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author | Ton Voon <tonvoon@users.sourceforge.net> | 2006-07-11 12:38:09 +0000 |
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committer | Ton Voon <tonvoon@users.sourceforge.net> | 2006-07-11 12:38:09 +0000 |
commit | df23fd75267c830f85a74cfde3020981c37e82a5 (patch) | |
tree | d7db53794b2765c29eb4710c7e40fda2a06b11a2 /lib/fd-safer.c | |
parent | 6267f1036777d505bd6a1e8c2a5d9f76690f9db0 (diff) | |
download | monitoring-plugins-df23fd75267c830f85a74cfde3020981c37e82a5.tar.gz |
Extra files from coreutils required for getloadavg.c to compile
on Tru64 (Ciro Iriarte - 1520331)
git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/nagiosplug/trunk@1446 f882894a-f735-0410-b71e-b25c423dba1c
Diffstat (limited to 'lib/fd-safer.c')
-rw-r--r-- | lib/fd-safer.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/lib/fd-safer.c b/lib/fd-safer.c new file mode 100644 index 00000000..5933bcbd --- /dev/null +++ b/lib/fd-safer.c | |||
@@ -0,0 +1,59 @@ | |||
1 | /* Return a safer copy of a file descriptor. | ||
2 | |||
3 | Copyright (C) 2005 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 2, or (at your option) | ||
8 | 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, write to the Free Software Foundation, | ||
17 | Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ | ||
18 | |||
19 | /* Written by Paul Eggert. */ | ||
20 | |||
21 | #ifdef HAVE_CONFIG_H | ||
22 | # include <config.h> | ||
23 | #endif | ||
24 | |||
25 | #include "unistd-safer.h" | ||
26 | |||
27 | #include <errno.h> | ||
28 | |||
29 | #include <unistd.h> | ||
30 | #ifndef STDIN_FILENO | ||
31 | # define STDIN_FILENO 0 | ||
32 | #endif | ||
33 | #ifndef STDERR_FILENO | ||
34 | # define STDERR_FILENO 2 | ||
35 | #endif | ||
36 | |||
37 | /* Return FD, unless FD would be a copy of standard input, output, or | ||
38 | error; in that case, return a duplicate of FD, closing FD. On | ||
39 | failure to duplicate, close FD, set errno, and return -1. Preserve | ||
40 | errno if FD is negative, so that the caller can always inspect | ||
41 | errno when the returned value is negative. | ||
42 | |||
43 | This function is usefully wrapped around functions that return file | ||
44 | descriptors, e.g., fd_safer (open ("file", O_RDONLY)). */ | ||
45 | |||
46 | int | ||
47 | fd_safer (int fd) | ||
48 | { | ||
49 | if (STDIN_FILENO <= fd && fd <= STDERR_FILENO) | ||
50 | { | ||
51 | int f = dup_safer (fd); | ||
52 | int e = errno; | ||
53 | close (fd); | ||
54 | errno = e; | ||
55 | fd = f; | ||
56 | } | ||
57 | |||
58 | return fd; | ||
59 | } | ||