octave-lojdl/gnulib-hg: lib/strerror

annotate lib/strerror_r.c @ 17476:6057744acd2c default tip master

autoupdate

author	Karl Berry <karl@freefriends.org>
date	Fri, 16 Aug 2013 06:32:22 -0700
parents	e542fd46ad6f
children

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
17249 e542fd46ad6f maint: update all copyright year number ranges Eric Blake <eblake@redhat.com> parents: 16725 diff changeset	3 Copyright (C) 2010-2013 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
16725 fb659d60019f strerror_r: avoid compiler warning Eric Blake <eblake@redhat.com> parents: 16214 diff changeset	37 extern int __xpg_strerror_r (int errnum, char *buf, size_t buflen);
14766 3618a75b519d strerror_r: fix on newer cygwin Eric Blake <eblake@redhat.com> parents: 14765 diff changeset	38
14786 5a40a173eb17 strerror_r: avoid clobbering strerror on cygwin Eric Blake <eblake@redhat.com> parents: 14782 diff changeset	39 #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	40
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	41 /* 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	42 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	43
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	44 # include <limits.h>
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	45
14758 0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	46 # define USE_SYSTEM_STRERROR_R 1
13847 99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	47
14786 5a40a173eb17 strerror_r: avoid clobbering strerror on cygwin Eric Blake <eblake@redhat.com> parents: 14782 diff changeset	48 #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	49
14786 5a40a173eb17 strerror_r: avoid clobbering strerror on cygwin Eric Blake <eblake@redhat.com> parents: 14782 diff changeset	50 /* 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	51 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	52 strerror_r clobbers strerror. */
14758 0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	53 # undef strerror
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	54
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	55 # define USE_SYSTEM_STRERROR 1
13847 99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	56
14786 5a40a173eb17 strerror_r: avoid clobbering strerror on cygwin Eric Blake <eblake@redhat.com> parents: 14782 diff changeset	57 # 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	58
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	59 /* No locking needed. */
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	60
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	61 /* Get catgets internationalization functions. */
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	62 # if HAVE_CATGETS
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	63 # include <nl_types.h>
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	64 # endif
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	65
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 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	67 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	68 # if defined __hpux \|\| defined __sgi
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	69 extern int sys_nerr;
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	70 extern char *sys_errlist[];
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	71 # endif
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	72
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	73 /* Get sys_nerr on Solaris. */
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	74 # if defined __sun && !defined _LP64
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	75 extern int sys_nerr;
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	76 # endif
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	77
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	78 # else
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	79
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	80 # include "glthread/lock.h"
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	81
13847 99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	82 /* 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	83 no other uses of strerror() exist in the program. */
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	84 gl_lock_define_initialized(static, strerror_lock)
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	85
14765 8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	86 # endif
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	87
14758 0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	88 #endif
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	89
15743 4611f15ea1e8 strerror_r-posix: Avoid a link error on MSVC. Bruno Haible <bruno@clisp.org> parents: 15309 diff changeset	90 /* On MSVC, there is no snprintf() function, just a _snprintf().
15783 4b59b93e3c12 strerror_r-posix: Fix for MSVC 9. Bruno Haible <bruno@clisp.org> parents: 15743 diff changeset	91 It is of lower quality, but sufficient for the simple use here.
4b59b93e3c12 strerror_r-posix: Fix for MSVC 9. Bruno Haible <bruno@clisp.org> parents: 15743 diff changeset	92 We only have to make sure to NUL terminate the result (_snprintf
4b59b93e3c12 strerror_r-posix: Fix for MSVC 9. Bruno Haible <bruno@clisp.org> parents: 15743 diff changeset	93 does not NUL terminate, like strncpy). */
15743 4611f15ea1e8 strerror_r-posix: Avoid a link error on MSVC. Bruno Haible <bruno@clisp.org> parents: 15309 diff changeset	94 #if !HAVE_SNPRINTF
15783 4b59b93e3c12 strerror_r-posix: Fix for MSVC 9. Bruno Haible <bruno@clisp.org> parents: 15743 diff changeset	95 static int
4b59b93e3c12 strerror_r-posix: Fix for MSVC 9. Bruno Haible <bruno@clisp.org> parents: 15743 diff changeset	96 local_snprintf (char buf, size_t buflen, const char format, ...)
4b59b93e3c12 strerror_r-posix: Fix for MSVC 9. Bruno Haible <bruno@clisp.org> parents: 15743 diff changeset	97 {
4b59b93e3c12 strerror_r-posix: Fix for MSVC 9. Bruno Haible <bruno@clisp.org> parents: 15743 diff changeset	98 va_list args;
4b59b93e3c12 strerror_r-posix: Fix for MSVC 9. Bruno Haible <bruno@clisp.org> parents: 15743 diff changeset	99 int result;
4b59b93e3c12 strerror_r-posix: Fix for MSVC 9. Bruno Haible <bruno@clisp.org> parents: 15743 diff changeset	100
4b59b93e3c12 strerror_r-posix: Fix for MSVC 9. Bruno Haible <bruno@clisp.org> parents: 15743 diff changeset	101 va_start (args, format);
4b59b93e3c12 strerror_r-posix: Fix for MSVC 9. Bruno Haible <bruno@clisp.org> parents: 15743 diff changeset	102 result = _vsnprintf (buf, buflen, format, args);
4b59b93e3c12 strerror_r-posix: Fix for MSVC 9. Bruno Haible <bruno@clisp.org> parents: 15743 diff changeset	103 va_end (args);
4b59b93e3c12 strerror_r-posix: Fix for MSVC 9. Bruno Haible <bruno@clisp.org> parents: 15743 diff changeset	104 if (buflen > 0 && (result < 0 \|\| result >= buflen))
4b59b93e3c12 strerror_r-posix: Fix for MSVC 9. Bruno Haible <bruno@clisp.org> parents: 15743 diff changeset	105 buf[buflen - 1] = '\0';
4b59b93e3c12 strerror_r-posix: Fix for MSVC 9. Bruno Haible <bruno@clisp.org> parents: 15743 diff changeset	106 return result;
4b59b93e3c12 strerror_r-posix: Fix for MSVC 9. Bruno Haible <bruno@clisp.org> parents: 15743 diff changeset	107 }
4b59b93e3c12 strerror_r-posix: Fix for MSVC 9. Bruno Haible <bruno@clisp.org> parents: 15743 diff changeset	108 # define snprintf local_snprintf
15743 4611f15ea1e8 strerror_r-posix: Avoid a link error on MSVC. Bruno Haible <bruno@clisp.org> parents: 15309 diff changeset	109 #endif
4611f15ea1e8 strerror_r-posix: Avoid a link error on MSVC. Bruno Haible <bruno@clisp.org> parents: 15309 diff changeset	110
14815 820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	111 /* 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	112 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	113 static int
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	114 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	115 {
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	116 size_t len = strlen (msg);
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	117 int ret;
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	118
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	119 if (len < buflen)
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	120 {
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	121 /* 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	122 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	123 memcpy (buf, msg, len + 1);
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	124 ret = 0;
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	125 }
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	126 else
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	127 {
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	128 memcpy (buf, msg, buflen - 1);
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	129 buf[buflen - 1] = '\0';
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	130 ret = ERANGE;
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	131 }
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	132 return ret;
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	133 }
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	134
14758 0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	135
13847 99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	136 int
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	137 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	138 #undef strerror_r
13847 99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	139 {
14782 5a7b4517a078 strerror_r: simplify AIX code. Eric Blake <eblake@redhat.com> parents: 14770 diff changeset	140 /* 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	141 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	142 if (buflen <= 1)
5a7b4517a078 strerror_r: simplify AIX code. Eric Blake <eblake@redhat.com> parents: 14770 diff changeset	143 {
5a7b4517a078 strerror_r: simplify AIX code. Eric Blake <eblake@redhat.com> parents: 14770 diff changeset	144 if (buflen)
14815 820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	145 *buf = '\0';
14782 5a7b4517a078 strerror_r: simplify AIX code. Eric Blake <eblake@redhat.com> parents: 14770 diff changeset	146 return ERANGE;
5a7b4517a078 strerror_r: simplify AIX code. Eric Blake <eblake@redhat.com> parents: 14770 diff changeset	147 }
14815 820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	148 *buf = '\0';
14782 5a7b4517a078 strerror_r: simplify AIX code. Eric Blake <eblake@redhat.com> parents: 14770 diff changeset	149
14853 bdc85db78f47 strerror: drop strerror_r dependency Eric Blake <eblake@redhat.com> parents: 14851 diff changeset	150 /* Check for gnulib overrides. */
14758 0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	151 {
14853 bdc85db78f47 strerror: drop strerror_r dependency Eric Blake <eblake@redhat.com> parents: 14851 diff changeset	152 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	153
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	154 if (msg)
14815 820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	155 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	156 }
13847 99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	157
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	158 {
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	159 int ret;
14769 8e815ef27998 strerror_r: guarantee unchanged errno Eric Blake <eblake@redhat.com> parents: 14768 diff changeset	160 int saved_errno = errno;
13847 99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	161
14768 a12deda870d9 strerror_r: Reorder #if blocks. Bruno Haible <bruno@clisp.org> parents: 14766 diff changeset	162 #if USE_XPG_STRERROR_R
a12deda870d9 strerror_r: Reorder #if blocks. Bruno Haible <bruno@clisp.org> parents: 14766 diff changeset	163
a12deda870d9 strerror_r: Reorder #if blocks. Bruno Haible <bruno@clisp.org> parents: 14766 diff changeset	164 {
a12deda870d9 strerror_r: Reorder #if blocks. Bruno Haible <bruno@clisp.org> parents: 14766 diff changeset	165 ret = __xpg_strerror_r (errnum, buf, buflen);
a12deda870d9 strerror_r: Reorder #if blocks. Bruno Haible <bruno@clisp.org> parents: 14766 diff changeset	166 if (ret < 0)
a12deda870d9 strerror_r: Reorder #if blocks. Bruno Haible <bruno@clisp.org> parents: 14766 diff changeset	167 ret = errno;
14815 820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	168 if (!*buf)
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	169 {
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	170 /* 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	171 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	172 untruncated string to (partially) copy into our buf. */
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	173 safe_copy (buf, buflen, strerror_r (errnum, buf, buflen));
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	174 }
14768 a12deda870d9 strerror_r: Reorder #if blocks. Bruno Haible <bruno@clisp.org> parents: 14766 diff changeset	175 }
a12deda870d9 strerror_r: Reorder #if blocks. Bruno Haible <bruno@clisp.org> parents: 14766 diff changeset	176
a12deda870d9 strerror_r: Reorder #if blocks. Bruno Haible <bruno@clisp.org> parents: 14766 diff changeset	177 #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	178
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	179 if (buflen > INT_MAX)
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	180 buflen = INT_MAX;
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	181
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	182 # ifdef __hpux
14817 2835cfc7d63e strerror_r: fix AIX test failures Eric Blake <eblake@redhat.com> parents: 14816 diff changeset	183 /* 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	184 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	185 {
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	186 char stackbuf[80];
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	187
14815 820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	188 if (buflen < sizeof stackbuf)
14758 0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	189 {
14815 820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	190 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	191 if (ret == 0)
14815 820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	192 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	193 }
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	194 else
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	195 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	196 }
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	197 # else
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	198 ret = strerror_r (errnum, buf, buflen);
14816 b6363790caec strerror_r: fix Solaris test failures Eric Blake <eblake@redhat.com> parents: 14815 diff changeset	199
15309 8254c6270130 strerror_r: fix OpenBSD behavior on out-of-range Eric Blake <eblake@redhat.com> parents: 15308 diff changeset	200 /* Some old implementations may return (-1, EINVAL) instead of EINVAL. */
8254c6270130 strerror_r: fix OpenBSD behavior on out-of-range Eric Blake <eblake@redhat.com> parents: 15308 diff changeset	201 if (ret < 0)
8254c6270130 strerror_r: fix OpenBSD behavior on out-of-range Eric Blake <eblake@redhat.com> parents: 15308 diff changeset	202 ret = errno;
14758 0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	203 # endif
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	204
14817 2835cfc7d63e strerror_r: fix AIX test failures Eric Blake <eblake@redhat.com> parents: 14816 diff changeset	205 # ifdef _AIX
2835cfc7d63e strerror_r: fix AIX test failures Eric Blake <eblake@redhat.com> parents: 14816 diff changeset	206 /* 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	207 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	208 if (!ret && strlen (buf) == buflen - 1)
2835cfc7d63e strerror_r: fix AIX test failures Eric Blake <eblake@redhat.com> parents: 14816 diff changeset	209 {
2835cfc7d63e strerror_r: fix AIX test failures Eric Blake <eblake@redhat.com> parents: 14816 diff changeset	210 char stackbuf[STACKBUF_LEN];
2835cfc7d63e strerror_r: fix AIX test failures Eric Blake <eblake@redhat.com> parents: 14816 diff changeset	211 size_t len;
2835cfc7d63e strerror_r: fix AIX test failures Eric Blake <eblake@redhat.com> parents: 14816 diff changeset	212 strerror_r (errnum, stackbuf, sizeof stackbuf);
2835cfc7d63e strerror_r: fix AIX test failures Eric Blake <eblake@redhat.com> parents: 14816 diff changeset	213 len = strlen (stackbuf);
14862 42eaca1a6673 strerror_r: Fix comments. Bruno Haible <bruno@clisp.org> parents: 14853 diff changeset	214 /* STACKBUF_LEN should have been large enough. */
14817 2835cfc7d63e strerror_r: fix AIX test failures Eric Blake <eblake@redhat.com> parents: 14816 diff changeset	215 if (len + 1 == sizeof stackbuf)
2835cfc7d63e strerror_r: fix AIX test failures Eric Blake <eblake@redhat.com> parents: 14816 diff changeset	216 abort ();
2835cfc7d63e strerror_r: fix AIX test failures Eric Blake <eblake@redhat.com> parents: 14816 diff changeset	217 if (buflen <= len)
2835cfc7d63e strerror_r: fix AIX test failures Eric Blake <eblake@redhat.com> parents: 14816 diff changeset	218 ret = ERANGE;
2835cfc7d63e strerror_r: fix AIX test failures Eric Blake <eblake@redhat.com> parents: 14816 diff changeset	219 }
15309 8254c6270130 strerror_r: fix OpenBSD behavior on out-of-range Eric Blake <eblake@redhat.com> parents: 15308 diff changeset	220 # else
8254c6270130 strerror_r: fix OpenBSD behavior on out-of-range Eric Blake <eblake@redhat.com> parents: 15308 diff changeset	221 /* Solaris 10 does not populate buf on ERANGE. OpenBSD 4.7
8254c6270130 strerror_r: fix OpenBSD behavior on out-of-range Eric Blake <eblake@redhat.com> parents: 15308 diff changeset	222 truncates early on ERANGE rather than return a partial integer.
8254c6270130 strerror_r: fix OpenBSD behavior on out-of-range Eric Blake <eblake@redhat.com> parents: 15308 diff changeset	223 We prefer the maximal string. We set buf[0] earlier, and we
8254c6270130 strerror_r: fix OpenBSD behavior on out-of-range Eric Blake <eblake@redhat.com> parents: 15308 diff changeset	224 know of no implementation that modifies buf to be an
8254c6270130 strerror_r: fix OpenBSD behavior on out-of-range Eric Blake <eblake@redhat.com> parents: 15308 diff changeset	225 unterminated string, so this strlen should be portable in
8254c6270130 strerror_r: fix OpenBSD behavior on out-of-range Eric Blake <eblake@redhat.com> parents: 15308 diff changeset	226 practice (rather than pulling in a safer strnlen). */
8254c6270130 strerror_r: fix OpenBSD behavior on out-of-range Eric Blake <eblake@redhat.com> parents: 15308 diff changeset	227 if (ret == ERANGE && strlen (buf) < buflen - 1)
8254c6270130 strerror_r: fix OpenBSD behavior on out-of-range Eric Blake <eblake@redhat.com> parents: 15308 diff changeset	228 {
8254c6270130 strerror_r: fix OpenBSD behavior on out-of-range Eric Blake <eblake@redhat.com> parents: 15308 diff changeset	229 char stackbuf[STACKBUF_LEN];
14817 2835cfc7d63e strerror_r: fix AIX test failures Eric Blake <eblake@redhat.com> parents: 14816 diff changeset	230
15309 8254c6270130 strerror_r: fix OpenBSD behavior on out-of-range Eric Blake <eblake@redhat.com> parents: 15308 diff changeset	231 /* STACKBUF_LEN should have been large enough. */
8254c6270130 strerror_r: fix OpenBSD behavior on out-of-range Eric Blake <eblake@redhat.com> parents: 15308 diff changeset	232 if (strerror_r (errnum, stackbuf, sizeof stackbuf) == ERANGE)
8254c6270130 strerror_r: fix OpenBSD behavior on out-of-range Eric Blake <eblake@redhat.com> parents: 15308 diff changeset	233 abort ();
8254c6270130 strerror_r: fix OpenBSD behavior on out-of-range Eric Blake <eblake@redhat.com> parents: 15308 diff changeset	234 safe_copy (buf, buflen, stackbuf);
8254c6270130 strerror_r: fix OpenBSD behavior on out-of-range Eric Blake <eblake@redhat.com> parents: 15308 diff changeset	235 }
8254c6270130 strerror_r: fix OpenBSD behavior on out-of-range Eric Blake <eblake@redhat.com> parents: 15308 diff changeset	236 # endif
14758 0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	237
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	238 #else /* USE_SYSTEM_STRERROR */
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	239
14765 8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	240 /* 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	241 buffer used by strerror(). */
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	242
16214 ec738d6aeef5 Talk about "native Windows API", not "Win32". Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	243 # if defined __NetBSD__ \|\| defined __hpux \|\| ((defined _WIN32 \|\| defined __WIN32__) && !defined __CYGWIN__) \|\| defined __CYGWIN__ /* NetBSD, HP-UX, native Windows, Cygwin */
14765 8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	244
16214 ec738d6aeef5 Talk about "native Windows API", not "Win32". Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	245 /* NetBSD: sys_nerr, sys_errlist are declared through _NETBSD_SOURCE
ec738d6aeef5 Talk about "native Windows API", not "Win32". Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	246 and <errno.h> above.
ec738d6aeef5 Talk about "native Windows API", not "Win32". Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	247 HP-UX: sys_nerr, sys_errlist are declared explicitly above.
ec738d6aeef5 Talk about "native Windows API", not "Win32". Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	248 native Windows: sys_nerr, sys_errlist are declared in <stdlib.h>.
ec738d6aeef5 Talk about "native Windows API", not "Win32". Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	249 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	250 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	251 {
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 defined __NetBSD__
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	254 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	255 const char *errmsg =
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	256 (catd != (nl_catd)-1
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	257 ? 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	258 : sys_errlist[errnum]);
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	259 # endif
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	260 # if defined __hpux
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	261 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	262 const char *errmsg =
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	263 (catd != (nl_catd)-1
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	264 ? 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	265 : sys_errlist[errnum]);
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	266 # endif
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	267 # else
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	268 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	269 # endif
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	270 if (errmsg == NULL \|\| *errmsg == '\0')
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	271 ret = EINVAL;
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	272 else
14815 820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	273 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	274 # 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	275 if (catd != (nl_catd)-1)
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	276 catclose (catd);
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	277 # endif
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	278 }
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	279 else
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	280 ret = EINVAL;
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	281
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	282 # 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	283
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	284 /* 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	285 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	286 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	287 {
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	288 char *errmsg = strerror (errnum);
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	289
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	290 if (errmsg == NULL \|\| *errmsg == '\0')
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	291 ret = EINVAL;
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	292 else
14815 820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	293 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	294 }
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	295 else
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	296 ret = EINVAL;
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	297
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	298 # else
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	299
14758 0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	300 gl_lock_lock (strerror_lock);
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	301
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	302 {
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	303 char *errmsg = strerror (errnum);
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	304
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	305 /* 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	306 - IRIX 6.5 returns NULL,
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	307 - 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	308 if (errmsg == NULL \|\| *errmsg == '\0')
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	309 ret = EINVAL;
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	310 else
14815 820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	311 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	312 }
13847 99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	313
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	314 gl_lock_unlock (strerror_lock);
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	315
14765 8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	316 # endif
8e23facf1d9e strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14764 diff changeset	317
14758 0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	318 #endif
0ed8de9d6bbe strerror_r: Avoid clobbering the strerror buffer when possible. Bruno Haible <bruno@clisp.org> parents: 14270 diff changeset	319
14815 820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	320 if (ret == EINVAL && !*buf)
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	321 snprintf (buf, buflen, "Unknown error %d", errnum);
820329b2a895 strerror_r: enforce POSIX recommendations Eric Blake <eblake@redhat.com> parents: 14792 diff changeset	322
14769 8e815ef27998 strerror_r: guarantee unchanged errno Eric Blake <eblake@redhat.com> parents: 14768 diff changeset	323 errno = saved_errno;
13847 99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	324 return ret;
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	325 }
99dd2b4fab8b New module 'strerror_r-posix'. Bruno Haible <bruno@clisp.org> parents: diff changeset	326 }

Mercurial > hg > octave-lojdl > gnulib-hg

annotate lib/strerror_r.c @ 17476:6057744acd2c default tip master