service: optionally, call setsid() on services

3 files changed, 25 insertions, 7 deletions

diff --git a/execute.c b/execute.c
index 31e1bdc252..0374eaec5d 100644
--- a/execute.c
+++ b/execute.c
@@ -489,9 +489,16 @@ int exec_spawn(const ExecCommand *command,
                         goto fail;
                 }
 
-                if (setpgid(0, 0) < 0) {
-                        r = EXIT_PGID;
-                        goto fail;
+                if (context->new_session) {
+                        if (setsid() < 0) {
+                                r = EXIT_SETSID;
+                                goto fail;
+                        }
+                } else {
+                        if (setpgid(0, 0) < 0) {
+                                r = EXIT_PGID;
+                                goto fail;
+                        }
                 }
 
                 umask(context->umask);
@@ -710,6 +717,12 @@ void exec_context_init(ExecContext *c) {
         c->cpu_sched_set = false;
         CPU_ZERO(&c->cpu_affinity);
         c->cpu_affinity_set = false;
+        c->timer_slack_ns = 0;
+        c->timer_slack_ns_set = false;
+
+        c->cpu_sched_reset_on_fork = false;
+        c->non_blocking = false;
+        c->new_session = false;
 
         c->input = 0;
         c->output = 0;
@@ -790,11 +803,13 @@ void exec_context_dump(ExecContext *c, FILE* f, const char *prefix) {
                 "%sUMask: %04o\n"
                 "%sWorkingDirectory: %s\n"
                 "%sRootDirectory: %s\n"
-                "%sNonBlocking: %s\n",
+                "%sNonBlocking: %s\n"
+                "%sNewSession: %s\n",
                 prefix, c->umask,
                 prefix, c->working_directory ? c->working_directory : "/",
                 prefix, c->root_directory ? c->root_directory : "/",
-                prefix, yes_no(c->non_blocking));
+                prefix, yes_no(c->non_blocking),
+                prefix, yes_no(c->new_session));
 
         if (c->environment)
                 for (e = c->environment; *e; e++)
diff --git a/execute.h b/execute.h
index cb69bb3bd8..5099a82435 100644
--- a/execute.h
+++ b/execute.h
@@ -93,6 +93,7 @@ struct ExecContext {
 
         bool cpu_sched_reset_on_fork;
         bool non_blocking;
+        bool new_session;
 
         ExecInput input;
         ExecOutput output;
@@ -148,7 +149,8 @@ typedef enum ExitStatus {
         EXIT_GROUP,
         EXIT_USER,
         EXIT_CAPABILITIES,
-        EXIT_CGROUP
+        EXIT_CGROUP,   /* 220 */
+        EXIT_SETSID
 } ExitStatus;
 
 int exec_spawn(const ExecCommand *command,
diff --git a/load-fragment.c b/load-fragment.c
index c0972d04fb..bd84e8fe79 100644
--- a/load-fragment.c
+++ b/load-fragment.c
@@ -1145,7 +1145,8 @@ static int load_from_path(Unit *u, const char *path, UnitLoadState *new_state) {
                 { "LimitRTPRIO",            config_parse_limit,           &(context).rlimit[RLIMIT_RTPRIO],                section   }, \
                 { "LimitRTTIME",            config_parse_limit,           &(context).rlimit[RLIMIT_RTTIME],                section   }, \
                 { "NonBlocking",            config_parse_bool,            &(context).non_blocking,                         section   }, \
-                { "ControlGroup",           config_parse_cgroup,          u,                                               section   }  \
+                { "ControlGroup",           config_parse_cgroup,          u,                                               section   }, \
+                { "NewSession",             config_parse_bool,            &(context).new_session,                          section   }
 
         const ConfigItem items[] = {
                 { "Names",                  config_parse_names,           u,                                               "Meta"    },