/* Stub for readlink().
- Copyright (C) 2003-2007, 2009 Free Software Foundation, Inc.
+ Copyright (C) 2003-2007, 2009-2013 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
such as DJGPP 2.03 and mingw32. */
ssize_t
-readlink (const char *name, char *buf _UNUSED_PARAMETER_,
- size_t bufsize _UNUSED_PARAMETER_)
+readlink (const char *name, char *buf _GL_UNUSED,
+ size_t bufsize _GL_UNUSED)
{
struct stat statbuf;
# undef readlink
/* readlink() wrapper that uses correct types, for systems like cygwin
- 1.5.x where readlink returns int. */
+ 1.5.x where readlink returns int, and which rejects trailing slash,
+ for Solaris 9. */
ssize_t
rpl_readlink (const char *name, char *buf, size_t bufsize)
{
+# if READLINK_TRAILING_SLASH_BUG
+ size_t len = strlen (name);
+ if (len && name[len - 1] == '/')
+ {
+ /* Even if name without the slash is a symlink to a directory,
+ both lstat() and stat() must resolve the trailing slash to
+ the directory rather than the symlink. We can therefore
+ safely use stat() to distinguish between EINVAL and
+ ENOTDIR/ENOENT, avoiding extra overhead of rpl_lstat(). */
+ struct stat st;
+ if (stat (name, &st) == 0)
+ errno = EINVAL;
+ return -1;
+ }
+# endif /* READLINK_TRAILING_SLASH_BUG */
return readlink (name, buf, bufsize);
}