From b690ef12b59187074cf5a9c02a69d06fa1398789 Mon Sep 17 00:00:00 2001
From: David Herrmann <dh.herrmann@gmail.com>
Date: Tue, 29 Sep 2015 11:18:46 +0200
Subject: [PATCH] login: make user->service static

Just like user->slice, there is no reason to store the unit name in /run,
nor should we allocate it dynamically on job instantiation/removal. Just
keep it statically around at all times and rely on user->started ||
user->stopping to figure out whether the unit exists or not.
---
 src/login/logind-user.c | 52 ++++++++++++++++-------------------------
 1 file changed, 20 insertions(+), 32 deletions(-)

diff --git a/src/login/logind-user.c b/src/login/logind-user.c
index 292a5831031..b9d9d537e2a 100644
--- a/src/login/logind-user.c
+++ b/src/login/logind-user.c
@@ -67,6 +67,7 @@ int user_new(User **out, Manager *m, uid_t uid, gid_t gid, const char *name) {
         u->manager = m;
         u->uid = uid;
         u->gid = gid;
+        xsprintf(lu, UID_FMT, uid);
 
         u->name = strdup(name);
         if (!u->name)
@@ -78,11 +79,14 @@ int user_new(User **out, Manager *m, uid_t uid, gid_t gid, const char *name) {
         if (asprintf(&u->runtime_path, "/run/user/"UID_FMT, uid) < 0)
                 return -ENOMEM;
 
-        xsprintf(lu, UID_FMT, uid);
         r = slice_build_subslice(SPECIAL_USER_SLICE, lu, &u->slice);
         if (r < 0)
                 return r;
 
+        r = unit_name_build("user", lu, ".service", &u->service);
+        if (r < 0)
+                return r;
+
         r = hashmap_put(m->users, UID_TO_PTR(uid), u);
         if (r < 0)
                 return r;
@@ -91,6 +95,10 @@ int user_new(User **out, Manager *m, uid_t uid, gid_t gid, const char *name) {
         if (r < 0)
                 return r;
 
+        r = hashmap_put(m->user_units, u->service, u);
+        if (r < 0)
+                return r;
+
         *out = u;
         u = NULL;
         return 0;
@@ -155,8 +163,6 @@ static int user_save_internal(User *u) {
         if (u->runtime_path)
                 fprintf(f, "RUNTIME=%s\n", u->runtime_path);
 
-        if (u->service)
-                fprintf(f, "SERVICE=%s\n", u->service);
         if (u->service_job)
                 fprintf(f, "SERVICE_JOB=%s\n", u->service_job);
 
@@ -297,7 +303,6 @@ int user_load(User *u) {
         assert(u);
 
         r = parse_env_file(u->state_file, NEWLINE,
-                           "SERVICE",     &u->service,
                            "SERVICE_JOB", &u->service_job,
                            "SLICE_JOB",   &u->slice_job,
                            "DISPLAY",     &display,
@@ -425,34 +430,20 @@ static int user_start_service(User *u) {
 
         assert(u);
 
-        if (!u->service) {
-                char lu[DECIMAL_STR_MAX(uid_t) + 1], *service;
-
-                xsprintf(lu, UID_FMT, u->uid);
-                r = unit_name_build("user", lu, ".service", &service);
-                if (r < 0)
-                        return log_error_errno(r, "Failed to build service name: %m");
+        u->service_job = mfree(u->service_job);
 
-                r = manager_start_unit(
-                                u->manager,
-                                service,
-                                &error,
-                                &job);
-                if (r < 0) {
-                        log_error_errno(r, "Failed to start user service, ignoring: %s", bus_error_message(&error, r));
-                        free(service);
-                        /* we don't fail due to this, let's try to continue */
-                } else {
-                        u->service = service;
-
-                        free(u->service_job);
-                        u->service_job = job;
-                }
+        r = manager_start_unit(
+                        u->manager,
+                        u->service,
+                        &error,
+                        &job);
+        if (r < 0) {
+                /* we don't fail due to this, let's try to continue */
+                log_error_errno(r, "Failed to start user service, ignoring: %s", bus_error_message(&error, r));
+        } else {
+                u->service_job = job;
         }
 
-        if (u->service)
-                (void) hashmap_put(u->manager->user_units, u->service, u);
-
         return 0;
 }
 
@@ -526,9 +517,6 @@ static int user_stop_service(User *u) {
 
         assert(u);
 
-        if (!u->service)
-                return 0;
-
         r = manager_stop_unit(u->manager, u->service, &error, &job);
         if (r < 0) {
                 log_error("Failed to stop user service: %s", bus_error_message(&error, r));
-- 
2.39.2