1 /* Create an inode relative to an open directory.
2 Copyright (C) 2009-2024 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 <https://www.gnu.org/licenses/>. */
17 /* written by Eric Blake */
33 rpl_mknodat (int fd
, char const *file
, mode_t mode
, dev_t dev
)
36 /* Use the original mknodat(), but correct the trailing slash handling. */
37 size_t len
= strlen (file
);
38 if (len
&& file
[len
- 1] == '/')
42 if (fstatat (fd
, file
, &st
, AT_SYMLINK_NOFOLLOW
) < 0)
44 if (errno
== EOVERFLOW
)
45 /* It's surely a file, not a directory. */
50 /* It's a directory, otherwise fstatat() would have reported an error
57 return mknodat (fd
, file
, mode
, dev
);
66 /* Mingw lacks mknod, so this wrapper is trivial. */
69 mknodat (_GL_UNUSED
int fd
, _GL_UNUSED
char const *path
,
70 _GL_UNUSED mode_t mode
, _GL_UNUSED dev_t dev
)
78 /* Create a file system node FILE relative to directory FD, with
79 access permissions and file type in MODE, and device type in DEV.
80 Usually, non-root applications can only create named fifos, with
81 DEV set to 0. If possible, create the node without changing the
82 working directory. Otherwise, resort to using save_cwd/fchdir,
83 then mknod/restore_cwd. If either the save_cwd or the restore_cwd
84 fails, then give a diagnostic and exit nonzero. */
86 # define AT_FUNC_NAME mknodat
87 # define AT_FUNC_F1 mknod
88 # define AT_FUNC_POST_FILE_PARAM_DECLS , mode_t mode, dev_t dev
89 # define AT_FUNC_POST_FILE_ARGS , mode, dev
93 # undef AT_FUNC_POST_FILE_PARAM_DECLS
94 # undef AT_FUNC_POST_FILE_ARGS