X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=service.c;h=ef43537357ab9f70625b89f3fd7e99c8bcccb6fc;hb=ca714c0e55008cceda013ab876ccdd4640d863ae;hp=e5a9658bcfa7784edef26acb0cf17f917998c194;hpb=51a1a79d3fbb23cfb4ce07ea218e77efbce94cdd;p=elogind.git

diff --git a/service.c b/service.c
index e5a9658bc..ef4353735 100644
--- a/service.c
+++ b/service.c
@@ -63,6 +63,26 @@ static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
         [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING,
 };
 
+static void service_unwatch_control_pid(Service *s) {
+        assert(s);
+
+        if (s->control_pid <= 0)
+                return;
+
+        unit_unwatch_pid(UNIT(s), s->control_pid);
+        s->control_pid = 0;
+}
+
+static void service_unwatch_main_pid(Service *s) {
+        assert(s);
+
+        if (s->main_pid <= 0)
+                return;
+
+        unit_unwatch_pid(UNIT(s), s->main_pid);
+        s->main_pid = 0;
+}
+
 static void service_done(Unit *u) {
         Service *s = SERVICE(u);
 
@@ -78,20 +98,13 @@ static void service_done(Unit *u) {
         s->sysv_runlevels = NULL;
 
         exec_context_done(&s->exec_context);
-        exec_command_free_array(s->exec_command, _SERVICE_EXEC_MAX);
+        exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
         s->control_command = NULL;
 
         /* This will leak a process, but at least no memory or any of
          * our resources */
-        if (s->main_pid > 0) {
-                unit_unwatch_pid(u, s->main_pid);
-                s->main_pid = 0;
-        }
-
-        if (s->control_pid > 0) {
-                unit_unwatch_pid(u, s->control_pid);
-                s->control_pid = 0;
-        }
+        service_unwatch_main_pid(s);
+        service_unwatch_control_pid(s);
 
         unit_unwatch_timer(u, &s->timer_watch);
 }
@@ -280,7 +293,7 @@ static int priority_from_rcd(Service *s, const char *init_script) {
         return 0;
 }
 
-static int service_load_sysv_path(Service *s, const char *path, UnitLoadState *new_state) {
+static int service_load_sysv_path(Service *s, const char *path) {
         FILE *f;
         Unit *u;
         unsigned line = 0;
@@ -294,7 +307,6 @@ static int service_load_sysv_path(Service *s, const char *path, UnitLoadState *n
 
         assert(s);
         assert(path);
-        assert(new_state);
 
         u = UNIT(s);
 
@@ -607,7 +619,7 @@ static int service_load_sysv_path(Service *s, const char *path, UnitLoadState *n
                         goto finish;
         }
 
-        *new_state = UNIT_LOADED;
+        u->meta.load_state = UNIT_LOADED;
         r = 0;
 
 finish:
@@ -618,7 +630,7 @@ finish:
         return r;
 }
 
-static int service_load_sysv_name(Service *s, const char *name, UnitLoadState *new_state) {
+static int service_load_sysv_name(Service *s, const char *name) {
         char **p;
 
         assert(s);
@@ -634,26 +646,25 @@ static int service_load_sysv_name(Service *s, const char *name, UnitLoadState *n
                 assert(endswith(path, ".service"));
                 path[strlen(path)-8] = 0;
 
-                r = service_load_sysv_path(s, path, new_state);
+                r = service_load_sysv_path(s, path);
                 free(path);
 
                 if (r < 0)
                         return r;
 
-                if (*new_state != UNIT_STUB)
+                if ((UNIT(s)->meta.load_state != UNIT_STUB))
                         break;
         }
 
         return 0;
 }
 
-static int service_load_sysv(Service *s, UnitLoadState *new_state) {
+static int service_load_sysv(Service *s) {
         const char *t;
         Iterator i;
         int r;
 
         assert(s);
-        assert(new_state);
 
         /* Load service data from SysV init scripts, preferably with
          * LSB headers ... */
@@ -662,31 +673,29 @@ static int service_load_sysv(Service *s, UnitLoadState *new_state) {
                 return 0;
 
         if ((t = unit_id(UNIT(s))))
-                if ((r = service_load_sysv_name(s, t, new_state)) < 0)
+                if ((r = service_load_sysv_name(s, t)) < 0)
                         return r;
 
-        if (*new_state == UNIT_STUB)
+        if (UNIT(s)->meta.load_state == UNIT_STUB)
                 SET_FOREACH(t, UNIT(s)->meta.names, i) {
-                        if ((r == service_load_sysv_name(s, t, new_state)) < 0)
+                        if (t == unit_id(UNIT(s)))
+                                continue;
+
+                        if ((r == service_load_sysv_name(s, t)) < 0)
                                 return r;
 
-                        if (*new_state != UNIT_STUB)
+                        if (UNIT(s)->meta.load_state != UNIT_STUB)
                                 break;
                 }
 
         return 0;
 }
 
-static int service_init(Unit *u, UnitLoadState *new_state) {
-        int r;
+static void service_init(Unit *u) {
         Service *s = SERVICE(u);
 
-        assert(s);
-        assert(new_state);
-        assert(*new_state == UNIT_STUB);
-
-        /* First, reset everything to the defaults, in case this is a
-         * reload */
+        assert(u);
+        assert(u->meta.load_state == UNIT_STUB);
 
         s->type = 0;
         s->restart = 0;
@@ -711,18 +720,25 @@ static int service_init(Unit *u, UnitLoadState *new_state) {
         s->failure = false;
 
         RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5);
+}
+
+static int service_load(Unit *u) {
+        int r;
+        Service *s = SERVICE(u);
+
+        assert(s);
 
         /* Load a .service file */
-        if ((r = unit_load_fragment(u, new_state)) < 0)
+        if ((r = unit_load_fragment(u)) < 0)
                 return r;
 
         /* Load a classic init script as a fallback, if we couldn't find anything */
-        if (*new_state == UNIT_STUB)
-                if ((r = service_load_sysv(s, new_state)) < 0)
+        if (u->meta.load_state == UNIT_STUB)
+                if ((r = service_load_sysv(s)) < 0)
                         return r;
 
         /* Still nothing found? Then let's give up */
-        if (*new_state == UNIT_STUB)
+        if (u->meta.load_state == UNIT_STUB)
                 return -ENOENT;
 
         /* We were able to load something, then let's add in the
@@ -731,7 +747,7 @@ static int service_init(Unit *u, UnitLoadState *new_state) {
                 return r;
 
         /* This is a new unit? Then let's add in some extras */
-        if (*new_state == UNIT_LOADED) {
+        if (u->meta.load_state == UNIT_LOADED) {
                 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
                         return r;
 
@@ -788,7 +804,7 @@ static void service_dump(Unit *u, FILE *f, const char *prefix) {
 
         exec_context_dump(&s->exec_context, f, prefix);
 
-        for (c = 0; c < _SERVICE_EXEC_MAX; c++) {
+        for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
 
                 if (!s->exec_command[c])
                         continue;
@@ -828,6 +844,8 @@ static int service_load_pid_file(Service *s) {
         if (s->main_pid_known)
                 return 0;
 
+        assert(s->main_pid <= 0);
+
         if (!s->pid_file)
                 return -ENOENT;
 
@@ -904,7 +922,7 @@ fail:
 }
 
 
-static int service_notify_sockets(Service *s) {
+static int service_notify_sockets_dead(Service *s) {
         Iterator i;
         Set *set;
         Socket *sock;
@@ -952,10 +970,7 @@ static void service_set_state(Service *s, ServiceState state) {
             state != SERVICE_STOP &&
             state != SERVICE_STOP_SIGTERM &&
             state != SERVICE_STOP_SIGKILL)
-                if (s->main_pid > 0) {
-                        unit_unwatch_pid(UNIT(s), s->main_pid);
-                        s->main_pid = 0;
-                }
+                service_unwatch_main_pid(s);
 
         if (state != SERVICE_START_PRE &&
             state != SERVICE_START &&
@@ -966,19 +981,10 @@ static void service_set_state(Service *s, ServiceState state) {
             state != SERVICE_STOP_SIGKILL &&
             state != SERVICE_STOP_POST &&
             state != SERVICE_FINAL_SIGTERM &&
-            state != SERVICE_FINAL_SIGKILL)
-                if (s->control_pid > 0) {
-                        unit_unwatch_pid(UNIT(s), s->control_pid);
-                        s->control_pid = 0;
-                }
-
-        if (state != SERVICE_START_PRE &&
-            state != SERVICE_START &&
-            state != SERVICE_START_POST &&
-            state != SERVICE_RELOAD &&
-            state != SERVICE_STOP &&
-            state != SERVICE_STOP_POST)
+            state != SERVICE_FINAL_SIGKILL) {
+                service_unwatch_control_pid(s);
                 s->control_command = NULL;
+        }
 
         if (state == SERVICE_DEAD ||
             state == SERVICE_STOP ||
@@ -989,12 +995,10 @@ static void service_set_state(Service *s, ServiceState state) {
             state == SERVICE_FINAL_SIGKILL ||
             state == SERVICE_MAINTAINANCE ||
             state == SERVICE_AUTO_RESTART)
-                service_notify_sockets(s);
-
-        if (old_state == state)
-                return;
+                service_notify_sockets_dead(s);
 
-        log_debug("%s changed %s → %s", unit_id(UNIT(s)), service_state_to_string(old_state), service_state_to_string(state));
+        if (old_state != state)
+                log_debug("%s changed %s → %s", unit_id(UNIT(s)), service_state_to_string(old_state), service_state_to_string(state));
 
         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
 }
@@ -1149,6 +1153,8 @@ static void service_enter_stop_post(Service *s, bool success) {
         if (!success)
                 s->failure = true;
 
+        service_unwatch_control_pid(s);
+
         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST]))
                 if ((r = service_spawn(s,
                                        s->control_command,
@@ -1242,6 +1248,8 @@ static void service_enter_stop(Service *s, bool success) {
         if (!success)
                 s->failure = true;
 
+        service_unwatch_control_pid(s);
+
         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP]))
                 if ((r = service_spawn(s,
                                        s->control_command,
@@ -1268,6 +1276,8 @@ static void service_enter_start_post(Service *s) {
         int r;
         assert(s);
 
+        service_unwatch_control_pid(s);
+
         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST]))
                 if ((r = service_spawn(s,
                                        s->control_command,
@@ -1315,6 +1325,8 @@ static void service_enter_start(Service *s) {
                 /* For simple services we immediately start
                  * the START_POST binaries. */
 
+                service_unwatch_main_pid(s);
+
                 s->main_pid = pid;
                 s->main_pid_known = true;
                 service_enter_start_post(s);
@@ -1324,6 +1336,8 @@ static void service_enter_start(Service *s) {
                 /* For forking services we wait until the start
                  * process exited. */
 
+                service_unwatch_control_pid(s);
+
                 s->control_pid = pid;
                 s->control_command = s->exec_command[SERVICE_EXEC_START];
         } else if (s->type == SERVICE_FINISH) {
@@ -1331,7 +1345,10 @@ static void service_enter_start(Service *s) {
                 /* For finishing services we wait until the start
                  * process exited, too, but it is our main process. */
 
+                service_unwatch_main_pid(s);
+
                 s->main_pid = pid;
+                s->main_pid_known = true;
                 s->control_command = s->exec_command[SERVICE_EXEC_START];
         } else
                 assert_not_reached("Unknown service type");
@@ -1348,6 +1365,8 @@ static void service_enter_start_pre(Service *s) {
 
         assert(s);
 
+        service_unwatch_control_pid(s);
+
         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE]))
                 if ((r = service_spawn(s,
                                        s->control_command,
@@ -1392,6 +1411,8 @@ static void service_enter_reload(Service *s) {
 
         assert(s);
 
+        service_unwatch_control_pid(s);
+
         if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD]))
                 if ((r = service_spawn(s,
                                        s->control_command,
@@ -1426,6 +1447,8 @@ static void service_run_next(Service *s, bool success) {
 
         s->control_command = s->control_command->command_next;
 
+        service_unwatch_control_pid(s);
+
         if ((r = service_spawn(s,
                                s->control_command,
                                true,
@@ -1489,12 +1512,22 @@ static int service_stop(Unit *u) {
 
         assert(s);
 
+        /* Cannot do this now */
         if (s->state == SERVICE_START_PRE ||
             s->state == SERVICE_START ||
             s->state == SERVICE_START_POST ||
             s->state == SERVICE_RELOAD)
                 return -EAGAIN;
 
+        /* Already on it */
+        if (s->state == SERVICE_STOP ||
+            s->state == SERVICE_STOP_SIGTERM ||
+            s->state == SERVICE_STOP_SIGKILL ||
+            s->state == SERVICE_STOP_POST ||
+            s->state == SERVICE_FINAL_SIGTERM ||
+            s->state == SERVICE_FINAL_SIGKILL)
+                return 0;
+
         if (s->state == SERVICE_AUTO_RESTART) {
                 service_set_state(s, SERVICE_DEAD);
                 return 0;
@@ -1966,7 +1999,7 @@ static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
 
 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
 
-static const char* const service_exec_command_table[_SERVICE_EXEC_MAX] = {
+static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
         [SERVICE_EXEC_START_PRE] = "ExecStartPre",
         [SERVICE_EXEC_START] = "ExecStart",
         [SERVICE_EXEC_START_POST] = "ExecStartPost",
@@ -1981,6 +2014,7 @@ const UnitVTable service_vtable = {
         .suffix = ".service",
 
         .init = service_init,
+        .load = service_load,
         .done = service_done,
 
         .dump = service_dump,