lib/ansi/strerror.c

   1 /*
   2  * (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
   3  * See the copyright notice in the ACK home directory, in the file "Copyright".
   4  */
   5 /* $Header$ */
   6
   7 #include        <string.h>
   8
   9 /*
  10  * I don't know why, but X3J11 says that strerror() should be in declared
  11  * in <string.h>.  That is why the function is defined here.
  12  */
  13 char *
  14 strerror(register int errnum)
  15 {
  16         extern const char *_sys_errlist[];
  17         extern const int _sys_nerr;
  18
  19         if (errnum < 0 || errnum >= _sys_nerr)
  20                 return "unknown error";
  21         return (char *)_sys_errlist[errnum];
  22 }