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- /* Copyright (C) 1991, 1992, 1993 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
-
- The GNU C Library 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
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If
- not, write to the Free Software Foundation, Inc., 675 Mass Ave,
- Cambridge, MA 02139, USA. */
-
- #include <ansidecl.h>
- #include <stdio.h>
- #include <string.h>
-
- #if !defined(HAVE_GNU_LD) && !defined (__ELF__)
- #define _sys_errlist sys_errlist
- #define _sys_nerr sys_nerr
- #endif
-
- #if NLS
- #include "nl_types.h"
- #endif
-
- /* Return a string descibing the errno code in ERRNUM.
- The storage is good only until the next call to strerror.
- Writing to the storage causes undefined behavior. */
- char *
- DEFUN(strerror, (errnum), int errnum)
- {
- #if NLS
- libc_nls_init();
- #endif
-
- if (errnum < 0 || errnum >= _sys_nerr)
- {
- static char unknown_error[] = "Unknown error 000000000000000000000";
- static char fmt[] = "Unknown error %d";
- #ifdef __linux__
- sprintf(unknown_error, fmt, errnum);
- #else
- size_t len = sprintf(unknown_error, fmt, errnum);
- if (len < sizeof(fmt) - 2)
- return NULL;
- unknown_error[len] = '\0';
- #endif
- return unknown_error;
- }
- #if NLS
- return catgets(_libc_cat, ErrorListSet, errnum +1, (char *) _sys_errlist[errnum]);
- #else
- return (char *) _sys_errlist[errnum];
- #endif
- }
-