1194 lines
40 KiB
C
1194 lines
40 KiB
C
/*-*- Mode: C; c-basic-offset: 8 -*-*/
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <dbus/dbus.h>
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#include <stdio.h>
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#include <errno.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <getopt.h>
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#include <signal.h>
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#include <sys/wait.h>
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#include <fcntl.h>
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#include "manager.h"
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#include "log.h"
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#include "mount-setup.h"
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#include "hostname-setup.h"
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#include "loopback-setup.h"
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#include "kmod-setup.h"
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#include "modprobe-setup.h"
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#include "load-fragment.h"
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#include "fdset.h"
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#include "special.h"
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#include "conf-parser.h"
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#include "bus-errors.h"
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#include "missing.h"
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#include "label.h"
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static enum {
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ACTION_RUN,
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ACTION_HELP,
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ACTION_TEST,
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ACTION_DUMP_CONFIGURATION_ITEMS,
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ACTION_DONE
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} arg_action = ACTION_RUN;
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static char *arg_default_unit = NULL;
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static char *arg_console = NULL;
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static ManagerRunningAs arg_running_as = _MANAGER_RUNNING_AS_INVALID;
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static bool arg_dump_core = true;
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static bool arg_crash_shell = false;
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static int arg_crash_chvt = -1;
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static bool arg_confirm_spawn = false;
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static bool arg_nomodules = false;
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static bool arg_show_status = true;
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static bool arg_sysv_console = true;
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static FILE* serialization = NULL;
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_noreturn_ static void freeze(void) {
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for (;;)
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pause();
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}
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static void nop_handler(int sig) {
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}
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_noreturn_ static void crash(int sig) {
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if (!arg_dump_core)
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log_error("Caught <%s>, not dumping core.", signal_to_string(sig));
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else {
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struct sigaction sa;
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pid_t pid;
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/* We want to wait for the core process, hence let's enable SIGCHLD */
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zero(sa);
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sa.sa_handler = nop_handler;
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sa.sa_flags = SA_NOCLDSTOP|SA_RESTART;
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assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
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if ((pid = fork()) < 0)
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log_error("Caught <%s>, cannot fork for core dump: %s", signal_to_string(sig), strerror(errno));
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else if (pid == 0) {
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struct rlimit rl;
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/* Enable default signal handler for core dump */
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zero(sa);
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sa.sa_handler = SIG_DFL;
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assert_se(sigaction(sig, &sa, NULL) == 0);
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/* Don't limit the core dump size */
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zero(rl);
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rl.rlim_cur = RLIM_INFINITY;
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rl.rlim_max = RLIM_INFINITY;
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setrlimit(RLIMIT_CORE, &rl);
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/* Just to be sure... */
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assert_se(chdir("/") == 0);
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/* Raise the signal again */
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raise(sig);
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assert_not_reached("We shouldn't be here...");
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_exit(1);
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} else {
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int status;
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/* Order things nicely. */
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if (waitpid(pid, &status, 0) < 0)
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log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig), strerror(errno));
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else if (!WCOREDUMP(status))
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log_error("Caught <%s>, core dump failed.", signal_to_string(sig));
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else
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log_error("Caught <%s>, dumped core as pid %lu.", signal_to_string(sig), (unsigned long) pid);
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}
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}
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if (arg_crash_chvt)
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chvt(arg_crash_chvt);
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if (arg_crash_shell) {
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struct sigaction sa;
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pid_t pid;
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log_info("Executing crash shell in 10s...");
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sleep(10);
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/* Let the kernel reap children for us */
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zero(sa);
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sa.sa_handler = SIG_IGN;
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sa.sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART;
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assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
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if ((pid = fork()) < 0)
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log_error("Failed to fork off crash shell: %s", strerror(errno));
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else if (pid == 0) {
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int fd, r;
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if ((fd = acquire_terminal("/dev/console", false, true, true)) < 0)
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log_error("Failed to acquire terminal: %s", strerror(-fd));
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else if ((r = make_stdio(fd)) < 0)
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log_error("Failed to duplicate terminal fd: %s", strerror(-r));
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execl("/bin/sh", "/bin/sh", NULL);
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log_error("execl() failed: %s", strerror(errno));
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_exit(1);
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}
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log_info("Successfully spawned crash shall as pid %lu.", (unsigned long) pid);
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}
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log_info("Freezing execution.");
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freeze();
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}
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static void install_crash_handler(void) {
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struct sigaction sa;
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zero(sa);
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sa.sa_handler = crash;
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sa.sa_flags = SA_NODEFER;
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sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
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}
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static int make_null_stdio(void) {
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int null_fd, r;
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if ((null_fd = open("/dev/null", O_RDWR|O_NOCTTY)) < 0) {
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log_error("Failed to open /dev/null: %m");
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return -errno;
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}
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if ((r = make_stdio(null_fd)) < 0)
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log_warning("Failed to dup2() device: %s", strerror(-r));
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return r;
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}
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static int console_setup(bool do_reset) {
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int tty_fd, r;
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/* If we are init, we connect stdin/stdout/stderr to /dev/null
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* and make sure we don't have a controlling tty. */
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release_terminal();
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if (!do_reset)
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return 0;
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if ((tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC)) < 0) {
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log_error("Failed to open /dev/console: %s", strerror(-tty_fd));
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return -tty_fd;
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}
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if ((r = reset_terminal(tty_fd)) < 0)
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log_error("Failed to reset /dev/console: %s", strerror(-r));
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close_nointr_nofail(tty_fd);
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return r;
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}
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static int set_default_unit(const char *u) {
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char *c;
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assert(u);
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if (!(c = strdup(u)))
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return -ENOMEM;
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free(arg_default_unit);
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arg_default_unit = c;
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return 0;
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}
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static int parse_proc_cmdline_word(const char *word) {
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static const char * const rlmap[] = {
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"single", SPECIAL_RESCUE_TARGET,
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"-s", SPECIAL_RESCUE_TARGET,
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"s", SPECIAL_RESCUE_TARGET,
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"S", SPECIAL_RESCUE_TARGET,
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"1", SPECIAL_RESCUE_TARGET,
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"2", SPECIAL_RUNLEVEL2_TARGET,
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"3", SPECIAL_RUNLEVEL3_TARGET,
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"4", SPECIAL_RUNLEVEL4_TARGET,
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"5", SPECIAL_RUNLEVEL5_TARGET
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};
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if (startswith(word, "systemd.unit="))
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return set_default_unit(word + 13);
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else if (startswith(word, "systemd.log_target=")) {
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if (log_set_target_from_string(word + 19) < 0)
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log_warning("Failed to parse log target %s. Ignoring.", word + 19);
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} else if (startswith(word, "systemd.log_level=")) {
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if (log_set_max_level_from_string(word + 18) < 0)
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log_warning("Failed to parse log level %s. Ignoring.", word + 18);
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} else if (startswith(word, "systemd.log_color=")) {
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if (log_show_color_from_string(word + 18) < 0)
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log_warning("Failed to parse log color setting %s. Ignoring.", word + 18);
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} else if (startswith(word, "systemd.log_location=")) {
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if (log_show_location_from_string(word + 21) < 0)
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log_warning("Failed to parse log location setting %s. Ignoring.", word + 21);
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} else if (startswith(word, "systemd.dump_core=")) {
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int r;
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if ((r = parse_boolean(word + 18)) < 0)
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log_warning("Failed to parse dump core switch %s, Ignoring.", word + 18);
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else
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arg_dump_core = r;
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} else if (startswith(word, "systemd.crash_shell=")) {
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int r;
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if ((r = parse_boolean(word + 20)) < 0)
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log_warning("Failed to parse crash shell switch %s, Ignoring.", word + 20);
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else
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arg_crash_shell = r;
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} else if (startswith(word, "systemd.confirm_spawn=")) {
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int r;
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if ((r = parse_boolean(word + 22)) < 0)
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log_warning("Failed to parse confirm spawn switch %s, Ignoring.", word + 22);
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else
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arg_confirm_spawn = r;
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} else if (startswith(word, "systemd.crash_chvt=")) {
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int k;
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if (safe_atoi(word + 19, &k) < 0)
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log_warning("Failed to parse crash chvt switch %s, Ignoring.", word + 19);
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else
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arg_crash_chvt = k;
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} else if (startswith(word, "systemd.show_status=")) {
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int r;
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if ((r = parse_boolean(word + 20)) < 0)
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log_warning("Failed to parse show status switch %s, Ignoring.", word + 20);
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else
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arg_show_status = r;
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} else if (startswith(word, "systemd.sysv_console=")) {
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int r;
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if ((r = parse_boolean(word + 21)) < 0)
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log_warning("Failed to parse SysV console switch %s, Ignoring.", word + 20);
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else
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arg_sysv_console = r;
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} else if (startswith(word, "systemd.")) {
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log_warning("Unknown kernel switch %s. Ignoring.", word);
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log_info("Supported kernel switches:\n"
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"systemd.unit=UNIT Default unit to start\n"
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"systemd.dump_core=0|1 Dump core on crash\n"
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"systemd.crash_shell=0|1 Run shell on crash\n"
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"systemd.crash_chvt=N Change to VT #N on crash\n"
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"systemd.confirm_spawn=0|1 Confirm every process spawn\n"
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"systemd.show_status=0|1 Show status updates on the console during bootup\n"
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"systemd.sysv_console=0|1 Connect output of SysV scripts to console\n"
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"systemd.log_target=console|kmsg|syslog|syslog-org-kmsg|null\n"
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" Log target\n"
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"systemd.log_level=LEVEL Log level\n"
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"systemd.log_color=0|1 Highlight important log messages\n"
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"systemd.log_location=0|1 Include code location in log messages\n");
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} else if (streq(word, "nomodules"))
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arg_nomodules = true;
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else if (startswith(word, "console=")) {
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const char *k;
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size_t l;
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char *w = NULL;
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k = word + 8;
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l = strcspn(k, ",");
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if (l < 4 ||
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!startswith(k, "tty") ||
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k[3+strspn(k+3, "0123456789")] != 0) {
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if (!(w = strndup(k, l)))
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return -ENOMEM;
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}
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free(arg_console);
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arg_console = w;
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} else if (streq(word, "quiet")) {
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arg_show_status = false;
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arg_sysv_console = false;
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} else {
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unsigned i;
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/* SysV compatibility */
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for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
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if (streq(word, rlmap[i]))
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return set_default_unit(rlmap[i+1]);
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}
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return 0;
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}
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static int config_parse_level(
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const char *filename,
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unsigned line,
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const char *section,
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const char *lvalue,
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const char *rvalue,
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void *data,
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void *userdata) {
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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log_set_max_level_from_string(rvalue);
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return 0;
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}
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static int config_parse_target(
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const char *filename,
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unsigned line,
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const char *section,
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const char *lvalue,
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const char *rvalue,
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void *data,
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void *userdata) {
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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log_set_target_from_string(rvalue);
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return 0;
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}
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static int config_parse_color(
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const char *filename,
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unsigned line,
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const char *section,
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const char *lvalue,
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const char *rvalue,
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void *data,
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void *userdata) {
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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log_show_color_from_string(rvalue);
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return 0;
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}
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static int config_parse_location(
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const char *filename,
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unsigned line,
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const char *section,
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const char *lvalue,
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const char *rvalue,
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void *data,
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void *userdata) {
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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log_show_location_from_string(rvalue);
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return 0;
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}
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static int config_parse_cpu_affinity(
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const char *filename,
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unsigned line,
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const char *section,
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const char *lvalue,
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const char *rvalue,
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void *data,
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void *userdata) {
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char *w;
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size_t l;
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char *state;
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cpu_set_t *c = NULL;
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unsigned ncpus = 0;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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FOREACH_WORD_QUOTED(w, l, rvalue, state) {
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char *t;
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int r;
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unsigned cpu;
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if (!(t = strndup(w, l)))
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return -ENOMEM;
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r = safe_atou(t, &cpu);
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free(t);
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if (!c)
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if (!(c = cpu_set_malloc(&ncpus)))
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return -ENOMEM;
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if (r < 0 || cpu >= ncpus) {
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log_error("[%s:%u] Failed to parse CPU affinity: %s", filename, line, rvalue);
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CPU_FREE(c);
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return -EBADMSG;
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}
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CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
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}
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if (c) {
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if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
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log_warning("Failed to set CPU affinity: %m");
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CPU_FREE(c);
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}
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return 0;
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}
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static int parse_config_file(void) {
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const ConfigItem items[] = {
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{ "LogLevel", config_parse_level, NULL, "Manager" },
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{ "LogTarget", config_parse_target, NULL, "Manager" },
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{ "LogColor", config_parse_color, NULL, "Manager" },
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{ "LogLocation", config_parse_location, NULL, "Manager" },
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{ "DumpCore", config_parse_bool, &arg_dump_core, "Manager" },
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{ "CrashShell", config_parse_bool, &arg_crash_shell, "Manager" },
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{ "ShowStatus", config_parse_bool, &arg_show_status, "Manager" },
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{ "SysVConsole", config_parse_bool, &arg_sysv_console,"Manager" },
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{ "CrashChVT", config_parse_int, &arg_crash_chvt, "Manager" },
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{ "CPUAffinity", config_parse_cpu_affinity, NULL, "Manager" },
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{ NULL, NULL, NULL, NULL }
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};
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static const char * const sections[] = {
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"Manager",
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NULL
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};
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FILE *f;
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const char *fn;
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int r;
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fn = arg_running_as == MANAGER_SYSTEM ? SYSTEM_CONFIG_FILE : SESSION_CONFIG_FILE;
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if (!(f = fopen(fn, "re"))) {
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if (errno == ENOENT)
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return 0;
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log_warning("Failed to open configuration file '%s': %m", fn);
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return 0;
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}
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if ((r = config_parse(fn, f, sections, items, false, NULL)) < 0)
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log_warning("Failed to parse configuration file: %s", strerror(-r));
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fclose(f);
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return 0;
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}
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|
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static int parse_proc_cmdline(void) {
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char *line;
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int r;
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char *w;
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size_t l;
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char *state;
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if ((r = read_one_line_file("/proc/cmdline", &line)) < 0) {
|
|
log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
|
|
return 0;
|
|
}
|
|
|
|
FOREACH_WORD_QUOTED(w, l, line, state) {
|
|
char *word;
|
|
|
|
if (!(word = strndup(w, l))) {
|
|
r = -ENOMEM;
|
|
goto finish;
|
|
}
|
|
|
|
r = parse_proc_cmdline_word(word);
|
|
free(word);
|
|
|
|
if (r < 0)
|
|
goto finish;
|
|
}
|
|
|
|
r = 0;
|
|
|
|
finish:
|
|
free(line);
|
|
return r;
|
|
}
|
|
|
|
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_SESSION,
|
|
ARG_TEST,
|
|
ARG_DUMP_CONFIGURATION_ITEMS,
|
|
ARG_DUMP_CORE,
|
|
ARG_CRASH_SHELL,
|
|
ARG_CONFIRM_SPAWN,
|
|
ARG_SHOW_STATUS,
|
|
ARG_SYSV_CONSOLE,
|
|
ARG_DESERIALIZE,
|
|
ARG_INTROSPECT
|
|
};
|
|
|
|
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 },
|
|
{ "session", no_argument, NULL, ARG_SESSION },
|
|
{ "test", no_argument, NULL, ARG_TEST },
|
|
{ "help", no_argument, NULL, 'h' },
|
|
{ "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
|
|
{ "dump-core", no_argument, NULL, ARG_DUMP_CORE },
|
|
{ "crash-shell", no_argument, NULL, ARG_CRASH_SHELL },
|
|
{ "confirm-spawn", no_argument, NULL, ARG_CONFIRM_SPAWN },
|
|
{ "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
|
|
{ "sysv-console", optional_argument, NULL, ARG_SYSV_CONSOLE },
|
|
{ "deserialize", required_argument, NULL, ARG_DESERIALIZE },
|
|
{ "introspect", optional_argument, NULL, ARG_INTROSPECT },
|
|
{ NULL, 0, NULL, 0 }
|
|
};
|
|
|
|
int c, r;
|
|
|
|
assert(argc >= 1);
|
|
assert(argv);
|
|
|
|
while ((c = getopt_long(argc, argv, "hD", 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_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 = MANAGER_SYSTEM;
|
|
break;
|
|
|
|
case ARG_SESSION:
|
|
arg_running_as = MANAGER_SESSION;
|
|
break;
|
|
|
|
case ARG_TEST:
|
|
arg_action = ACTION_TEST;
|
|
break;
|
|
|
|
case ARG_DUMP_CONFIGURATION_ITEMS:
|
|
arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
|
|
break;
|
|
|
|
case ARG_DUMP_CORE:
|
|
arg_dump_core = true;
|
|
break;
|
|
|
|
case ARG_CRASH_SHELL:
|
|
arg_crash_shell = true;
|
|
break;
|
|
|
|
case ARG_CONFIRM_SPAWN:
|
|
arg_confirm_spawn = true;
|
|
break;
|
|
|
|
case ARG_SHOW_STATUS:
|
|
|
|
if (optarg) {
|
|
if ((r = parse_boolean(optarg)) < 0) {
|
|
log_error("Failed to show status boolean %s.", optarg);
|
|
return r;
|
|
}
|
|
arg_show_status = r;
|
|
} else
|
|
arg_show_status = true;
|
|
break;
|
|
|
|
case ARG_SYSV_CONSOLE:
|
|
|
|
if (optarg) {
|
|
if ((r = parse_boolean(optarg)) < 0) {
|
|
log_error("Failed to SysV console boolean %s.", optarg);
|
|
return r;
|
|
}
|
|
arg_sysv_console = r;
|
|
} else
|
|
arg_sysv_console = true;
|
|
break;
|
|
|
|
case ARG_DESERIALIZE: {
|
|
int fd;
|
|
FILE *f;
|
|
|
|
if ((r = safe_atoi(optarg, &fd)) < 0 || fd < 0) {
|
|
log_error("Failed to parse deserialize option %s.", optarg);
|
|
return r;
|
|
}
|
|
|
|
if (!(f = fdopen(fd, "r"))) {
|
|
log_error("Failed to open serialization fd: %m");
|
|
return r;
|
|
}
|
|
|
|
if (serialization)
|
|
fclose(serialization);
|
|
|
|
serialization = f;
|
|
|
|
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 '?':
|
|
return -EINVAL;
|
|
|
|
default:
|
|
log_error("Unknown option code %c", c);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* PID 1 will get the kernel arguments as parameters, which we
|
|
* ignore and unconditionally read from
|
|
* /proc/cmdline. However, we need to ignore those arguments
|
|
* here. */
|
|
if (arg_running_as != MANAGER_SYSTEM && optind < argc) {
|
|
log_error("Excess arguments.");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int help(void) {
|
|
|
|
printf("%s [OPTIONS...]\n\n"
|
|
"Starts up and maintains the system or a session.\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"
|
|
" --session Run a session instance\n"
|
|
" --dump-core Dump core on crash\n"
|
|
" --crash-shell Run shell on crash\n"
|
|
" --confirm-spawn Ask for confirmation when spawning processes\n"
|
|
" --show-status[=0|1] Show status updates on the console during bootup\n"
|
|
" --sysv-console[=0|1] Connect output of SysV scripts to console\n"
|
|
" --log-target=TARGET Set log target (console, syslog, 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",
|
|
program_invocation_short_name);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds) {
|
|
FILE *f = NULL;
|
|
FDSet *fds = NULL;
|
|
int r;
|
|
|
|
assert(m);
|
|
assert(_f);
|
|
assert(_fds);
|
|
|
|
if ((r = manager_open_serialization(m, &f)) < 0) {
|
|
log_error("Failed to create serialization faile: %s", strerror(-r));
|
|
goto fail;
|
|
}
|
|
|
|
if (!(fds = fdset_new())) {
|
|
r = -ENOMEM;
|
|
log_error("Failed to allocate fd set: %s", strerror(-r));
|
|
goto fail;
|
|
}
|
|
|
|
if ((r = manager_serialize(m, f, fds)) < 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;
|
|
}
|
|
|
|
if ((r = fd_cloexec(fileno(f), false)) < 0) {
|
|
log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
|
|
goto fail;
|
|
}
|
|
|
|
if ((r = fdset_cloexec(fds, false)) < 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;
|
|
}
|
|
|
|
int main(int argc, char *argv[]) {
|
|
Manager *m = NULL;
|
|
Unit *target = NULL;
|
|
int r, retval = 1;
|
|
FDSet *fds = NULL;
|
|
bool reexecute = false;
|
|
|
|
if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
|
|
/* This is compatbility 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;
|
|
}
|
|
|
|
log_show_color(isatty(STDERR_FILENO) > 0);
|
|
log_show_location(false);
|
|
log_set_max_level(LOG_INFO);
|
|
|
|
if (getpid() == 1) {
|
|
arg_running_as = MANAGER_SYSTEM;
|
|
log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
|
|
|
|
if (label_init() < 0)
|
|
goto finish;
|
|
} else {
|
|
arg_running_as = MANAGER_SESSION;
|
|
log_set_target(LOG_TARGET_CONSOLE);
|
|
}
|
|
|
|
if (set_default_unit(SPECIAL_DEFAULT_TARGET) < 0)
|
|
goto finish;
|
|
|
|
/* Mount /proc, /sys and friends, so that /proc/cmdline and
|
|
* /proc/$PID/fd is available. */
|
|
if (geteuid() == 0 && !getenv("SYSTEMD_SKIP_API_MOUNTS"))
|
|
if (mount_setup() < 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 == MANAGER_SYSTEM)
|
|
if (parse_proc_cmdline() < 0)
|
|
goto finish;
|
|
|
|
log_parse_environment();
|
|
|
|
if (parse_argv(argc, argv) < 0)
|
|
goto finish;
|
|
|
|
if (arg_action == ACTION_HELP) {
|
|
retval = help();
|
|
goto finish;
|
|
} else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
|
|
unit_dump_config_items(stdout);
|
|
retval = 0;
|
|
goto finish;
|
|
} else if (arg_action == ACTION_DONE) {
|
|
retval = 0;
|
|
goto finish;
|
|
}
|
|
|
|
assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
|
|
|
|
/* Remember open file descriptors for later deserialization */
|
|
if (serialization) {
|
|
if ((r = fdset_new_fill(&fds)) < 0) {
|
|
log_error("Failed to allocate fd set: %s", strerror(-r));
|
|
goto finish;
|
|
}
|
|
|
|
assert_se(fdset_remove(fds, fileno(serialization)) >= 0);
|
|
} else
|
|
close_all_fds(NULL, 0);
|
|
|
|
/* Set up PATH unless it is already set */
|
|
setenv("PATH",
|
|
"/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
|
|
arg_running_as == MANAGER_SYSTEM);
|
|
|
|
/* Move out of the way, so that we won't block unmounts */
|
|
assert_se(chdir("/") == 0);
|
|
|
|
if (arg_running_as == MANAGER_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 == MANAGER_SYSTEM && arg_action == ACTION_RUN) {
|
|
console_setup(getpid() == 1 && !serialization);
|
|
make_null_stdio();
|
|
}
|
|
|
|
/* 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();
|
|
|
|
log_info(PACKAGE_STRING " running in %s mode.", manager_running_as_to_string(arg_running_as));
|
|
|
|
if (arg_running_as == MANAGER_SYSTEM) {
|
|
|
|
/* Disable nscd, to avoid deadlocks when systemd uses
|
|
* NSS and the nscd socket is maintained by us. */
|
|
nss_disable_nscd();
|
|
|
|
if (!serialization) {
|
|
if (arg_show_status)
|
|
status_welcome();
|
|
modprobe_setup(arg_nomodules);
|
|
kmod_setup();
|
|
hostname_setup();
|
|
loopback_setup();
|
|
}
|
|
}
|
|
|
|
if ((r = manager_new(arg_running_as, &m)) < 0) {
|
|
log_error("Failed to allocate manager object: %s", strerror(-r));
|
|
goto finish;
|
|
}
|
|
|
|
m->confirm_spawn = arg_confirm_spawn;
|
|
m->show_status = arg_show_status;
|
|
m->sysv_console = arg_sysv_console;
|
|
|
|
if ((r = manager_startup(m, serialization, fds)) < 0)
|
|
log_error("Failed to fully start up daemon: %s", strerror(-r));
|
|
|
|
if (fds) {
|
|
/* This will close all file descriptors that were opened, but
|
|
* not claimed by any unit. */
|
|
|
|
fdset_free(fds);
|
|
fds = NULL;
|
|
}
|
|
|
|
if (serialization) {
|
|
fclose(serialization);
|
|
serialization = NULL;
|
|
} else {
|
|
DBusError error;
|
|
|
|
dbus_error_init(&error);
|
|
|
|
log_debug("Activating default unit: %s", arg_default_unit);
|
|
|
|
if ((r = manager_load_unit(m, arg_default_unit, NULL, &error, &target)) < 0) {
|
|
log_error("Failed to load default target: %s", bus_error(&error, r));
|
|
dbus_error_free(&error);
|
|
|
|
log_info("Trying to load rescue target...");
|
|
if ((r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target)) < 0) {
|
|
log_error("Failed to load rescue target: %s", bus_error(&error, r));
|
|
dbus_error_free(&error);
|
|
goto finish;
|
|
}
|
|
}
|
|
|
|
if (arg_action == ACTION_TEST) {
|
|
printf("-> By units:\n");
|
|
manager_dump_units(m, stdout, "\t");
|
|
}
|
|
|
|
if ((r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, NULL)) < 0) {
|
|
log_error("Failed to start default target: %s", bus_error(&error, r));
|
|
dbus_error_free(&error);
|
|
goto finish;
|
|
}
|
|
|
|
if (arg_console && arg_running_as == MANAGER_SYSTEM) {
|
|
char *name;
|
|
|
|
if (asprintf(&name, "getty@%s.service", arg_console) < 0)
|
|
log_error("Out of memory while generating console getty service name.");
|
|
else {
|
|
if ((r = manager_add_job_by_name(m, JOB_START, name, JOB_FAIL, false, &error, NULL)) < 0) {
|
|
log_error("Failed to start console getty target: %s", bus_error(&error, r));
|
|
dbus_error_free(&error);
|
|
}
|
|
|
|
free(name);
|
|
}
|
|
}
|
|
|
|
if (arg_action == ACTION_TEST) {
|
|
printf("-> By jobs:\n");
|
|
manager_dump_jobs(m, stdout, "\t");
|
|
retval = 0;
|
|
goto finish;
|
|
}
|
|
}
|
|
|
|
for (;;) {
|
|
if ((r = manager_loop(m)) < 0) {
|
|
log_error("Failed to run mainloop: %s", strerror(-r));
|
|
goto finish;
|
|
}
|
|
|
|
switch (m->exit_code) {
|
|
|
|
case MANAGER_EXIT:
|
|
retval = 0;
|
|
log_debug("Exit.");
|
|
goto finish;
|
|
|
|
case MANAGER_RELOAD:
|
|
log_info("Reloading.");
|
|
if ((r = manager_reload(m)) < 0)
|
|
log_error("Failed to reload: %s", strerror(-r));
|
|
break;
|
|
|
|
case MANAGER_REEXECUTE:
|
|
if (prepare_reexecute(m, &serialization, &fds) < 0)
|
|
goto finish;
|
|
|
|
reexecute = true;
|
|
log_notice("Reexecuting.");
|
|
goto finish;
|
|
|
|
default:
|
|
assert_not_reached("Unknown exit code.");
|
|
}
|
|
}
|
|
|
|
finish:
|
|
if (m)
|
|
manager_free(m);
|
|
|
|
free(arg_default_unit);
|
|
free(arg_console);
|
|
|
|
dbus_shutdown();
|
|
|
|
if (reexecute) {
|
|
const char *args[15];
|
|
unsigned i = 0;
|
|
char sfd[16];
|
|
|
|
assert(serialization);
|
|
assert(fds);
|
|
|
|
args[i++] = SYSTEMD_BINARY_PATH;
|
|
|
|
args[i++] = "--log-level";
|
|
args[i++] = log_level_to_string(log_get_max_level());
|
|
|
|
args[i++] = "--log-target";
|
|
args[i++] = log_target_to_string(log_get_target());
|
|
|
|
if (arg_running_as == MANAGER_SYSTEM)
|
|
args[i++] = "--system";
|
|
else
|
|
args[i++] = "--session";
|
|
|
|
if (arg_dump_core)
|
|
args[i++] = "--dump-core";
|
|
|
|
if (arg_crash_shell)
|
|
args[i++] = "--crash-shell";
|
|
|
|
if (arg_confirm_spawn)
|
|
args[i++] = "--confirm-spawn";
|
|
|
|
if (arg_show_status)
|
|
args[i++] = "--show-status=1";
|
|
else
|
|
args[i++] = "--show-status=0";
|
|
|
|
if (arg_sysv_console)
|
|
args[i++] = "--sysv-console=1";
|
|
else
|
|
args[i++] = "--sysv-console=0";
|
|
|
|
snprintf(sfd, sizeof(sfd), "%i", fileno(serialization));
|
|
char_array_0(sfd);
|
|
|
|
args[i++] = "--deserialize";
|
|
args[i++] = sfd;
|
|
|
|
args[i++] = NULL;
|
|
|
|
assert(i <= ELEMENTSOF(args));
|
|
|
|
execv(args[0], (char* const*) args);
|
|
|
|
log_error("Failed to reexecute: %m");
|
|
}
|
|
|
|
if (serialization)
|
|
fclose(serialization);
|
|
|
|
if (fds)
|
|
fdset_free(fds);
|
|
|
|
if (getpid() == 1)
|
|
freeze();
|
|
|
|
label_finish();
|
|
|
|
return retval;
|
|
}
|