/* SPDX-License-Identifier: LGPL-2.1+ */
/***
- This file is part of systemd.
-
- Copyright 2017 Felipe Sateler
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
+ Copyright © 2017 Felipe Sateler
***/
#include <errno.h>
#include "bus-util.h"
#include "bus-error.h"
+#include "def.h"
+#include "env-util.h"
#include "log.h"
#include "process-util.h"
#include "sd-bus.h"
#include "signal-util.h"
-static int start_default_target(void) {
+static int reload_manager(sd_bus *bus) {
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
- _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
+ _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
int r;
- r = bus_connect_system_systemd(&bus);
- if (r < 0) {
- log_error_errno(r, "Failed to get D-Bus connection: %m");
- return false;
- }
+ log_info("Reloading system manager configuration");
+
+ r = sd_bus_message_new_method_call(
+ bus,
+ &m,
+ "org.freedesktop.systemd1",
+ "/org/freedesktop/systemd1",
+ "org.freedesktop.systemd1.Manager",
+ "Reload");
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ /* Note we use an extra-long timeout here. This is because a reload or reexec means generators are rerun which
+ * are timed out after DEFAULT_TIMEOUT_USEC. Let's use twice that time here, so that the generators can have
+ * their timeout, and for everything else there's the same time budget in place. */
+
+ r = sd_bus_call(bus, m, DEFAULT_TIMEOUT_USEC * 2, &error, NULL);
+ if (r < 0)
+ return log_error_errno(r, "Failed to reload daemon: %s", bus_error_message(&error, r));
+
+ return 0;
+}
+
+static int start_default_target(sd_bus *bus) {
+ _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
+ int r;
log_info("Starting default target");
"ss", "default.target", "isolate");
if (r < 0)
- log_error("Failed to start default target: %s", bus_error_message(&error, r));
+ return log_error_errno(r, "Failed to start default target: %s", bus_error_message(&error, r));
- return r;
+ return 0;
}
-static void fork_wait(const char* const cmdline[]) {
+static int fork_wait(const char* const cmdline[]) {
pid_t pid;
+ int r;
- pid = fork();
- if (pid < 0) {
- log_error_errno(errno, "fork(): %m");
- return;
- }
- if (pid == 0) {
-
+ r = safe_fork("(sulogin)", FORK_RESET_SIGNALS|FORK_DEATHSIG|FORK_RLIMIT_NOFILE_SAFE|FORK_LOG, &pid);
+ if (r < 0)
+ return r;
+ if (r == 0) {
/* Child */
-
- (void) reset_all_signal_handlers();
- (void) reset_signal_mask();
- assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0);
-
execv(cmdline[0], (char**) cmdline);
log_error_errno(errno, "Failed to execute %s: %m", cmdline[0]);
_exit(EXIT_FAILURE); /* Operational error */
}
- wait_for_terminate_and_warn(cmdline[0], pid, false);
+ return wait_for_terminate_and_check(cmdline[0], pid, WAIT_LOG_ABNORMAL);
}
static void print_mode(const char* mode) {
printf("You are in %s mode. After logging in, type \"journalctl -xb\" to view\n"
- "system logs, \"systemctl reboot\" to reboot, \"systemctl default\" or ^D to boot\n"
- "into default mode.\n", mode);
+ "system logs, \"systemctl reboot\" to reboot, \"systemctl default\" or \"exit\"\n"
+ "to boot into default mode.\n", mode);
fflush(stdout);
}
int main(int argc, char *argv[]) {
- static const char* const sulogin_cmdline[] = {SULOGIN, NULL};
+ const char* sulogin_cmdline[] = {
+ SULOGIN,
+ NULL, /* --force */
+ NULL
+ };
+ _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
int r;
- log_set_target(LOG_TARGET_AUTO);
- log_parse_environment();
- log_open();
+ log_setup_service();
print_mode(argc > 1 ? argv[1] : "");
- fork_wait(sulogin_cmdline);
+ if (getenv_bool("SYSTEMD_SULOGIN_FORCE") > 0)
+ /* allows passwordless logins if root account is locked. */
+ sulogin_cmdline[1] = "--force";
- r = start_default_target();
+ (void) fork_wait(sulogin_cmdline);
+
+ r = bus_connect_system_systemd(&bus);
+ if (r < 0) {
+ log_warning_errno(r, "Failed to get D-Bus connection: %m");
+ r = 0;
+ } else {
+ (void) reload_manager(bus);
+
+ r = start_default_target(bus);
+ }
return r >= 0 ? EXIT_SUCCESS : EXIT_FAILURE;
}
projects / thirdparty / systemd.git / blobdiff