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