File: setuid.c

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// RUN: %clang -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
//
// setuid(0) hangs on powerpc64 big endian.  When this is fixed remove
// the unsupported flag.
// https://llvm.org/bugs/show_bug.cgi?id=25799
//
// UNSUPPORTED: powerpc64-unknown-linux-gnu

#include <pthread.h>
#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>

// Setuid call used to hang because the new thread did not handle
// SIGSETXID signal. Note that we don't care whether setuid call succeeds
// or not.

static void *thread(void *arg) {
  (void)arg;
  sleep(1);
  return 0;
}

int main() {
  // Create another thread just for completeness of the picture.
  pthread_t th;
  pthread_create(&th, 0, thread, 0);
  setuid(0);
  pthread_join(th, 0);
  fprintf(stderr, "DONE\n");
  return 0;
}

// CHECK: DONE