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
c_special(fd1,file1,skip1,fd2,file2,skip2)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