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    1: /*
    2:  * Copyright (c) 1988 Regents of the University of California.
    3:  * All rights reserved.
    4:  *
    5:  * Redistribution and use in source and binary forms are permitted
    6:  * provided that the above copyright notice and this paragraph are
    7:  * duplicated in all such forms and that any documentation,
    8:  * advertising materials, and other materials related to such
    9:  * distribution and use acknowledge that the software was developed
   10:  * by the University of California, Berkeley.  The name of the
   11:  * University may not be used to endorse or promote products derived
   12:  * from this software without specific prior written permission.
   13:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
   14:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
   15:  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
   16:  */
   17: 
   18: #if defined(LIBC_SCCS) && !defined(lint)
   19: static char sccsid[] = "@(#)strerror.c  5.1 (Berkeley) 4/9/89";
   20: #endif /* LIBC_SCCS and not lint */
   21: 
   22: #include <sys/types.h>
   23: 
   24: #include <stdio.h>
   25: 
   26: char *
   27: strerror(errnum)
   28: 	int errnum;
   29: {
   30: 	extern int sys_nerr;
   31: 	extern char *sys_errlist[];
   32: 	static char ebuf[20];
   33: 
   34: 	if ((unsigned int)errnum < sys_nerr)
   35: 		return(sys_errlist[errnum]);
   36: 	(void)sprintf(ebuf, "Unknown error: %d", errnum);
   37: 	return(ebuf);
   38: }