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service: prevent registering control pids as the main pid

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We assume a process can be only one of the two in service_sigchld_event.
This commit is contained in:
Jouke Witteveen 2016-11-26 10:16:47 +01:00
parent 71e529fcf1
commit 3c9512c71d
1 changed files with 2 additions and 0 deletions
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src/core/service.c
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@ -3071,6 +3071,8 @@ static void service_notify_message(Unit *u, pid_t pid, char **tags, FDSet *fds)
if (e && IN_SET(s->state, SERVICE_START, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD)) {
if (parse_pid(e, &pid) < 0)
log_unit_warning(u, "Failed to parse MAINPID= field in notification message: %s", e);
else if (pid == s->control_pid)
log_unit_warning(u, "A control process cannot also be the main process");
else {
service_set_main_pid(s, pid);
unit_watch_pid(UNIT(s), pid);