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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>
static int print_count;
static int print_uniq = 1;
static int print_duplicates = 1;
static void print_line(char *line, int count, FILE *fp)
{
if ((print_duplicates && count > 1) || (print_uniq && count == 1)) {
if (print_count)
fprintf(fp, "%7d\t%s", count, line);
else
fputs(line, fp);
}
}
int uniq_main(int argc, char **argv)
{
FILE *in = stdin, *out = stdout;
char *lastline = NULL, *input;
int opt, count = 0;
/* parse argv[] */
while ((opt = getopt(argc, argv, "cdu")) > 0) {
switch (opt) {
case 'c':
print_count = 1;
break;
case 'd':
print_duplicates = 1;
print_uniq = 0;
break;
case 'u':
print_duplicates = 0;
print_uniq = 1;
break;
}
}
if (argv[optind] != NULL) {
in = xfopen(argv[optind], "r");
if (argv[optind+1] != NULL)
out = xfopen(argv[optind+1], "w");
}
while ((input = get_line_from_file(in)) != NULL) {
if (lastline == NULL || strcmp(input, lastline) != 0) {
print_line(lastline, count, out);
free(lastline);
lastline = input;
count = 0;
}
count++;
}
print_line(lastline, count, out);
free(lastline);
return EXIT_SUCCESS;
}
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