1 /*- 2 * Copyright (c) 1991, 1993, 1994 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 * $FreeBSD: src/usr.bin/cmp/special.c,v 1.4.2.1 2001/11/21 10:47:54 dwmalone Exp $ 34 * $DragonFly: src/usr.bin/cmp/special.c,v 1.3 2003/10/02 17:42:27 hmp Exp $ 35 * 36 * @(#)special.c 8.3 (Berkeley) 4/2/94 37 */ 38 39 #include <sys/types.h> 40 41 #include <err.h> 42 #include <stdlib.h> 43 #include <stdio.h> 44 #include <string.h> 45 46 #include "extern.h" 47 48 void 49 c_special(int fd1, const char *file1, off_t skip1, int fd2, const char *file2, 50 off_t skip2) 51 { 52 int ch1, ch2; 53 off_t byte, line; 54 FILE *fp1, *fp2; 55 int dfound; 56 57 if ((fp1 = fdopen(fd1, "r")) == NULL) 58 err(ERR_EXIT, "%s", file1); 59 if ((fp2 = fdopen(fd2, "r")) == NULL) 60 err(ERR_EXIT, "%s", file2); 61 62 dfound = 0; 63 while (skip1--) 64 if (getc(fp1) == EOF) 65 goto eof; 66 while (skip2--) 67 if (getc(fp2) == EOF) 68 goto eof; 69 70 for (byte = line = 1;; ++byte) { 71 ch1 = getc(fp1); 72 ch2 = getc(fp2); 73 if (ch1 == EOF || ch2 == EOF) 74 break; 75 if (ch1 != ch2) { 76 if (xflag) { 77 dfound = 1; 78 printf("%08jx %02x %02x\n", 79 (intmax_t)byte - 1, ch1, ch2); 80 } else if (lflag) { 81 dfound = 1; 82 printf("%6jd %3o %3o\n", 83 (intmax_t)byte, ch1, ch2); 84 } else { 85 diffmsg(file1, file2, byte, line); 86 /* NOTREACHED */ 87 } 88 } 89 if (ch1 == '\n') 90 ++line; 91 } 92 93 eof: if (ferror(fp1)) 94 err(ERR_EXIT, "%s", file1); 95 if (ferror(fp2)) 96 err(ERR_EXIT, "%s", file2); 97 if (feof(fp1)) { 98 if (!feof(fp2)) 99 eofmsg(file1); 100 } else 101 if (feof(fp2)) 102 eofmsg(file2); 103 if (dfound) 104 exit(DIFF_EXIT); 105 } 106