diff options
Diffstat (limited to 'main.c')
| -rw-r--r-- | main.c | 221 |
1 files changed, 207 insertions, 14 deletions
@@ -27,29 +27,226 @@ #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(); @@ -59,12 +256,6 @@ int main(int argc, char *argv[]) { /* 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(); @@ -104,11 +295,13 @@ int main(int argc, char *argv[]) { retval = 0; + log_debug("Exit."); + finish: if (m) manager_free(m); - log_debug("Exit."); + free(default_unit); dbus_shutdown(); |