"Fossies" - the Fresh Open Source Software Archive

Member "arpwatch-NG1.7/strerror.c" (11 Mar 2005, 2514 Bytes) of archive /linux/misc/old/arpwatch-NG1.7.tar.gz:


As a special service "Fossies" has tried to format the requested source page into HTML format using (guessed) C and C++ source code syntax highlighting (style: standard) with prefixed line numbers and code folding option. Alternatively you can here view or download the uninterpreted source code file. See also the latest Fossies "Diffs" side-by-side code changes report for "strerror.c": 2.1a15_vs_1.7.

    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 #include <sys/types.h>
   35 
   36 #include <string.h>
   37 
   38 #include "gnuc.h"
   39 #ifdef HAVE_OS_PROTO_H
   40 #include "os-proto.h"
   41 #endif
   42 
   43 char * strerror(int num)
   44 {
   45     extern int sys_nerr;
   46     extern char *sys_errlist[];
   47 #define UPREFIX "Unknown error: "
   48     static char ebuf[40] = UPREFIX; /* 64-bit number + slop */
   49     unsigned int errnum;
   50     char *p, *t;
   51     char tmp[40];
   52 
   53     errnum = num;       /* convert to unsigned */
   54     if(errnum < sys_nerr)
   55         return (sys_errlist[errnum]);
   56 
   57     /* Do this by hand, so we don't include stdio(3). */
   58     t = tmp;
   59     do {
   60         *t++ = "0123456789"[errnum % 10];
   61     } while(errnum /= 10);
   62     for(p = ebuf + sizeof(UPREFIX) - 1;;) {
   63         *p++ = *--t;
   64         if(t <= tmp)
   65             break;
   66     }
   67     *p = '\0';
   68     return (ebuf);
   69 }