Ticket #19056: foo.c

#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>

int
main ()
{
  int fail = 0;

  {
    errno = 0;
    int ret = linkat (-1, "foo", AT_FDCWD, "bar", 0);

    if (ret >= 0)
      printf ("ret = %d\n", ret);
    else if (errno == EBADF)
      printf ("ret = %d, errno == EBADF\n", ret);
    else
      printf ("ret = %d, errno == %s\n", ret, strerror (errno));

    fail |= !(ret < 0 && errno == EBADF);
  }

  {
    errno = 0;
    int ret = linkat (AT_FDCWD, "foo", -1, "bar", 0);

    if (ret >= 0)
      printf ("ret = %d\n", ret);
    else if (errno == EBADF)
      printf ("ret = %d, errno == EBADF\n", ret);
    else
      printf ("ret = %d, errno == %s\n", ret, strerror (errno));

    fail |= !(ret < 0 && errno == EBADF);
  }

  assert (!fail);
  printf ("OK\n");
}