From 4df42163511182bfd6fc55e85250b93786dcce7e Mon Sep 17 00:00:00 2001
From: Rich Felker <dalias@aerifal.cx>
Date: Fri, 4 May 2018 13:18:51 -0400
Subject: [PATCH] remove incorrect ESRCH error from pthread_kill
posix documents in the rationale and future directions for
pthread_kill that, since the lifetime of the thread id for a joinable
thread lasts until it is joined, ESRCH is not a correct error for
pthread_kill to produce when the target thread has exited but not yet
been joined, and that conforming applications cannot attempt to detect
this state. future versions of the standard may explicitly require
that ESRCH not be returned for this case.
---
src/thread/pthread_kill.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/src/thread/pthread_kill.c b/src/thread/pthread_kill.c
index f0903420..0a139231 100644
--- a/src/thread/pthread_kill.c
+++ b/src/thread/pthread_kill.c
@@ -4,7 +4,8 @@ int pthread_kill(pthread_t t, int sig)
{
int r;
LOCK(t->killlock);
- r = t->dead ? ESRCH : -__syscall(SYS_tkill, t->tid, sig);
+ r = t->dead ? (sig+0U >= _NSIG ? EINVAL : 0)
+ : -__syscall(SYS_tkill, t->tid, sig);
UNLOCK(t->killlock);
return r;
}
--
2.40.0