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special.c revision 1.5 
      1  1.5    mrg /*	$NetBSD: special.c,v 1.5 1997/10/19 14:06:10 mrg Exp $	*/
      2  1.2    tls 
      3  1.1    tls /*-
      4  1.1    tls  * Copyright (c) 1991, 1993, 1994
      5  1.1    tls  *	The Regents of the University of California.  All rights reserved.
      6  1.1    tls  *
      7  1.1    tls  * Redistribution and use in source and binary forms, with or without
      8  1.1    tls  * modification, are permitted provided that the following conditions
      9  1.1    tls  * are met:
     10  1.1    tls  * 1. Redistributions of source code must retain the above copyright
     11  1.1    tls  *    notice, this list of conditions and the following disclaimer.
     12  1.1    tls  * 2. Redistributions in binary form must reproduce the above copyright
     13  1.1    tls  *    notice, this list of conditions and the following disclaimer in the
     14  1.1    tls  *    documentation and/or other materials provided with the distribution.
     15  1.1    tls  * 3. All advertising materials mentioning features or use of this software
     16  1.1    tls  *    must display the following acknowledgement:
     17  1.1    tls  *	This product includes software developed by the University of
     18  1.1    tls  *	California, Berkeley and its contributors.
     19  1.1    tls  * 4. Neither the name of the University nor the names of its contributors
     20  1.1    tls  *    may be used to endorse or promote products derived from this software
     21  1.1    tls  *    without specific prior written permission.
     22  1.1    tls  *
     23  1.1    tls  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  1.1    tls  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  1.1    tls  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  1.1    tls  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  1.1    tls  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  1.1    tls  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  1.1    tls  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  1.1    tls  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  1.1    tls  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  1.1    tls  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  1.1    tls  * SUCH DAMAGE.
     34  1.1    tls  */
     35  1.1    tls 
     36  1.4  lukem #include <sys/cdefs.h>
     37  1.1    tls #ifndef lint
     38  1.2    tls #if 0
     39  1.1    tls static char sccsid[] = "@(#)special.c	8.3 (Berkeley) 4/2/94";
     40  1.2    tls #else
     41  1.5    mrg __RCSID("$NetBSD: special.c,v 1.5 1997/10/19 14:06:10 mrg Exp $");
     42  1.2    tls #endif
     43  1.1    tls #endif /* not lint */
     44  1.1    tls 
     45  1.1    tls #include <sys/types.h>
     46  1.1    tls 
     47  1.1    tls #include <err.h>
     48  1.1    tls #include <stdlib.h>
     49  1.1    tls #include <stdio.h>
     50  1.1    tls #include <string.h>
     51  1.1    tls 
     52  1.1    tls #include "extern.h"
     53  1.1    tls 
     54  1.1    tls void
     55  1.1    tls c_special(fd1, file1, skip1, fd2, file2, skip2)
     56  1.1    tls 	int fd1, fd2;
     57  1.1    tls 	char *file1, *file2;
     58  1.1    tls 	off_t skip1, skip2;
     59  1.1    tls {
     60  1.1    tls 	int ch1, ch2;
     61  1.1    tls 	off_t byte, line;
     62  1.1    tls 	FILE *fp1, *fp2;
     63  1.1    tls 	int dfound;
     64  1.1    tls 
     65  1.4  lukem 	dfound = 0;
     66  1.1    tls 	if ((fp1 = fdopen(fd1, "r")) == NULL)
     67  1.1    tls 		err(ERR_EXIT, "%s", file1);
     68  1.1    tls 	if ((fp2 = fdopen(fd2, "r")) == NULL)
     69  1.1    tls 		err(ERR_EXIT, "%s", file2);
     70  1.1    tls 
     71  1.1    tls 	while (skip1--)
     72  1.1    tls 		if (getc(fp1) == EOF)
     73  1.1    tls 			goto eof;
     74  1.1    tls 	while (skip2--)
     75  1.1    tls 		if (getc(fp2) == EOF)
     76  1.1    tls 			goto eof;
     77  1.1    tls 
     78  1.1    tls 	dfound = 0;
     79  1.1    tls 	for (byte = line = 1;; ++byte) {
     80  1.1    tls 		ch1 = getc(fp1);
     81  1.1    tls 		ch2 = getc(fp2);
     82  1.1    tls 		if (ch1 == EOF || ch2 == EOF)
     83  1.1    tls 			break;
     84  1.1    tls 		if (ch1 != ch2)
     85  1.1    tls 			if (lflag) {
     86  1.1    tls 				dfound = 1;
     87  1.5    mrg 				(void)printf("%6qd %3o %3o\n", (long long)byte,
     88  1.5    mrg 				    ch1, ch2);
     89  1.1    tls 			} else
     90  1.1    tls 				diffmsg(file1, file2, byte, line);
     91  1.1    tls 				/* NOTREACHED */
     92  1.1    tls 		if (ch1 == '\n')
     93  1.1    tls 			++line;
     94  1.1    tls 	}
     95  1.1    tls 
     96  1.1    tls eof:	if (ferror(fp1))
     97  1.1    tls 		err(ERR_EXIT, "%s", file1);
     98  1.1    tls 	if (ferror(fp2))
     99  1.1    tls 		err(ERR_EXIT, "%s", file2);
    100  1.1    tls 	if (feof(fp1)) {
    101  1.1    tls 		if (!feof(fp2))
    102  1.1    tls 			eofmsg(file1);
    103  1.1    tls 	} else
    104  1.1    tls 		if (feof(fp2))
    105  1.1    tls 			eofmsg(file2);
    106  1.1    tls 	if (dfound)
    107  1.1    tls 		exit(DIFF_EXIT);
    108  1.1    tls }
    109