getpid/vfork broken

[Andreas Schwab]

getpid does not return the correct result after vfork:

$ cat getpid.c
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>

int
main (void)
{
  if (vfork () == 0)
    {
      printf ("%d\n", getpid ());
      exit (0);
    }
  wait (0);
  if (vfork () == 0)
    {
      printf ("%d\n", getpid ());
      exit (0);
    }
  wait (0);
  printf ("%d\n", getpid ());
  return 0;
}
$ ./getpid
31302
31302
31302

Note that the number is actually the pid of the first child, not the
parent.

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux AG, Maxfeldstraße 5, 90409 Nürnberg, Germany
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