Two snapshot bugs

[Robinow, David]

> So 'getcwd (NULL, -1)' should return something but 'getcwd 
> (NULL, 0)', IMO,
> should not.
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
int main()
{
   char *dir = getcwd(NULL, 0);
   perror("Error =");
   printf("getcwd=%s\n", dir);

}
 Sets EINVAL in Irix.
 Sets EINVAL in SunOS 5.6
 Looks like "getcwd" returns the right thing.  Should errno be set?

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