1 /* Create a symlink relative to an open directory.
2 Copyright (C) 2009-2011 Free Software Foundation, Inc.
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
17 /* written by Eric Blake */
24 /* Mingw lacks symlink, and it is more efficient to provide a trivial
25 wrapper than to go through at-func.c to call rpl_symlink. */
30 symlinkat (char const *path1 _GL_UNUSED, int fd _GL_UNUSED,
31 char const *path2 _GL_UNUSED)
37 #else /* HAVE_SYMLINK */
39 /* Our openat helper functions expect the directory parameter first,
40 not second. These shims make life easier. */
42 /* Like symlink, but with arguments reversed. */
44 symlink_reversed (char const *file, char const *contents)
46 return symlink (contents, file);
49 /* Like symlinkat, but with arguments reversed. */
52 symlinkat_reversed (int fd, char const *file, char const *contents);
54 # define AT_FUNC_NAME symlinkat_reversed
55 # define AT_FUNC_F1 symlink_reversed
56 # define AT_FUNC_POST_FILE_PARAM_DECLS , char const *contents
57 # define AT_FUNC_POST_FILE_ARGS , contents
61 # undef AT_FUNC_POST_FILE_PARAM_DECLS
62 # undef AT_FUNC_POST_FILE_ARGS
64 /* Create a symlink FILE, in the directory open on descriptor FD,
65 holding CONTENTS. If possible, do it without changing the
66 working directory. Otherwise, resort to using save_cwd/fchdir,
67 then symlink/restore_cwd. If either the save_cwd or the restore_cwd
68 fails, then give a diagnostic and exit nonzero. */
71 symlinkat (char const *contents, int fd, char const *file)
73 return symlinkat_reversed (fd, file, contents);
76 #endif /* HAVE_SYMLINK */