From: Bobby Bingham <koorogi@koorogi.info>
Date: Fri, 10 Nov 2017 20:59:18 +0000 (-0600)
Subject: pthread_atfork/fork regression test
X-Git-Url: http://nsz.repo.hu/git/?p=libc-test;a=commitdiff_plain;h=735f0ce7e431c588840f6fb832b12f6b64d7b378

pthread_atfork/fork regression test
---

diff --git a/src/regression/pthread_atfork-errno-clobber.c b/src/regression/pthread_atfork-errno-clobber.c
new file mode 100644
index 0000000..ab3b378
--- /dev/null
+++ b/src/regression/pthread_atfork-errno-clobber.c
@@ -0,0 +1,32 @@
+#include <errno.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/resource.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include "test.h"
+
+#define TEST(c, ...) ((c) ? 1 : (t_error(#c" failed: " __VA_ARGS__),0))
+
+static void handler_errno(void)
+{
+	errno = 0;
+}
+
+int main(void)
+{
+	t_setrlim(RLIMIT_NPROC, 0);
+	pthread_atfork(handler_errno, handler_errno, handler_errno);
+
+	pid_t pid;
+	if (!TEST((pid = fork()) == -1, "fork succeeded despite rlimit\n")) {
+		if (!pid) _exit(0);
+		while (waitpid(pid, NULL, 0)<0 && errno==EINTR);
+	} else {
+		TEST(errno != 0, "fork failed but errno was clobbered\n");
+	}
+
+	return t_status;
+}
+