diff options
| -rw-r--r-- | src/openrc/rc.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/openrc/rc.c b/src/openrc/rc.c index d162b514..b6bb811b 100644 --- a/src/openrc/rc.c +++ b/src/openrc/rc.c @@ -351,16 +351,31 @@ static char *get_krunlevel(void) static void add_pid(pid_t pid) { + sigset_t sset, old; RC_PID *p = xmalloc(sizeof(*p)); p->pid = pid; + + /* this list will be accessed inside the SIGCHLD signal handler. + * so we need to ensure that the SIGCHLD handler doesn't get invoked + * while the list is at an inconsistent state. + */ + sigemptyset(&sset); + sigaddset(&sset, SIGCHLD); + sigprocmask(SIG_SETMASK, &sset, &old); LIST_INSERT_HEAD(&service_pids, p, entries); + sigprocmask(SIG_SETMASK, &old, NULL); } static void remove_pid(pid_t pid, bool inside_signal) { + sigset_t sset, old; RC_PID *p, *tmp; + /* same rationale for blocking SIGCHLD as add_pid() */ + sigemptyset(&sset); + sigaddset(&sset, SIGCHLD); + sigprocmask(SIG_SETMASK, &sset, &old); LIST_FOREACH(p, &service_pids, entries) { if (p->pid == pid) { LIST_REMOVE(p, entries); @@ -375,6 +390,7 @@ remove_pid(pid_t pid, bool inside_signal) free(p); } } + sigprocmask(SIG_SETMASK, &old, NULL); } static void |