+++ /dev/null
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright 2010 Lennart Poettering
-
- 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/>.
-***/
-
-#include <errno.h>
-#include <string.h>
-#include <unistd.h>
-
-#ifdef HAVE_AUDIT
-#include <libaudit.h>
-#endif
-
-#include "sd-bus.h"
-
-#include "log.h"
-#include "macro.h"
-#include "util.h"
-#include "special.h"
-#include "utmp-wtmp.h"
-#include "bus-util.h"
-#include "bus-error.h"
-#include "unit-name.h"
-
-typedef struct Context {
- sd_bus *bus;
-#ifdef HAVE_AUDIT
- int audit_fd;
-#endif
-} Context;
-
-static usec_t get_startup_time(Context *c) {
- _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
- usec_t t = 0;
- int r;
-
- assert(c);
-
- r = sd_bus_get_property_trivial(
- c->bus,
- "org.freedesktop.systemd1",
- "/org/freedesktop/systemd1",
- "org.freedesktop.systemd1.Manager",
- "UserspaceTimestamp",
- &error,
- 't', &t);
- if (r < 0) {
- log_error("Failed to get timestamp: %s", bus_error_message(&error, -r));
- return 0;
- }
-
- return t;
-}
-
-static int get_current_runlevel(Context *c) {
- static const struct {
- const int runlevel;
- const char *special;
- } table[] = {
- /* The first target of this list that is active or has
- * a job scheduled wins. We prefer runlevels 5 and 3
- * here over the others, since these are the main
- * runlevels used on Fedora. It might make sense to
- * change the order on some distributions. */
- { '5', SPECIAL_GRAPHICAL_TARGET },
- { '3', SPECIAL_MULTI_USER_TARGET },
- { '1', SPECIAL_RESCUE_TARGET },
- };
-
- _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
- int r;
- unsigned i;
-
- assert(c);
-
- for (i = 0; i < ELEMENTSOF(table); i++) {
- _cleanup_free_ char *state = NULL, *path = NULL;
-
- path = unit_dbus_path_from_name(table[i].special);
- if (!path)
- return log_oom();
-
- r = sd_bus_get_property_string(
- c->bus,
- "org.freedesktop.systemd1",
- path,
- "org.freedesktop.systemd1.Unit",
- "ActiveState",
- &error,
- &state);
- if (r < 0) {
- log_warning("Failed to get state: %s", bus_error_message(&error, -r));
- return r;
- }
-
- if (streq(state, "active") || streq(state, "reloading"))
- return table[i].runlevel;
- }
-
- return 0;
-}
-
-static int on_reboot(Context *c) {
- int r = 0, q;
- usec_t t;
-
- assert(c);
-
- /* We finished start-up, so let's write the utmp
- * record and send the audit msg */
-
-#ifdef HAVE_AUDIT
- if (c->audit_fd >= 0)
- if (audit_log_user_comm_message(c->audit_fd, AUDIT_SYSTEM_BOOT, "", "systemd-update-utmp", NULL, NULL, NULL, 1) < 0 &&
- errno != EPERM) {
- log_error_errno(errno, "Failed to send audit message: %m");
- r = -errno;
- }
-#endif
-
- /* If this call fails it will return 0, which
- * utmp_put_reboot() will then fix to the current time */
- t = get_startup_time(c);
-
- q = utmp_put_reboot(t);
- if (q < 0) {
- log_error_errno(q, "Failed to write utmp record: %m");
- r = q;
- }
-
- return r;
-}
-
-static int on_shutdown(Context *c) {
- int r = 0, q;
-
- assert(c);
-
- /* We started shut-down, so let's write the utmp
- * record and send the audit msg */
-
-#ifdef HAVE_AUDIT
- if (c->audit_fd >= 0)
- if (audit_log_user_comm_message(c->audit_fd, AUDIT_SYSTEM_SHUTDOWN, "", "systemd-update-utmp", NULL, NULL, NULL, 1) < 0 &&
- errno != EPERM) {
- log_error_errno(errno, "Failed to send audit message: %m");
- r = -errno;
- }
-#endif
-
- q = utmp_put_shutdown();
- if (q < 0) {
- log_error_errno(q, "Failed to write utmp record: %m");
- r = q;
- }
-
- return r;
-}
-
-static int on_runlevel(Context *c) {
- int r = 0, q, previous, runlevel;
-
- assert(c);
-
- /* We finished changing runlevel, so let's write the
- * utmp record and send the audit msg */
-
- /* First, get last runlevel */
- q = utmp_get_runlevel(&previous, NULL);
-
- if (q < 0) {
- if (q != -ESRCH && q != -ENOENT)
- return log_error_errno(q, "Failed to get current runlevel: %m");
-
- previous = 0;
- }
-
- /* Secondly, get new runlevel */
- runlevel = get_current_runlevel(c);
-
- if (runlevel < 0)
- return runlevel;
-
- if (previous == runlevel)
- return 0;
-
-#ifdef HAVE_AUDIT
- if (c->audit_fd >= 0) {
- _cleanup_free_ char *s = NULL;
-
- if (asprintf(&s, "old-level=%c new-level=%c",
- previous > 0 ? previous : 'N',
- runlevel > 0 ? runlevel : 'N') < 0)
- return log_oom();
-
- if (audit_log_user_comm_message(c->audit_fd, AUDIT_SYSTEM_RUNLEVEL, s, "systemd-update-utmp", NULL, NULL, NULL, 1) < 0 &&
- errno != EPERM) {
- log_error_errno(errno, "Failed to send audit message: %m");
- r = -errno;
- }
- }
-#endif
-
- q = utmp_put_runlevel(runlevel, previous);
- if (q < 0 && q != -ESRCH && q != -ENOENT) {
- log_error_errno(q, "Failed to write utmp record: %m");
- r = q;
- }
-
- return r;
-}
-
-int main(int argc, char *argv[]) {
- Context c = {
-#ifdef HAVE_AUDIT
- .audit_fd = -1
-#endif
- };
- int r;
-
- if (getppid() != 1) {
- log_error("This program should be invoked by init only.");
- return EXIT_FAILURE;
- }
-
- if (argc != 2) {
- log_error("This program requires one argument.");
- return EXIT_FAILURE;
- }
-
- log_set_target(LOG_TARGET_AUTO);
- log_parse_environment();
- log_open();
-
- umask(0022);
-
-#ifdef HAVE_AUDIT
- /* If the kernel lacks netlink or audit support,
- * don't worry about it. */
- c.audit_fd = audit_open();
- if (c.audit_fd < 0 && errno != EAFNOSUPPORT && errno != EPROTONOSUPPORT)
- log_error_errno(errno, "Failed to connect to audit log: %m");
-#endif
- r = bus_open_system_systemd(&c.bus);
- if (r < 0) {
- log_error_errno(r, "Failed to get D-Bus connection: %m");
- r = -EIO;
- goto finish;
- }
-
- log_debug("systemd-update-utmp running as pid "PID_FMT, getpid());
-
- if (streq(argv[1], "reboot"))
- r = on_reboot(&c);
- else if (streq(argv[1], "shutdown"))
- r = on_shutdown(&c);
- else if (streq(argv[1], "runlevel"))
- r = on_runlevel(&c);
- else {
- log_error("Unknown command %s", argv[1]);
- r = -EINVAL;
- }
-
- log_debug("systemd-update-utmp stopped as pid "PID_FMT, getpid());
-
-finish:
-#ifdef HAVE_AUDIT
- if (c.audit_fd >= 0)
- audit_close(c.audit_fd);
-#endif
-
- if (c.bus)
- sd_bus_unref(c.bus);
-
- return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
-}
~ianmdlvl / elogind.git / blobdiff