tree-wide: port various places to use TAKE_PID()

src/core/execute.c

@@ -2248,8 +2248,7 @@ static int setup_private_users(uid_t ouid, gid_t ogid, uid_t uid, gid_t gid) {
         if (n != 0) /* on success we should have read 0 bytes */
                 return -EIO;
 
-        r = wait_for_terminate_and_check("(sd-userns)", pid, 0);
-        pid = 0;
+        r = wait_for_terminate_and_check("(sd-userns)", TAKE_PID(pid), 0);
         if (r < 0)
                 return r;
         if (r != EXIT_SUCCESS) /* If something strange happened with the child, let's consider this fatal, too */

src/core/mount.c

@@ -236,8 +236,7 @@ static void mount_unwatch_control_pid(Mount *m) {
         if (m->control_pid <= 0)
                 return;
 
-        unit_unwatch_pid(UNIT(m), m->control_pid);
-        m->control_pid = 0;
+        unit_unwatch_pid(UNIT(m), TAKE_PID(m->control_pid));
 }
 
 static void mount_parameters_done(MountParameters *p) {

src/core/service.c

@@ -130,8 +130,7 @@ static void service_unwatch_control_pid(Service *s) {
         if (s->control_pid <= 0)
                 return;
 
-        unit_unwatch_pid(UNIT(s), s->control_pid);
-        s->control_pid = 0;
+        unit_unwatch_pid(UNIT(s), TAKE_PID(s->control_pid));
 }
 
 static void service_unwatch_main_pid(Service *s) {
@@ -140,8 +139,7 @@ static void service_unwatch_main_pid(Service *s) {
         if (s->main_pid <= 0)
                 return;
 
-        unit_unwatch_pid(UNIT(s), s->main_pid);
-        s->main_pid = 0;
+        unit_unwatch_pid(UNIT(s), TAKE_PID(s->main_pid));
 }
 
 static void service_unwatch_pid_file(Service *s) {

src/core/socket.c

@@ -109,8 +109,7 @@ static void socket_unwatch_control_pid(Socket *s) {
         if (s->control_pid <= 0)
                 return;
 
-        unit_unwatch_pid(UNIT(s), s->control_pid);
-        s->control_pid = 0;
+        unit_unwatch_pid(UNIT(s), TAKE_PID(s->control_pid));
 }
 
 static void socket_cleanup_fd_list(SocketPort *p) {

src/core/swap.c

@@ -155,8 +155,7 @@ static void swap_unwatch_control_pid(Swap *s) {
         if (s->control_pid <= 0)
                 return;
 
-        unit_unwatch_pid(UNIT(s), s->control_pid);
-        s->control_pid = 0;
+        unit_unwatch_pid(UNIT(s), TAKE_PID(s->control_pid));
 }
 
 static void swap_done(Unit *u) {

src/import/export-tar.c

@@ -147,8 +147,7 @@ static int tar_export_finish(TarExport *e) {
         assert(e->tar_fd >= 0);
 
         if (e->tar_pid > 0) {
-                r = wait_for_terminate_and_check("tar", e->tar_pid, WAIT_LOG);
-                e->tar_pid = 0;
+                r = wait_for_terminate_and_check("tar", TAKE_PID(e->tar_pid), WAIT_LOG);
                 if (r < 0)
                         return r;
                 if (r != EXIT_SUCCESS)

src/import/import-tar.c

@@ -167,8 +167,7 @@ static int tar_import_finish(TarImport *i) {
         i->tar_fd = safe_close(i->tar_fd);
 
         if (i->tar_pid > 0) {
-                r = wait_for_terminate_and_check("tar", i->tar_pid, WAIT_LOG);
-                i->tar_pid = 0;
+                r = wait_for_terminate_and_check("tar", TAKE_PID(i->tar_pid), WAIT_LOG);
                 if (r < 0)
                         return r;
                 if (r != EXIT_SUCCESS)

src/import/pull-common.c

@@ -482,8 +482,7 @@ static int verify_gpg(
 
         gpg_pipe[1] = safe_close(gpg_pipe[1]);
 
-        r = wait_for_terminate_and_check("gpg", pid, WAIT_LOG_ABNORMAL);
-        pid = 0;
+        r = wait_for_terminate_and_check("gpg", TAKE_PID(pid), WAIT_LOG_ABNORMAL);
         if (r < 0)
                 goto finish;
         if (r != EXIT_SUCCESS)

src/import/pull-tar.c

@@ -369,8 +369,7 @@ static void tar_pull_job_on_finished(PullJob *j) {
         pull_job_close_disk_fd(i->settings_job);
 
         if (i->tar_pid > 0) {
-                r = wait_for_terminate_and_check("tar", i->tar_pid, WAIT_LOG);
-                i->tar_pid = 0;
+                r = wait_for_terminate_and_check("tar", TAKE_PID(i->tar_pid), WAIT_LOG);
                 if (r < 0)
                         goto finish;
                 if (r != EXIT_SUCCESS) {

src/libsystemd/sd-bus/sd-bus.c

@@ -1082,10 +1082,10 @@ static int bus_parse_next_address(sd_bus *b) {
 }
 
 static void bus_kill_exec(sd_bus *bus) {
-        if (pid_is_valid(bus->busexec_pid) > 0) {
-                sigterm_wait(bus->busexec_pid);
-                bus->busexec_pid = 0;
-        }
+        if (!pid_is_valid(bus->busexec_pid))
+                return;
+
+        sigterm_wait(TAKE_PID(bus->busexec_pid));
 }
 
 static int bus_start_address(sd_bus *b) {

src/nspawn/nspawn.c

@@ -5248,8 +5248,7 @@ static int run_container(
                 }
         }
 
-        r = wait_for_container(*pid, &container_status);
-        *pid = 0;
+        r = wait_for_container(TAKE_PID(*pid), &container_status);
 
         /* Tell machined that we are gone. */
         if (bus)

src/shared/pager.c

@@ -286,7 +286,7 @@ void pager_close(void) {
         stdout_redirected = stderr_redirected = false;
 
         (void) kill(pager_pid, SIGCONT);
-        (void) wait_for_terminate(pager_pid, NULL);
+        (void) wait_for_terminate(TAKE_PID(pager_pid), NULL);
         pager_pid = 0;
 }
 

src/shared/spawn-ask-password-agent.c

@@ -43,9 +43,7 @@ void ask_password_agent_close(void) {
                 return;
 
         /* Inform agent that we are done */
-        (void) kill_and_sigcont(agent_pid, SIGTERM);
-        (void) wait_for_terminate(agent_pid, NULL);
-        agent_pid = 0;
+        sigterm_wait(TAKE_PID(agent_pid));
 }
 
 int ask_password_agent_open_if_enabled(BusTransport transport, bool ask_password) {

src/shared/spawn-polkit-agent.c

@@ -69,9 +69,7 @@ void polkit_agent_close(void) {
                 return;
 
         /* Inform agent that we are done */
-        (void) kill_and_sigcont(agent_pid, SIGTERM);
-        (void) wait_for_terminate(agent_pid, NULL);
-        agent_pid = 0;
+        sigterm_wait(TAKE_PID(agent_pid));
 }
 
 #else