1 /* $NetBSD: special.c,v 1.7 2001/01/04 23:05:54 lukem Exp $ */ 2 3 /*- 4 * Copyright (c) 1991, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "@(#)special.c 8.3 (Berkeley) 4/2/94"; 40 #else 41 __RCSID("$NetBSD: special.c,v 1.7 2001/01/04 23:05:54 lukem 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 dfound = 0; 66 if ((fp1 = fdopen(fd1, "r")) == NULL) 67 err(ERR_EXIT, "%s", file1); 68 if ((fp2 = fdopen(fd2, "r")) == NULL) 69 err(ERR_EXIT, "%s", file2); 70 71 while (skip1--) 72 if (getc(fp1) == EOF) 73 goto eof; 74 while (skip2--) 75 if (getc(fp2) == EOF) 76 goto eof; 77 78 dfound = 0; 79 for (byte = line = 1;; ++byte) { 80 ch1 = getc(fp1); 81 ch2 = getc(fp2); 82 if (ch1 == EOF || ch2 == EOF) 83 break; 84 if (ch1 != ch2) { 85 if (lflag) { 86 dfound = 1; 87 (void)printf("%6lld %3o %3o\n", (long long)byte, 88 ch1, ch2); 89 } else 90 diffmsg(file1, file2, byte, line); 91 /* NOTREACHED */ 92 } 93 if (ch1 == '\n') 94 ++line; 95 } 96 97 eof: if (ferror(fp1)) 98 err(ERR_EXIT, "%s", file1); 99 if (ferror(fp2)) 100 err(ERR_EXIT, "%s", file2); 101 if (feof(fp1)) { 102 if (!feof(fp2)) 103 eofmsg(file1); 104 } else 105 if (feof(fp2)) 106 eofmsg(file2); 107 if (dfound) 108 exit(DIFF_EXIT); 109 } 110