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 | } | ||
