Bug#785404: hurd: opendir("/dev/null") succeeds

[Richard Kettlewell <rjk@greenend.org.uk>]

Package: libc0.3
Version: 2.19-18+b1

richard@heceptor:~/junk$ cat t.c
#include <dirent.h>
#include <assert.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>

int main() {
  DIR *dp = opendir("/dev/null");
  printf("%p\n", dp);
  struct dirent *de = readdir(dp);
  printf("%p %d %s\n", de, errno, strerror(errno));
  return 0;
}
richard@heceptor:~/junk$ gcc -o t t.c && ./t
0x804a0e0
(nil) 1073741844 Not a directory

ii  hurd           1:0.6-4      hurd-i386    GNU Hurd
ii  libc0.3:hurd-i 2.19-18+b1   hurd-i386    GNU C Library: Shared libraries

Based on Glibc history there used to be some defence against this, but
it was removed in 2006.

ttfn/rjk