special.c revision 21429
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 341590Srgrimes#ifndef lint 351590Srgrimesstatic char sccsid[] = "@(#)special.c 8.3 (Berkeley) 4/2/94"; 361590Srgrimes#endif /* not lint */ 371590Srgrimes 381590Srgrimes#include <sys/types.h> 391590Srgrimes 401590Srgrimes#include <err.h> 411590Srgrimes#include <stdlib.h> 421590Srgrimes#include <stdio.h> 431590Srgrimes#include <string.h> 441590Srgrimes 451590Srgrimes#include "extern.h" 461590Srgrimes 471590Srgrimesvoid 481590Srgrimesc_special(fd1, file1, skip1, fd2, file2, skip2) 491590Srgrimes int fd1, fd2; 501590Srgrimes char *file1, *file2; 511590Srgrimes off_t skip1, skip2; 521590Srgrimes{ 531590Srgrimes int ch1, ch2; 541590Srgrimes off_t byte, line; 551590Srgrimes FILE *fp1, *fp2; 561590Srgrimes int dfound; 571590Srgrimes 581590Srgrimes if ((fp1 = fdopen(fd1, "r")) == NULL) 591590Srgrimes err(ERR_EXIT, "%s", file1); 601590Srgrimes if ((fp2 = fdopen(fd2, "r")) == NULL) 611590Srgrimes err(ERR_EXIT, "%s", file2); 621590Srgrimes 6321429Sjoerg dfound = 0; 641590Srgrimes while (skip1--) 651590Srgrimes if (getc(fp1) == EOF) 661590Srgrimes goto eof; 671590Srgrimes while (skip2--) 681590Srgrimes if (getc(fp2) == EOF) 691590Srgrimes goto eof; 701590Srgrimes 711590Srgrimes for (byte = line = 1;; ++byte) { 721590Srgrimes ch1 = getc(fp1); 731590Srgrimes ch2 = getc(fp2); 741590Srgrimes if (ch1 == EOF || ch2 == EOF) 751590Srgrimes break; 761590Srgrimes if (ch1 != ch2) 771590Srgrimes if (lflag) { 781590Srgrimes dfound = 1; 791590Srgrimes (void)printf("%6qd %3o %3o\n", byte, ch1, ch2); 801590Srgrimes } else 811590Srgrimes diffmsg(file1, file2, byte, line); 821590Srgrimes /* NOTREACHED */ 831590Srgrimes if (ch1 == '\n') 841590Srgrimes ++line; 851590Srgrimes } 861590Srgrimes 871590Srgrimeseof: if (ferror(fp1)) 881590Srgrimes err(ERR_EXIT, "%s", file1); 891590Srgrimes if (ferror(fp2)) 901590Srgrimes err(ERR_EXIT, "%s", file2); 911590Srgrimes if (feof(fp1)) { 921590Srgrimes if (!feof(fp2)) 931590Srgrimes eofmsg(file1); 941590Srgrimes } else 951590Srgrimes if (feof(fp2)) 961590Srgrimes eofmsg(file2); 971590Srgrimes if (dfound) 981590Srgrimes exit(DIFF_EXIT); 991590Srgrimes} 100