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authorUlrich Drepper <drepper@redhat.com>2009-10-29 21:33:26 -0700
committerUlrich Drepper <drepper@redhat.com>2009-10-29 21:33:26 -0700
commit801720e63b20e3b8215764ff0d68a29534ca7e62 (patch)
treeb855ff7b284eadc784013c078f54978464687243 /sysdeps/unix/sysv/linux/fchmodat.c
parent584715c3a9b0030729e0a8504c820b3bd8d9353d (diff)
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Fix compat handling in *at functions.
When passed an empty string for the filename, the compat code
using /proc in all *at functions did the wrong thing.
Diffstat (limited to 'sysdeps/unix/sysv/linux/fchmodat.c')
-rw-r--r--sysdeps/unix/sysv/linux/fchmodat.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/sysdeps/unix/sysv/linux/fchmodat.c b/sysdeps/unix/sysv/linux/fchmodat.c
index 8b420153f1..051691230d 100644
--- a/sysdeps/unix/sysv/linux/fchmodat.c
+++ b/sysdeps/unix/sysv/linux/fchmodat.c
@@ -1,5 +1,5 @@
 /* Change the protections of file relative to open directory.  Linux version.
-   Copyright (C) 2006 Free Software Foundation, Inc.
+   Copyright (C) 2006, 2009 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -71,6 +71,12 @@ fchmodat (fd, file, mode, flag)
   if (fd != AT_FDCWD && file[0] != '/')
     {
       size_t filelen = strlen (file);
+      if (__builtin_expect (filelen == 0, 0))
+	{
+	  __set_errno (ENOENT);
+	  return -1;
+	}
+
       static const char procfd[] = "/proc/self/fd/%d/%s";
       /* Buffer for the path name we are going to use.  It consists of
 	 - the string /proc/self/fd/