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-rw-r--r--cmp.c80
1 files changed, 0 insertions, 80 deletions
diff --git a/cmp.c b/cmp.c
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1/* vi: set sw=4 ts=4: */
2/*
3 * Mini cmp implementation for busybox
4 *
5 *
6 * Copyright (C) 1999,2000,2001 by Lineo, inc.
7 * Written by Matt Kraai <kraai@alumni.carnegiemellon.edu>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 */
24
25#include <stdio.h>
26#include <string.h>
27#include <errno.h>
28#include <stdlib.h>
29#include <getopt.h>
30#include "busybox.h"
31
32int cmp_main(int argc, char **argv)
33{
34 FILE *fp1 = NULL, *fp2 = stdin;
35 char *filename1, *filename2 = "-";
36 int c, c1, c2, char_pos = 1, line_pos = 1, silent = FALSE;
37
38 while ((c = getopt(argc, argv, "s")) != EOF) {
39 switch (c) {
40 case 's':
41 silent = TRUE;
42 break;
43 default:
44 show_usage();
45 }
46 }
47
48 filename1 = argv[optind];
49 switch (argc - optind) {
50 case 2:
51 fp2 = xfopen(filename2 = argv[optind + 1], "r");
52 case 1:
53 fp1 = xfopen(filename1, "r");
54 break;
55 default:
56 show_usage();
57 }
58
59 do {
60 c1 = fgetc(fp1);
61 c2 = fgetc(fp2);
62 if (c1 != c2) {
63 if (silent)
64 return EXIT_FAILURE;
65 if (c1 == EOF)
66 printf("EOF on %s\n", filename1);
67 else if (c2 == EOF)
68 printf("EOF on %s\n", filename2);
69 else
70 printf("%s %s differ: char %d, line %d\n", filename1, filename2,
71 char_pos, line_pos);
72 return EXIT_FAILURE;
73 }
74 char_pos++;
75 if (c1 == '\n')
76 line_pos++;
77 } while (c1 != EOF);
78
79 return EXIT_SUCCESS;
80}