1 /* $OpenBSD: special.c,v 1.5 2003/06/03 02:56:06 millert 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. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "@(#)special.c 8.3 (Berkeley) 4/2/94"; 36 #else 37 static char rcsid[] = "$OpenBSD: special.c,v 1.5 2003/06/03 02:56:06 millert Exp $"; 38 #endif 39 #endif /* not lint */ 40 41 #include <sys/types.h> 42 43 #include <err.h> 44 #include <stdlib.h> 45 #include <stdio.h> 46 #include <string.h> 47 48 #include "extern.h" 49 50 void 51 c_special(fd1, file1, skip1, fd2, file2, skip2) 52 int fd1, fd2; 53 char *file1, *file2; 54 off_t skip1, skip2; 55 { 56 int ch1, ch2; 57 off_t byte, line; 58 FILE *fp1, *fp2; 59 int dfound; 60 61 if ((fp1 = fdopen(fd1, "r")) == NULL) 62 err(ERR_EXIT, "%s", file1); 63 if ((fp2 = fdopen(fd2, "r")) == NULL) 64 err(ERR_EXIT, "%s", file2); 65 66 dfound = 0; 67 while (skip1--) 68 if (getc(fp1) == EOF) 69 goto eof; 70 while (skip2--) 71 if (getc(fp2) == EOF) 72 goto eof; 73 74 for (byte = line = 1;; ++byte) { 75 ch1 = getc(fp1); 76 ch2 = getc(fp2); 77 if (ch1 == EOF || ch2 == EOF) 78 break; 79 if (ch1 != ch2) { 80 if (lflag) { 81 dfound = 1; 82 (void)printf("%6lld %3o %3o\n", (long long)byte, 83 ch1, ch2); 84 } else 85 diffmsg(file1, file2, byte, line); 86 /* NOTREACHED */ 87 } 88 if (ch1 == '\n') 89 ++line; 90 } 91 92 eof: if (ferror(fp1)) 93 err(ERR_EXIT, "%s", file1); 94 if (ferror(fp2)) 95 err(ERR_EXIT, "%s", file2); 96 if (feof(fp1)) { 97 if (!feof(fp2)) 98 eofmsg(file1); 99 } else 100 if (feof(fp2)) 101 eofmsg(file2); 102 if (dfound) 103 exit(DIFF_EXIT); 104 } 105