main.c revision c3a170f3d3358135a39ac6eafe66f18aef0bd67d
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering/***
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering This file is part of systemd.
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering Copyright 2010 Lennart Poettering
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering systemd is free software; you can redistribute it and/or modify it
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering under the terms of the GNU Lesser General Public License as published by
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering the Free Software Foundation; either version 2.1 of the License, or
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering (at your option) any later version.
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering systemd is distributed in the hope that it will be useful, but
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering WITHOUT ANY WARRANTY; without even the implied warranty of
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering Lesser General Public License for more details.
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering You should have received a copy of the GNU Lesser General Public License
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering along with systemd; If not, see <http://www.gnu.org/licenses/>.
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering***/
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering#include <dbus/dbus.h>
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering#include <stdio.h>
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering#include <errno.h>
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering#include <string.h>
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering#include <unistd.h>
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering#include <sys/types.h>
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering#include <sys/stat.h>
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering#include <getopt.h>
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering#include <signal.h>
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering#include <sys/wait.h>
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering#include <fcntl.h>
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering#include <sys/prctl.h>
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering#include <sys/mount.h>
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering#include "manager.h"
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering#include "log.h"
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering#include "load-fragment.h"
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering#include "fdset.h"
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering#include "special.h"
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering#include "conf-parser.h"
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering#include "dbus-common.h"
7410616cd9dbbec97cf98d75324da5cda2b2f7a2Lennart Poettering#include "missing.h"
7410616cd9dbbec97cf98d75324da5cda2b2f7a2Lennart Poettering#include "label.h"
7410616cd9dbbec97cf98d75324da5cda2b2f7a2Lennart Poettering#include "build.h"
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering#include "strv.h"
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering#include "def.h"
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering#include "virt.h"
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering#include "watchdog.h"
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering#include "path-util.h"
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering#include "switch-root.h"
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering#include "capability.h"
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering#include "killall.h"
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering#include "env-util.h"
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering#include "hwclock.h"
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering#include "sd-daemon.h"
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering#include "sd-messages.h"
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering
7410616cd9dbbec97cf98d75324da5cda2b2f7a2Lennart Poettering#include "mount-setup.h"
7410616cd9dbbec97cf98d75324da5cda2b2f7a2Lennart Poettering#include "loopback-setup.h"
7410616cd9dbbec97cf98d75324da5cda2b2f7a2Lennart Poettering#ifdef HAVE_KMOD
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering#include "kmod-setup.h"
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering#endif
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering#include "hostname-setup.h"
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering#include "machine-id-setup.h"
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering#include "locale-setup.h"
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering#include "selinux-setup.h"
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering#include "ima-setup.h"
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering#include "fileio.h"
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering#include "smack-setup.h"
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering#include "efivars.h"
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poetteringstatic enum {
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering ACTION_RUN,
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering ACTION_HELP,
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering ACTION_VERSION,
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering ACTION_TEST,
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering ACTION_DUMP_CONFIGURATION_ITEMS,
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering ACTION_DONE
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering} arg_action = ACTION_RUN;
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poetteringstatic char *arg_default_unit = NULL;
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poetteringstatic SystemdRunningAs arg_running_as = _SYSTEMD_RUNNING_AS_INVALID;
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poetteringstatic bool arg_dump_core = true;
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poetteringstatic bool arg_crash_shell = false;
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poetteringstatic int arg_crash_chvt = -1;
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poetteringstatic bool arg_confirm_spawn = false;
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poetteringstatic bool arg_show_status = true;
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poetteringstatic bool arg_switched_root = false;
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poetteringstatic char **arg_default_controllers = NULL;
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poetteringstatic char ***arg_join_controllers = NULL;
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poetteringstatic ExecOutput arg_default_std_output = EXEC_OUTPUT_JOURNAL;
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poetteringstatic ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT;
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poetteringstatic usec_t arg_runtime_watchdog = 0;
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poetteringstatic usec_t arg_shutdown_watchdog = 10 * USEC_PER_MINUTE;
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poetteringstatic struct rlimit *arg_default_rlimit[RLIMIT_NLIMITS] = {};
94c156cd452424ea59931920df2454d9da7cb774Lennart Poetteringstatic uint64_t arg_capability_bounding_set_drop = 0;
94c156cd452424ea59931920df2454d9da7cb774Lennart Poetteringstatic nsec_t arg_timer_slack_nsec = (nsec_t) -1;
94c156cd452424ea59931920df2454d9da7cb774Lennart Poettering
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poetteringstatic FILE* serialization = NULL;
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poetteringstatic void nop_handler(int sig) {
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering}
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering_noreturn_ static void crash(int sig) {
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering if (!arg_dump_core)
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering log_error("Caught <%s>, not dumping core.", signal_to_string(sig));
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering else {
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering struct sigaction sa = {
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering .sa_handler = nop_handler,
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering .sa_flags = SA_NOCLDSTOP|SA_RESTART,
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering };
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering pid_t pid;
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering /* We want to wait for the core process, hence let's enable SIGCHLD */
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering pid = fork();
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering if (pid < 0)
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering log_error("Caught <%s>, cannot fork for core dump: %s", signal_to_string(sig), strerror(errno));
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering else if (pid == 0) {
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering struct rlimit rl = {};
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering /* Enable default signal handler for core dump */
94c156cd452424ea59931920df2454d9da7cb774Lennart Poettering zero(sa);
94c156cd452424ea59931920df2454d9da7cb774Lennart Poettering sa.sa_handler = SIG_DFL;
94c156cd452424ea59931920df2454d9da7cb774Lennart Poettering assert_se(sigaction(sig, &sa, NULL) == 0);
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering /* Don't limit the core dump size */
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering rl.rlim_cur = RLIM_INFINITY;
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering rl.rlim_max = RLIM_INFINITY;
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering setrlimit(RLIMIT_CORE, &rl);
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering /* Just to be sure... */
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering assert_se(chdir("/") == 0);
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering /* Raise the signal again */
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering raise(sig);
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering assert_not_reached("We shouldn't be here...");
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering _exit(1);
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering } else {
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering siginfo_t status;
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering int r;
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering /* Order things nicely. */
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering r = wait_for_terminate(pid, &status);
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering if (r < 0)
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig), strerror(-r));
b5884878a2874447b2a9f07f324a7cd909d96d48Lennart Poettering else if (status.si_code != CLD_DUMPED)
b5884878a2874447b2a9f07f324a7cd909d96d48Lennart Poettering log_error("Caught <%s>, core dump failed.", signal_to_string(sig));
da927ba997d68401563b927f92e6e40e021a8e5cMichal Schmidt else
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering log_error("Caught <%s>, dumped core as pid %lu.", signal_to_string(sig), (unsigned long) pid);
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering }
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering }
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering if (arg_crash_chvt)
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering chvt(arg_crash_chvt);
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering if (arg_crash_shell) {
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering struct sigaction sa = {
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering .sa_handler = SIG_IGN,
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering .sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART,
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering };
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering pid_t pid;
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering log_info("Executing crash shell in 10s...");
3c5a87a879e3eb66c9c159a26051d940ff2db7a1Lennart Poettering sleep(10);
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering /* Let the kernel reap children for us */
326bb68c40ff2a7119c344b9ab7a7473f9fcdf3cLennart Poettering assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
pid = fork();
if (pid < 0)
log_error("Failed to fork off crash shell: %m");
else if (pid == 0) {
make_console_stdio();
execl("/bin/sh", "/bin/sh", NULL);
log_error("execl() failed: %m");
_exit(1);
}
log_info("Successfully spawned crash shell as pid %lu.", (unsigned long) pid);
}
log_info("Freezing execution.");
freeze();
}
static void install_crash_handler(void) {
struct sigaction sa = {
.sa_handler = crash,
.sa_flags = SA_NODEFER,
};
sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
}
static int console_setup(bool do_reset) {
int tty_fd, r;
/* If we are init, we connect stdin/stdout/stderr to /dev/null
* and make sure we don't have a controlling tty. */
release_terminal();
if (!do_reset)
return 0;
tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
if (tty_fd < 0) {
log_error("Failed to open /dev/console: %s", strerror(-tty_fd));
return -tty_fd;
}
/* We don't want to force text mode.
* plymouth may be showing pictures already from initrd. */
r = reset_terminal_fd(tty_fd, false);
if (r < 0)
log_error("Failed to reset /dev/console: %s", strerror(-r));
close_nointr_nofail(tty_fd);
return r;
}
static int set_default_unit(const char *u) {
char *c;
assert(u);
c = strdup(u);
if (!c)
return -ENOMEM;
free(arg_default_unit);
arg_default_unit = c;
return 0;
}
static int parse_proc_cmdline_word(const char *word) {
static const char * const rlmap[] = {
"emergency", SPECIAL_EMERGENCY_TARGET,
"-b", SPECIAL_EMERGENCY_TARGET,
"single", SPECIAL_RESCUE_TARGET,
"-s", SPECIAL_RESCUE_TARGET,
"s", SPECIAL_RESCUE_TARGET,
"S", SPECIAL_RESCUE_TARGET,
"1", SPECIAL_RESCUE_TARGET,
"2", SPECIAL_RUNLEVEL2_TARGET,
"3", SPECIAL_RUNLEVEL3_TARGET,
"4", SPECIAL_RUNLEVEL4_TARGET,
"5", SPECIAL_RUNLEVEL5_TARGET,
};
assert(word);
if (startswith(word, "systemd.unit=")) {
if (!in_initrd())
return set_default_unit(word + 13);
} else if (startswith(word, "rd.systemd.unit=")) {
if (in_initrd())
return set_default_unit(word + 16);
} else if (startswith(word, "systemd.log_target=")) {
if (log_set_target_from_string(word + 19) < 0)
log_warning("Failed to parse log target %s. Ignoring.", word + 19);
} else if (startswith(word, "systemd.log_level=")) {
if (log_set_max_level_from_string(word + 18) < 0)
log_warning("Failed to parse log level %s. Ignoring.", word + 18);
} else if (startswith(word, "systemd.log_color=")) {
if (log_show_color_from_string(word + 18) < 0)
log_warning("Failed to parse log color setting %s. Ignoring.", word + 18);
} else if (startswith(word, "systemd.log_location=")) {
if (log_show_location_from_string(word + 21) < 0)
log_warning("Failed to parse log location setting %s. Ignoring.", word + 21);
} else if (startswith(word, "systemd.dump_core=")) {
int r;
if ((r = parse_boolean(word + 18)) < 0)
log_warning("Failed to parse dump core switch %s. Ignoring.", word + 18);
else
arg_dump_core = r;
} else if (startswith(word, "systemd.crash_shell=")) {
int r;
if ((r = parse_boolean(word + 20)) < 0)
log_warning("Failed to parse crash shell switch %s. Ignoring.", word + 20);
else
arg_crash_shell = r;
} else if (startswith(word, "systemd.confirm_spawn=")) {
int r;
if ((r = parse_boolean(word + 22)) < 0)
log_warning("Failed to parse confirm spawn switch %s. Ignoring.", word + 22);
else
arg_confirm_spawn = r;
} else if (startswith(word, "systemd.crash_chvt=")) {
int k;
if (safe_atoi(word + 19, &k) < 0)
log_warning("Failed to parse crash chvt switch %s. Ignoring.", word + 19);
else
arg_crash_chvt = k;
} else if (startswith(word, "systemd.show_status=")) {
int r;
if ((r = parse_boolean(word + 20)) < 0)
log_warning("Failed to parse show status switch %s. Ignoring.", word + 20);
else
arg_show_status = r;
} else if (startswith(word, "systemd.default_standard_output=")) {
int r;
if ((r = exec_output_from_string(word + 32)) < 0)
log_warning("Failed to parse default standard output switch %s. Ignoring.", word + 32);
else
arg_default_std_output = r;
} else if (startswith(word, "systemd.default_standard_error=")) {
int r;
if ((r = exec_output_from_string(word + 31)) < 0)
log_warning("Failed to parse default standard error switch %s. Ignoring.", word + 31);
else
arg_default_std_error = r;
} else if (startswith(word, "systemd.setenv=")) {
_cleanup_free_ char *cenv = NULL;
char *eq;
int r;
cenv = strdup(word + 15);
if (!cenv)
return -ENOMEM;
eq = strchr(cenv, '=');
if (!eq) {
if (!env_name_is_valid(cenv))
log_warning("Environment variable name '%s' is not valid. Ignoring.", cenv);
else {
r = unsetenv(cenv);
if (r < 0)
log_warning("Unsetting environment variable '%s' failed, ignoring: %m", cenv);
}
} else {
if (!env_assignment_is_valid(cenv))
log_warning("Environment variable assignment '%s' is not valid. Ignoring.", cenv);
else {
*eq = 0;
r = setenv(cenv, eq + 1, 1);
if (r < 0)
log_warning("Setting environment variable '%s=%s' failed, ignoring: %m", cenv, eq + 1);
}
}
} else if (startswith(word, "systemd.") ||
(in_initrd() && startswith(word, "rd.systemd."))) {
const char *c;
/* Ignore systemd.journald.xyz and friends */
c = word;
if (startswith(c, "rd."))
c += 3;
if (startswith(c, "systemd."))
c += 8;
if (c[strcspn(c, ".=")] != '.') {
log_warning("Unknown kernel switch %s. Ignoring.", word);
log_info("Supported kernel switches:\n"
"systemd.unit=UNIT Default unit to start\n"
"rd.systemd.unit=UNIT Default unit to start when run in initrd\n"
"systemd.dump_core=0|1 Dump core on crash\n"
"systemd.crash_shell=0|1 Run shell on crash\n"
"systemd.crash_chvt=N Change to VT #N on crash\n"
"systemd.confirm_spawn=0|1 Confirm every process spawn\n"
"systemd.show_status=0|1 Show status updates on the console during bootup\n"
"systemd.log_target=console|kmsg|journal|journal-or-kmsg|syslog|syslog-or-kmsg|null\n"
" Log target\n"
"systemd.log_level=LEVEL Log level\n"
"systemd.log_color=0|1 Highlight important log messages\n"
"systemd.log_location=0|1 Include code location in log messages\n"
"systemd.default_standard_output=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
" Set default log output for services\n"
"systemd.default_standard_error=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
" Set default log error output for services\n"
"systemd.setenv=ASSIGNMENT Set an environment variable for all spawned processes\n");
}
} else if (streq(word, "quiet"))
arg_show_status = false;
else if (!in_initrd()) {
unsigned i;
/* SysV compatibility */
for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
if (streq(word, rlmap[i]))
return set_default_unit(rlmap[i+1]);
}
return 0;
}
#define DEFINE_SETTER(name, func, descr) \
static int name(const char *unit, \
const char *filename, \
unsigned line, \
const char *section, \
const char *lvalue, \
int ltype, \
const char *rvalue, \
void *data, \
void *userdata) { \
\
int r; \
\
assert(filename); \
assert(lvalue); \
assert(rvalue); \
\
r = func(rvalue); \
if (r < 0) \
log_syntax(unit, LOG_ERR, filename, line, -r, \
"Invalid " descr "'%s': %s", \
rvalue, strerror(-r)); \
\
return 0; \
}
DEFINE_SETTER(config_parse_level2, log_set_max_level_from_string, "log level")
DEFINE_SETTER(config_parse_target, log_set_target_from_string, "target")
DEFINE_SETTER(config_parse_color, log_show_color_from_string, "color" )
DEFINE_SETTER(config_parse_location, log_show_location_from_string, "location")
static int config_parse_cpu_affinity2(const char *unit,
const char *filename,
unsigned line,
const char *section,
const char *lvalue,
int ltype,
const char *rvalue,
void *data,
void *userdata) {
char *w;
size_t l;
char *state;
cpu_set_t *c = NULL;
unsigned ncpus = 0;
assert(filename);
assert(lvalue);
assert(rvalue);
FOREACH_WORD_QUOTED(w, l, rvalue, state) {
char *t;
int r;
unsigned cpu;
if (!(t = strndup(w, l)))
return log_oom();
r = safe_atou(t, &cpu);
free(t);
if (!c)
if (!(c = cpu_set_malloc(&ncpus)))
return log_oom();
if (r < 0 || cpu >= ncpus) {
log_syntax(unit, LOG_ERR, filename, line, -r,
"Failed to parse CPU affinity '%s'", rvalue);
CPU_FREE(c);
return -EBADMSG;
}
CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
}
if (c) {
if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
log_warning_unit(unit, "Failed to set CPU affinity: %m");
CPU_FREE(c);
}
return 0;
}
static void strv_free_free(char ***l) {
char ***i;
if (!l)
return;
for (i = l; *i; i++)
strv_free(*i);
free(l);
}
static void free_join_controllers(void) {
strv_free_free(arg_join_controllers);
arg_join_controllers = NULL;
}
static int config_parse_join_controllers(const char *unit,
const char *filename,
unsigned line,
const char *section,
const char *lvalue,
int ltype,
const char *rvalue,
void *data,
void *userdata) {
unsigned n = 0;
char *state, *w;
size_t length;
assert(filename);
assert(lvalue);
assert(rvalue);
free_join_controllers();
FOREACH_WORD_QUOTED(w, length, rvalue, state) {
char *s, **l;
s = strndup(w, length);
if (!s)
return log_oom();
l = strv_split(s, ",");
free(s);
strv_uniq(l);
if (strv_length(l) <= 1) {
strv_free(l);
continue;
}
if (!arg_join_controllers) {
arg_join_controllers = new(char**, 2);
if (!arg_join_controllers) {
strv_free(l);
return log_oom();
}
arg_join_controllers[0] = l;
arg_join_controllers[1] = NULL;
n = 1;
} else {
char ***a;
char ***t;
t = new0(char**, n+2);
if (!t) {
strv_free(l);
return log_oom();
}
n = 0;
for (a = arg_join_controllers; *a; a++) {
if (strv_overlap(*a, l)) {
char **c;
c = strv_merge(*a, l);
if (!c) {
strv_free(l);
strv_free_free(t);
return log_oom();
}
strv_free(l);
l = c;
} else {
char **c;
c = strv_copy(*a);
if (!c) {
strv_free(l);
strv_free_free(t);
return log_oom();
}
t[n++] = c;
}
}
t[n++] = strv_uniq(l);
strv_free_free(arg_join_controllers);
arg_join_controllers = t;
}
}
return 0;
}
static int parse_config_file(void) {
const ConfigTableItem items[] = {
{ "Manager", "LogLevel", config_parse_level2, 0, NULL },
{ "Manager", "LogTarget", config_parse_target, 0, NULL },
{ "Manager", "LogColor", config_parse_color, 0, NULL },
{ "Manager", "LogLocation", config_parse_location, 0, NULL },
{ "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core },
{ "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell },
{ "Manager", "ShowStatus", config_parse_bool, 0, &arg_show_status },
{ "Manager", "CrashChVT", config_parse_int, 0, &arg_crash_chvt },
{ "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL },
{ "Manager", "DefaultControllers", config_parse_strv, 0, &arg_default_controllers },
{ "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output },
{ "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error },
{ "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers },
{ "Manager", "RuntimeWatchdogSec", config_parse_sec, 0, &arg_runtime_watchdog },
{ "Manager", "ShutdownWatchdogSec", config_parse_sec, 0, &arg_shutdown_watchdog },
{ "Manager", "CapabilityBoundingSet", config_parse_bounding_set, 0, &arg_capability_bounding_set_drop },
{ "Manager", "TimerSlackNSec", config_parse_nsec, 0, &arg_timer_slack_nsec },
{ "Manager", "DefaultLimitCPU", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CPU]},
{ "Manager", "DefaultLimitFSIZE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_FSIZE]},
{ "Manager", "DefaultLimitDATA", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_DATA]},
{ "Manager", "DefaultLimitSTACK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_STACK]},
{ "Manager", "DefaultLimitCORE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CORE]},
{ "Manager", "DefaultLimitRSS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RSS]},
{ "Manager", "DefaultLimitNOFILE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NOFILE]},
{ "Manager", "DefaultLimitAS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_AS]},
{ "Manager", "DefaultLimitNPROC", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NPROC]},
{ "Manager", "DefaultLimitMEMLOCK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MEMLOCK]},
{ "Manager", "DefaultLimitLOCKS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_LOCKS]},
{ "Manager", "DefaultLimitSIGPENDING",config_parse_limit, 0, &arg_default_rlimit[RLIMIT_SIGPENDING]},
{ "Manager", "DefaultLimitMSGQUEUE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MSGQUEUE]},
{ "Manager", "DefaultLimitNICE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NICE]},
{ "Manager", "DefaultLimitRTPRIO", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTPRIO]},
{ "Manager", "DefaultLimitRTTIME", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTTIME]},
{ NULL, NULL, NULL, 0, NULL }
};
_cleanup_fclose_ FILE *f;
const char *fn;
int r;
fn = arg_running_as == SYSTEMD_SYSTEM ? SYSTEM_CONFIG_FILE : USER_CONFIG_FILE;
f = fopen(fn, "re");
if (!f) {
if (errno == ENOENT)
return 0;
log_warning("Failed to open configuration file '%s': %m", fn);
return 0;
}
r = config_parse(NULL, fn, f, "Manager\0", config_item_table_lookup, (void*) items, false, false, NULL);
if (r < 0)
log_warning("Failed to parse configuration file: %s", strerror(-r));
return 0;
}
static int parse_proc_cmdline(void) {
_cleanup_free_ char *line = NULL;
char *w, *state;
int r;
size_t l;
/* Don't read /proc/cmdline if we are in a container, since
* that is only relevant for the host system */
if (detect_container(NULL) > 0)
return 0;
r = read_one_line_file("/proc/cmdline", &line);
if (r < 0) {
log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
return 0;
}
FOREACH_WORD_QUOTED(w, l, line, state) {
_cleanup_free_ char *word;
word = strndup(w, l);
if (!word)
return log_oom();
r = parse_proc_cmdline_word(word);
if (r < 0) {
log_error("Failed on cmdline argument %s: %s", word, strerror(-r));
return r;
}
}
return 0;
}
static int parse_argv(int argc, char *argv[]) {
enum {
ARG_LOG_LEVEL = 0x100,
ARG_LOG_TARGET,
ARG_LOG_COLOR,
ARG_LOG_LOCATION,
ARG_UNIT,
ARG_SYSTEM,
ARG_USER,
ARG_TEST,
ARG_VERSION,
ARG_DUMP_CONFIGURATION_ITEMS,
ARG_DUMP_CORE,
ARG_CRASH_SHELL,
ARG_CONFIRM_SPAWN,
ARG_SHOW_STATUS,
ARG_DESERIALIZE,
ARG_SWITCHED_ROOT,
ARG_INTROSPECT,
ARG_DEFAULT_STD_OUTPUT,
ARG_DEFAULT_STD_ERROR
};
static const struct option options[] = {
{ "log-level", required_argument, NULL, ARG_LOG_LEVEL },
{ "log-target", required_argument, NULL, ARG_LOG_TARGET },
{ "log-color", optional_argument, NULL, ARG_LOG_COLOR },
{ "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
{ "unit", required_argument, NULL, ARG_UNIT },
{ "system", no_argument, NULL, ARG_SYSTEM },
{ "user", no_argument, NULL, ARG_USER },
{ "test", no_argument, NULL, ARG_TEST },
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, ARG_VERSION },
{ "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
{ "dump-core", optional_argument, NULL, ARG_DUMP_CORE },
{ "crash-shell", optional_argument, NULL, ARG_CRASH_SHELL },
{ "confirm-spawn", optional_argument, NULL, ARG_CONFIRM_SPAWN },
{ "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
{ "deserialize", required_argument, NULL, ARG_DESERIALIZE },
{ "switched-root", no_argument, NULL, ARG_SWITCHED_ROOT },
{ "introspect", optional_argument, NULL, ARG_INTROSPECT },
{ "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
{ "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
{ NULL, 0, NULL, 0 }
};
int c, r;
assert(argc >= 1);
assert(argv);
if (getpid() == 1)
opterr = 0;
while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
switch (c) {
case ARG_LOG_LEVEL:
if ((r = log_set_max_level_from_string(optarg)) < 0) {
log_error("Failed to parse log level %s.", optarg);
return r;
}
break;
case ARG_LOG_TARGET:
if ((r = log_set_target_from_string(optarg)) < 0) {
log_error("Failed to parse log target %s.", optarg);
return r;
}
break;
case ARG_LOG_COLOR:
if (optarg) {
if ((r = log_show_color_from_string(optarg)) < 0) {
log_error("Failed to parse log color setting %s.", optarg);
return r;
}
} else
log_show_color(true);
break;
case ARG_LOG_LOCATION:
if (optarg) {
if ((r = log_show_location_from_string(optarg)) < 0) {
log_error("Failed to parse log location setting %s.", optarg);
return r;
}
} else
log_show_location(true);
break;
case ARG_DEFAULT_STD_OUTPUT:
if ((r = exec_output_from_string(optarg)) < 0) {
log_error("Failed to parse default standard output setting %s.", optarg);
return r;
} else
arg_default_std_output = r;
break;
case ARG_DEFAULT_STD_ERROR:
if ((r = exec_output_from_string(optarg)) < 0) {
log_error("Failed to parse default standard error output setting %s.", optarg);
return r;
} else
arg_default_std_error = r;
break;
case ARG_UNIT:
if ((r = set_default_unit(optarg)) < 0) {
log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
return r;
}
break;
case ARG_SYSTEM:
arg_running_as = SYSTEMD_SYSTEM;
break;
case ARG_USER:
arg_running_as = SYSTEMD_USER;
break;
case ARG_TEST:
arg_action = ACTION_TEST;
break;
case ARG_VERSION:
arg_action = ACTION_VERSION;
break;
case ARG_DUMP_CONFIGURATION_ITEMS:
arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
break;
case ARG_DUMP_CORE:
r = optarg ? parse_boolean(optarg) : 1;
if (r < 0) {
log_error("Failed to parse dump core boolean %s.", optarg);
return r;
}
arg_dump_core = r;
break;
case ARG_CRASH_SHELL:
r = optarg ? parse_boolean(optarg) : 1;
if (r < 0) {
log_error("Failed to parse crash shell boolean %s.", optarg);
return r;
}
arg_crash_shell = r;
break;
case ARG_CONFIRM_SPAWN:
r = optarg ? parse_boolean(optarg) : 1;
if (r < 0) {
log_error("Failed to parse confirm spawn boolean %s.", optarg);
return r;
}
arg_confirm_spawn = r;
break;
case ARG_SHOW_STATUS:
r = optarg ? parse_boolean(optarg) : 1;
if (r < 0) {
log_error("Failed to parse show status boolean %s.", optarg);
return r;
}
arg_show_status = r;
break;
case ARG_DESERIALIZE: {
int fd;
FILE *f;
r = safe_atoi(optarg, &fd);
if (r < 0 || fd < 0) {
log_error("Failed to parse deserialize option %s.", optarg);
return r < 0 ? r : -EINVAL;
}
fd_cloexec(fd, true);
f = fdopen(fd, "r");
if (!f) {
log_error("Failed to open serialization fd: %m");
return -errno;
}
if (serialization)
fclose(serialization);
serialization = f;
break;
}
case ARG_SWITCHED_ROOT:
arg_switched_root = true;
break;
case ARG_INTROSPECT: {
const char * const * i = NULL;
for (i = bus_interface_table; *i; i += 2)
if (!optarg || streq(i[0], optarg)) {
fputs(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE
"<node>\n", stdout);
fputs(i[1], stdout);
fputs("</node>\n", stdout);
if (optarg)
break;
}
if (!i[0] && optarg)
log_error("Unknown interface %s.", optarg);
arg_action = ACTION_DONE;
break;
}
case 'h':
arg_action = ACTION_HELP;
break;
case 'D':
log_set_max_level(LOG_DEBUG);
break;
case 'b':
case 's':
case 'z':
/* Just to eat away the sysvinit kernel
* cmdline args without getopt() error
* messages that we'll parse in
* parse_proc_cmdline_word() or ignore. */
case '?':
default:
if (getpid() != 1) {
log_error("Unknown option code %c", c);
return -EINVAL;
}
break;
}
if (optind < argc && getpid() != 1) {
/* Hmm, when we aren't run as init system
* let's complain about excess arguments */
log_error("Excess arguments.");
return -EINVAL;
}
if (detect_container(NULL) > 0) {
char **a;
/* All /proc/cmdline arguments the kernel didn't
* understand it passed to us. We're not really
* interested in that usually since /proc/cmdline is
* more interesting and complete. With one exception:
* if we are run in a container /proc/cmdline is not
* relevant for the container, hence we rely on argv[]
* instead. */
for (a = argv; a < argv + argc; a++)
if ((r = parse_proc_cmdline_word(*a)) < 0) {
log_error("Failed on cmdline argument %s: %s", *a, strerror(-r));
return r;
}
}
return 0;
}
static int help(void) {
printf("%s [OPTIONS...]\n\n"
"Starts up and maintains the system or user services.\n\n"
" -h --help Show this help\n"
" --test Determine startup sequence, dump it and exit\n"
" --dump-configuration-items Dump understood unit configuration items\n"
" --introspect[=INTERFACE] Extract D-Bus interface data\n"
" --unit=UNIT Set default unit\n"
" --system Run a system instance, even if PID != 1\n"
" --user Run a user instance\n"
" --dump-core[=0|1] Dump core on crash\n"
" --crash-shell[=0|1] Run shell on crash\n"
" --confirm-spawn[=0|1] Ask for confirmation when spawning processes\n"
" --show-status[=0|1] Show status updates on the console during bootup\n"
" --log-target=TARGET Set log target (console, journal, syslog, kmsg, journal-or-kmsg, syslog-or-kmsg, null)\n"
" --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
" --log-color[=0|1] Highlight important log messages\n"
" --log-location[=0|1] Include code location in log messages\n"
" --default-standard-output= Set default standard output for services\n"
" --default-standard-error= Set default standard error output for services\n",
program_invocation_short_name);
return 0;
}
static int version(void) {
puts(PACKAGE_STRING);
puts(SYSTEMD_FEATURES);
return 0;
}
static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching_root) {
FILE *f = NULL;
FDSet *fds = NULL;
int r;
assert(m);
assert(_f);
assert(_fds);
/* Make sure nothing is really destructed when we shut down */
m->n_reloading ++;
r = manager_open_serialization(m, &f);
if (r < 0) {
log_error("Failed to create serialization file: %s", strerror(-r));
goto fail;
}
fds = fdset_new();
if (!fds) {
r = -ENOMEM;
log_error("Failed to allocate fd set: %s", strerror(-r));
goto fail;
}
r = manager_serialize(m, f, fds, switching_root);
if (r < 0) {
log_error("Failed to serialize state: %s", strerror(-r));
goto fail;
}
if (fseeko(f, 0, SEEK_SET) < 0) {
log_error("Failed to rewind serialization fd: %m");
goto fail;
}
r = fd_cloexec(fileno(f), false);
if (r < 0) {
log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
goto fail;
}
r = fdset_cloexec(fds, false);
if (r < 0) {
log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
goto fail;
}
*_f = f;
*_fds = fds;
return 0;
fail:
fdset_free(fds);
if (f)
fclose(f);
return r;
}
static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
struct rlimit nl;
int r;
assert(saved_rlimit);
/* Save the original RLIMIT_NOFILE so that we can reset it
* later when transitioning from the initrd to the main
* systemd or suchlike. */
if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0) {
log_error("Reading RLIMIT_NOFILE failed: %m");
return -errno;
}
/* Make sure forked processes get the default kernel setting */
if (!arg_default_rlimit[RLIMIT_NOFILE]) {
struct rlimit *rl;
rl = newdup(struct rlimit, saved_rlimit, 1);
if (!rl)
return log_oom();
arg_default_rlimit[RLIMIT_NOFILE] = rl;
}
/* Bump up the resource limit for ourselves substantially */
nl.rlim_cur = nl.rlim_max = 64*1024;
r = setrlimit_closest(RLIMIT_NOFILE, &nl);
if (r < 0) {
log_error("Setting RLIMIT_NOFILE failed: %s", strerror(-r));
return r;
}
return 0;
}
static struct dual_timestamp* parse_initrd_timestamp(struct dual_timestamp *t) {
const char *e;
unsigned long long a, b;
assert(t);
e = getenv("RD_TIMESTAMP");
if (!e)
return NULL;
if (sscanf(e, "%llu %llu", &a, &b) != 2)
return NULL;
t->realtime = (usec_t) a;
t->monotonic = (usec_t) b;
return t;
}
static void test_mtab(void) {
char *p;
/* Check that /etc/mtab is a symlink */
if (readlink_malloc("/etc/mtab", &p) >= 0) {
bool b;
b = streq(p, "/proc/self/mounts") || streq(p, "/proc/mounts");
free(p);
if (b)
return;
}
log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
"This is not supported anymore. "
"Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
}
static void test_usr(void) {
/* Check that /usr is not a separate fs */
if (dir_is_empty("/usr") <= 0)
return;
log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
"Some things will probably break (sometimes even silently) in mysterious ways. "
"Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
}
static void test_cgroups(void) {
if (access("/proc/cgroups", F_OK) >= 0)
return;
log_warning("CONFIG_CGROUPS was not set when your kernel was compiled. "
"Systems without control groups are not supported. "
"We will now sleep for 10s, and then continue boot-up. "
"Expect breakage and please do not file bugs. "
"Instead fix your kernel and enable CONFIG_CGROUPS. "
"Consult http://0pointer.de/blog/projects/cgroups-vs-cgroups.html for more information.");
sleep(10);
}
static int initialize_join_controllers(void) {
/* By default, mount "cpu" + "cpuacct" together, and "net_cls"
* + "net_prio". We'd like to add "cpuset" to the mix, but
* "cpuset" does't really work for groups with no initialized
* attributes. */
arg_join_controllers = new(char**, 3);
if (!arg_join_controllers)
return -ENOMEM;
arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL);
arg_join_controllers[2] = NULL;
if (!arg_join_controllers[0] || !arg_join_controllers[1]) {
free_join_controllers();
return -ENOMEM;
}
return 0;
}
int main(int argc, char *argv[]) {
Manager *m = NULL;
int r, retval = EXIT_FAILURE;
usec_t before_startup, after_startup;
char timespan[FORMAT_TIMESPAN_MAX];
FDSet *fds = NULL;
bool reexecute = false;
const char *shutdown_verb = NULL;
dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
dual_timestamp userspace_timestamp = { 0ULL, 0ULL };
dual_timestamp kernel_timestamp = { 0ULL, 0ULL };
dual_timestamp firmware_timestamp = { 0ULL, 0ULL };
dual_timestamp loader_timestamp = { 0ULL, 0ULL };
static char systemd[] = "systemd";
bool skip_setup = false;
int j;
bool loaded_policy = false;
bool arm_reboot_watchdog = false;
bool queue_default_job = false;
char *switch_root_dir = NULL, *switch_root_init = NULL;
static struct rlimit saved_rlimit_nofile = { 0, 0 };
#ifdef HAVE_SYSV_COMPAT
if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
/* This is compatibility support for SysV, where
* calling init as a user is identical to telinit. */
errno = -ENOENT;
execv(SYSTEMCTL_BINARY_PATH, argv);
log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
return 1;
}
#endif
dual_timestamp_from_monotonic(&kernel_timestamp, 0);
dual_timestamp_get(&userspace_timestamp);
/* Determine if this is a reexecution or normal bootup. We do
* the full command line parsing much later, so let's just
* have a quick peek here. */
if (strv_find(argv+1, "--deserialize"))
skip_setup = true;
/* If we have switched root, do all the special setup
* things */
if (strv_find(argv+1, "--switched-root"))
skip_setup = false;
/* If we get started via the /sbin/init symlink then we are
called 'init'. After a subsequent reexecution we are then
called 'systemd'. That is confusing, hence let's call us
systemd right-away. */
program_invocation_short_name = systemd;
prctl(PR_SET_NAME, systemd);
saved_argv = argv;
saved_argc = argc;
log_show_color(isatty(STDERR_FILENO) > 0);
if (getpid() == 1 && detect_container(NULL) <= 0) {
#ifdef ENABLE_EFI
efi_get_boot_timestamps(&userspace_timestamp, &firmware_timestamp, &loader_timestamp);
#endif
/* Running outside of a container as PID 1 */
arg_running_as = SYSTEMD_SYSTEM;
make_null_stdio();
log_set_target(LOG_TARGET_KMSG);
log_open();
if (in_initrd()) {
char *rd_timestamp = NULL;
initrd_timestamp = userspace_timestamp;
asprintf(&rd_timestamp, "%llu %llu",
(unsigned long long) initrd_timestamp.realtime,
(unsigned long long) initrd_timestamp.monotonic);
if (rd_timestamp) {
setenv("RD_TIMESTAMP", rd_timestamp, 1);
free(rd_timestamp);
}
}
if (!skip_setup) {
mount_setup_early();
if (selinux_setup(&loaded_policy) < 0)
goto finish;
if (ima_setup() < 0)
goto finish;
if (smack_setup() < 0)
goto finish;
}
if (label_init(NULL) < 0)
goto finish;
if (!skip_setup) {
if (hwclock_is_localtime() > 0) {
int min;
/* The first-time call to settimeofday() does a time warp in the kernel */
r = hwclock_set_timezone(&min);
if (r < 0)
log_error("Failed to apply local time delta, ignoring: %s", strerror(-r));
else
log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
} else if (!in_initrd()) {
/*
* Do dummy first-time call to seal the kernel's time warp magic
*
* Do not call this this from inside the initrd. The initrd might not
* carry /etc/adjtime with LOCAL, but the real system could be set up
* that way. In such case, we need to delay the time-warp or the sealing
* until we reach the real system.
*/
hwclock_reset_timezone();
/* Tell the kernel our time zone */
r = hwclock_set_timezone(NULL);
if (r < 0)
log_error("Failed to set the kernel's time zone, ignoring: %s", strerror(-r));
}
}
/* Set the default for later on, but don't actually
* open the logs like this for now. Note that if we
* are transitioning from the initrd there might still
* be journal fd open, and we shouldn't attempt
* opening that before we parsed /proc/cmdline which
* might redirect output elsewhere. */
log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
} else if (getpid() == 1) {
/* Running inside a container, as PID 1 */
arg_running_as = SYSTEMD_SYSTEM;
log_set_target(LOG_TARGET_CONSOLE);
log_open();
/* For the later on, see above... */
log_set_target(LOG_TARGET_JOURNAL);
/* clear the kernel timestamp,
* because we are in a container */
kernel_timestamp.monotonic = 0ULL;
kernel_timestamp.realtime = 0ULL;
} else {
/* Running as user instance */
arg_running_as = SYSTEMD_USER;
log_set_target(LOG_TARGET_AUTO);
log_open();
/* clear the kernel timestamp,
* because we are not PID 1 */
kernel_timestamp.monotonic = 0ULL;
kernel_timestamp.realtime = 0ULL;
}
/* Initialize default unit */
r = set_default_unit(SPECIAL_DEFAULT_TARGET);
if (r < 0) {
log_error("Failed to set default unit %s: %s", SPECIAL_DEFAULT_TARGET, strerror(-r));
goto finish;
}
r = initialize_join_controllers();
if (r < 0)
goto finish;
/* Mount /proc, /sys and friends, so that /proc/cmdline and
* /proc/$PID/fd is available. */
if (getpid() == 1) {
r = mount_setup(loaded_policy);
if (r < 0)
goto finish;
}
/* Reset all signal handlers. */
assert_se(reset_all_signal_handlers() == 0);
/* If we are init, we can block sigkill. Yay. */
ignore_signals(SIGNALS_IGNORE, -1);
if (parse_config_file() < 0)
goto finish;
if (arg_running_as == SYSTEMD_SYSTEM)
if (parse_proc_cmdline() < 0)
goto finish;
log_parse_environment();
if (parse_argv(argc, argv) < 0)
goto finish;
if (arg_action == ACTION_TEST &&
geteuid() == 0) {
log_error("Don't run test mode as root.");
goto finish;
}
if (arg_running_as == SYSTEMD_USER &&
arg_action == ACTION_RUN &&
sd_booted() <= 0) {
log_error("Trying to run as user instance, but the system has not been booted with systemd.");
goto finish;
}
if (arg_running_as == SYSTEMD_SYSTEM &&
arg_action == ACTION_RUN &&
running_in_chroot() > 0) {
log_error("Cannot be run in a chroot() environment.");
goto finish;
}
if (arg_action == ACTION_HELP) {
retval = help();
goto finish;
} else if (arg_action == ACTION_VERSION) {
retval = version();
goto finish;
} else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
unit_dump_config_items(stdout);
retval = EXIT_SUCCESS;
goto finish;
} else if (arg_action == ACTION_DONE) {
retval = EXIT_SUCCESS;
goto finish;
}
assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
/* Close logging fds, in order not to confuse fdset below */
log_close();
/* Remember open file descriptors for later deserialization */
r = fdset_new_fill(&fds);
if (r < 0) {
log_error("Failed to allocate fd set: %s", strerror(-r));
goto finish;
} else
fdset_cloexec(fds, true);
if (serialization)
assert_se(fdset_remove(fds, fileno(serialization)) >= 0);
/* Set up PATH unless it is already set */
setenv("PATH",
#ifdef HAVE_SPLIT_USR
"/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
#else
"/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin",
#endif
arg_running_as == SYSTEMD_SYSTEM);
if (arg_running_as == SYSTEMD_SYSTEM) {
/* Parse the data passed to us. We leave this
* variables set, but the manager later on will not
* pass them on to our children. */
if (!in_initrd())
parse_initrd_timestamp(&initrd_timestamp);
/* Unset some environment variables passed in from the
* kernel that don't really make sense for us. */
unsetenv("HOME");
unsetenv("TERM");
/* When we are invoked by a shell, these might be set,
* but make little sense to pass on */
unsetenv("PWD");
unsetenv("SHLVL");
unsetenv("_");
/* When we are invoked by a chroot-like tool such as
* nspawn, these might be set, but make little sense
* to pass on */
unsetenv("USER");
unsetenv("LOGNAME");
/* We suppress the socket activation env vars, as
* we'll try to match *any* open fd to units if
* possible. */
unsetenv("LISTEN_FDS");
unsetenv("LISTEN_PID");
/* All other variables are left as is, so that clients
* can still read them via /proc/1/environ */
}
/* Move out of the way, so that we won't block unmounts */
assert_se(chdir("/") == 0);
if (arg_running_as == SYSTEMD_SYSTEM) {
/* Become a session leader if we aren't one yet. */
setsid();
/* Disable the umask logic */
umask(0);
}
/* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */
dbus_connection_set_change_sigpipe(FALSE);
/* Reset the console, but only if this is really init and we
* are freshly booted */
if (arg_running_as == SYSTEMD_SYSTEM && arg_action == ACTION_RUN)
console_setup(getpid() == 1 && !skip_setup);
/* Open the logging devices, if possible and necessary */
log_open();
/* Make sure we leave a core dump without panicing the
* kernel. */
if (getpid() == 1) {
install_crash_handler();
r = mount_cgroup_controllers(arg_join_controllers);
if (r < 0)
goto finish;
}
if (arg_running_as == SYSTEMD_SYSTEM) {
const char *virtualization = NULL;
log_info(PACKAGE_STRING " running in system mode. (" SYSTEMD_FEATURES ")");
detect_virtualization(&virtualization);
if (virtualization)
log_info("Detected virtualization '%s'.", virtualization);
if (in_initrd())
log_info("Running in initial RAM disk.");
} else
log_debug(PACKAGE_STRING " running in user mode. (" SYSTEMD_FEATURES ")");
if (arg_running_as == SYSTEMD_SYSTEM && !skip_setup) {
locale_setup();
if (arg_show_status || plymouth_running())
status_welcome();
#ifdef HAVE_KMOD
kmod_setup();
#endif
hostname_setup();
machine_id_setup();
loopback_setup();
test_mtab();
test_usr();
test_cgroups();
}
if (arg_running_as == SYSTEMD_SYSTEM && arg_runtime_watchdog > 0)
watchdog_set_timeout(&arg_runtime_watchdog);
if (arg_timer_slack_nsec != (nsec_t) -1)
if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
log_error("Failed to adjust timer slack: %m");
if (arg_capability_bounding_set_drop) {
r = capability_bounding_set_drop(arg_capability_bounding_set_drop, true);
if (r < 0) {
log_error("Failed to drop capability bounding set: %s", strerror(-r));
goto finish;
}
r = capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop);
if (r < 0) {
log_error("Failed to drop capability bounding set of usermode helpers: %s", strerror(-r));
goto finish;
}
}
if (arg_running_as == SYSTEMD_USER) {
/* Become reaper of our children */
if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0) {
log_warning("Failed to make us a subreaper: %m");
if (errno == EINVAL)
log_info("Perhaps the kernel version is too old (< 3.4?)");
}
}
if (arg_running_as == SYSTEMD_SYSTEM)
bump_rlimit_nofile(&saved_rlimit_nofile);
r = manager_new(arg_running_as, &m);
if (r < 0) {
log_error("Failed to allocate manager object: %s", strerror(-r));
goto finish;
}
m->confirm_spawn = arg_confirm_spawn;
m->default_std_output = arg_default_std_output;
m->default_std_error = arg_default_std_error;
m->runtime_watchdog = arg_runtime_watchdog;
m->shutdown_watchdog = arg_shutdown_watchdog;
m->userspace_timestamp = userspace_timestamp;
m->kernel_timestamp = kernel_timestamp;
m->firmware_timestamp = firmware_timestamp;
m->loader_timestamp = loader_timestamp;
m->initrd_timestamp = initrd_timestamp;
manager_set_default_rlimits(m, arg_default_rlimit);
if (arg_default_controllers)
manager_set_default_controllers(m, arg_default_controllers);
manager_set_show_status(m, arg_show_status);
/* Remember whether we should queue the default job */
queue_default_job = !serialization || arg_switched_root;
before_startup = now(CLOCK_MONOTONIC);
r = manager_startup(m, serialization, fds);
if (r < 0)
log_error("Failed to fully start up daemon: %s", strerror(-r));
/* This will close all file descriptors that were opened, but
* not claimed by any unit. */
fdset_free(fds);
if (serialization) {
fclose(serialization);
serialization = NULL;
}
if (queue_default_job) {
DBusError error;
Unit *target = NULL;
Job *default_unit_job;
dbus_error_init(&error);
log_debug("Activating default unit: %s", arg_default_unit);
r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
if (r < 0) {
log_error("Failed to load default target: %s", bus_error(&error, r));
dbus_error_free(&error);
} else if (target->load_state == UNIT_ERROR)
log_error("Failed to load default target: %s", strerror(-target->load_error));
else if (target->load_state == UNIT_MASKED)
log_error("Default target masked.");
if (!target || target->load_state != UNIT_LOADED) {
log_info("Trying to load rescue target...");
r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
if (r < 0) {
log_error("Failed to load rescue target: %s", bus_error(&error, r));
dbus_error_free(&error);
goto finish;
} else if (target->load_state == UNIT_ERROR) {
log_error("Failed to load rescue target: %s", strerror(-target->load_error));
goto finish;
} else if (target->load_state == UNIT_MASKED) {
log_error("Rescue target masked.");
goto finish;
}
}
assert(target->load_state == UNIT_LOADED);
if (arg_action == ACTION_TEST) {
printf("-> By units:\n");
manager_dump_units(m, stdout, "\t");
}
r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, false, &error, &default_unit_job);
if (r == -EPERM) {
log_debug("Default target could not be isolated, starting instead: %s", bus_error(&error, r));
dbus_error_free(&error);
r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
if (r < 0) {
log_error("Failed to start default target: %s", bus_error(&error, r));
dbus_error_free(&error);
goto finish;
}
} else if (r < 0) {
log_error("Failed to isolate default target: %s", bus_error(&error, r));
dbus_error_free(&error);
goto finish;
}
m->default_unit_job_id = default_unit_job->id;
after_startup = now(CLOCK_MONOTONIC);
log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
"Loaded units and determined initial transaction in %s.",
format_timespan(timespan, sizeof(timespan), after_startup - before_startup, 0));
if (arg_action == ACTION_TEST) {
printf("-> By jobs:\n");
manager_dump_jobs(m, stdout, "\t");
retval = EXIT_SUCCESS;
goto finish;
}
}
for (;;) {
r = manager_loop(m);
if (r < 0) {
log_error("Failed to run mainloop: %s", strerror(-r));
goto finish;
}
switch (m->exit_code) {
case MANAGER_EXIT:
retval = EXIT_SUCCESS;
log_debug("Exit.");
goto finish;
case MANAGER_RELOAD:
log_info("Reloading.");
r = manager_reload(m);
if (r < 0)
log_error("Failed to reload: %s", strerror(-r));
break;
case MANAGER_REEXECUTE:
if (prepare_reexecute(m, &serialization, &fds, false) < 0)
goto finish;
reexecute = true;
log_notice("Reexecuting.");
goto finish;
case MANAGER_SWITCH_ROOT:
/* Steal the switch root parameters */
switch_root_dir = m->switch_root;
switch_root_init = m->switch_root_init;
m->switch_root = m->switch_root_init = NULL;
if (!switch_root_init)
if (prepare_reexecute(m, &serialization, &fds, true) < 0)
goto finish;
reexecute = true;
log_notice("Switching root.");
goto finish;
case MANAGER_REBOOT:
case MANAGER_POWEROFF:
case MANAGER_HALT:
case MANAGER_KEXEC: {
static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
[MANAGER_REBOOT] = "reboot",
[MANAGER_POWEROFF] = "poweroff",
[MANAGER_HALT] = "halt",
[MANAGER_KEXEC] = "kexec"
};
assert_se(shutdown_verb = table[m->exit_code]);
arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT;
log_notice("Shutting down.");
goto finish;
}
default:
assert_not_reached("Unknown exit code.");
}
}
finish:
if (m)
manager_free(m);
for (j = 0; j < RLIMIT_NLIMITS; j++)
free(arg_default_rlimit[j]);
free(arg_default_unit);
strv_free(arg_default_controllers);
free_join_controllers();
dbus_shutdown();
label_finish();
if (reexecute) {
const char **args;
unsigned i, args_size;
/* Close and disarm the watchdog, so that the new
* instance can reinitialize it, but doesn't get
* rebooted while we do that */
watchdog_close(true);
/* Reset the RLIMIT_NOFILE to the kernel default, so
* that the new systemd can pass the kernel default to
* its child processes */
if (saved_rlimit_nofile.rlim_cur > 0)
setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile);
if (switch_root_dir) {
/* Kill all remaining processes from the
* initrd, but don't wait for them, so that we
* can handle the SIGCHLD for them after
* deserializing. */
broadcast_signal(SIGTERM, false);
/* And switch root */
r = switch_root(switch_root_dir);
if (r < 0)
log_error("Failed to switch root, ignoring: %s", strerror(-r));
}
args_size = MAX(6, argc+1);
args = newa(const char*, args_size);
if (!switch_root_init) {
char sfd[16];
/* First try to spawn ourselves with the right
* path, and with full serialization. We do
* this only if the user didn't specify an
* explicit init to spawn. */
assert(serialization);
assert(fds);
snprintf(sfd, sizeof(sfd), "%i", fileno(serialization));
char_array_0(sfd);
i = 0;
args[i++] = SYSTEMD_BINARY_PATH;
if (switch_root_dir)
args[i++] = "--switched-root";
args[i++] = arg_running_as == SYSTEMD_SYSTEM ? "--system" : "--user";
args[i++] = "--deserialize";
args[i++] = sfd;
args[i++] = NULL;
assert(i <= args_size);
execv(args[0], (char* const*) args);
}
/* Try the fallback, if there is any, without any
* serialization. We pass the original argv[] and
* envp[]. (Well, modulo the ordering changes due to
* getopt() in argv[], and some cleanups in envp[],
* but let's hope that doesn't matter.) */
if (serialization) {
fclose(serialization);
serialization = NULL;
}
if (fds) {
fdset_free(fds);
fds = NULL;
}
/* Reopen the console */
make_console_stdio();
for (j = 1, i = 1; j < argc; j++)
args[i++] = argv[j];
args[i++] = NULL;
assert(i <= args_size);
if (switch_root_init) {
args[0] = switch_root_init;
execv(args[0], (char* const*) args);
log_warning("Failed to execute configured init, trying fallback: %m");
}
args[0] = "/sbin/init";
execv(args[0], (char* const*) args);
if (errno == ENOENT) {
log_warning("No /sbin/init, trying fallback");
args[0] = "/bin/sh";
args[1] = NULL;
execv(args[0], (char* const*) args);
log_error("Failed to execute /bin/sh, giving up: %m");
} else
log_warning("Failed to execute /sbin/init, giving up: %m");
}
if (serialization)
fclose(serialization);
if (fds)
fdset_free(fds);
if (shutdown_verb) {
const char * command_line[] = {
SYSTEMD_SHUTDOWN_BINARY_PATH,
shutdown_verb,
NULL
};
char **env_block;
if (arm_reboot_watchdog && arg_shutdown_watchdog > 0) {
char e[32];
/* If we reboot let's set the shutdown
* watchdog and tell the shutdown binary to
* repeatedly ping it */
watchdog_set_timeout(&arg_shutdown_watchdog);
watchdog_close(false);
/* Tell the binary how often to ping */
snprintf(e, sizeof(e), "WATCHDOG_USEC=%llu", (unsigned long long) arg_shutdown_watchdog);
char_array_0(e);
env_block = strv_append(environ, e);
} else {
env_block = strv_copy(environ);
watchdog_close(true);
}
execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
free(env_block);
log_error("Failed to execute shutdown binary, freezing: %m");
}
if (getpid() == 1)
freeze();
return retval;
}