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author | Ton Voon <tonvoon@users.sourceforge.net> | 2007-01-24 22:47:25 +0000 |
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committer | Ton Voon <tonvoon@users.sourceforge.net> | 2007-01-24 22:47:25 +0000 |
commit | fe856aa957978504137c1d425815d4ed8a22be40 (patch) | |
tree | a5bb46ce0e64b2056f75700eadbf27aba7c39418 /lib/safe-read.c | |
parent | 210f39bc84cfbb21cd72dc054e43f13815ee0616 (diff) | |
download | monitoring-plugins-fe856aa957978504137c1d425815d4ed8a22be40.tar.gz |
Sync with gnulib - lots of extraneous code removed in preference to GNU code
git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/nagiosplug/trunk@1580 f882894a-f735-0410-b71e-b25c423dba1c
Diffstat (limited to 'lib/safe-read.c')
-rw-r--r-- | lib/safe-read.c | 80 |
1 files changed, 0 insertions, 80 deletions
diff --git a/lib/safe-read.c b/lib/safe-read.c deleted file mode 100644 index 9caf8466..00000000 --- a/lib/safe-read.c +++ /dev/null | |||
@@ -1,80 +0,0 @@ | |||
1 | /* An interface to read and write that retries after interrupts. | ||
2 | |||
3 | Copyright (C) 1993, 1994, 1998, 2002, 2003, 2004, 2005 Free Software | ||
4 | Foundation, Inc. | ||
5 | |||
6 | This program is free software; you can redistribute it and/or modify | ||
7 | it under the terms of the GNU General Public License as published by | ||
8 | the Free Software Foundation; either version 2, or (at your option) | ||
9 | any later version. | ||
10 | |||
11 | This program is distributed in the hope that it will be useful, | ||
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
14 | GNU General Public License for more details. | ||
15 | |||
16 | You should have received a copy of the GNU General Public License | ||
17 | along with this program; if not, write to the Free Software Foundation, | ||
18 | Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ | ||
19 | |||
20 | #ifdef HAVE_CONFIG_H | ||
21 | # include <config.h> | ||
22 | #endif | ||
23 | |||
24 | /* Specification. */ | ||
25 | #ifdef SAFE_WRITE | ||
26 | # include "safe-write.h" | ||
27 | #else | ||
28 | # include "safe-read.h" | ||
29 | #endif | ||
30 | |||
31 | /* Get ssize_t. */ | ||
32 | #include <sys/types.h> | ||
33 | #include <unistd.h> | ||
34 | |||
35 | #include <errno.h> | ||
36 | |||
37 | #ifdef EINTR | ||
38 | # define IS_EINTR(x) ((x) == EINTR) | ||
39 | #else | ||
40 | # define IS_EINTR(x) 0 | ||
41 | #endif | ||
42 | |||
43 | #include <limits.h> | ||
44 | |||
45 | #ifdef SAFE_WRITE | ||
46 | # define safe_rw safe_write | ||
47 | # define rw write | ||
48 | #else | ||
49 | # define safe_rw safe_read | ||
50 | # define rw read | ||
51 | # undef const | ||
52 | # define const /* empty */ | ||
53 | #endif | ||
54 | |||
55 | /* Read(write) up to COUNT bytes at BUF from(to) descriptor FD, retrying if | ||
56 | interrupted. Return the actual number of bytes read(written), zero for EOF, | ||
57 | or SAFE_READ_ERROR(SAFE_WRITE_ERROR) upon error. */ | ||
58 | size_t | ||
59 | safe_rw (int fd, void const *buf, size_t count) | ||
60 | { | ||
61 | /* Work around a bug in Tru64 5.1. Attempting to read more than | ||
62 | INT_MAX bytes fails with errno == EINVAL. See | ||
63 | <http://lists.gnu.org/archive/html/bug-gnu-utils/2002-04/msg00010.html>. | ||
64 | When decreasing COUNT, keep it block-aligned. */ | ||
65 | enum { BUGGY_READ_MAXIMUM = INT_MAX & ~8191 }; | ||
66 | |||
67 | for (;;) | ||
68 | { | ||
69 | ssize_t result = rw (fd, buf, count); | ||
70 | |||
71 | if (0 <= result) | ||
72 | return result; | ||
73 | else if (IS_EINTR (errno)) | ||
74 | continue; | ||
75 | else if (errno == EINVAL && BUGGY_READ_MAXIMUM < count) | ||
76 | count = BUGGY_READ_MAXIMUM; | ||
77 | else | ||
78 | return result; | ||
79 | } | ||
80 | } | ||