Annotation of src/usr.bin/cmp/special.c, Revision 1.2
1.2 ! deraadt 1: /* $OpenBSD: special.c,v 1.2 1995/09/08 03:23:00 tls Exp $ */
1.1 deraadt 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. All advertising materials mentioning features or use of this software
17: * must display the following acknowledgement:
18: * This product includes software developed by the University of
19: * California, Berkeley and its contributors.
20: * 4. Neither the name of the University nor the names of its contributors
21: * may be used to endorse or promote products derived from this software
22: * without specific prior written permission.
23: *
24: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34: * SUCH DAMAGE.
35: */
36:
37: #ifndef lint
38: #if 0
39: static char sccsid[] = "@(#)special.c 8.3 (Berkeley) 4/2/94";
40: #else
1.2 ! deraadt 41: static char rcsid[] = "$OpenBSD: special.c,v 1.2 1995/09/08 03:23:00 tls Exp $";
1.1 deraadt 42: #endif
43: #endif /* not lint */
44:
45: #include <sys/types.h>
46:
47: #include <err.h>
48: #include <stdlib.h>
49: #include <stdio.h>
50: #include <string.h>
51:
52: #include "extern.h"
53:
54: void
55: c_special(fd1, file1, skip1, fd2, file2, skip2)
56: int fd1, fd2;
57: char *file1, *file2;
58: off_t skip1, skip2;
59: {
60: int ch1, ch2;
61: off_t byte, line;
62: FILE *fp1, *fp2;
63: int dfound;
64:
65: if ((fp1 = fdopen(fd1, "r")) == NULL)
66: err(ERR_EXIT, "%s", file1);
67: if ((fp2 = fdopen(fd2, "r")) == NULL)
68: err(ERR_EXIT, "%s", file2);
69:
70: while (skip1--)
71: if (getc(fp1) == EOF)
72: goto eof;
73: while (skip2--)
74: if (getc(fp2) == EOF)
75: goto eof;
76:
77: dfound = 0;
78: for (byte = line = 1;; ++byte) {
79: ch1 = getc(fp1);
80: ch2 = getc(fp2);
81: if (ch1 == EOF || ch2 == EOF)
82: break;
83: if (ch1 != ch2)
84: if (lflag) {
85: dfound = 1;
86: (void)printf("%6qd %3o %3o\n", byte, ch1, ch2);
87: } else
88: diffmsg(file1, file2, byte, line);
89: /* NOTREACHED */
90: if (ch1 == '\n')
91: ++line;
92: }
93:
94: eof: if (ferror(fp1))
95: err(ERR_EXIT, "%s", file1);
96: if (ferror(fp2))
97: err(ERR_EXIT, "%s", file2);
98: if (feof(fp1)) {
99: if (!feof(fp2))
100: eofmsg(file1);
101: } else
102: if (feof(fp2))
103: eofmsg(file2);
104: if (dfound)
105: exit(DIFF_EXIT);
106: }