chiark / gitweb /
log: als turn on debug logging in non-PID1 if /proc/cmdline contains "debug"
[elogind.git] / src / core / main.c
index b21fb493da5db9006a05c0372aca381747749809..064445d17e00f30887240c1b159af3d0fae262df 100644 (file)
@@ -19,8 +19,6 @@
   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 <sys/prctl.h>
 #include <sys/mount.h>
 
+#ifdef HAVE_VALGRIND_VALGRIND_H
+#include <valgrind/valgrind.h>
+#endif
+
+#include "sd-daemon.h"
+#include "sd-messages.h"
+#include "sd-bus.h"
 #include "manager.h"
 #include "log.h"
 #include "load-fragment.h"
 #include "fdset.h"
 #include "special.h"
 #include "conf-parser.h"
-#include "dbus-common.h"
 #include "missing.h"
 #include "label.h"
 #include "build.h"
 #include "killall.h"
 #include "env-util.h"
 #include "hwclock.h"
-#include "sd-daemon.h"
-#include "sd-messages.h"
+#include "fileio.h"
+#include "dbus-manager.h"
+#include "bus-error.h"
+#include "bus-util.h"
 
 #include "mount-setup.h"
 #include "loopback-setup.h"
-#ifdef HAVE_KMOD
-#include "kmod-setup.h"
-#endif
 #include "hostname-setup.h"
 #include "machine-id-setup.h"
 #include "selinux-setup.h"
 #include "ima-setup.h"
-#include "fileio.h"
 #include "smack-setup.h"
+#ifdef HAVE_KMOD
+#include "kmod-setup.h"
+#endif
 
 static enum {
         ACTION_RUN,
@@ -93,6 +98,8 @@ static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT;
 static usec_t arg_default_restart_usec = DEFAULT_RESTART_USEC;
 static usec_t arg_default_timeout_start_usec = DEFAULT_TIMEOUT_USEC;
 static usec_t arg_default_timeout_stop_usec = DEFAULT_TIMEOUT_USEC;
+static usec_t arg_default_start_limit_interval = DEFAULT_START_LIMIT_INTERVAL;
+static unsigned arg_default_start_limit_burst = DEFAULT_START_LIMIT_BURST;
 static usec_t arg_runtime_watchdog = 0;
 static usec_t arg_shutdown_watchdog = 10 * USEC_PER_MINUTE;
 static char **arg_default_environment = NULL;
@@ -105,7 +112,7 @@ static FILE* serialization = NULL;
 static void nop_handler(int sig) {
 }
 
-_noreturn_ static void crash(int sig) {
+noreturn static void crash(int sig) {
 
         if (getpid() != 1)
                 /* Pass this on immediately, if this is not PID 1 */
@@ -124,7 +131,7 @@ _noreturn_ static void crash(int sig) {
 
                 pid = fork();
                 if (pid < 0)
-                        log_error("Caught <%s>, cannot fork for core dump: %s", signal_to_string(sig), strerror(errno));
+                        log_error("Caught <%s>, cannot fork for core dump: %m", signal_to_string(sig));
 
                 else if (pid == 0) {
                         struct rlimit rl = {};
@@ -410,7 +417,7 @@ static int parse_proc_cmdline_word(const char *word) {
                  * will block with every log message for for 60 seconds,
                  * before they give up. */
                 log_set_max_level(LOG_DEBUG);
-                log_set_target(LOG_TARGET_KMSG);
+                log_set_target(detect_container(NULL) > 0 ? LOG_TARGET_CONSOLE : LOG_TARGET_KMSG);
         } else if (!in_initrd()) {
                 unsigned i;
 
@@ -428,6 +435,7 @@ static int parse_proc_cmdline_word(const char *word) {
                         const char *filename,                         \
                         unsigned line,                                \
                         const char *section,                          \
+                        unsigned section_line,                        \
                         const char *lvalue,                           \
                         int ltype,                                    \
                         const char *rvalue,                           \
@@ -454,11 +462,11 @@ DEFINE_SETTER(config_parse_target, log_set_target_from_string, "target")
 DEFINE_SETTER(config_parse_color, log_show_color_from_string, "color" )
 DEFINE_SETTER(config_parse_location, log_show_location_from_string, "location")
 
-
 static int config_parse_cpu_affinity2(const char *unit,
                                       const char *filename,
                                       unsigned line,
                                       const char *section,
+                                      unsigned section_line,
                                       const char *lvalue,
                                       int ltype,
                                       const char *rvalue,
@@ -531,6 +539,7 @@ static int config_parse_join_controllers(const char *unit,
                                          const char *filename,
                                          unsigned line,
                                          const char *section,
+                                         unsigned section_line,
                                          const char *lvalue,
                                          int ltype,
                                          const char *rvalue,
@@ -642,6 +651,8 @@ static int parse_config_file(void) {
                 { "Manager", "DefaultTimeoutStartSec", config_parse_sec,         0, &arg_default_timeout_start_usec },
                 { "Manager", "DefaultTimeoutStopSec", config_parse_sec,          0, &arg_default_timeout_stop_usec  },
                 { "Manager", "DefaultRestartSec",     config_parse_sec,          0, &arg_default_restart_usec  },
+                { "Manager", "DefaultStartLimitInterval", config_parse_sec,      0, &arg_default_start_limit_interval },
+                { "Manager", "DefaultStartLimitBurst", config_parse_unsigned,    0, &arg_default_start_limit_burst },
                 { "Manager", "JoinControllers",       config_parse_join_controllers, 0, &arg_join_controllers },
                 { "Manager", "RuntimeWatchdogSec",    config_parse_sec,          0, &arg_runtime_watchdog    },
                 { "Manager", "ShutdownWatchdogSec",   config_parse_sec,          0, &arg_shutdown_watchdog   },
@@ -691,19 +702,14 @@ static int parse_config_file(void) {
 static int parse_proc_cmdline(void) {
         _cleanup_free_ char *line = NULL;
         char *w, *state;
-        int r;
         size_t l;
+        int r;
 
-        /* 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;
-
-        r = read_one_line_file("/proc/cmdline", &line);
-        if (r < 0) {
+        r = proc_cmdline(&line);
+        if (r < 0)
                 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
+        if (r <= 0)
                 return 0;
-        }
 
         FOREACH_WORD_QUOTED(w, l, line, state) {
                 _cleanup_free_ char *word;
@@ -979,11 +985,13 @@ static int parse_argv(int argc, char *argv[]) {
                  * 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) {
+                for (a = argv; a < argv + argc; a++) {
+                        r = parse_proc_cmdline_word(*a);
+                        if (r < 0) {
                                 log_error("Failed on cmdline argument %s: %s", *a, strerror(-r));
                                 return r;
                         }
+                }
         }
 
         return 0;
@@ -1038,7 +1046,7 @@ static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching
 
         /* Make sure nothing is really destructed when we shut down */
         m->n_reloading ++;
-        bus_broadcast_reloading(m, true);
+        bus_manager_send_reloading(m, true);
 
         fds = fdset_new();
         if (!fds) {
@@ -1200,6 +1208,8 @@ int main(int argc, char *argv[]) {
         dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
         dual_timestamp userspace_timestamp = { 0ULL, 0ULL };
         dual_timestamp kernel_timestamp = { 0ULL, 0ULL };
+        dual_timestamp security_start_timestamp = { 0ULL, 0ULL };
+        dual_timestamp security_finish_timestamp = { 0ULL, 0ULL };
         static char systemd[] = "systemd";
         bool skip_setup = false;
         int j;
@@ -1264,12 +1274,14 @@ int main(int argc, char *argv[]) {
 
                 if (!skip_setup) {
                         mount_setup_early();
+                        dual_timestamp_get(&security_start_timestamp);
                         if (selinux_setup(&loaded_policy) < 0)
                                 goto finish;
                         if (ima_setup() < 0)
                                 goto finish;
                         if (smack_setup() < 0)
                                 goto finish;
+                        dual_timestamp_get(&security_finish_timestamp);
                 }
 
                 if (label_init(NULL) < 0)
@@ -1315,6 +1327,7 @@ int main(int argc, char *argv[]) {
                 /* Running inside a container, as PID 1 */
                 arg_running_as = SYSTEMD_SYSTEM;
                 log_set_target(LOG_TARGET_CONSOLE);
+                log_close_console(); /* force reopen of /dev/console */
                 log_open();
 
                 /* For the later on, see above... */
@@ -1408,6 +1421,12 @@ int main(int argc, char *argv[]) {
                 goto finish;
         }
 
+        if (arg_running_as == SYSTEMD_USER &&
+            !getenv("XDG_RUNTIME_DIR")) {
+                log_error("Trying to run as user instance, but $XDG_RUNTIME_DIR is not set.");
+                goto finish;
+        }
+
         assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
 
         /* Close logging fds, in order not to confuse fdset below */
@@ -1431,9 +1450,6 @@ int main(int argc, char *argv[]) {
         /* Move out of the way, so that we won't block unmounts */
         assert_se(chdir("/")  == 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 == SYSTEMD_SYSTEM && arg_action == ACTION_RUN)
@@ -1472,7 +1488,8 @@ int main(int argc, char *argv[]) {
                         status_welcome();
 
 #ifdef HAVE_KMOD
-                kmod_setup();
+                if (detect_container(NULL) <= 0)
+                        kmod_setup();
 #endif
                 hostname_setup();
                 machine_id_setup();
@@ -1515,7 +1532,7 @@ int main(int argc, char *argv[]) {
         if (arg_running_as == SYSTEMD_SYSTEM)
                 bump_rlimit_nofile(&saved_rlimit_nofile);
 
-        r = manager_new(arg_running_as, !!serialization, &m);
+        r = manager_new(arg_running_as, &m);
         if (r < 0) {
                 log_error("Failed to allocate manager object: %s", strerror(-r));
                 goto finish;
@@ -1527,16 +1544,20 @@ int main(int argc, char *argv[]) {
         m->default_restart_usec = arg_default_restart_usec;
         m->default_timeout_start_usec = arg_default_timeout_start_usec;
         m->default_timeout_stop_usec = arg_default_timeout_stop_usec;
+        m->default_start_limit_interval = arg_default_start_limit_interval;
+        m->default_start_limit_burst = arg_default_start_limit_burst;
         m->runtime_watchdog = arg_runtime_watchdog;
         m->shutdown_watchdog = arg_shutdown_watchdog;
         m->userspace_timestamp = userspace_timestamp;
         m->kernel_timestamp = kernel_timestamp;
         m->initrd_timestamp = initrd_timestamp;
+        m->security_start_timestamp = security_start_timestamp;
+        m->security_finish_timestamp = security_finish_timestamp;
 
         manager_set_default_rlimits(m, arg_default_rlimit);
 
         if (arg_default_environment)
-                manager_environment_add(m, arg_default_environment);
+                manager_environment_add(m, NULL, arg_default_environment);
 
         manager_set_show_status(m, arg_show_status);
 
@@ -1560,19 +1581,16 @@ int main(int argc, char *argv[]) {
         }
 
         if (queue_default_job) {
-                DBusError error;
+                _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
                 Unit *target = NULL;
                 Job *default_unit_job;
 
-                dbus_error_init(&error);
-
                 log_debug("Activating default unit: %s", arg_default_unit);
 
                 r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
-                if (r < 0) {
-                        log_error("Failed to load default target: %s", bus_error(&error, r));
-                        dbus_error_free(&error);
-                } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND)
+                if (r < 0)
+                        log_error("Failed to load default target: %s", bus_error_message(&error, r));
+                else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND)
                         log_error("Failed to load default target: %s", strerror(-target->load_error));
                 else if (target->load_state == UNIT_MASKED)
                         log_error("Default target masked.");
@@ -1582,8 +1600,7 @@ int main(int argc, char *argv[]) {
 
                         r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
                         if (r < 0) {
-                                log_error("Failed to load rescue target: %s", bus_error(&error, r));
-                                dbus_error_free(&error);
+                                log_error("Failed to load rescue target: %s", bus_error_message(&error, r));
                                 goto finish;
                         } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND) {
                                 log_error("Failed to load rescue target: %s", strerror(-target->load_error));
@@ -1603,18 +1620,15 @@ int main(int argc, char *argv[]) {
 
                 r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, false, &error, &default_unit_job);
                 if (r == -EPERM) {
-                        log_debug("Default target could not be isolated, starting instead: %s", bus_error(&error, r));
-                        dbus_error_free(&error);
+                        log_debug("Default target could not be isolated, starting instead: %s", bus_error_message(&error, r));
 
                         r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
                         if (r < 0) {
-                                log_error("Failed to start default target: %s", bus_error(&error, r));
-                                dbus_error_free(&error);
+                                log_error("Failed to start default target: %s", bus_error_message(&error, r));
                                 goto finish;
                         }
                 } else if (r < 0) {
-                        log_error("Failed to isolate default target: %s", bus_error(&error, r));
-                        dbus_error_free(&error);
+                        log_error("Failed to isolate default target: %s", bus_error_message(&error, r));
                         goto finish;
                 }
 
@@ -1710,7 +1724,6 @@ finish:
         free(arg_default_unit);
         free_join_controllers();
 
-        dbus_shutdown();
         label_finish();
 
         if (reexecute) {
@@ -1733,7 +1746,7 @@ finish:
                          * initrd, but don't wait for them, so that we
                          * can handle the SIGCHLD for them after
                          * deserializing. */
-                        broadcast_signal(SIGTERM, false);
+                        broadcast_signal(SIGTERM, false, true);
 
                         /* And switch root */
                         r = switch_root(switch_root_dir);
@@ -1825,6 +1838,15 @@ finish:
         if (fds)
                 fdset_free(fds);
 
+#ifdef HAVE_VALGRIND_VALGRIND_H
+        /* If we are PID 1 and running under valgrind, then let's exit
+         * here explicitly. valgrind will only generate nice output on
+         * exit(), not on exec(), hence let's do the former not the
+         * latter here. */
+        if (getpid() == 1 && RUNNING_ON_VALGRIND)
+                return 0;
+#endif
+
         if (shutdown_verb) {
                 const char * command_line[] = {
                         SYSTEMD_SHUTDOWN_BINARY_PATH,