X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fcore%2Fmain.c;h=12af3cdd270bab97d255c3a7c7ac9d188413391b;hp=b66ae0e035f1e31c9c8207157ce41287cd01bcf3;hb=032f81645b3a60be316d7a0ed1e84443aa8737ba;hpb=bf4df7c3b6cb24918d94835cafd9dd60881c8981 diff --git a/src/core/main.c b/src/core/main.c index b66ae0e03..12af3cdd2 100644 --- a/src/core/main.c +++ b/src/core/main.c @@ -50,6 +50,8 @@ #include "watchdog.h" #include "path-util.h" #include "switch-root.h" +#include "capability.h" +#include "killall.h" #include "mount-setup.h" #include "loopback-setup.h" @@ -64,6 +66,7 @@ static enum { ACTION_RUN, ACTION_HELP, + ACTION_VERSION, ACTION_TEST, ACTION_DUMP_CONFIGURATION_ITEMS, ACTION_DONE @@ -78,9 +81,6 @@ static int arg_crash_chvt = -1; static bool arg_confirm_spawn = false; static bool arg_show_status = true; static bool arg_switched_root = false; -#ifdef HAVE_SYSV_COMPAT -static bool arg_sysv_console = true; -#endif static char **arg_default_controllers = NULL; static char ***arg_join_controllers = NULL; static ExecOutput arg_default_std_output = EXEC_OUTPUT_JOURNAL; @@ -88,6 +88,8 @@ static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT; static usec_t arg_runtime_watchdog = 0; static usec_t arg_shutdown_watchdog = 10 * USEC_PER_MINUTE; static struct rlimit *arg_default_rlimit[RLIMIT_NLIMITS] = {}; +static uint64_t arg_capability_bounding_set_drop = 0; +static nsec_t arg_timer_slack_nsec = (nsec_t) -1; static FILE* serialization = NULL; @@ -164,19 +166,14 @@ _noreturn_ static void crash(int sig) { 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)); + pid = fork(); + if (pid < 0) + log_error("Failed to fork off crash shell: %m"); 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)); - + make_console_stdio(); execl("/bin/sh", "/bin/sh", NULL); - log_error("execl() failed: %s", strerror(errno)); + log_error("execl() failed: %m"); _exit(1); } @@ -353,25 +350,17 @@ static int parse_proc_cmdline_word(const char *word) { if (!eq) { r = unsetenv(cenv); if (r < 0) - log_warning("unsetenv failed %s. Ignoring.", strerror(errno)); + log_warning("unsetenv failed %m. Ignoring."); } else { *eq = 0; r = setenv(cenv, eq + 1, 1); if (r < 0) - log_warning("setenv failed %s. Ignoring.", strerror(errno)); + log_warning("setenv failed %m. Ignoring."); } free(cenv); -#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.")) { + } else if (startswith(word, "systemd.") || + (in_initrd() && startswith(word, "rd.systemd."))) { log_warning("Unknown kernel switch %s. Ignoring.", word); @@ -383,9 +372,6 @@ static int parse_proc_cmdline_word(const char *word) { "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|journal|journal-or-kmsg|syslog|syslog-or-kmsg|null\n" " Log target\n" "systemd.log_level=LEVEL Log level\n" @@ -394,14 +380,12 @@ static int parse_proc_cmdline_word(const char *word) { "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"); + " 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")) { + } else if (streq(word, "quiet")) arg_show_status = false; -#ifdef HAVE_SYSV_COMPAT - arg_sysv_console = false; -#endif - } else { + else if (!in_initrd()) { unsigned i; /* SysV compatibility */ @@ -511,14 +495,14 @@ static int config_parse_cpu_affinity2( unsigned cpu; if (!(t = strndup(w, l))) - return -ENOMEM; + return log_oom(); r = safe_atou(t, &cpu); free(t); if (!c) if (!(c = cpu_set_malloc(&ncpus))) - return -ENOMEM; + return log_oom(); if (r < 0 || cpu >= ncpus) { log_error("[%s:%u] Failed to parse CPU affinity: %s", filename, line, rvalue); @@ -584,7 +568,7 @@ static int config_parse_join_controllers( s = strndup(w, length); if (!s) - return -ENOMEM; + return log_oom(); l = strv_split(s, ","); free(s); @@ -600,7 +584,7 @@ static int config_parse_join_controllers( arg_join_controllers = new(char**, 2); if (!arg_join_controllers) { strv_free(l); - return -ENOMEM; + return log_oom(); } arg_join_controllers[0] = l; @@ -614,7 +598,7 @@ static int config_parse_join_controllers( t = new0(char**, n+2); if (!t) { strv_free(l); - return -ENOMEM; + return log_oom(); } n = 0; @@ -628,7 +612,7 @@ static int config_parse_join_controllers( if (!c) { strv_free(l); strv_free_free(t); - return -ENOMEM; + return log_oom(); } strv_free(l); @@ -640,7 +624,7 @@ static int config_parse_join_controllers( if (!c) { strv_free(l); strv_free_free(t); - return -ENOMEM; + return log_oom(); } t[n++] = c; @@ -667,9 +651,6 @@ static int parse_config_file(void) { { "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 }, -#ifdef HAVE_SYSV_COMPAT - { "Manager", "SysVConsole", config_parse_bool, 0, &arg_sysv_console }, -#endif { "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 }, @@ -678,6 +659,8 @@ static int parse_config_file(void) { { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers }, { "Manager", "RuntimeWatchdogSec", config_parse_usec, 0, &arg_runtime_watchdog }, { "Manager", "ShutdownWatchdogSec", config_parse_usec, 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]}, @@ -744,10 +727,13 @@ static int parse_proc_cmdline(void) { } r = parse_proc_cmdline_word(word); - free(word); - - if (r < 0) + if (r < 0) { + log_error("Failed on cmdline argument %s: %s", word, strerror(-r)); + free(word); goto finish; + } + + free(word); } r = 0; @@ -768,12 +754,12 @@ static int parse_argv(int argc, char *argv[]) { 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_SYSV_CONSOLE, ARG_DESERIALIZE, ARG_SWITCHED_ROOT, ARG_INTROSPECT, @@ -791,14 +777,12 @@ static int parse_argv(int argc, char *argv[]) { { "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 }, -#ifdef HAVE_SYSV_COMPAT - { "sysv-console", optional_argument, NULL, ARG_SYSV_CONSOLE }, -#endif { "deserialize", required_argument, NULL, ARG_DESERIALIZE }, { "switched-root", no_argument, NULL, ARG_SWITCHED_ROOT }, { "introspect", optional_argument, NULL, ARG_INTROSPECT }, @@ -899,6 +883,10 @@ static int parse_argv(int argc, char *argv[]) { 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; @@ -939,17 +927,6 @@ static int parse_argv(int argc, char *argv[]) { arg_show_status = r; break; -#ifdef HAVE_SYSV_COMPAT - case ARG_SYSV_CONSOLE: - r = optarg ? parse_boolean(optarg) : 1; - if (r < 0) { - log_error("Failed to parse SysV console boolean %s.", optarg); - return r; - } - arg_sysv_console = r; - break; -#endif - case ARG_DESERIALIZE: { int fd; FILE *f; @@ -1043,8 +1020,10 @@ static int parse_argv(int argc, char *argv[]) { * instead. */ for (a = argv; a < argv + argc; a++) - if ((r = parse_proc_cmdline_word(*a)) < 0) + if ((r = parse_proc_cmdline_word(*a)) < 0) { + log_error("Failed on cmdline argument %s: %s", *a, strerror(-r)); return r; + } } return 0; @@ -1065,9 +1044,6 @@ static int help(void) { " --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" -#ifdef HAVE_SYSV_COMPAT - " --sysv-console[=0|1] Connect output of SysV scripts to console\n" -#endif " --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" @@ -1079,7 +1055,15 @@ static int help(void) { return 0; } -static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds) { +static int version(void) { + puts(PACKAGE_STRING); + puts(DISTRIBUTION); + puts(SYSTEMD_FEATURES); + + return 0; +} + +static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool serialize_jobs) { FILE *f = NULL; FDSet *fds = NULL; int r; @@ -1091,18 +1075,21 @@ static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds) { /* Make sure nothing is really destructed when we shut down */ m->n_reloading ++; - if ((r = manager_open_serialization(m, &f)) < 0) { + r = manager_open_serialization(m, &f); + if (r < 0) { log_error("Failed to create serialization file: %s", strerror(-r)); goto fail; } - if (!(fds = fdset_new())) { + fds = fdset_new(); + if (!fds) { r = -ENOMEM; log_error("Failed to allocate fd set: %s", strerror(-r)); goto fail; } - if ((r = manager_serialize(m, f, fds)) < 0) { + r = manager_serialize(m, f, fds, serialize_jobs); + if (r < 0) { log_error("Failed to serialize state: %s", strerror(-r)); goto fail; } @@ -1112,12 +1099,14 @@ static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds) { goto fail; } - if ((r = fd_cloexec(fileno(f), false)) < 0) { + r = fd_cloexec(fileno(f), false); + if (r < 0) { log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r)); goto fail; } - if ((r = fdset_cloexec(fds, false)) < 0) { + r = fdset_cloexec(fds, false); + if (r < 0) { log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r)); goto fail; } @@ -1309,8 +1298,11 @@ int main(int argc, char *argv[]) { } /* Initialize default unit */ - if (set_default_unit(SPECIAL_DEFAULT_TARGET) < 0) + 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; + } /* By default, mount "cpu" and "cpuacct" together */ arg_join_controllers = new(char**, 2); @@ -1364,6 +1356,9 @@ int main(int argc, char *argv[]) { 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; @@ -1462,8 +1457,20 @@ int main(int argc, char *argv[]) { goto finish; } - 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) { + const char *virtualization = NULL; + + log_info(PACKAGE_STRING " running in system mode. (" SYSTEMD_FEATURES "; " DISTRIBUTION ")"); + + 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 "; " DISTRIBUTION ")"); if (arg_running_as == MANAGER_SYSTEM && !skip_setup) { locale_setup(); @@ -1484,6 +1491,32 @@ int main(int argc, char *argv[]) { if (arg_running_as == MANAGER_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 == MANAGER_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?)"); + } + } + r = manager_new(arg_running_as, &m); if (r < 0) { log_error("Failed to allocate manager object: %s", strerror(-r)); @@ -1491,9 +1524,6 @@ int main(int argc, char *argv[]) { } m->confirm_spawn = arg_confirm_spawn; -#ifdef HAVE_SYSV_COMPAT - m->sysv_console = arg_sysv_console; -#endif m->default_std_output = arg_default_std_output; m->default_std_error = arg_default_std_error; m->runtime_watchdog = arg_runtime_watchdog; @@ -1616,7 +1646,7 @@ int main(int argc, char *argv[]) { case MANAGER_REEXECUTE: - if (prepare_reexecute(m, &serialization, &fds) < 0) + if (prepare_reexecute(m, &serialization, &fds, true) < 0) goto finish; reexecute = true; @@ -1630,7 +1660,7 @@ int main(int argc, char *argv[]) { m->switch_root = m->switch_root_init = NULL; if (!switch_root_init) - if (prepare_reexecute(m, &serialization, &fds) < 0) + if (prepare_reexecute(m, &serialization, &fds, false) < 0) goto finish; reexecute = true; @@ -1684,6 +1714,13 @@ finish: watchdog_close(true); 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)); @@ -1735,6 +1772,9 @@ finish: fds = NULL; } + /* Reopen the console */ + make_console_stdio(); + for (j = 1, i = 1; j < argc; j++) args[i++] = argv[j]; args[i++] = NULL; @@ -1749,12 +1789,15 @@ finish: args[0] = "/sbin/init"; execv(args[0], (char* const*) args); - log_warning("Failed to execute /sbin/init, trying fallback: %m"); + 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"); + 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)