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2b778ceb | 1 | /* Copyright (C) 1991-2021 Free Software Foundation, Inc. |
478b92f0 | 2 | This file is part of the GNU C Library. |
28f540f4 | 3 | |
478b92f0 | 4 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
28f540f4 | 8 | |
478b92f0 UD |
9 | The GNU C Library 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 GNU | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
28f540f4 | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 15 | License along with the GNU C Library; if not, see |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
28f540f4 | 17 | |
28f540f4 RM |
18 | #include <stdio.h> |
19 | #include <unistd.h> | |
20 | #include <errno.h> | |
21 | ||
22 | /* Rename the file OLD to NEW. */ | |
23 | int | |
bd2260a2 | 24 | rename (const char *old, const char *new) |
28f540f4 RM |
25 | { |
26 | int save = errno; | |
c4029823 | 27 | if (__link (old, new) < 0) |
28f540f4 RM |
28 | { |
29 | if (errno == EEXIST) | |
30 | { | |
ba1ffaa1 | 31 | __set_errno (save); |
28f540f4 | 32 | /* Race condition, required for 1003.1 conformance. */ |
a04549c1 JM |
33 | if (__unlink (new) < 0 |
34 | || __link (old, new) < 0) | |
28f540f4 RM |
35 | return -1; |
36 | } | |
37 | else | |
38 | return -1; | |
39 | } | |
c4029823 | 40 | if (__unlink (old) < 0) |
28f540f4 RM |
41 | { |
42 | save = errno; | |
c4029823 UD |
43 | if (__unlink (new) == 0) |
44 | __set_errno (save); | |
28f540f4 RM |
45 | return -1; |
46 | } | |
47 | return 0; | |
48 | } |