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 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #if 0 31 #ifndef lint 32 static char sccsid[] = "@(#)special.c 8.3 (Berkeley) 4/2/94"; 33 #endif 34 #endif 35 36 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD$"); 38 39 #include <sys/types.h> 40 41 #include <err.h> 42 #include <stdlib.h> 43 #include <stdio.h> 44 45 #include "extern.h" 46 47 void 48 c_special(int fd1, const char *file1, off_t skip1, 49 int fd2, const char *file2, off_t skip2) 50 { 51 int ch1, ch2; 52 off_t byte, line; 53 FILE *fp1, *fp2; 54 int dfound; 55 56 if ((fp1 = fdopen(fd1, "r")) == NULL) 57 err(ERR_EXIT, "%s", file1); 58 if ((fp2 = fdopen(fd2, "r")) == NULL) 59 err(ERR_EXIT, "%s", file2); 60 61 dfound = 0; 62 while (skip1--) 63 if (getc(fp1) == EOF) 64 goto eof; 65 while (skip2--) 66 if (getc(fp2) == EOF) 67 goto eof; 68 69 for (byte = line = 1;; ++byte) { 70 ch1 = getc(fp1); 71 ch2 = getc(fp2); 72 if (ch1 == EOF || ch2 == EOF) 73 break; 74 if (ch1 != ch2) { 75 if (xflag) { 76 dfound = 1; 77 (void)printf("%08llx %02x %02x\n", 78 (long long)byte - 1, ch1, ch2); 79 } else if (lflag) { 80 dfound = 1; 81 (void)printf("%6lld %3o %3o\n", 82 (long long)byte, ch1, ch2); 83 } else { 84 diffmsg(file1, file2, byte, line); 85 /* NOTREACHED */ 86 } 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