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/* vi: set sw=4 ts=4: */
/*
* Mini cmp implementation for busybox
*
* Copyright (C) 2000,2001 by Matt Kraai <kraai@alumni.carnegiemellon.edu>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <stdlib.h>
#include <getopt.h>
#include "busybox.h"
int cmp_main(int argc, char **argv)
{
FILE *fp1 = NULL, *fp2 = stdin;
char *filename1, *filename2 = "-";
int c, c1, c2, char_pos = 1, line_pos = 1, silent = FALSE;
while ((c = getopt(argc, argv, "s")) != EOF) {
switch (c) {
case 's':
silent = TRUE;
break;
default:
show_usage();
}
}
filename1 = argv[optind];
switch (argc - optind) {
case 2:
fp2 = xfopen(filename2 = argv[optind + 1], "r");
case 1:
fp1 = xfopen(filename1, "r");
break;
default:
show_usage();
}
do {
c1 = fgetc(fp1);
c2 = fgetc(fp2);
if (c1 != c2) {
if (silent)
return EXIT_FAILURE;
if (c1 == EOF)
printf("EOF on %s\n", filename1);
else if (c2 == EOF)
printf("EOF on %s\n", filename2);
else
printf("%s %s differ: char %d, line %d\n", filename1, filename2,
char_pos, line_pos);
return EXIT_FAILURE;
}
char_pos++;
if (c1 == '\n')
line_pos++;
} while (c1 != EOF);
return EXIT_SUCCESS;
}
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