[Bug libc/10609] New: openat (and *at friends) fail to detect ENOENT

["ebb9 at byu dot net" <sourceware-bugzilla at sourceware dot org>]

On older kernels, when __have_atfcts is false, the /proc/self/fd/%d/%s fallback
is used unconditionally, even when %s is the empty string.  This ends up opening
fd (for openat), a successful stat of fd (for fstatat), etc, instead of failing
with ENOENT.

#include <fcntl.h>
int
main()
{
  int fd = open (".", O_RDONLY);
  if (openat (fd, "", O_RDONLY) != -1 || errno != ENOENT)
    puts ("failed");
  return 0;
}

-- 
           Summary: openat (and *at friends) fail to detect ENOENT
           Product: glibc
           Version: 2.10
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
        AssignedTo: drepper at redhat dot com
        ReportedBy: ebb9 at byu dot net
                CC: glibc-bugs at sources dot redhat dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=10609

------- You are receiving this mail because: -------
You are on the CC list for the bug, or are watching someone who is.