PR/30845: Luke Mewburn: strerror_r(3) missing
- Merge 4.4BSD strerror.3 man page changes that summarize information for all the error printing functions. This makes the perror(3) page obsolete. - Implement all error functions in terms of strerror_r(), including __strerror() which is not used internally. Can it be removed? - Bump version for strerror_r
This commit is contained in:
parent
292dcda123
commit
1cf13731b1
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@ -1,4 +1,4 @@
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# $NetBSD: shlib_version,v 1.165 2005/07/06 14:43:24 drochner Exp $
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# $NetBSD: shlib_version,v 1.166 2005/07/28 16:26:29 christos Exp $
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# Remember to update distrib/sets/lists/base/shl.* when changing
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#
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# things we wish to do on next major version bump:
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@ -17,4 +17,4 @@
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# - libc/net/getnet{ent,namadr}.c, netdb.h: remove __n_pad0
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#
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major=12
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minor=130
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minor=131
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@ -1,5 +1,5 @@
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# from: @(#)Makefile.inc 5.7 (Berkeley) 6/27/91
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# $NetBSD: Makefile.inc,v 1.31 2005/06/12 05:49:12 lukem Exp $
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# $NetBSD: Makefile.inc,v 1.32 2005/07/28 16:26:29 christos Exp $
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# stdio sources
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.PATH: ${.CURDIR}/stdio
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@ -32,7 +32,7 @@ SRCS+= _fileno.c _fseeko.c _ftello.c
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MAN+= fclose.3 ferror.3 fflush.3 fgetln.3 fgets.3 fgetwln.3 fgetws.3 \
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flockfile.3 fopen.3 fparseln.3 fputs.3 fputws.3 fread.3 fseek.3 \
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funopen.3 fwide.3 getc.3 getwc.3 mktemp.3 perror.3 printf.3 \
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funopen.3 fwide.3 getc.3 getwc.3 mktemp.3 printf.3 \
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putc.3 putwc.3 remove.3 scanf.3 setbuf.3 stdio.3 tmpnam.3 \
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ungetc.3 ungetwc.3 wprintf.3 wscanf.3
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@ -1,81 +0,0 @@
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.\" $NetBSD: perror.3,v 1.10 2003/08/07 16:43:28 agc Exp $
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.\"
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.\" Copyright (c) 1980, 1991 Regents of the University of California.
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.\" All rights reserved.
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.\"
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.\" This code is derived from software contributed to Berkeley by
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.\" the American National Standards Committee X3, on Information
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.\" Processing Systems.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
|
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)strerror.3 6.9 (Berkeley) 6/29/91
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.\"
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.Dd June 29, 1991
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.Dt PERROR 3
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.Os
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.Sh NAME
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.Nm perror
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.Nd write error messages to standard error
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In stdio.h
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.Ft void
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.Fn perror "const char *string"
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.Sh DESCRIPTION
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The
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.Fn perror
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function looks up the language-dependent error message string affiliated
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with an error number and writes it, followed by a new-line, to the
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standard error stream.
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.Pp
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If the argument
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.Fa string
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is
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.Pf non- Dv NULL
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it is prepended to the message string and separated from it by
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a colon and a space
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.Pq Ql \&:\ \& .
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If
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.Fa string
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is
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.Dv NULL
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only the error message string is printed.
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.Pp
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The contents of the error message string is the same as those returned by
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.Fn strerror
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with argument
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.Fa errno .
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.Sh SEE ALSO
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.Xr intro 2 ,
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.Xr psignal 3 ,
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.Xr setlocale 3 ,
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.Xr strerror 3
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.Sh STANDARDS
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The
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.Fn perror
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function conforms to
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.St -ansiC .
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@ -1,4 +1,4 @@
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/* $NetBSD: perror.c,v 1.22 2003/08/07 16:43:28 agc Exp $ */
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/* $NetBSD: perror.c,v 1.23 2005/07/28 16:26:29 christos Exp $ */
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/*
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* Copyright (c) 1988, 1993
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@ -34,24 +34,23 @@
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#if 0
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static char sccsid[] = "@(#)perror.c 8.1 (Berkeley) 6/4/93";
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#else
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__RCSID("$NetBSD: perror.c,v 1.22 2003/08/07 16:43:28 agc Exp $");
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__RCSID("$NetBSD: perror.c,v 1.23 2005/07/28 16:26:29 christos Exp $");
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#endif
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#endif /* LIBC_SCCS and not lint */
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#include <errno.h>
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#include <limits.h>
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#include <stdio.h>
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#include <string.h>
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#include "extern.h"
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/*
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* Since perror() is not allowed to change the contents of strerror()'s
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* static buffer, both functions supply their own buffers to the
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* internal function __strerror().
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* static buffer, both functions supply their own buffers to strerror_r().
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*/
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void
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perror(s)
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const char *s;
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perror(const char *s)
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{
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const char *separator;
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char buf[NL_TEXTMAX];
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@ -63,6 +62,6 @@ perror(s)
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else
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separator = ": ";
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(void)fprintf(stderr, "%s%s%s\n", s, separator,
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__strerror(errno, buf, sizeof(buf)));
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(void)strerror_r(errno, buf, sizeof(buf));
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(void)fprintf(stderr, "%s%s%s\n", s, separator, buf);
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}
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@ -1,12 +1,12 @@
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# from: @(#)Makefile.inc 8.1 (Berkeley) 6/4/93
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# $NetBSD: Makefile.inc,v 1.56 2005/03/14 03:13:53 perry Exp $
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# $NetBSD: Makefile.inc,v 1.57 2005/07/28 16:26:29 christos Exp $
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# string sources
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.PATH: ${ARCHDIR}/string ${.CURDIR}/string
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SRCS+= bm.c strcasecmp.c strcasestr.c strcoll.c strdup.c strerror.c \
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strlcat.c strlcpy.c strmode.c strsignal.c strtok.c strtok_r.c \
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strxfrm.c __strerror.c __strsignal.c
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strxfrm.c __strerror.c __strsignal.c strerror_r.c
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# wide char
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SRCS+= wcscat.c wcschr.c wcscmp.c wcscpy.c wcscspn.c wcslcat.c wcslcpy.c \
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@ -67,6 +67,8 @@ MLINKS+=strcpy.3 strncpy.3
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MLINKS+=strlcpy.3 strlcat.3
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MLINKS+=strstr.3 strcasestr.3
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MLINKS+=strtok.3 strtok_r.3
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MLINKS+=strerror.3 strerror_r.3 strerror.3 perror.3 \
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strerror.3 sys_errlist.3 strerror.3 sys_nerr.3
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MLINKS+=wmemchr.3 wmemcmp.3 wmemchr.3 wmemcpy.3 \
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wmemchr.3 wmemmove.3 wmemchr.3 wmemset.3 \
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wmemchr.3 wcscat.3 wmemchr.3 wcschr.3 \
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@ -1,4 +1,4 @@
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/* $NetBSD: __strerror.c,v 1.21 2003/08/07 16:43:46 agc Exp $ */
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/* $NetBSD: __strerror.c,v 1.22 2005/07/28 16:26:29 christos Exp $ */
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/*
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* Copyright (c) 1988 Regents of the University of California.
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@ -34,7 +34,7 @@
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#if 0
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static char *sccsid = "@(#)strerror.c 5.6 (Berkeley) 5/4/91";
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#else
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__RCSID("$NetBSD: __strerror.c,v 1.21 2003/08/07 16:43:46 agc Exp $");
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__RCSID("$NetBSD: __strerror.c,v 1.22 2005/07/28 16:26:29 christos Exp $");
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#endif
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#endif /* LIBC_SCCS and not lint */
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@ -51,48 +51,12 @@ __RCSID("$NetBSD: __strerror.c,v 1.21 2003/08/07 16:43:46 agc Exp $");
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#include "extern.h"
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/*
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* Since perror() is not allowed to change the contents of strerror()'s
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* static buffer, both functions supply their own buffers to the
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* internal function __strerror().
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* Compatibility. Can it be removed?
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*/
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const char *
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__strerror(num, buf, buflen)
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int num;
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char *buf;
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size_t buflen;
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__strerror(int num, char *buf, size_t buflen)
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{
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#define UPREFIX "Unknown error: %u"
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unsigned int errnum;
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#ifdef NLS
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int saved_errno = errno;
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nl_catd catd ;
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catd = catopen("libc", NL_CAT_LOCALE);
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#endif
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_DIAGASSERT(buf != NULL);
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errnum = num; /* convert to unsigned */
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if (errnum < (unsigned int) sys_nerr) {
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#ifdef NLS
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(void)strlcpy(buf, catgets(catd, 1, (int)errnum,
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sys_errlist[errnum]), buflen);
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#else
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return(sys_errlist[errnum]);
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#endif
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} else {
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#ifdef NLS
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snprintf(buf, buflen,
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catgets(catd, 1, 0xffff, UPREFIX), errnum);
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#else
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snprintf(buf, buflen, UPREFIX, errnum);
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#endif
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}
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#ifdef NLS
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catclose(catd);
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errno = saved_errno;
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#endif
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(void)strerror_r(num, buf, buflen);
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return buf;
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}
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|
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@ -1,5 +1,5 @@
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.\" Copyright (c) 1980, 1991 Regents of the University of California.
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.\" All rights reserved.
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.\" Copyright (c) 1980, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" This code is derived from software contributed to Berkeley by
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.\" the American National Standards Committee X3, on Information
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@ -13,7 +13,7 @@
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.\" 2. Redistributions in binary form must reproduce the above copyright
|
||||
.\" notice, this list of conditions and the following disclaimer in the
|
||||
.\" documentation and/or other materials provided with the distribution.
|
||||
.\" 3. Neither the name of the University nor the names of its contributors
|
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.\" 4. Neither the name of the University nor the names of its contributors
|
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.\" may be used to endorse or promote products derived from this software
|
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.\" without specific prior written permission.
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.\"
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@ -29,36 +29,155 @@
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" from: @(#)strerror.3 6.9 (Berkeley) 6/29/91
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.\" $NetBSD: strerror.3,v 1.10 2003/08/07 16:43:50 agc Exp $
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.\"
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.Dd June 29, 1991
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.\" @(#)strerror.3 8.1 (Berkeley) 6/9/93
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.Dd July 28, 2005
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.Dt STRERROR 3
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.Os
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.Sh NAME
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.Nm strerror
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.Nd get error message string
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.Nm perror ,
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.Nm strerror ,
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.Nm strerror_r ,
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.Nm sys_errlist ,
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.Nm sys_nerr
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.Nd system error messages
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In stdio.h
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.Ft void
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.Fn perror "const char *string"
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.In errno.h
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.Vt extern const char * const sys_errlist[] ;
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.Vt extern const int sys_nerr ;
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.In string.h
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.Ft char *
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.Ft "char *"
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.Fn strerror "int errnum"
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.Ft int
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.Fn strerror_r "int errnum" "char *strerrbuf" "size_t buflen"
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.Sh DESCRIPTION
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The
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.Fn strerror
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function returns a pointer to the language-dependent error message
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string affiliated with an error number.
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.Fn strerror ,
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.Fn strerror_r
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and
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.Fn perror
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functions look up the language-dependent error message
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string corresponding with an error number.
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.Pp
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The array pointed to is not to be modified by the program, but may be
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overwritten by subsequent calls to
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.Fn strerror .
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.Sh SEE ALSO
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.Xr intro 2 ,
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.Xr perror 3 ,
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.Xr setlocale 3
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.Sh STANDARDS
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The
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.Fn strerror
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function accepts an error number argument
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.Fa errnum
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and returns a pointer to the corresponding
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message string.
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.Pp
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The
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.Fn strerror_r
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function renders the same result into
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.Fa strerrbuf
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for a maximum of
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.Fa buflen
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characters and returns 0 upon success.
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.Pp
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The
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.Fn perror
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function finds the error message corresponding to the current
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value of the global variable
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.Va errno
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.Pq Xr intro 2
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and writes it, followed by a newline, to the
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standard error file descriptor.
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If the argument
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.Fa string
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is
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.Pf non- Dv NULL
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and does not point to the null character,
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this string is prepended to the message
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string and separated from it by
|
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a colon and space
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.Pq Dq Li ":\ " ;
|
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otherwise, only the error message string is printed.
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.Pp
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If the error number is not recognized, these functions return an error message
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string containing
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.Dq Li "Unknown error:\ "
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followed by the error number in decimal.
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The
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.Fn strerror
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and
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.Fn strerror_r
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functions return
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.Er EINVAL
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as a warning.
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Error numbers recognized by this implementation fall in
|
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the range 0 <
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.Fa errnum
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<
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.Fa sys_nerr .
|
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.Pp
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If insufficient storage is provided in
|
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.Fa strerrbuf
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(as specified in
|
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.Fa buflen )
|
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to contain the error string,
|
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.Fn strerror_r
|
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returns
|
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.Er ERANGE
|
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and
|
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.Fa strerrbuf
|
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will contain an error message that has been truncated and
|
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.Dv NUL
|
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terminated to fit the length specified by
|
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.Fa buflen .
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.Pp
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The message strings can be accessed directly using the external
|
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array
|
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.Va sys_errlist .
|
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The external value
|
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.Va sys_nerr
|
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contains a count of the messages in
|
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.Va sys_errlist .
|
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The use of these variables is deprecated;
|
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.Fn strerror
|
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or
|
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.Fn strerror_r
|
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should be used instead.
|
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.Sh SEE ALSO
|
||||
.Xr intro 2 ,
|
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.Xr psignal 3
|
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.Sh STANDARDS
|
||||
The
|
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.Fn perror
|
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and
|
||||
.Fn strerror
|
||||
functions conform to
|
||||
.St -isoC-99 .
|
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The
|
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.Fn strerror_r
|
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function conforms to
|
||||
.St -ansiC .
|
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.St -p1003.1-2001 .
|
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.Sh HISTORY
|
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The
|
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.Fn strerror
|
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and
|
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.Fn perror
|
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functions first appeared in
|
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.Bx 4.4 .
|
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The
|
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.Fn strerror_r
|
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function first appeared in
|
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.Nx 4.0
|
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.Sh BUGS
|
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For unknown error numbers, the
|
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.Fn strerror
|
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function will return its result in a static buffer which
|
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may be overwritten by subsequent calls.
|
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.Pp
|
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The return type for
|
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.Fn strerror
|
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is missing a type-qualifier; it should actually be
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.Vt const char * .
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.Pp
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Programs that use the deprecated
|
||||
.Va sys_errlist
|
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variable often fail to compile because they declare it
|
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inconsistently.
|
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|
|
|
@ -1,4 +1,4 @@
|
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/* $NetBSD: strerror.c,v 1.12 2003/08/07 16:43:51 agc Exp $ */
|
||||
/* $NetBSD: strerror.c,v 1.13 2005/07/28 16:26:29 christos Exp $ */
|
||||
|
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/*
|
||||
* Copyright (c) 1988 Regents of the University of California.
|
||||
|
@ -34,26 +34,26 @@
|
|||
#if 0
|
||||
static char *sccsid = "@(#)strerror.c 5.6 (Berkeley) 5/4/91";
|
||||
#else
|
||||
__RCSID("$NetBSD: strerror.c,v 1.12 2003/08/07 16:43:51 agc Exp $");
|
||||
__RCSID("$NetBSD: strerror.c,v 1.13 2005/07/28 16:26:29 christos Exp $");
|
||||
#endif
|
||||
#endif /* LIBC_SCCS and not lint */
|
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|
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#include <string.h>
|
||||
#include <limits.h>
|
||||
#include <errno.h>
|
||||
#include "extern.h"
|
||||
|
||||
/*
|
||||
* Since perror() is not allowed to change the contents of strerror()'s
|
||||
* static buffer, both functions supply their own buffers to the
|
||||
* internal function __strerror().
|
||||
* static buffer, both functions supply their own buffers to strerror_r()
|
||||
*/
|
||||
|
||||
__aconst char *
|
||||
strerror(num)
|
||||
int num;
|
||||
strerror(int num)
|
||||
{
|
||||
static char buf[NL_TEXTMAX];
|
||||
|
||||
/* LINTED const castaway */
|
||||
return (__aconst char *)__strerror(num, buf, sizeof(buf));
|
||||
int error = strerror_r(num, buf, sizeof(buf));
|
||||
if (error)
|
||||
errno = error;
|
||||
return buf;
|
||||
}
|
||||
|
|
|
@ -0,0 +1,93 @@
|
|||
/* $NetBSD: strerror_r.c,v 1.1 2005/07/28 16:26:29 christos Exp $ */
|
||||
|
||||
/*
|
||||
* Copyright (c) 1988 Regents of the University of California.
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. Neither the name of the University nor the names of its contributors
|
||||
* may be used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#include <sys/cdefs.h>
|
||||
#if defined(LIBC_SCCS) && !defined(lint)
|
||||
#if 0
|
||||
static char *sccsid = "@(#)strerror.c 5.6 (Berkeley) 5/4/91";
|
||||
#else
|
||||
__RCSID("$NetBSD: strerror_r.c,v 1.1 2005/07/28 16:26:29 christos Exp $");
|
||||
#endif
|
||||
#endif /* LIBC_SCCS and not lint */
|
||||
|
||||
#include "namespace.h"
|
||||
#ifdef NLS
|
||||
#include <limits.h>
|
||||
#include <nl_types.h>
|
||||
#endif
|
||||
|
||||
#include <assert.h>
|
||||
#include <errno.h>
|
||||
#include <stdio.h>
|
||||
#include <string.h>
|
||||
#include "extern.h"
|
||||
|
||||
int
|
||||
strerror_r(int num, char *buf, size_t buflen)
|
||||
{
|
||||
#define UPREFIX "Unknown error: %u"
|
||||
unsigned int errnum = num;
|
||||
int retval = 0;
|
||||
size_t slen;
|
||||
#ifdef NLS
|
||||
int saved_errno = errno;
|
||||
nl_catd catd;
|
||||
catd = catopen("libc", NL_CAT_LOCALE);
|
||||
#endif
|
||||
_DIAGASSERT(buf != NULL);
|
||||
|
||||
if (errnum < (unsigned int) sys_nerr) {
|
||||
#ifdef NLS
|
||||
slen = strlcpy(buf, catgets(catd, 1, (int)errnum,
|
||||
sys_errlist[errnum]), buflen);
|
||||
#else
|
||||
slen = strlcpy(buf, sys_errlist[errnum], buflen);
|
||||
#endif
|
||||
} else {
|
||||
#ifdef NLS
|
||||
slen = snprintf(buf, buflen,
|
||||
catgets(catd, 1, 0xffff, UPREFIX), errnum);
|
||||
#else
|
||||
slen = snprintf(buf, buflen, UPREFIX, errnum);
|
||||
#endif
|
||||
retval = EINVAL;
|
||||
}
|
||||
|
||||
if (slen >= buflen)
|
||||
retval = ERANGE;
|
||||
|
||||
#ifdef NLS
|
||||
catclose(catd);
|
||||
errno = saved_errno;
|
||||
#endif
|
||||
|
||||
return retval;
|
||||
}
|
Loading…
Reference in New Issue