Mercurial > gnulib
view lib/areadlink.c @ 17324:b1b7de2c4a71
careadlinkat: stop exporting careadlinkatcwd
Only Emacs used it directly, and Emacs no longer needs it.
* NEWS: Document this simplification.
* lib/areadlink.c (careadlinkatcwd): Move here from careadlinkat.c,
and make it static. Include <stdlib.h>, for abort, and unistd.h,
for readlink.
* lib/careadlinkat.c (careadlinkatcwd): Move to areadlink.c.
Don't include stdlib.h; no longer needed.
* lib/careadlinkat.h (careadlinkatcwd): Remove decl.
* lib/relocwrapper.c: Adjust comment to match new dependencies.
* modules/areadlink (Depends-on): Add readlink.
(Maintainer): Add self.
* modules/careadlinkat (Depends-on): Remove readlink.
author | Paul Eggert <eggert@cs.ucla.edu> |
---|---|
date | Fri, 08 Feb 2013 15:12:36 -0800 |
parents | e542fd46ad6f |
children | 344018b6e5d7 |
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line source
/* areadlink.c -- readlink wrapper to return the link name in malloc'd storage Unlike xreadlink and xreadlink_with_size, don't ever call exit. Copyright (C) 2001, 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 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/>. */ /* Written by Jim Meyering <jim@meyering.net> and Bruno Haible <bruno@clisp.org>. */ #include <config.h> /* Specification. */ #include "areadlink.h" #include "careadlinkat.h" #include <stdlib.h> #include <unistd.h> /* Get the symbolic link value of FILENAME and put it into BUFFER, with size BUFFER_SIZE. This function acts like readlink but has readlinkat's signature. */ static ssize_t careadlinkatcwd (int fd, char const *filename, char *buffer, size_t buffer_size) { /* FD must be AT_FDCWD here, otherwise the caller is using this function in contexts it was not meant for. */ if (fd != AT_FDCWD) abort (); return readlink (filename, buffer, buffer_size); } /* Call readlink to get the symbolic link value of FILENAME. Return a pointer to that NUL-terminated string in malloc'd storage. If readlink fails, return NULL and set errno. If allocation fails, or if the link value is longer than SIZE_MAX :-), return NULL and set errno to ENOMEM. */ char * areadlink (char const *filename) { return careadlinkat (AT_FDCWD, filename, NULL, 0, NULL, careadlinkatcwd); }