X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=main.c;h=4aa63cba77310ac27fd56a2476b8703a2fab6ffc;hp=47292bb2041cdca50a0b4955e3e5e956ed611f06;hb=97c4f35cd541baa2f985ff702a5b9f0b8b524a53;hpb=9152c765065184d0c1267ed2499e3fe4cac53755
diff --git a/main.c b/main.c
index 47292bb20..4aa63cba7 100644
--- a/main.c
+++ b/main.c
@@ -1,56 +1,440 @@
/*-*- Mode: C; c-basic-offset: 8 -*-*/
+/***
+ 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 .
+***/
+
+#include
+
#include
#include
#include
#include
+#include
+#include
+#include
+#include
#include "manager.h"
#include "log.h"
+#include "mount-setup.h"
+#include "hostname-setup.h"
+#include "load-fragment.h"
+
+static enum {
+ ACTION_RUN,
+ ACTION_HELP,
+ ACTION_TEST,
+ ACTION_DUMP_CONFIGURATION_ITEMS
+} action = ACTION_RUN;
+
+static char *default_unit = NULL;
+static ManagerRunningAs running_as = _MANAGER_RUNNING_AS_INVALID;
+static bool dump_core = true;
+
+_noreturn static void freeze(void) {
+ for (;;)
+ pause();
+}
+
+_noreturn static void crash(int sig) {
+
+ if (!dump_core)
+ log_error("Caught <%s>, not dumping core.", strsignal(sig));
+ else {
+ pid_t pid;
+
+ log_warning("Caugh <%s>, dumping core.", strsignal(sig));
+
+ if ((pid = fork()) < 0)
+ log_error("Caught <%s>, cannot dump core: %s", strsignal(sig), strerror(errno));
+
+ else if (pid == 0) {
+ struct sigaction sa;
+ 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);
+ }
+ }
+
+ log_error("Freezing execution.");
+ freeze();
+}
+
+static void install_crash_handler(void) {
+ struct sigaction sa;
+
+ zero(sa);
+
+ sa.sa_handler = crash;
+ sa.sa_flags = SA_NODEFER;
+
+ assert_se(sigaction(SIGSEGV, &sa, NULL) == 0);
+ assert_se(sigaction(SIGABRT, &sa, NULL) == 0);
+}
+
+static int set_default_unit(const char *u) {
+ char *c;
+
+ assert(u);
+
+ if (!(c = strdup(u)))
+ return -ENOMEM;
+
+ free(default_unit);
+ default_unit = c;
+ return 0;
+}
+
+static int parse_proc_cmdline_word(const char *word) {
+
+ static const char * const rlmap[] = {
+ "single", SPECIAL_RUNLEVEL1_TARGET,
+ "-s", SPECIAL_RUNLEVEL1_TARGET,
+ "s", SPECIAL_RUNLEVEL1_TARGET,
+ "S", SPECIAL_RUNLEVEL1_TARGET,
+ "1", SPECIAL_RUNLEVEL1_TARGET,
+ "2", SPECIAL_RUNLEVEL2_TARGET,
+ "3", SPECIAL_RUNLEVEL3_TARGET,
+ "4", SPECIAL_RUNLEVEL4_TARGET,
+ "5", SPECIAL_RUNLEVEL5_TARGET
+ };
+
+ if (startswith(word, "systemd.default="))
+ return set_default_unit(word + 16);
+
+ else if (startswith(word, "systemd.log_target=")) {
+
+ if (log_set_target_from_string(word + 19) < 0)
+ log_warning("Failed to parse log target %s. Ignoring.", word + 19);
+
+ } else if (startswith(word, "systemd.log_level=")) {
+
+ if (log_set_max_level_from_string(word + 18) < 0)
+ log_warning("Failed to parse log level %s. Ignoring.", word + 18);
+
+ } else {
+ 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 parse_proc_cmdline(void) {
+ char *line;
+ int r;
+ char *w;
+ size_t l;
+ char *state;
+
+ if ((r = read_one_line_file("/proc/cmdline", &line)) < 0) {
+ log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(errno));
+ 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_DEFAULT,
+ ARG_RUNNING_AS,
+ ARG_TEST,
+ ARG_DUMP_CONFIGURATION_ITEMS
+ };
+
+ static const struct option options[] = {
+ { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
+ { "log-target", required_argument, NULL, ARG_LOG_TARGET },
+ { "default", required_argument, NULL, ARG_DEFAULT },
+ { "running-as", required_argument, NULL, ARG_RUNNING_AS },
+ { "test", no_argument, NULL, ARG_TEST },
+ { "help", no_argument, NULL, 'h' },
+ { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
+ { NULL, 0, NULL, 0 }
+ };
+
+ int c, r;
+
+ assert(argc >= 1);
+ assert(argv);
+
+ while ((c = getopt_long(argc, argv, "h", 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_DEFAULT:
+
+ if ((r = set_default_unit(optarg)) < 0) {
+ log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
+ return r;
+ }
+
+ break;
+
+ case ARG_RUNNING_AS: {
+ ManagerRunningAs as;
+
+ if ((as = manager_running_as_from_string(optarg)) < 0) {
+ log_error("Failed to parse running as value %s", optarg);
+ return -EINVAL;
+ }
+
+ running_as = as;
+ break;
+ }
+
+ case ARG_TEST:
+ action = ACTION_TEST;
+ break;
+
+ case ARG_DUMP_CONFIGURATION_ITEMS:
+ action = ACTION_DUMP_CONFIGURATION_ITEMS;
+ break;
+
+ case 'h':
+ action = ACTION_HELP;
+ break;
+
+ case '?':
+ return -EINVAL;
+
+ default:
+ log_error("Unknown option code %c", c);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int help(void) {
+
+ printf("%s [options]\n\n"
+ " -h --help Show this help\n"
+ " --default=UNIT Set default unit\n"
+ " --log-level=LEVEL Set log level\n"
+ " --log-target=TARGET Set log target (console, syslog, kmsg)\n"
+ " --running-as=AS Set running as (init, system, session)\n"
+ " --test Determine startup sequence, dump it and exit\n"
+ " --dump-configuration-items Dump understood unit configuration items\n",
+ __progname);
+
+ return 0;
+}
int main(int argc, char *argv[]) {
Manager *m = NULL;
- Name *milestone = NULL, *syslog = NULL;
+ Unit *target = NULL;
Job *job = NULL;
int r, retval = 1;
- assert_se(chdir("test1") == 0);
+ if (getpid() == 1)
+ running_as = MANAGER_INIT;
+ else if (getuid() == 0)
+ running_as = MANAGER_SYSTEM;
+ else
+ running_as = MANAGER_SESSION;
+
+ 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 (mount_setup() < 0)
+ goto finish;
+
+ /* Reset all signal handlers. */
+ assert_se(reset_all_signal_handlers() == 0);
+
+ /* Close all open files */
+ assert_se(close_all_fds(NULL, 0) == 0);
+
+ if (running_as != MANAGER_SESSION)
+ if (parse_proc_cmdline() < 0)
+ goto finish;
+
+ log_parse_environment();
- if (!(m = manager_new()) < 0) {
- log_error("Failed to allocate manager object: %s", strerror(ENOMEM));
+ if (parse_argv(argc, argv) < 0)
+ goto finish;
+
+ if (action == ACTION_HELP) {
+ retval = help();
+ goto finish;
+ } else if (action == ACTION_DUMP_CONFIGURATION_ITEMS) {
+ unit_dump_config_items(stdout);
+ retval = 0;
goto finish;
}
- if ((r = manager_load_name(m, "default.milestone", &milestone)) < 0) {
- log_error("Failed to load default milestone: %s", strerror(-r));
+ assert_se(action == ACTION_RUN || action == ACTION_TEST);
+
+ /* Set up PATH unless it is already set */
+ setenv("PATH",
+ "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
+ running_as == MANAGER_INIT);
+
+ /* Move out of the way, so that we won't block unmounts */
+ assert_se(chdir("/") == 0);
+
+ /* 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);
+
+ /* Open the logging devices, if possible and necessary*/
+ log_open_syslog();
+ log_open_kmsg();
+
+ install_crash_handler();
+ assert(!"esel");
+
+ log_debug("systemd running in %s mode.", manager_running_as_to_string(running_as));
+
+ if (running_as == MANAGER_INIT)
+ hostname_setup();
+
+ if ((r = manager_new(running_as, &m)) < 0) {
+ log_error("Failed to allocate manager object: %s", strerror(-r));
goto finish;
}
- if ((r = manager_load_name(m, "syslog.socket", &syslog)) < 0) {
- log_error("Failed to load syslog socket: %s", strerror(-r));
+ if ((r = manager_coldplug(m)) < 0) {
+ log_error("Failed to retrieve coldplug information: %s", strerror(-r));
goto finish;
}
- if ((r = manager_add_job(m, JOB_START, milestone, JOB_REPLACE, false, &job)) < 0) {
- log_error("Failed to start default milestone: %s", strerror(-r));
+ log_debug("Activating default unit: %s", default_unit);
+
+ if ((r = manager_load_unit(m, default_unit, &target)) < 0) {
+ log_error("Failed to load default target: %s", strerror(-r));
+
+ log_info("Trying to load rescue target...");
+ if ((r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, &target)) < 0) {
+ log_error("Failed to load rescue target: %s", strerror(-r));
+ goto finish;
+ }
+ }
+
+ if (action == ACTION_TEST) {
+ printf("â By units:\n");
+ manager_dump_units(m, stdout, "\t");
+ }
+
+ if ((r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &job)) < 0) {
+ log_error("Failed to start default target: %s", strerror(-r));
goto finish;
}
- printf("- By names:\n");
- manager_dump_names(m, stdout, "\t");
+ if (action == ACTION_TEST) {
+ printf("â By jobs:\n");
+ manager_dump_jobs(m, stdout, "\t");
- printf("- By jobs:\n");
- manager_dump_jobs(m, stdout, "\t");
+ if (getpid() == 1)
+ pause();
- manager_run_jobs(m);
+ retval = 0;
+ goto finish;
+ }
- manager_loop(m);
+ if ((r = manager_loop(m)) < 0) {
+ log_error("Failed to run mainloop: %s", strerror(-r));
+ goto finish;
+ }
retval = 0;
+ log_debug("Exit.");
+
finish:
if (m)
manager_free(m);
+ free(default_unit);
+
+ dbus_shutdown();
+
return retval;
}