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authorTon Voon <tonvoon@users.sourceforge.net>2007-01-24 22:47:25 (GMT)
committerTon Voon <tonvoon@users.sourceforge.net>2007-01-24 22:47:25 (GMT)
commitfe856aa957978504137c1d425815d4ed8a22be40 (patch)
treea5bb46ce0e64b2056f75700eadbf27aba7c39418 /lib/safe-read.c
parent210f39bc84cfbb21cd72dc054e43f13815ee0616 (diff)
downloadmonitoring-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.c80
1 files changed, 0 insertions, 80 deletions
diff --git a/lib/safe-read.c b/lib/safe-read.c
deleted file mode 100644
index 9caf846..0000000
--- a/lib/safe-read.c
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@@ -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. */
58size_t
59safe_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}