ for (i = 0; i < _FD_MAX; i++) {
+
+ if (i == FD_SOCKET)
+ continue;
+
+ pollfd[i].events = POLLIN;
+
+ if ((pollfd[i].fd = timerfd_create(CLOCK_REALTIME, TFD_NONBLOCK|TFD_CLOEXEC)) < 0) {
+ log_error("timerfd_create(): %m");
+ failed = false;
+ }
+ }
+
+ if (failed)
+ goto finish;
log_debug("systemd-shutdownd running as pid %lu", (unsigned long) getpid());
do {
int k;
+ usec_t n;
- if (poll(pollfd, n_fds, -1) < 0) {
+ if (poll(pollfd, _FD_MAX, -1) < 0) {
if (errno == EAGAIN || errno == EINTR)
continue;
goto finish;
}
+ n = now(CLOCK_REALTIME);
+
if (pollfd[FD_SOCKET].revents) {
if ((k = read_packet(pollfd[FD_SOCKET].fd, &c)) < 0)
goto finish;
else if (k > 0 && c.elapse > 0) {
struct itimerspec its;
- char buf[27];
-
- if (pollfd[FD_SHUTDOWN_TIMER].fd < 0)
- if ((pollfd[FD_SHUTDOWN_TIMER].fd = timerfd_create(CLOCK_REALTIME, TFD_NONBLOCK|TFD_CLOEXEC)) < 0) {
- log_error("timerfd_create(): %m");
+ char date[FORMAT_TIMESTAMP_MAX];
+
+ if (c.warn_wall) {
+ /* Send wall messages every so often */
+ zero(its);
+ timespec_store(&its.it_value, when_wall(n, c.elapse));
+ if (timerfd_settime(pollfd[FD_WALL_TIMER].fd, TFD_TIMER_ABSTIME, &its, NULL) < 0) {
+ log_error("timerfd_settime(): %m");
goto finish;
}
- if (pollfd[FD_NOLOGIN_TIMER].fd < 0)
- if ((pollfd[FD_NOLOGIN_TIMER].fd = timerfd_create(CLOCK_REALTIME, TFD_NONBLOCK|TFD_CLOEXEC)) < 0) {
- log_error("timerfd_create(): %m");
- goto finish;
- }
+ /* Warn immediately if less than 15 minutes are left */
+ if (n < c.elapse &&
+ n + 15*USEC_PER_MINUTE >= c.elapse)
+ warn_wall(n, &c);
+ }
/* Disallow logins 5 minutes prior to shutdown */
zero(its);
- timespec_store(&its.it_value, c.elapse > 5*USEC_PER_MINUTE ? c.elapse - 5*USEC_PER_MINUTE : 0);
+ timespec_store(&its.it_value, when_nologin(c.elapse));
if (timerfd_settime(pollfd[FD_NOLOGIN_TIMER].fd, TFD_TIMER_ABSTIME, &its, NULL) < 0) {
log_error("timerfd_settime(): %m");
goto finish;
goto finish;
}
- n_fds = 3;
-
- ctime_r(&its.it_value.tv_sec, buf);
-
sd_notifyf(false,
"STATUS=Shutting down at %s...",
- strstrip(buf));
+ format_timestamp(date, sizeof(date), c.elapse));
}
}
- if (pollfd[FD_NOLOGIN_TIMER].fd >= 0 &&
- pollfd[FD_NOLOGIN_TIMER].revents) {
+ if (pollfd[FD_WALL_TIMER].revents) {
+ struct itimerspec its;
+
+ warn_wall(n, &c);
+ flush_fd(pollfd[FD_WALL_TIMER].fd);
+
+ /* Restart timer */
+ zero(its);
+ timespec_store(&its.it_value, when_wall(n, c.elapse));
+ if (timerfd_settime(pollfd[FD_WALL_TIMER].fd, TFD_TIMER_ABSTIME, &its, NULL) < 0) {
+ log_error("timerfd_settime(): %m");
+ goto finish;
+ }
+ }
+
+ if (pollfd[FD_NOLOGIN_TIMER].revents) {
int e;
- if ((e = touch("/etc/nologin")) < 0)
- log_error("Failed to create /etc/nologin: %s", strerror(-e));
+ log_info("Creating /var/run/nologin, blocking further logins...");
+
+ if ((e = write_one_line_file("/var/run/nologin", "System is going down.")) < 0)
+ log_error("Failed to create /var/run/nologin: %s", strerror(-e));
else
unlink_nologin = true;
- /* Disarm nologin timer */
- close_nointr_nofail(pollfd[FD_NOLOGIN_TIMER].fd);
- pollfd[FD_NOLOGIN_TIMER].fd = -1;
- n_fds = 2;
-
+ flush_fd(pollfd[FD_NOLOGIN_TIMER].fd);
}
- if (pollfd[FD_SHUTDOWN_TIMER].fd >= 0 &&
- pollfd[FD_SHUTDOWN_TIMER].revents) {
+ if (pollfd[FD_SHUTDOWN_TIMER].revents) {
exec_shutdown = true;
goto finish;
}
} while (c.elapse > 0);
- r = 0;
+ r = EXIT_SUCCESS;
log_debug("systemd-shutdownd stopped as pid %lu", (unsigned long) getpid());
finish:
- if (pollfd[FD_SOCKET].fd >= 0)
- close_nointr_nofail(pollfd[FD_SOCKET].fd);
- if (pollfd[FD_SHUTDOWN_TIMER].fd >= 0)
- close_nointr_nofail(pollfd[FD_SHUTDOWN_TIMER].fd);
+ for (i = 0; i < _FD_MAX; i++)
+ if (pollfd[i].fd >= 0)
+ close_nointr_nofail(pollfd[i].fd);
- if (pollfd[FD_NOLOGIN_TIMER].fd >= 0)
- close_nointr_nofail(pollfd[FD_NOLOGIN_TIMER].fd);
+ if (unlink_nologin)
+ unlink("/var/run/nologin");
if (exec_shutdown) {
char sw[3];
sw[1] = c.mode;
sw[2] = 0;
- execl(SYSTEMCTL_BINARY_PATH, "shutdown", sw, "now", NULL);
+ execl(SYSTEMCTL_BINARY_PATH,
+ "shutdown",
+ sw,
+ "now",
+ (c.warn_wall && c.wall_message[0]) ? c.wall_message :
+ (c.warn_wall ? NULL : "--no-wall"),
+ NULL);
+
log_error("Failed to execute /sbin/shutdown: %m");
}
- if (unlink_nologin)
- unlink("/etc/nologin");
-
sd_notify(false,
"STATUS=Exiting...");
~ianmdlvl / elogind.git / blobdiff