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authorRincewindsHat <12514511+RincewindsHat@users.noreply.github.com>2023-01-31 14:46:01 +0100
committerRincewindsHat <12514511+RincewindsHat@users.noreply.github.com>2023-01-31 14:46:01 +0100
commite8bd88d1fcded01ccd066572eeaae1b507989cb3 (patch)
treec8e7be6c07c6f635f6e803e6a6ba9e7a95fee7c0 /gl/safe-read.c
parent2ad962c13473607ca0d974bfaa516a0ed53ec73d (diff)
downloadmonitoring-plugins-e8bd88d1fcded01ccd066572eeaae1b507989cb3.tar.gz
Sync with the latest Gnulib code 668c0b8ffa
Diffstat (limited to 'gl/safe-read.c')
-rw-r--r--gl/safe-read.c77
1 files changed, 0 insertions, 77 deletions
diff --git a/gl/safe-read.c b/gl/safe-read.c
deleted file mode 100644
index 6a48c0cc..00000000
--- a/gl/safe-read.c
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@@ -1,77 +0,0 @@
1/* An interface to read and write that retries after interrupts.
2
3 Copyright (C) 1993-1994, 1998, 2002-2006, 2009-2013 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 3 of the License, or
9 (at your option) 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, see <http://www.gnu.org/licenses/>. */
18
19#include <config.h>
20
21/* Specification. */
22#ifdef SAFE_WRITE
23# include "safe-write.h"
24#else
25# include "safe-read.h"
26#endif
27
28/* Get ssize_t. */
29#include <sys/types.h>
30#include <unistd.h>
31
32#include <errno.h>
33
34#ifdef EINTR
35# define IS_EINTR(x) ((x) == EINTR)
36#else
37# define IS_EINTR(x) 0
38#endif
39
40#include <limits.h>
41
42#ifdef SAFE_WRITE
43# define safe_rw safe_write
44# define rw write
45#else
46# define safe_rw safe_read
47# define rw read
48# undef const
49# define const /* empty */
50#endif
51
52/* Read(write) up to COUNT bytes at BUF from(to) descriptor FD, retrying if
53 interrupted. Return the actual number of bytes read(written), zero for EOF,
54 or SAFE_READ_ERROR(SAFE_WRITE_ERROR) upon error. */
55size_t
56safe_rw (int fd, void const *buf, size_t count)
57{
58 /* Work around a bug in Tru64 5.1. Attempting to read more than
59 INT_MAX bytes fails with errno == EINVAL. See
60 <http://lists.gnu.org/archive/html/bug-gnu-utils/2002-04/msg00010.html>.
61 When decreasing COUNT, keep it block-aligned. */
62 enum { BUGGY_READ_MAXIMUM = INT_MAX & ~8191 };
63
64 for (;;)
65 {
66 ssize_t result = rw (fd, buf, count);
67
68 if (0 <= result)
69 return result;
70 else if (IS_EINTR (errno))
71 continue;
72 else if (errno == EINVAL && BUGGY_READ_MAXIMUM < count)
73 count = BUGGY_READ_MAXIMUM;
74 else
75 return result;
76 }
77}