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https://github.com/topjohnwu/ndk-busybox.git
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90 lines
2.2 KiB
C
90 lines
2.2 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini uniq implementation for busybox
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*
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*
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* Copyright (C) 1999,2000,2001 by Lineo, inc.
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* Written by John Beppu <beppu@lineo.com>
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* Rewritten by Matt Kraai <kraai@alumni.carnegiemellon.edu>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include "busybox.h"
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#include <stdio.h>
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#include <string.h>
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#include <getopt.h>
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#include <errno.h>
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#include <stdlib.h>
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static int print_count;
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static int print_uniq = 1;
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static int print_duplicates = 1;
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static void print_line(char *line, int count, FILE *fp)
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{
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if ((print_duplicates && count > 1) || (print_uniq && count == 1)) {
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if (print_count)
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fprintf(fp, "%7d\t%s", count, line);
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else
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fputs(line, fp);
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}
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}
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int uniq_main(int argc, char **argv)
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{
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FILE *in = stdin, *out = stdout;
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char *lastline = NULL, *input;
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int opt, count = 0;
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/* parse argv[] */
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while ((opt = getopt(argc, argv, "cdu")) > 0) {
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switch (opt) {
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case 'c':
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print_count = 1;
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break;
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case 'd':
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print_duplicates = 1;
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print_uniq = 0;
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break;
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case 'u':
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print_duplicates = 0;
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print_uniq = 1;
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break;
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}
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}
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if (argv[optind] != NULL) {
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in = xfopen(argv[optind], "r");
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if (argv[optind+1] != NULL)
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out = xfopen(argv[optind+1], "w");
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}
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while ((input = get_line_from_file(in)) != NULL) {
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if (lastline == NULL || strcmp(input, lastline) != 0) {
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print_line(lastline, count, out);
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free(lastline);
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lastline = input;
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count = 0;
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}
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count++;
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}
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print_line(lastline, count, out);
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free(lastline);
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return EXIT_SUCCESS;
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}
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