octave-lojdl/gnulib-hg: lib/strerror

annotate lib/strerror_r.c @ 14862:42eaca1a6673

strerror_r: Fix comments. * lib/strerror_r.c (strerror_r): Update comments after 2011-06-01 commit.

author	Bruno Haible <bruno@clisp.org>
date	Sat, 04 Jun 2011 13:01:55 +0200
parents	bdc85db78f47
children	66b65ce5da39

rev	line source
13847 99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	1 /* strerror_r.c --- POSIX compatible system error routine
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	2
14079 97fc9a21a8fb maint: update almost all copyright ranges to include 2011 Jim Meyering <meyering@redhat.com> parents: 13885 diff changeset	3 Copyright (C) 2010-2011 Free Software Foundation, Inc.
13847 99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	4
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	5 This program is free software: you can redistribute it and/or modify
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	6 it under the terms of the GNU General Public License as published by
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	7 the Free Software Foundation; either version 3 of the License, or
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	8 (at your option) any later version.
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	9
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	10 This program is distributed in the hope that it will be useful,
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	11 but WITHOUT ANY WARRANTY; without even the implied warranty of
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	13 GNU General Public License for more details.
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	14
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	15 You should have received a copy of the GNU General Public License
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	17
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	18 /* Written by Bruno Haible <bruno@clisp.org>, 2010. */
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	19
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	20 #include <config.h>
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	21
14765 8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	22 /* Enable declaration of sys_nerr and sys_errlist in <errno.h> on NetBSD. */
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	23 #define _NETBSD_SOURCE 1
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	24
13847 99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	25 /* Specification. */
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	26 #include <string.h>
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	27
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	28 #include <errno.h>
14818 280af315920c strerror_r: fix missing header Eric Blake <eblake@redhat.com> parents: 14817 diff changeset	29 #include <stdio.h>
14851 e9cc9d33a1b8 strerror_r: fix includes for FreeBSD Eric Blake <eblake@redhat.com> parents: 14818 diff changeset	30 #include <stdlib.h>
13847 99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	31
14853 bdc85db78f47 strerror: drop strerror_r dependency Eric Blake <eblake@redhat.com> parents: 14851 diff changeset	32 #include "strerror-override.h"
14758 0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	33
14766 3618a75b519d strerror_r: fix on newer cygwin Eric Blake <eblake@redhat.com> parents: 14765 diff changeset	34 #if (__GLIBC__ >= 2 \|\| defined __UCLIBC__ \|\| defined __CYGWIN__) && HAVE___XPG_STRERROR_R /* glibc >= 2.3.4, cygwin >= 1.7.9 */
3618a75b519d strerror_r: fix on newer cygwin Eric Blake <eblake@redhat.com> parents: 14765 diff changeset	35
3618a75b519d strerror_r: fix on newer cygwin Eric Blake <eblake@redhat.com> parents: 14765 diff changeset	36 # define USE_XPG_STRERROR_R 1
3618a75b519d strerror_r: fix on newer cygwin Eric Blake <eblake@redhat.com> parents: 14765 diff changeset	37
14786 5a40a173eb17 strerror_r: avoid clobbering strerror on cygwin Eric Blake <eblake@redhat.com> parents: 14782 diff changeset	38 #elif HAVE_DECL_STRERROR_R && !(__GLIBC__ >= 2 \|\| defined __UCLIBC__ \|\| defined __CYGWIN__)
13847 99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	39
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	40 /* The system's strerror_r function is OK, except that its third argument
14270 9dc44fa092bd strerror_r-posix: port to cygwin Eric Blake <eblake@redhat.com> parents: 14207 diff changeset	41 is 'int', not 'size_t', or its return type is wrong. */
13847 99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	42
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	43 # include <limits.h>
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	44
14758 0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	45 # define USE_SYSTEM_STRERROR_R 1
13847 99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	46
14786 5a40a173eb17 strerror_r: avoid clobbering strerror on cygwin Eric Blake <eblake@redhat.com> parents: 14782 diff changeset	47 #else /* (__GLIBC__ >= 2 \|\| defined __UCLIBC__ \|\| defined __CYGWIN__ ? !HAVE___XPG_STRERROR_R : !HAVE_DECL_STRERROR_R) */
13847 99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	48
14786 5a40a173eb17 strerror_r: avoid clobbering strerror on cygwin Eric Blake <eblake@redhat.com> parents: 14782 diff changeset	49 /* Use the system's strerror(). Exclude glibc and cygwin because the
5a40a173eb17 strerror_r: avoid clobbering strerror on cygwin Eric Blake <eblake@redhat.com> parents: 14782 diff changeset	50 system strerror_r has the wrong return type, and cygwin 1.7.9
5a40a173eb17 strerror_r: avoid clobbering strerror on cygwin Eric Blake <eblake@redhat.com> parents: 14782 diff changeset	51 strerror_r clobbers strerror. */
14758 0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	52 # undef strerror
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	53
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	54 # define USE_SYSTEM_STRERROR 1
13847 99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	55
14786 5a40a173eb17 strerror_r: avoid clobbering strerror on cygwin Eric Blake <eblake@redhat.com> parents: 14782 diff changeset	56 # if defined __NetBSD__ \|\| defined __hpux \|\| ((defined _WIN32 \|\| defined __WIN32__) && !defined __CYGWIN__) \|\| defined __sgi \|\| (defined __sun && !defined _LP64) \|\| defined __CYGWIN__
14765 8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	57
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	58 /* No locking needed. */
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	59
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	60 /* Get catgets internationalization functions. */
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	61 # if HAVE_CATGETS
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	62 # include <nl_types.h>
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	63 # endif
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	64
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	65 /* Get sys_nerr, sys_errlist on HP-UX (otherwise only declared in C++ mode).
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	66 Get sys_nerr, sys_errlist on IRIX (otherwise only declared with _SGIAPI). */
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	67 # if defined __hpux \|\| defined __sgi
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	68 extern int sys_nerr;
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	69 extern char *sys_errlist[];
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	70 # endif
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	71
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	72 /* Get sys_nerr on Solaris. */
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	73 # if defined __sun && !defined _LP64
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	74 extern int sys_nerr;
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	75 # endif
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	76
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	77 # else
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	78
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	79 # include "glthread/lock.h"
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	80
13847 99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	81 /* This lock protects the buffer returned by strerror(). We assume that
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	82 no other uses of strerror() exist in the program. */
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	83 gl_lock_define_initialized(static, strerror_lock)
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	84
14765 8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	85 # endif
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	86
14758 0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	87 #endif
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	88
14815 820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	89 /* Copy as much of MSG into BUF as possible, without corrupting errno.
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	90 Return 0 if MSG fit in BUFLEN, otherwise return ERANGE. */
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	91 static int
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	92 safe_copy (char buf, size_t buflen, const char msg)
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	93 {
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	94 size_t len = strlen (msg);
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	95 int ret;
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	96
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	97 if (len < buflen)
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	98 {
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	99 /* Although POSIX allows memcpy() to corrupt errno, we don't
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	100 know of any implementation where this is a real problem. */
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	101 memcpy (buf, msg, len + 1);
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	102 ret = 0;
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	103 }
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	104 else
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	105 {
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	106 memcpy (buf, msg, buflen - 1);
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	107 buf[buflen - 1] = '\0';
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	108 ret = ERANGE;
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	109 }
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	110 return ret;
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	111 }
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	112
14758 0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	113
13847 99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	114 int
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	115 strerror_r (int errnum, char *buf, size_t buflen)
14758 0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	116 #undef strerror_r
13847 99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	117 {
14782 5a7b4517a078 strerror_r: simplify AIX code. Eric Blake <eblake@redhat.com> parents: 14770 diff changeset	118 /* Filter this out now, so that rest of this replacement knows that
5a7b4517a078 strerror_r: simplify AIX code. Eric Blake <eblake@redhat.com> parents: 14770 diff changeset	119 there is room for a non-empty message and trailing NUL. */
5a7b4517a078 strerror_r: simplify AIX code. Eric Blake <eblake@redhat.com> parents: 14770 diff changeset	120 if (buflen <= 1)
5a7b4517a078 strerror_r: simplify AIX code. Eric Blake <eblake@redhat.com> parents: 14770 diff changeset	121 {
5a7b4517a078 strerror_r: simplify AIX code. Eric Blake <eblake@redhat.com> parents: 14770 diff changeset	122 if (buflen)
14815 820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	123 *buf = '\0';
14782 5a7b4517a078 strerror_r: simplify AIX code. Eric Blake <eblake@redhat.com> parents: 14770 diff changeset	124 return ERANGE;
5a7b4517a078 strerror_r: simplify AIX code. Eric Blake <eblake@redhat.com> parents: 14770 diff changeset	125 }
14815 820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	126 *buf = '\0';
14782 5a7b4517a078 strerror_r: simplify AIX code. Eric Blake <eblake@redhat.com> parents: 14770 diff changeset	127
14853 bdc85db78f47 strerror: drop strerror_r dependency Eric Blake <eblake@redhat.com> parents: 14851 diff changeset	128 /* Check for gnulib overrides. */
14758 0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	129 {
14853 bdc85db78f47 strerror: drop strerror_r dependency Eric Blake <eblake@redhat.com> parents: 14851 diff changeset	130 char const *msg = strerror_override (errnum);
14758 0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	131
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	132 if (msg)
14815 820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	133 return safe_copy (buf, buflen, msg);
14758 0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	134 }
13847 99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	135
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	136 {
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	137 int ret;
14769 8e815ef27998 strerror_r: guarantee unchanged errno Eric Blake <eblake@redhat.com> parents: 14768 diff changeset	138 int saved_errno = errno;
13847 99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	139
14768 a12deda870d9 strerror_r: Reorder #if blocks. Bruno Haible <bruno@clisp.org> parents: 14766 diff changeset	140 #if USE_XPG_STRERROR_R
a12deda870d9 strerror_r: Reorder #if blocks. Bruno Haible <bruno@clisp.org> parents: 14766 diff changeset	141
a12deda870d9 strerror_r: Reorder #if blocks. Bruno Haible <bruno@clisp.org> parents: 14766 diff changeset	142 {
a12deda870d9 strerror_r: Reorder #if blocks. Bruno Haible <bruno@clisp.org> parents: 14766 diff changeset	143 extern int __xpg_strerror_r (int errnum, char *buf, size_t buflen);
a12deda870d9 strerror_r: Reorder #if blocks. Bruno Haible <bruno@clisp.org> parents: 14766 diff changeset	144
a12deda870d9 strerror_r: Reorder #if blocks. Bruno Haible <bruno@clisp.org> parents: 14766 diff changeset	145 ret = __xpg_strerror_r (errnum, buf, buflen);
a12deda870d9 strerror_r: Reorder #if blocks. Bruno Haible <bruno@clisp.org> parents: 14766 diff changeset	146 if (ret < 0)
a12deda870d9 strerror_r: Reorder #if blocks. Bruno Haible <bruno@clisp.org> parents: 14766 diff changeset	147 ret = errno;
14815 820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	148 if (!*buf)
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	149 {
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	150 /* glibc 2.13 would not touch buf on err, so we have to fall
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	151 back to GNU strerror_r which always returns a thread-safe
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	152 untruncated string to (partially) copy into our buf. */
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	153 safe_copy (buf, buflen, strerror_r (errnum, buf, buflen));
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	154 }
14768 a12deda870d9 strerror_r: Reorder #if blocks. Bruno Haible <bruno@clisp.org> parents: 14766 diff changeset	155 }
a12deda870d9 strerror_r: Reorder #if blocks. Bruno Haible <bruno@clisp.org> parents: 14766 diff changeset	156
a12deda870d9 strerror_r: Reorder #if blocks. Bruno Haible <bruno@clisp.org> parents: 14766 diff changeset	157 #elif USE_SYSTEM_STRERROR_R
14758 0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	158
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	159 if (buflen > INT_MAX)
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	160 buflen = INT_MAX;
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	161
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	162 # ifdef __hpux
14817 2835cfc7d63e strerror_r: fix AIX test failures Eric Blake <eblake@redhat.com> parents: 14816 diff changeset	163 /* On HP-UX 11.31, strerror_r always fails when buflen < 80; it
2835cfc7d63e strerror_r: fix AIX test failures Eric Blake <eblake@redhat.com> parents: 14816 diff changeset	164 also fails to change buf on EINVAL. */
14758 0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	165 {
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	166 char stackbuf[80];
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	167
14815 820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	168 if (buflen < sizeof stackbuf)
14758 0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	169 {
14815 820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	170 ret = strerror_r (errnum, stackbuf, sizeof stackbuf);
14758 0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	171 if (ret == 0)
14815 820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	172 ret = safe_copy (buf, buflen, stackbuf);
14758 0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	173 }
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	174 else
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	175 ret = strerror_r (errnum, buf, buflen);
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	176 }
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	177 # else
14816 b6363790caec strerror_r: fix Solaris test failures Eric Blake <eblake@redhat.com> parents: 14815 diff changeset	178 /* Solaris 10 does not populate buf on ERANGE. */
14758 0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	179 ret = strerror_r (errnum, buf, buflen);
14816 b6363790caec strerror_r: fix Solaris test failures Eric Blake <eblake@redhat.com> parents: 14815 diff changeset	180 if (ret == ERANGE && !*buf)
b6363790caec strerror_r: fix Solaris test failures Eric Blake <eblake@redhat.com> parents: 14815 diff changeset	181 {
b6363790caec strerror_r: fix Solaris test failures Eric Blake <eblake@redhat.com> parents: 14815 diff changeset	182 char stackbuf[STACKBUF_LEN];
b6363790caec strerror_r: fix Solaris test failures Eric Blake <eblake@redhat.com> parents: 14815 diff changeset	183
b6363790caec strerror_r: fix Solaris test failures Eric Blake <eblake@redhat.com> parents: 14815 diff changeset	184 if (strerror_r (errnum, stackbuf, sizeof stackbuf) == ERANGE)
14862 42eaca1a6673 strerror_r: Fix comments. Bruno Haible <bruno@clisp.org> parents: 14853 diff changeset	185 /* STACKBUF_LEN should have been large enough. */
14816 b6363790caec strerror_r: fix Solaris test failures Eric Blake <eblake@redhat.com> parents: 14815 diff changeset	186 abort ();
b6363790caec strerror_r: fix Solaris test failures Eric Blake <eblake@redhat.com> parents: 14815 diff changeset	187 safe_copy (buf, buflen, stackbuf);
b6363790caec strerror_r: fix Solaris test failures Eric Blake <eblake@redhat.com> parents: 14815 diff changeset	188 }
14758 0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	189 # endif
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	190
14817 2835cfc7d63e strerror_r: fix AIX test failures Eric Blake <eblake@redhat.com> parents: 14816 diff changeset	191 # ifdef _AIX
2835cfc7d63e strerror_r: fix AIX test failures Eric Blake <eblake@redhat.com> parents: 14816 diff changeset	192 /* AIX returns 0 rather than ERANGE when truncating strings; try
2835cfc7d63e strerror_r: fix AIX test failures Eric Blake <eblake@redhat.com> parents: 14816 diff changeset	193 again until we are sure we got the entire string. */
2835cfc7d63e strerror_r: fix AIX test failures Eric Blake <eblake@redhat.com> parents: 14816 diff changeset	194 if (!ret && strlen (buf) == buflen - 1)
2835cfc7d63e strerror_r: fix AIX test failures Eric Blake <eblake@redhat.com> parents: 14816 diff changeset	195 {
2835cfc7d63e strerror_r: fix AIX test failures Eric Blake <eblake@redhat.com> parents: 14816 diff changeset	196 char stackbuf[STACKBUF_LEN];
2835cfc7d63e strerror_r: fix AIX test failures Eric Blake <eblake@redhat.com> parents: 14816 diff changeset	197 size_t len;
2835cfc7d63e strerror_r: fix AIX test failures Eric Blake <eblake@redhat.com> parents: 14816 diff changeset	198 strerror_r (errnum, stackbuf, sizeof stackbuf);
2835cfc7d63e strerror_r: fix AIX test failures Eric Blake <eblake@redhat.com> parents: 14816 diff changeset	199 len = strlen (stackbuf);
14862 42eaca1a6673 strerror_r: Fix comments. Bruno Haible <bruno@clisp.org> parents: 14853 diff changeset	200 /* STACKBUF_LEN should have been large enough. */
14817 2835cfc7d63e strerror_r: fix AIX test failures Eric Blake <eblake@redhat.com> parents: 14816 diff changeset	201 if (len + 1 == sizeof stackbuf)
2835cfc7d63e strerror_r: fix AIX test failures Eric Blake <eblake@redhat.com> parents: 14816 diff changeset	202 abort ();
2835cfc7d63e strerror_r: fix AIX test failures Eric Blake <eblake@redhat.com> parents: 14816 diff changeset	203 if (buflen <= len)
2835cfc7d63e strerror_r: fix AIX test failures Eric Blake <eblake@redhat.com> parents: 14816 diff changeset	204 ret = ERANGE;
2835cfc7d63e strerror_r: fix AIX test failures Eric Blake <eblake@redhat.com> parents: 14816 diff changeset	205 }
2835cfc7d63e strerror_r: fix AIX test failures Eric Blake <eblake@redhat.com> parents: 14816 diff changeset	206 # endif
2835cfc7d63e strerror_r: fix AIX test failures Eric Blake <eblake@redhat.com> parents: 14816 diff changeset	207
14758 0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	208 /* Some old implementations may return (-1, EINVAL) instead of EINVAL. */
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	209 if (ret < 0)
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	210 ret = errno;
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	211
14762 3c012e3d3f43 strerror: enforce POSIX ruling on strerror(0) Eric Blake <eblake@redhat.com> parents: 14758 diff changeset	212 /* FreeBSD rejects 0; see http://austingroupbugs.net/view.php?id=382. */
3c012e3d3f43 strerror: enforce POSIX ruling on strerror(0) Eric Blake <eblake@redhat.com> parents: 14758 diff changeset	213 if (errnum == 0 && ret == EINVAL)
14815 820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	214 ret = safe_copy (buf, buflen, "Success");
14762 3c012e3d3f43 strerror: enforce POSIX ruling on strerror(0) Eric Blake <eblake@redhat.com> parents: 14758 diff changeset	215
14758 0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	216 #else /* USE_SYSTEM_STRERROR */
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	217
14765 8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	218 /* Try to do what strerror (errnum) does, but without clobbering the
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	219 buffer used by strerror(). */
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	220
14786 5a40a173eb17 strerror_r: avoid clobbering strerror on cygwin Eric Blake <eblake@redhat.com> parents: 14782 diff changeset	221 # if defined __NetBSD__ \|\| defined __hpux \|\| ((defined _WIN32 \|\| defined __WIN32__) && !defined __CYGWIN__) \|\| defined __CYGWIN__ /* NetBSD, HP-UX, native Win32, Cygwin */
14765 8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	222
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	223 /* NetBSD: sys_nerr, sys_errlist are declared through _NETBSD_SOURCE
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	224 and <errno.h> above.
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	225 HP-UX: sys_nerr, sys_errlist are declared explicitly above.
14786 5a40a173eb17 strerror_r: avoid clobbering strerror on cygwin Eric Blake <eblake@redhat.com> parents: 14782 diff changeset	226 native Win32: sys_nerr, sys_errlist are declared in <stdlib.h>.
14792 fedc69ad1054 strerror_r: Fix comments. Bruno Haible <bruno@clisp.org> parents: 14786 diff changeset	227 Cygwin: sys_nerr, sys_errlist are declared in <errno.h>. */
14765 8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	228 if (errnum >= 0 && errnum < sys_nerr)
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	229 {
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	230 # if HAVE_CATGETS && (defined __NetBSD__ \|\| defined __hpux)
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	231 # if defined __NetBSD__
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	232 nl_catd catd = catopen ("libc", NL_CAT_LOCALE);
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	233 const char *errmsg =
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	234 (catd != (nl_catd)-1
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	235 ? catgets (catd, 1, errnum, sys_errlist[errnum])
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	236 : sys_errlist[errnum]);
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	237 # endif
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	238 # if defined __hpux
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	239 nl_catd catd = catopen ("perror", NL_CAT_LOCALE);
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	240 const char *errmsg =
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	241 (catd != (nl_catd)-1
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	242 ? catgets (catd, 1, 1 + errnum, sys_errlist[errnum])
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	243 : sys_errlist[errnum]);
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	244 # endif
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	245 # else
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	246 const char *errmsg = sys_errlist[errnum];
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	247 # endif
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	248 if (errmsg == NULL \|\| *errmsg == '\0')
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	249 ret = EINVAL;
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	250 else
14815 820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	251 ret = safe_copy (buf, buflen, errmsg);
14765 8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	252 # if HAVE_CATGETS && (defined __NetBSD__ \|\| defined __hpux)
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	253 if (catd != (nl_catd)-1)
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	254 catclose (catd);
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	255 # endif
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	256 }
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	257 else
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	258 ret = EINVAL;
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	259
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	260 # elif defined __sgi \|\| (defined __sun && !defined _LP64) /* IRIX, Solaris <= 9 32-bit */
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	261
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	262 /* For a valid error number, the system's strerror() function returns
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	263 a pointer to a not copied string, not to a buffer. */
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	264 if (errnum >= 0 && errnum < sys_nerr)
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	265 {
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	266 char *errmsg = strerror (errnum);
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	267
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	268 if (errmsg == NULL \|\| *errmsg == '\0')
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	269 ret = EINVAL;
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	270 else
14815 820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	271 ret = safe_copy (buf, buflen, errmsg);
14765 8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	272 }
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	273 else
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	274 ret = EINVAL;
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	275
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	276 # else
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	277
14758 0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	278 gl_lock_lock (strerror_lock);
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	279
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	280 {
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	281 char *errmsg = strerror (errnum);
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	282
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	283 /* For invalid error numbers, strerror() on
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	284 - IRIX 6.5 returns NULL,
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	285 - HP-UX 11 returns an empty string. */
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	286 if (errmsg == NULL \|\| *errmsg == '\0')
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	287 ret = EINVAL;
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	288 else
14815 820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	289 ret = safe_copy (buf, buflen, errmsg);
14758 0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	290 }
13847 99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	291
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	292 gl_lock_unlock (strerror_lock);
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	293
14765 8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	294 # endif
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	295
14758 0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	296 #endif
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	297
14815 820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	298 if (ret == EINVAL && !*buf)
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	299 snprintf (buf, buflen, "Unknown error %d", errnum);
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	300
14769 8e815ef27998 strerror_r: guarantee unchanged errno Eric Blake <eblake@redhat.com> parents: 14768 diff changeset	301 errno = saved_errno;
13847 99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	302 return ret;
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	303 }
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	304 }

Mercurial > hg > octave-lojdl > gnulib-hg

annotate lib/strerror_r.c @ 14862:42eaca1a6673