mirror of
https://github.com/sheumann/hush.git
synced 2024-12-27 16:31:24 +00:00
57 lines
1.5 KiB
C
57 lines
1.5 KiB
C
/* 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;
|
|
}
|