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authorLennart Poettering <lennart@poettering.net>2014-08-21 18:50:42 +0200
committerLennart Poettering <lennart@poettering.net>2014-08-21 18:50:42 +0200
commit96fb8242cc1ef6b0e28f6c86a4f57950095dd7f1 (patch)
treeab027af32c2452d075292817111425657d466f6e /src/core
parent1954ea346dc28226c0fffde848d49a297165b0a9 (diff)
service: allow services of Type=oneshot that specify no ExecStart= commands
This is useful for services that simply want to run something on shutdown, but not at bootup. They should only set ExecStop= but leave ExecStart= unset.
Diffstat (limited to 'src/core')
-rw-r--r--src/core/service.c39
1 files changed, 29 insertions, 10 deletions
diff --git a/src/core/service.c b/src/core/service.c
index 7d6ea73e05..1b864c4c8c 100644
--- a/src/core/service.c
+++ b/src/core/service.c
@@ -313,14 +313,23 @@ static int service_verify(Service *s) {
if (UNIT(s)->load_state != UNIT_LOADED)
return 0;
- if (!s->exec_command[SERVICE_EXEC_START]) {
- log_error_unit(UNIT(s)->id, "%s lacks ExecStart setting. Refusing.", UNIT(s)->id);
+ if (!s->exec_command[SERVICE_EXEC_START] && !s->exec_command[SERVICE_EXEC_STOP]) {
+ log_error_unit(UNIT(s)->id, "%s lacks both ExecStart= and ExecStop= setting. Refusing.", UNIT(s)->id);
return -EINVAL;
}
- if (s->type != SERVICE_ONESHOT &&
- s->exec_command[SERVICE_EXEC_START]->command_next) {
- log_error_unit(UNIT(s)->id, "%s has more than one ExecStart setting, which is only allowed for Type=oneshot services. Refusing.", UNIT(s)->id);
+ if (s->type != SERVICE_ONESHOT && !s->exec_command[SERVICE_EXEC_START]) {
+ log_error_unit(UNIT(s)->id, "%s has no ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.", UNIT(s)->id);
+ return -EINVAL;
+ }
+
+ if (!s->remain_after_exit && !s->exec_command[SERVICE_EXEC_START]) {
+ log_error_unit(UNIT(s)->id, "%s has no ExecStart= setting, which is only allowed for RemainAfterExit=yes services. Refusing.", UNIT(s)->id);
+ return -EINVAL;
+ }
+
+ if (s->type != SERVICE_ONESHOT && s->exec_command[SERVICE_EXEC_START]->command_next) {
+ log_error_unit(UNIT(s)->id, "%s has more than one ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.", UNIT(s)->id);
return -EINVAL;
}
@@ -410,8 +419,15 @@ static int service_load(Unit *u) {
if (r < 0)
return r;
- if (s->type == _SERVICE_TYPE_INVALID)
- s->type = s->bus_name ? SERVICE_DBUS : SERVICE_SIMPLE;
+ if (s->type == _SERVICE_TYPE_INVALID) {
+ /* Figure out a type automatically */
+ if (s->bus_name)
+ s->type = SERVICE_DBUS;
+ else if (s->exec_command[SERVICE_EXEC_START])
+ s->type = SERVICE_SIMPLE;
+ else
+ s->type = SERVICE_ONESHOT;
+ }
/* Oneshot services have disabled start timeout by default */
if (s->type == SERVICE_ONESHOT && !s->start_timeout_defined)
@@ -1309,9 +1325,6 @@ static void service_enter_start(Service *s) {
assert(s);
- assert(s->exec_command[SERVICE_EXEC_START]);
- assert(!s->exec_command[SERVICE_EXEC_START]->command_next || s->type == SERVICE_ONESHOT);
-
service_unwatch_control_pid(s);
service_unwatch_main_pid(s);
@@ -1332,6 +1345,12 @@ static void service_enter_start(Service *s) {
c = s->main_command = s->exec_command[SERVICE_EXEC_START];
}
+ if (!c) {
+ assert(s->type == SERVICE_ONESHOT);
+ service_enter_start_post(s);
+ return;
+ }
+
r = service_spawn(s,
c,
IN_SET(s->type, SERVICE_FORKING, SERVICE_DBUS, SERVICE_NOTIFY, SERVICE_ONESHOT) ? s->timeout_start_usec : 0,