use __WNOTHREAD w/ waitpid

I learned about this flag on my previous job; basically, it should be
enabled by default IMO, so that the thread doesn't receive signals from
other threads' children.

Here, it doesn't matter too much, since we're waiting for a specific
child. However, if we were to use waitpid(-1, ...), it would be
essential to use this flag. Still, even here, it's good to have this on.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/process.c b/src/process.c
index 732ca50..f800ad4 100644
--- a/src/process.c
+++ b/src/process.c
@@ -34,7 +34,7 @@ static int wait_for_child(pid_t pid, int *ec)
 {
 	int status;
 
-	pid_t ret = waitpid(pid, &status, 0);
+	pid_t ret = waitpid(pid, &status, __WNOTHREAD);
 	if (ret < 0) {
 		log_errno("waitpid");
 		return ret;