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author | Holger Weiss <holger@zedat.fu-berlin.de> | 2013-08-19 23:27:12 +0200 |
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committer | Holger Weiss <holger@zedat.fu-berlin.de> | 2013-08-19 23:27:12 +0200 |
commit | 26fbe7f1e68bb0c96da32491efcf3696fe6c299b (patch) | |
tree | c4d95289187a64e9c7517bf73d8208026c3d2fb3 /gl/cloexec.c | |
parent | 5f79e3e9f62ca5487d9881973149136ba1d19d3e (diff) | |
download | monitoring-plugins-26fbe7f1e68bb0c96da32491efcf3696fe6c299b.tar.gz |
Sync with the latest Gnulib code (6f2d632)
Diffstat (limited to 'gl/cloexec.c')
-rw-r--r-- | gl/cloexec.c | 83 |
1 files changed, 0 insertions, 83 deletions
diff --git a/gl/cloexec.c b/gl/cloexec.c deleted file mode 100644 index 2d12efef..00000000 --- a/gl/cloexec.c +++ /dev/null | |||
@@ -1,83 +0,0 @@ | |||
1 | /* closexec.c - set or clear the close-on-exec descriptor flag | ||
2 | |||
3 | Copyright (C) 1991, 2004-2006, 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 | The code is taken from glibc/manual/llio.texi */ | ||
19 | |||
20 | #include <config.h> | ||
21 | |||
22 | #include "cloexec.h" | ||
23 | |||
24 | #include <errno.h> | ||
25 | #include <fcntl.h> | ||
26 | #include <unistd.h> | ||
27 | |||
28 | /* Set the `FD_CLOEXEC' flag of DESC if VALUE is true, | ||
29 | or clear the flag if VALUE is false. | ||
30 | Return 0 on success, or -1 on error with `errno' set. | ||
31 | |||
32 | Note that on MingW, this function does NOT protect DESC from being | ||
33 | inherited into spawned children. Instead, either use dup_cloexec | ||
34 | followed by closing the original DESC, or use interfaces such as | ||
35 | open or pipe2 that accept flags like O_CLOEXEC to create DESC | ||
36 | non-inheritable in the first place. */ | ||
37 | |||
38 | int | ||
39 | set_cloexec_flag (int desc, bool value) | ||
40 | { | ||
41 | #ifdef F_SETFD | ||
42 | |||
43 | int flags = fcntl (desc, F_GETFD, 0); | ||
44 | |||
45 | if (0 <= flags) | ||
46 | { | ||
47 | int newflags = (value ? flags | FD_CLOEXEC : flags & ~FD_CLOEXEC); | ||
48 | |||
49 | if (flags == newflags | ||
50 | || fcntl (desc, F_SETFD, newflags) != -1) | ||
51 | return 0; | ||
52 | } | ||
53 | |||
54 | return -1; | ||
55 | |||
56 | #else /* !F_SETFD */ | ||
57 | |||
58 | /* Use dup2 to reject invalid file descriptors; the cloexec flag | ||
59 | will be unaffected. */ | ||
60 | if (desc < 0) | ||
61 | { | ||
62 | errno = EBADF; | ||
63 | return -1; | ||
64 | } | ||
65 | if (dup2 (desc, desc) < 0) | ||
66 | /* errno is EBADF here. */ | ||
67 | return -1; | ||
68 | |||
69 | /* There is nothing we can do on this kind of platform. Punt. */ | ||
70 | return 0; | ||
71 | #endif /* !F_SETFD */ | ||
72 | } | ||
73 | |||
74 | |||
75 | /* Duplicates a file handle FD, while marking the copy to be closed | ||
76 | prior to exec or spawn. Returns -1 and sets errno if FD could not | ||
77 | be duplicated. */ | ||
78 | |||
79 | int | ||
80 | dup_cloexec (int fd) | ||
81 | { | ||
82 | return fcntl (fd, F_DUPFD_CLOEXEC, 0); | ||
83 | } | ||