text: /* Stub for readlink().
     Copyright (C) 2003-2007, 2009-2011 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
     the Free Software Foundation; either version 3 of the License, or
     (at your option) any later version.
  
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  
  #include <config.h>
  
  /* Specification.  */
  #include <unistd.h>
  
  #include <errno.h>
  #include <string.h>
  #include <sys/stat.h>
  
  #if !HAVE_READLINK
  
  /* readlink() substitute for systems that don't have a readlink() function,
     such as DJGPP 2.03 and mingw32.  */
  
  ssize_t
  readlink (const char *name, char *buf _GL_UNUSED,
            size_t bufsize _GL_UNUSED)
  {
    struct stat statbuf;
  
    /* In general we should use lstat() here, not stat().  But on platforms
       without symbolic links, lstat() - if it exists - would be equivalent to
       stat(), therefore we can use stat().  This saves us a configure check.  */
    if (stat (name, &statbuf) >= 0)
      errno = EINVAL;
    return -1;
  }
  
  #else /* HAVE_READLINK */
  
  # undef readlink
  
  /* readlink() wrapper that uses correct types, for systems like cygwin
     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);
  }
  
  #endif /* HAVE_READLINK */
  