| /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
| |
| /*** |
| This file is part of systemd. |
| |
| Copyright 2010 Lennart Poettering |
| |
| systemd is free software; you can redistribute it and/or modify it |
| under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| systemd is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with systemd; If not, see <http://www.gnu.org/licenses/>. |
| ***/ |
| |
| #include <dbus/dbus.h> |
| |
| #include <stdio.h> |
| #include <errno.h> |
| #include <string.h> |
| #include <unistd.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <getopt.h> |
| #include <signal.h> |
| #include <sys/wait.h> |
| #include <fcntl.h> |
| #include <sys/prctl.h> |
| |
| #include "manager.h" |
| #include "log.h" |
| #include "mount-setup.h" |
| #include "hostname-setup.h" |
| #include "loopback-setup.h" |
| #include "kmod-setup.h" |
| #include "locale-setup.h" |
| #include "selinux-setup.h" |
| #include "machine-id-setup.h" |
| #include "load-fragment.h" |
| #include "fdset.h" |
| #include "special.h" |
| #include "conf-parser.h" |
| #include "bus-errors.h" |
| #include "missing.h" |
| #include "label.h" |
| #include "build.h" |
| #include "strv.h" |
| #include "def.h" |
| |
| static enum { |
| ACTION_RUN, |
| ACTION_HELP, |
| ACTION_TEST, |
| ACTION_DUMP_CONFIGURATION_ITEMS, |
| ACTION_DONE |
| } arg_action = ACTION_RUN; |
| |
| static char *arg_default_unit = NULL; |
| static ManagerRunningAs arg_running_as = _MANAGER_RUNNING_AS_INVALID; |
| |
| static bool arg_dump_core = true; |
| static bool arg_crash_shell = false; |
| static int arg_crash_chvt = -1; |
| static bool arg_confirm_spawn = false; |
| static bool arg_show_status = true; |
| #ifdef HAVE_SYSV_COMPAT |
| static bool arg_sysv_console = true; |
| #endif |
| static bool arg_mount_auto = true; |
| static bool arg_swap_auto = true; |
| static char **arg_default_controllers = NULL; |
| static ExecOutput arg_default_std_output = EXEC_OUTPUT_INHERIT; |
| static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT; |
| |
| static FILE* serialization = NULL; |
| |
| static void nop_handler(int sig) { |
| } |
| |
| _noreturn_ static void crash(int sig) { |
| |
| if (!arg_dump_core) |
| log_error("Caught <%s>, not dumping core.", signal_to_string(sig)); |
| else { |
| struct sigaction sa; |
| pid_t pid; |
| |
| /* We want to wait for the core process, hence let's enable SIGCHLD */ |
| zero(sa); |
| sa.sa_handler = nop_handler; |
| sa.sa_flags = SA_NOCLDSTOP|SA_RESTART; |
| assert_se(sigaction(SIGCHLD, &sa, NULL) == 0); |
| |
| if ((pid = fork()) < 0) |
| log_error("Caught <%s>, cannot fork for core dump: %s", signal_to_string(sig), strerror(errno)); |
| |
| else if (pid == 0) { |
| struct rlimit rl; |
| |
| /* Enable default signal handler for core dump */ |
| zero(sa); |
| sa.sa_handler = SIG_DFL; |
| assert_se(sigaction(sig, &sa, NULL) == 0); |
| |
| /* Don't limit the core dump size */ |
| zero(rl); |
| rl.rlim_cur = RLIM_INFINITY; |
| rl.rlim_max = RLIM_INFINITY; |
| setrlimit(RLIMIT_CORE, &rl); |
| |
| /* Just to be sure... */ |
| assert_se(chdir("/") == 0); |
| |
| /* Raise the signal again */ |
| raise(sig); |
| |
| assert_not_reached("We shouldn't be here..."); |
| _exit(1); |
| |
| } else { |
| siginfo_t status; |
| int r; |
| |
| /* Order things nicely. */ |
| if ((r = wait_for_terminate(pid, &status)) < 0) |
| log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig), strerror(-r)); |
| else if (status.si_code != CLD_DUMPED) |
| log_error("Caught <%s>, core dump failed.", signal_to_string(sig)); |
| else |
| log_error("Caught <%s>, dumped core as pid %lu.", signal_to_string(sig), (unsigned long) pid); |
| } |
| } |
| |
| if (arg_crash_chvt) |
| chvt(arg_crash_chvt); |
| |
| if (arg_crash_shell) { |
| struct sigaction sa; |
| pid_t pid; |
| |
| log_info("Executing crash shell in 10s..."); |
| sleep(10); |
| |
| /* Let the kernel reap children for us */ |
| zero(sa); |
| sa.sa_handler = SIG_IGN; |
| sa.sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART; |
| assert_se(sigaction(SIGCHLD, &sa, NULL) == 0); |
| |
| if ((pid = fork()) < 0) |
| log_error("Failed to fork off crash shell: %s", strerror(errno)); |
| else if (pid == 0) { |
| int fd, r; |
| |
| if ((fd = acquire_terminal("/dev/console", false, true, true)) < 0) |
| log_error("Failed to acquire terminal: %s", strerror(-fd)); |
| else if ((r = make_stdio(fd)) < 0) |
| log_error("Failed to duplicate terminal fd: %s", strerror(-r)); |
| |
| execl("/bin/sh", "/bin/sh", NULL); |
| |
| log_error("execl() failed: %s", strerror(errno)); |
| _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; |
| |
| zero(sa); |
| |
| sa.sa_handler = crash; |
| sa.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; |
| |
| if ((tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC)) < 0) { |
| log_error("Failed to open /dev/console: %s", strerror(-tty_fd)); |
| return -tty_fd; |
| } |
| |
| if ((r = reset_terminal_fd(tty_fd)) < 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); |
| |
| if (!(c = strdup(u))) |
| 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=")) |
| return set_default_unit(word + 13); |
| |
| 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; |
| #ifdef HAVE_SYSV_COMPAT |
| } else if (startswith(word, "systemd.sysv_console=")) { |
| int r; |
| |
| if ((r = parse_boolean(word + 21)) < 0) |
| log_warning("Failed to parse SysV console switch %s, Ignoring.", word + 20); |
| else |
| arg_sysv_console = r; |
| #endif |
| |
| } else if (startswith(word, "systemd.")) { |
| |
| log_warning("Unknown kernel switch %s. Ignoring.", word); |
| |
| log_info("Supported kernel switches:\n" |
| "systemd.unit=UNIT Default unit to start\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" |
| #ifdef HAVE_SYSV_COMPAT |
| "systemd.sysv_console=0|1 Connect output of SysV scripts to console\n" |
| #endif |
| "systemd.log_target=console|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\n" |
| " Set default log output for services\n" |
| "systemd.default_standard_error=null|tty|syslog|syslog+console|kmsg|kmsg+console\n" |
| " Set default log error output for services\n"); |
| |
| } else if (streq(word, "quiet")) { |
| arg_show_status = false; |
| #ifdef HAVE_SYSV_COMPAT |
| arg_sysv_console = false; |
| #endif |
| } else { |
| 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; |
| } |
| |
| static int config_parse_level( |
| const char *filename, |
| unsigned line, |
| const char *section, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| |
| log_set_max_level_from_string(rvalue); |
| return 0; |
| } |
| |
| static int config_parse_target( |
| const char *filename, |
| unsigned line, |
| const char *section, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| |
| log_set_target_from_string(rvalue); |
| return 0; |
| } |
| |
| static int config_parse_color( |
| const char *filename, |
| unsigned line, |
| const char *section, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| |
| log_show_color_from_string(rvalue); |
| return 0; |
| } |
| |
| static int config_parse_location( |
| const char *filename, |
| unsigned line, |
| const char *section, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| |
| log_show_location_from_string(rvalue); |
| return 0; |
| } |
| |
| static int config_parse_cpu_affinity( |
| 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 -ENOMEM; |
| |
| r = safe_atou(t, &cpu); |
| free(t); |
| |
| if (!c) |
| if (!(c = cpu_set_malloc(&ncpus))) |
| return -ENOMEM; |
| |
| if (r < 0 || cpu >= ncpus) { |
| log_error("[%s:%u] Failed to parse CPU affinity: %s", filename, line, 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("Failed to set CPU affinity: %m"); |
| |
| CPU_FREE(c); |
| } |
| |
| return 0; |
| } |
| |
| static DEFINE_CONFIG_PARSE_ENUM(config_parse_output, exec_output, ExecOutput, "Failed to parse output specifier"); |
| |
| static int parse_config_file(void) { |
| |
| const ConfigItem items[] = { |
| { "LogLevel", config_parse_level, 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" }, |
| #ifdef HAVE_SYSV_COMPAT |
| { "SysVConsole", config_parse_bool, 0, &arg_sysv_console, "Manager" }, |
| #endif |
| { "CrashChVT", config_parse_int, 0, &arg_crash_chvt, "Manager" }, |
| { "CPUAffinity", config_parse_cpu_affinity, 0, NULL, "Manager" }, |
| { "MountAuto", config_parse_bool, 0, &arg_mount_auto, "Manager" }, |
| { "SwapAuto", config_parse_bool, 0, &arg_swap_auto, "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" }, |
| { NULL, NULL, 0, NULL, NULL } |
| }; |
| |
| static const char * const sections[] = { |
| "Manager", |
| NULL |
| }; |
| |
| FILE *f; |
| const char *fn; |
| int r; |
| |
| fn = arg_running_as == MANAGER_SYSTEM ? SYSTEM_CONFIG_FILE : USER_CONFIG_FILE; |
| |
| if (!(f = fopen(fn, "re"))) { |
| if (errno == ENOENT) |
| return 0; |
| |
| log_warning("Failed to open configuration file '%s': %m", fn); |
| return 0; |
| } |
| |
| if ((r = config_parse(fn, f, sections, items, false, NULL)) < 0) |
| log_warning("Failed to parse configuration file: %s", strerror(-r)); |
| |
| fclose(f); |
| |
| return 0; |
| } |
| |
| static int parse_proc_cmdline(void) { |
| char *line, *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; |
| |
| 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_USER, |
| 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, |
| 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' }, |
| { "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 }, |
| #ifdef HAVE_SYSV_COMPAT |
| { "sysv-console", optional_argument, NULL, ARG_SYSV_CONSOLE }, |
| #endif |
| { "deserialize", required_argument, NULL, ARG_DESERIALIZE }, |
| { "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 = MANAGER_SYSTEM; |
| break; |
| |
| case ARG_USER: |
| arg_running_as = MANAGER_USER; |
| 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; |
| #ifdef HAVE_SYSV_COMPAT |
| 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; |
| #endif |
| |
| 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 '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) |
| 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 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" |
| #ifdef HAVE_SYSV_COMPAT |
| " --sysv-console[=0|1] Connect output of SysV scripts to console\n" |
| #endif |
| " --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" |
| " --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 prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds) { |
| 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 ++; |
| |
| if ((r = manager_open_serialization(m, &f)) < 0) { |
| log_error("Failed to create serialization file: %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; |
| } |
| |
| static struct dual_timestamp* parse_initrd_timestamp(struct dual_timestamp *t) { |
| const char *e; |
| unsigned long long a, b; |
| |
| assert(t); |
| |
| if (!(e = getenv("RD_TIMESTAMP"))) |
| 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." ); |
| |
| sleep(10); |
| } |
| |
| int main(int argc, char *argv[]) { |
| Manager *m = NULL; |
| int r, retval = EXIT_FAILURE; |
| FDSet *fds = NULL; |
| bool reexecute = false; |
| const char *shutdown_verb = NULL; |
| dual_timestamp initrd_timestamp = { 0ULL, 0ULL }; |
| char systemd[] = "systemd"; |
| |
| 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; |
| } |
| |
| /* 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); |
| log_show_location(false); |
| log_set_max_level(LOG_INFO); |
| |
| if (getpid() == 1) { |
| arg_running_as = MANAGER_SYSTEM; |
| log_set_target(detect_container(NULL) > 0 ? LOG_TARGET_CONSOLE : LOG_TARGET_SYSLOG_OR_KMSG); |
| |
| /* This might actually not return, but cause a |
| * reexecution */ |
| if (selinux_setup(argv) < 0) |
| goto finish; |
| |
| if (label_init() < 0) |
| goto finish; |
| |
| if (hwclock_is_localtime() > 0) { |
| int min; |
| |
| min = hwclock_apply_localtime_delta(); |
| if (min < 0) |
| log_error("Failed to apply local time delta: %s", strerror(-min)); |
| else |
| log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min); |
| } |
| } else { |
| arg_running_as = MANAGER_USER; |
| log_set_target(LOG_TARGET_AUTO); |
| } |
| |
| 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_TEST && geteuid() == 0) { |
| log_error("Don't run test mode as root."); |
| goto finish; |
| } |
| |
| if (arg_running_as == MANAGER_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_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); |
| |
| /* 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); |
| |
| if (arg_running_as == MANAGER_SYSTEM) { |
| /* Parse the data passed to us by the initrd and unset it */ |
| parse_initrd_timestamp(&initrd_timestamp); |
| filter_environ("RD_"); |
| |
| /* Unset some environment variables passed in from the |
| * kernel that don't really make sense for us. */ |
| unsetenv("HOME"); |
| unsetenv("TERM"); |
| |
| /* 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 == 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_full(arg_running_as == MANAGER_SYSTEM ? LOG_INFO : LOG_DEBUG, |
| PACKAGE_STRING " running in %s mode. (" SYSTEMD_FEATURES "; " DISTRIBUTION ")", manager_running_as_to_string(arg_running_as)); |
| |
| if (arg_running_as == MANAGER_SYSTEM && !serialization) { |
| locale_setup(); |
| |
| if (arg_show_status || plymouth_running()) |
| status_welcome(); |
| |
| kmod_setup(); |
| hostname_setup(); |
| machine_id_setup(); |
| loopback_setup(); |
| |
| test_mtab(); |
| test_usr(); |
| test_cgroups(); |
| } |
| |
| 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; |
| #ifdef HAVE_SYSV_COMPAT |
| m->sysv_console = arg_sysv_console; |
| #endif |
| m->mount_auto = arg_mount_auto; |
| m->swap_auto = arg_swap_auto; |
| m->default_std_output = arg_default_std_output; |
| m->default_std_error = arg_default_std_error; |
| |
| if (dual_timestamp_is_set(&initrd_timestamp)) |
| m->initrd_timestamp = initrd_timestamp; |
| |
| if (arg_default_controllers) |
| manager_set_default_controllers(m, arg_default_controllers); |
| |
| 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; |
| Unit *target = NULL; |
| |
| 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); |
| } else if (target->meta.load_state == UNIT_ERROR) |
| log_error("Failed to load default target: %s", strerror(-target->meta.load_error)); |
| else if (target->meta.load_state == UNIT_MASKED) |
| log_error("Default target masked."); |
| |
| if (!target || target->meta.load_state != UNIT_LOADED) { |
| 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; |
| } else if (target->meta.load_state == UNIT_ERROR) { |
| log_error("Failed to load rescue target: %s", strerror(-target->meta.load_error)); |
| goto finish; |
| } else if (target->meta.load_state == UNIT_MASKED) { |
| log_error("Rescue target masked."); |
| goto finish; |
| } |
| } |
| |
| assert(target->meta.load_state == UNIT_LOADED); |
| |
| 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_action == ACTION_TEST) { |
| printf("-> By jobs:\n"); |
| manager_dump_jobs(m, stdout, "\t"); |
| retval = EXIT_SUCCESS; |
| 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 = EXIT_SUCCESS; |
| 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; |
| |
| 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]); |
| |
| log_notice("Shutting down."); |
| goto finish; |
| } |
| |
| default: |
| assert_not_reached("Unknown exit code."); |
| } |
| } |
| |
| finish: |
| if (m) |
| manager_free(m); |
| |
| free(arg_default_unit); |
| strv_free(arg_default_controllers); |
| |
| dbus_shutdown(); |
| |
| label_finish(); |
| |
| 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++] = "--user"; |
| |
| 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"; |
| |
| #ifdef HAVE_SYSV_COMPAT |
| if (arg_sysv_console) |
| args[i++] = "--sysv-console=1"; |
| else |
| args[i++] = "--sysv-console=0"; |
| #endif |
| |
| 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 (shutdown_verb) { |
| const char * command_line[] = { |
| SYSTEMD_SHUTDOWN_BINARY_PATH, |
| shutdown_verb, |
| NULL |
| }; |
| |
| execv(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line); |
| log_error("Failed to execute shutdown binary, freezing: %m"); |
| } |
| |
| if (getpid() == 1) |
| freeze(); |
| |
| return retval; |
| } |