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147 lines
3.0 KiB
C
147 lines
3.0 KiB
C
/*
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* Mini du implementation for busybox
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*
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*
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* Copyright (C) 1999 by Lineo, inc.
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* Written by John Beppu <beppu@lineo.com>
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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 "internal.h"
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#include <sys/types.h>
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#include <fcntl.h>
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#include <dirent.h>
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#include <stdio.h>
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#include <errno.h>
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#if 0
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#include <unistd.h>
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#include <sys/stat.h>
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#endif
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typedef void (Display)(size_t, char *);
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static const char du_usage[] =
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"Usage: du [OPTION]... [FILE]...\n\n"
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"\t-s\tdisplay only a total for each argument\n"
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;
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static int du_depth = 0;
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static Display *print;
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static void
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print_null(size_t size, char *filename) { }
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static void
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print_normal(size_t size, char *filename)
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{
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fprintf(stdout, "%-7d %s\n", (size >> 1), filename);
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}
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static void
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print_summary(size_t size, char *filename)
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{
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if (du_depth == 1) {
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print_normal(size, filename);
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}
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}
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/* tiny recursive du */
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static size_t
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du(char *filename)
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{
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struct stat statbuf;
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size_t sum;
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if ((lstat(filename, &statbuf)) != 0) {
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fprintf(stdout, "du: %s: %s\n", filename, strerror(errno));
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return 0;
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}
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du_depth++;
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sum = statbuf.st_blocks;
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if (S_ISDIR(statbuf.st_mode)) {
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DIR *dir;
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struct dirent *entry;
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dir = opendir(filename);
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if (!dir) { return 0; }
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while ((entry = readdir(dir))) {
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char newfile[512];
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char *name = entry->d_name;
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if ( (strcmp(name, "..") == 0)
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|| (strcmp(name, ".") == 0))
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{ continue; }
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sprintf(newfile, "%s/%s", filename, name);
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sum += du(newfile);
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}
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closedir(dir);
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print(sum, filename);
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}
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du_depth--;
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return sum;
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}
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int
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du_main(int argc, char **argv)
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{
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int i;
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char opt;
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/* default behaviour */
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print = print_normal;
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/* parse argv[] */
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for (i = 1; i < argc; i++) {
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if (argv[i][0] == '-') {
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opt = argv[i][1];
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switch (opt) {
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case 's':
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print = print_summary;
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break;
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case 'h':
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usage(du_usage);
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break;
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default:
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fprintf(stderr, "du: invalid option -- %c\n", opt);
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usage(du_usage);
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}
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} else {
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break;
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}
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}
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/* go through remaining args (if any) */
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if (i >= argc) {
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du(".");
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} else {
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int sum;
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for ( ; i < argc; i++) {
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sum = du(argv[i]);
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if (sum) { print_normal(sum, argv[i]); }
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}
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}
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exit(0);
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}
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/* $Id: du.c,v 1.6 1999/12/15 18:52:17 beppu Exp $ */
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