1 /* vi: set sw=4 ts=4: */
3 * Mini du implementation for busybox
6 * Copyright (C) 1999 by Lineo, inc.
7 * Written by John Beppu <beppu@lineo.com>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 #define BB_DECLARE_EXTERN
27 #define bb_need_name_too_long
30 #include <sys/types.h>
35 #include <sys/param.h> /* for PATH_MAX */
37 typedef void (Display) (long, char *);
39 static const char du_usage[] =
40 "du [OPTION]... [FILE]...\n\n"
41 "Summarize disk space used for each FILE and/or directory.\n"
42 "Disk space is printed in units of 1024 bytes.\n\n"
44 "\t-l\tcount sizes many times if hard linked\n"
45 "\t-s\tdisplay only a total for each argument\n";
47 static int du_depth = 0;
48 static int count_hardlinks = 0;
50 static Display *print;
52 static void print_normal(long size, char *filename)
54 fprintf(stdout, "%ld\t%s\n", size, filename);
57 static void print_summary(long size, char *filename)
60 print_normal(size, filename);
64 /* tiny recursive du */
65 static long du(char *filename)
71 if ((lstat(filename, &statbuf)) != 0) {
72 printf("du: %s: %s\n", filename, strerror(errno));
77 sum = (statbuf.st_blocks >> 1);
79 /* Don't add in stuff pointed to by symbolic links */
80 if (S_ISLNK(statbuf.st_mode)) {
85 if (S_ISDIR(statbuf.st_mode)) {
89 dir = opendir(filename);
95 len = strlen(filename);
96 if (filename[len - 1] == '/')
97 filename[--len] = '\0';
99 while ((entry = readdir(dir))) {
100 char newfile[PATH_MAX + 1];
101 char *name = entry->d_name;
103 if ((strcmp(name, "..") == 0)
104 || (strcmp(name, ".") == 0)) {
108 if (len + strlen(name) + 1 > PATH_MAX) {
109 fprintf(stderr, name_too_long, "du");
113 sprintf(newfile, "%s/%s", filename, name);
118 print(sum, filename);
120 else if (statbuf.st_nlink > 1 && !count_hardlinks) {
121 /* Add files with hard links only once */
122 if (is_in_ino_dev_hashtable(&statbuf, NULL)) {
125 print(sum, filename);
128 add_to_ino_dev_hashtable(&statbuf, NULL);
135 int du_main(int argc, char **argv)
140 /* default behaviour */
141 print = print_normal;
144 for (i = 1; i < argc; i++) {
145 if (argv[i][0] == '-') {
149 print = print_summary;
159 fprintf(stderr, "du: invalid option -- %c\n", opt);
167 /* go through remaining args (if any) */
173 for (; i < argc; i++) {
175 if (sum && isDirectory(argv[i], FALSE, NULL)) {
176 print_normal(sum, argv[i]);
178 reset_ino_dev_hashtable();
185 /* $Id: du.c,v 1.16 2000/03/04 21:19:32 erik Exp $ */
188 c-file-style: "linux"