pthread_atfork/fork regression test

[libc-test] / 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 (file)
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;
+}
+