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
c_special(int fd1,const char * file1,off_t skip1,int fd2,const char * file2,off_t skip2)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