| 1 | /* Change the protections of file relative to an open directory.
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| 2 | Copyright (C) 2006 Free Software Foundation, Inc.
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| 3 |
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| 4 | This program is free software; you can redistribute it and/or modify
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| 5 | it under the terms of the GNU General Public License as published by
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| 6 | the Free Software Foundation; either version 2, or (at your option)
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| 7 | any later version.
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| 8 |
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| 9 | This program is distributed in the hope that it will be useful,
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 12 | GNU General Public License for more details.
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| 13 |
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| 14 | You should have received a copy of the GNU General Public License
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| 15 | along with this program; if not, write to the Free Software Foundation,
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| 16 | Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
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| 17 |
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| 18 | /* written by Jim Meyering */
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| 19 |
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| 20 | #include <config.h>
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| 21 |
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| 22 | #include "openat.h"
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| 23 | #include "dirname.h" /* solely for definition of IS_ABSOLUTE_FILE_NAME */
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| 24 | #include "save-cwd.h"
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| 25 | #include "openat-priv.h"
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| 26 |
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| 27 | #ifndef HAVE_LCHMOD
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| 28 | /* Use a different name, to avoid conflicting with any
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| 29 | system-supplied declaration. */
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| 30 | # undef lchmod
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| 31 | # define lchmod lchmod_rpl
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| 32 | static int lchmod (char const *f, mode_t m) { errno = ENOSYS; return -1; }
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| 33 | #endif
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| 34 |
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| 35 | /* Solaris 10 has no function like this.
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| 36 | Invoke chmod or lchmod on file, FILE, using mode MODE, in the directory
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| 37 | open on descriptor FD. If possible, do it without changing the
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| 38 | working directory. Otherwise, resort to using save_cwd/fchdir,
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| 39 | then mkdir/restore_cwd. If either the save_cwd or the restore_cwd
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| 40 | fails, then give a diagnostic and exit nonzero.
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| 41 | Note that an attempt to use a FLAG value of AT_SYMLINK_NOFOLLOW
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| 42 | on a system without lchmod support causes this function to fail. */
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| 43 |
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| 44 | #define AT_FUNC_NAME fchmodat
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| 45 | #define AT_FUNC_F1 lchmod
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| 46 | #define AT_FUNC_F2 chmod
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| 47 | #define AT_FUNC_USE_F1_COND flag == AT_SYMLINK_NOFOLLOW
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| 48 | #define AT_FUNC_POST_FILE_PARAM_DECLS , mode_t mode, int flag
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| 49 | #define AT_FUNC_POST_FILE_ARGS , mode
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| 50 | #include "at-func.c"
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