2.11BSD#431 - /usr/src/lib/libc/string/strerror.c

   1: /*
   2:  * Copyright (c) 1988, 1993
   3:  *	The Regents of the University of California.  All rights reserved.
   4:  *
   5:  * Redistribution and use in source and binary forms, with or without
   6:  * modification, are permitted provided that the following conditions
   7:  * are met:
   8:  * 1. Redistributions of source code must retain the above copyright
   9:  *    notice, this list of conditions and the following disclaimer.
  10:  * 2. Redistributions in binary form must reproduce the above copyright
  11:  *    notice, this list of conditions and the following disclaimer in the
  12:  *    documentation and/or other materials provided with the distribution.
  13:  * 3. All advertising materials mentioning features or use of this software
  14:  *    must display the following acknowledgement:
  15:  *	This product includes software developed by the University of
  16:  *	California, Berkeley and its contributors.
  17:  * 4. Neither the name of the University nor the names of its contributors
  18:  *    may be used to endorse or promote products derived from this software
  19:  *    without specific prior written permission.
  20:  *
  21:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31:  * SUCH DAMAGE.
  32:  */
  33: 
  34: #if defined(LIBC_SCCS) && !defined(lint)
  35: static char sccsid[] = "@(#)strerror.c	8.1.1 (2.11BSD) 1996/3/15";
  36: #endif /* LIBC_SCCS and not lint */
  37: 
  38: #include <string.h>
  39: 
  40: char *
  41: strerror(num)
  42:     int num;
  43: {
  44: #define UPREFIX "Unknown error: "
  45:     static char ebuf[30] = UPREFIX;     /* 32-bit number + slop */
  46:     register unsigned int errnum;
  47:     register char *p, *t;
  48:     char tmp[20];
  49: 
  50:     errnum = num;               /* convert to unsigned */
  51:     if (p = syserrlst(errnum))
  52:         return(p);
  53: 
  54:     /* Do this by hand, so we don't include stdio(3). */
  55:     t = tmp;
  56:     do {
  57:         *t++ = '0' + (errnum % 10);
  58:     } while (errnum /= 10);
  59:     for (p = ebuf + sizeof(UPREFIX) - 1;;) {
  60:         *p++ = *--t;
  61:         if (t <= tmp)
  62:             break;
  63:     }
  64:     return(ebuf);
  65: }

Defined functions

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Defined macros