#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
+#include <getopt.h>
#include "manager.h"
#include "log.h"
#include "mount-setup.h"
+static enum {
+ ACTION_RUN,
+ ACTION_HELP
+} action = ACTION_RUN;
+
+static char *default_unit = NULL;
+
+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 + 15);
+
+ 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
+ };
+
+ 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 },
+ { "help", no_argument, NULL, 'h' },
+ { 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 'h':
+ action = ACTION_HELP;
+ break;
+
+ case '?':
+ return -EINVAL;
+
+ default:
+ log_error("Unknown option code %c", c);
+ return -EINVAL;
+ }
+
+ if (optind < argc) {
+ log_error("Too many arguments.");
+ 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",
+ __progname);
+
+ return 0;
+}
+
int main(int argc, char *argv[]) {
Manager *m = NULL;
Unit *target = NULL;
Job *job = NULL;
int r, retval = 1;
- const char *default_unit;
- if (argc >= 2)
- default_unit = argv[1];
- else
- default_unit = SPECIAL_DEFAULT_TARGET;
+ if (set_default_unit(SPECIAL_DEFAULT_TARGET) < 0)
+ goto finish;
- /* Move out of the way, so that we won't block unmounts */
- assert_se(chdir("/") == 0);
+ /* Mount /proc, /sys and friends, so that /proc/cmdline and
+ * /proc/$PID/fd is available. */
+ mount_setup();
/* Reset all signal handlers. */
assert_se(reset_all_signal_handlers() == 0);
+ /* Close all open files */
+ assert_se(close_all_fds(NULL, 0) == 0);
+
+ if (parse_proc_cmdline() < 0)
+ goto finish;
+
+ log_parse_environment();
+
+ if (parse_argv(argc, argv) < 0)
+ goto finish;
+
+ if (action == ACTION_HELP) {
+ retval = help();
+ goto finish;
+ }
+
+ assert_se(action == ACTION_RUN);
+
+ /* 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();
/* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */
dbus_connection_set_change_sigpipe(FALSE);
- /* Mount /dev, /sys and friends */
- mount_setup();
-
- /* Set up logging */
- log_set_target(LOG_TARGET_CONSOLE);
-
/* Open the logging devices, if possible and necessary*/
log_open_syslog();
log_open_kmsg();
retval = 0;
+ log_debug("Exit.");
+
finish:
if (m)
manager_free(m);
- log_debug("Exit.");
+ free(default_unit);
dbus_shutdown();
~ianmdlvl / elogind.git / blobdiff