string/strerror.c

   1 /* Copyright (C) 1991, 1993, 1994, 1995 Free Software Foundation, Inc.
   2 This file is part of the GNU C Library.
   3
   4 The GNU C Library is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU Library General Public License as
   6 published by the Free Software Foundation; either version 2 of the
   7 License, or (at your option) any later version.
   8
   9 The GNU C Library is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12 Library General Public License for more details.
  13
  14 You should have received a copy of the GNU Library General Public
  15 License along with the GNU C Library; see the file COPYING.LIB.  If
  16 not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17 Boston, MA 02111-1307, USA.  */
  18
  19 #include <stdio.h>
  20 #include <string.h>
  21
  22 extern char *_strerror_internal __P ((int, char *, size_t));
  23
  24 /* Return a string descibing the errno code in ERRNUM.
  25    The storage is good only until the next call to strerror.
  26    Writing to the storage causes undefined behavior.  */
  27 char *
  28 strerror (errnum)
  29      int errnum;
  30 {
  31   static char buf[1024];
  32   return _strerror_internal (errnum, buf, sizeof buf);
  33 }