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Date: Fri, 10 Nov 2017 14:59:18 -0600
From: Bobby Bingham <koorogi@...rogi.info>
To: musl@...ts.openwall.com
Subject: [PATCH] [libc-test] pthread_atfork/fork regression test

---
 src/regression/pthread_atfork-errno-clobber.c | 32 +++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 src/regression/pthread_atfork-errno-clobber.c

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;
+}
+
--
2.15.0

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