1 /* Target directory operands for coreutils
2
3 Copyright 2022-2023 Free Software Foundation, Inc.
4
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation, either version 3 of the License, or
8 (at your option) any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <https://www.gnu.org/licenses/>. */
17
18 #include <fcntl.h>
19 #include <sys/stat.h>
20
21 #ifndef _GL_INLINE_HEADER_BEGIN
22 # error "Please include config.h first."
23 #endif
24 _GL_INLINE_HEADER_BEGIN
25 #ifndef TARGETDIR_INLINE
26 # define TARGETDIR_INLINE _GL_INLINE
27 #endif
28
29 /* Return a file descriptor open to FILE, for use in openat.
30 As an optimization, return AT_FDCWD if FILE must be the working directory.
31 As a side effect, possibly set *ST to the file's status.
32 Fail and set errno if FILE is not a directory.
33 On failure return -2 if AT_FDCWD is -1, -1 otherwise. */
34 extern int target_directory_operand (char const *file, struct stat *st);
35
36 /* Return true if FD represents success for target_directory_operand. */
37 TARGETDIR_INLINE _GL_ATTRIBUTE_PURE bool
target_dirfd_valid(int fd)38 target_dirfd_valid (int fd)
39 {
40 return fd != -1 - (AT_FDCWD == -1);
41 }
42
43 _GL_INLINE_HEADER_END
44