1  /* strerror.c --- ANSI C compatible system error routine
       2  
       3     Copyright (C) 1986, 1988, 1989, 1991, 2023 the Free Software Foundation, Inc.
       4  
       5     This program is free software; you can redistribute it and/or modify
       6     it under the terms of the GNU General Public License as published by
       7     the Free Software Foundation; either version 3, or (at your option)
       8     any later version.
       9  
      10     This program is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      13     GNU General Public License for more details.
      14  
      15     You should have received a copy of the GNU General Public License
      16     along with this program; if not, write to the Free Software Foundation,
      17     Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
      18  
      19  #if 0
      20  #include <stdio.h>
      21  #endif
      22  
      23  extern int sys_nerr;
      24  extern char *sys_errlist[];
      25  
      26  char *
      27  strerror(int n)
      28  {
      29  	static char mesg[30];
      30  
      31  	if (n < 0 || n >= sys_nerr) {
      32  		sprintf(mesg, "Unknown error (%d)", n);
      33  		return mesg;
      34  	} else
      35  		return sys_errlist[n];
      36  }