1 /* $OpenBSD: special.c,v 1.4 2001/07/12 05:16:58 deraadt Exp $ */ 2 /* $NetBSD: special.c,v 1.2 1995/09/08 03:23:00 tls Exp $ */ 3 4 /*- 5 * Copyright (c) 1991, 1993, 1994 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "@(#)special.c 8.3 (Berkeley) 4/2/94"; 40 #else 41 static char rcsid[] = "$OpenBSD: special.c,v 1.4 2001/07/12 05:16:58 deraadt Exp $"; 42 #endif 43 #endif /* not lint */ 44 45 #include <sys/types.h> 46 47 #include <err.h> 48 #include <stdlib.h> 49 #include <stdio.h> 50 #include <string.h> 51 52 #include "extern.h" 53 54 void 55 c_special(fd1, file1, skip1, fd2, file2, skip2) 56 int fd1, fd2; 57 char *file1, *file2; 58 off_t skip1, skip2; 59 { 60 int ch1, ch2; 61 off_t byte, line; 62 FILE *fp1, *fp2; 63 int dfound; 64 65 if ((fp1 = fdopen(fd1, "r")) == NULL) 66 err(ERR_EXIT, "%s", file1); 67 if ((fp2 = fdopen(fd2, "r")) == NULL) 68 err(ERR_EXIT, "%s", file2); 69 70 dfound = 0; 71 while (skip1--) 72 if (getc(fp1) == EOF) 73 goto eof; 74 while (skip2--) 75 if (getc(fp2) == EOF) 76 goto eof; 77 78 for (byte = line = 1;; ++byte) { 79 ch1 = getc(fp1); 80 ch2 = getc(fp2); 81 if (ch1 == EOF || ch2 == EOF) 82 break; 83 if (ch1 != ch2) { 84 if (lflag) { 85 dfound = 1; 86 (void)printf("%6lld %3o %3o\n", (long long)byte, 87 ch1, ch2); 88 } else 89 diffmsg(file1, file2, byte, line); 90 /* NOTREACHED */ 91 } 92 if (ch1 == '\n') 93 ++line; 94 } 95 96 eof: if (ferror(fp1)) 97 err(ERR_EXIT, "%s", file1); 98 if (ferror(fp2)) 99 err(ERR_EXIT, "%s", file2); 100 if (feof(fp1)) { 101 if (!feof(fp2)) 102 eofmsg(file1); 103 } else 104 if (feof(fp2)) 105 eofmsg(file2); 106 if (dfound) 107 exit(DIFF_EXIT); 108 } 109