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/* vi: set sw=4 ts=4: */
/*
* Mini uniq implementation for busybox
*
*
* Copyright (C) 1999,2000 by Lineo, inc.
* Written by John Beppu <beppu@lineo.com>
* Rewritten 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 "busybox.h"
#include <stdio.h>
#include <string.h>
#include <errno.h>
int uniq_main(int argc, char **argv)
{
FILE *in = stdin, *out = stdout;
char *lastline = NULL, *input;
/* parse argv[] */
if ((argc > 1 && **(argv + 1) == '-') || argc > 3)
usage(uniq_usage);
if (argv[1] != NULL) {
in = xfopen(argv[1], "r");
if (argv[2] != NULL)
out = xfopen(argv[2], "w");
}
while ((input = get_line_from_file(in)) != NULL) {
if (lastline == NULL || strcmp(input, lastline) != 0) {
fputs(input, out);
free(lastline);
lastline = input;
}
}
free(lastline);
return EXIT_SUCCESS;
}
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