Mercurial > gnulib
view lib/strerror.c @ 9224:404ee875898f
Fix strerror on Interix.
* lib/string_.h (strerror): Declare replacement.
* doc/functions/strerror.texi (strerror): Document the Interix
shortcoming.
* modules/string (Makefile.am): Support new hooks.
* m4/string_h.m4 (gl_HEADER_STRING_H_DEFAULTS): Add new hooks.
* m4/strerror.m4 (gl_FUNC_STRERROR): Defer to
gl_FUNC_STRERROR_SEPARATE.
(gl_FUNC_STRERROR_SEPARATE): Check for Interix bug.
* lib/strerror.c (rpl_strerror): Provide replacement.
* modules/strerror (Depends-on): Add string.
(configure.ac): Detect use of module.
* tests/test-strerror.c: New file.
* modules/strerror-tests: New test module.
* modules/argp (Depends-on): Add strerror.
* modules/error (Depends-on): Likewise.
Reported by Martin Koeppe.
Signed-off-by: Eric Blake <ebb9@byu.net>
author | Eric Blake <ebb9@byu.net> |
---|---|
date | Tue, 25 Sep 2007 10:40:16 -0600 |
parents | 3e28c7035f38 |
children | bbbbbf4cd1c5 |
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/* strerror.c --- ANSI C compatible system error routine Copyright (C) 1986, 1988, 1989, 1991, 2002, 2003, 2006, 2007 Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #include <config.h> #if REPLACE_STRERROR # include <string.h> # include <stdio.h> # undef strerror char *rpl_strerror (int n) { static char const fmt[] = "Unknown error (%d)"; static char mesg[sizeof fmt + sizeof n * CHAR_BIT / 3]; char *result = strerror (n); if (! result) { sprintf (mesg, fmt, n); return mesg; } return result; } #elif !HAVE_STRERROR #include <limits.h> /* Don't include <stdio.h>, since it may or may not declare sys_errlist and its declarations may collide with ours. Just declare the stuff that we need directly. Standard hosted C89 implementations define strerror and they don't need this strerror function, so take some liberties with the standard to cater to ancient or limited freestanding implementations. */ int sprintf (char *, char const *, ...); extern int sys_nerr; extern char *sys_errlist[]; char * strerror (int n) { static char const fmt[] = "Unknown error (%d)"; static char mesg[sizeof fmt + sizeof n * CHAR_BIT / 3]; if (n < 0 || n >= sys_nerr) { sprintf (mesg, fmt, n); return mesg; } else return sys_errlist[n]; } #else /* This declaration is solely to ensure that after preprocessing this file is never empty. */ typedef int dummy; #endif