1 /* $NetBSD: special.c,v 1.9 2005/02/06 20:50:34 dsl 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "@(#)special.c 8.3 (Berkeley) 4/2/94"; 36 #else 37 __RCSID("$NetBSD: special.c,v 1.9 2005/02/06 20:50:34 dsl 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(int fd1, char *file1, off_t skip1, int fd2, char *file2, off_t skip2) 52 { 53 int ch1, ch2; 54 off_t byte, line; 55 FILE *fp1, *fp2; 56 int dfound; 57 58 dfound = 0; 59 if ((fp1 = fdopen(fd1, "r")) == NULL) 60 err(ERR_EXIT, "%s", file1); 61 if ((fp2 = fdopen(fd2, "r")) == NULL) 62 err(ERR_EXIT, "%s", file2); 63 64 while (skip1--) 65 if (getc(fp1) == EOF) 66 goto eof; 67 while (skip2--) 68 if (getc(fp2) == EOF) 69 goto eof; 70 71 dfound = 0; 72 for (byte = line = 1;; ++byte) { 73 ch1 = getc(fp1); 74 ch2 = getc(fp2); 75 if (ch1 == EOF || ch2 == EOF) 76 break; 77 if (ch1 != ch2) { 78 if (lflag) { 79 dfound = 1; 80 (void)printf("%6lld %3o %3o\n", (long long)byte, 81 ch1, ch2); 82 } else 83 diffmsg(file1, file2, byte, line); 84 /* NOTREACHED */ 85 } 86 if (ch1 == '\n') 87 ++line; 88 } 89 90 eof: if (ferror(fp1)) 91 err(ERR_EXIT, "%s", file1); 92 if (ferror(fp2)) 93 err(ERR_EXIT, "%s", file2); 94 if (feof(fp1)) { 95 if (!feof(fp2)) 96 eofmsg(file1); 97 } else 98 if (feof(fp2)) 99 eofmsg(file2); 100 if (dfound) 101 exit(DIFF_EXIT); 102 } 103