special.c revision 87282
11590Srgrimes/*- 21590Srgrimes * Copyright (c) 1991, 1993, 1994 31590Srgrimes * The Regents of the University of California. All rights reserved. 41590Srgrimes * 51590Srgrimes * Redistribution and use in source and binary forms, with or without 61590Srgrimes * modification, are permitted provided that the following conditions 71590Srgrimes * are met: 81590Srgrimes * 1. Redistributions of source code must retain the above copyright 91590Srgrimes * notice, this list of conditions and the following disclaimer. 101590Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111590Srgrimes * notice, this list of conditions and the following disclaimer in the 121590Srgrimes * documentation and/or other materials provided with the distribution. 131590Srgrimes * 3. All advertising materials mentioning features or use of this software 141590Srgrimes * must display the following acknowledgement: 151590Srgrimes * This product includes software developed by the University of 161590Srgrimes * California, Berkeley and its contributors. 171590Srgrimes * 4. Neither the name of the University nor the names of its contributors 181590Srgrimes * may be used to endorse or promote products derived from this software 191590Srgrimes * without specific prior written permission. 201590Srgrimes * 211590Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 221590Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 231590Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 241590Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251590Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 261590Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 271590Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 281590Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 291590Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 301590Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 311590Srgrimes * SUCH DAMAGE. 321590Srgrimes */ 331590Srgrimes 3487241Smarkm#include <sys/cdefs.h> 3587241Smarkm 3687241Smarkm__FBSDID("$FreeBSD: head/usr.bin/cmp/special.c 87282 2001-12-03 20:56:16Z dwmalone $"); 3787241Smarkm 381590Srgrimes#ifndef lint 3941568Sarchiestatic const char sccsid[] = "@(#)special.c 8.3 (Berkeley) 4/2/94"; 4087241Smarkm#endif 411590Srgrimes 421590Srgrimes#include <sys/types.h> 431590Srgrimes 441590Srgrimes#include <err.h> 451590Srgrimes#include <stdlib.h> 461590Srgrimes#include <stdio.h> 471590Srgrimes#include <string.h> 481590Srgrimes 491590Srgrimes#include "extern.h" 501590Srgrimes 511590Srgrimesvoid 521590Srgrimesc_special(fd1, file1, skip1, fd2, file2, skip2) 531590Srgrimes int fd1, fd2; 5486099Sdwmalone const char *file1, *file2; 551590Srgrimes off_t skip1, skip2; 561590Srgrimes{ 571590Srgrimes int ch1, ch2; 581590Srgrimes off_t byte, line; 591590Srgrimes FILE *fp1, *fp2; 601590Srgrimes int dfound; 611590Srgrimes 621590Srgrimes if ((fp1 = fdopen(fd1, "r")) == NULL) 631590Srgrimes err(ERR_EXIT, "%s", file1); 641590Srgrimes if ((fp2 = fdopen(fd2, "r")) == NULL) 651590Srgrimes err(ERR_EXIT, "%s", file2); 661590Srgrimes 6721429Sjoerg dfound = 0; 681590Srgrimes while (skip1--) 691590Srgrimes if (getc(fp1) == EOF) 701590Srgrimes goto eof; 711590Srgrimes while (skip2--) 721590Srgrimes if (getc(fp2) == EOF) 731590Srgrimes goto eof; 741590Srgrimes 751590Srgrimes for (byte = line = 1;; ++byte) { 761590Srgrimes ch1 = getc(fp1); 771590Srgrimes ch2 = getc(fp2); 781590Srgrimes if (ch1 == EOF || ch2 == EOF) 791590Srgrimes break; 8046081Simp if (ch1 != ch2) { 811590Srgrimes if (lflag) { 821590Srgrimes dfound = 1; 8387282Sdwmalone (void)printf("%6lld %3o %3o\n", 8487282Sdwmalone (long long)byte, ch1, ch2); 8546081Simp } else { 861590Srgrimes diffmsg(file1, file2, byte, line); 871590Srgrimes /* NOTREACHED */ 8846081Simp } 8946081Simp } 901590Srgrimes if (ch1 == '\n') 911590Srgrimes ++line; 921590Srgrimes } 931590Srgrimes 941590Srgrimeseof: if (ferror(fp1)) 951590Srgrimes err(ERR_EXIT, "%s", file1); 961590Srgrimes if (ferror(fp2)) 971590Srgrimes err(ERR_EXIT, "%s", file2); 981590Srgrimes if (feof(fp1)) { 991590Srgrimes if (!feof(fp2)) 1001590Srgrimes eofmsg(file1); 1011590Srgrimes } else 1021590Srgrimes if (feof(fp2)) 1031590Srgrimes eofmsg(file2); 1041590Srgrimes if (dfound) 1051590Srgrimes exit(DIFF_EXIT); 1061590Srgrimes} 107