diff options
Diffstat (limited to 'gl/fd-safer.c')
-rw-r--r-- | gl/fd-safer.c | 49 |
1 files changed, 0 insertions, 49 deletions
diff --git a/gl/fd-safer.c b/gl/fd-safer.c deleted file mode 100644 index c1c60005..00000000 --- a/gl/fd-safer.c +++ /dev/null | |||
@@ -1,49 +0,0 @@ | |||
1 | /* Return a safer copy of a file descriptor. | ||
2 | |||
3 | Copyright (C) 2005-2006, 2009-2010 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 <http://www.gnu.org/licenses/>. */ | ||
17 | |||
18 | /* Written by Paul Eggert. */ | ||
19 | |||
20 | #include <config.h> | ||
21 | |||
22 | #include "unistd-safer.h" | ||
23 | |||
24 | #include <errno.h> | ||
25 | #include <unistd.h> | ||
26 | |||
27 | /* Return FD, unless FD would be a copy of standard input, output, or | ||
28 | error; in that case, return a duplicate of FD, closing FD. On | ||
29 | failure to duplicate, close FD, set errno, and return -1. Preserve | ||
30 | errno if FD is negative, so that the caller can always inspect | ||
31 | errno when the returned value is negative. | ||
32 | |||
33 | This function is usefully wrapped around functions that return file | ||
34 | descriptors, e.g., fd_safer (open ("file", O_RDONLY)). */ | ||
35 | |||
36 | int | ||
37 | fd_safer (int fd) | ||
38 | { | ||
39 | if (STDIN_FILENO <= fd && fd <= STDERR_FILENO) | ||
40 | { | ||
41 | int f = dup_safer (fd); | ||
42 | int e = errno; | ||
43 | close (fd); | ||
44 | errno = e; | ||
45 | fd = f; | ||
46 | } | ||
47 | |||
48 | return fd; | ||
49 | } | ||