1 /* vi: set sw=4 ts=4: */
3 * Mini du implementation for busybox
5 * Copyright (C) 1999,2000,2001 by Lineo, inc. and John Beppu
6 * Copyright (C) 1999,2000,2001 by John Beppu <beppu@codepoet.org>
7 * Copyright (C) 2002 Edward Betts <edward@debian.org>
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
25 /* BB_AUDIT SUSv3 compliant (unless default blocksize set to 1k) */
26 /* http://www.opengroup.org/onlinepubs/007904975/utilities/du.html */
28 /* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
30 * Mostly rewritten for SUSv3 compliance and to fix bugs/defects.
31 * 1) Added support for SUSv3 -a, -H, -L, gnu -c, and (busybox) -d options.
32 * The -d option allows setting of max depth (similar to gnu --max-depth).
33 * 2) Fixed incorrect size calculations for links and directories, especially
34 * when errors occurred. Calculates sizes should now match gnu du output.
35 * 3) Added error checking of output.
36 * 4) Fixed busybox bug #1284 involving long overflow with human_readable.
46 #ifdef CONFIG_FEATURE_HUMAN_READABLE
47 # ifdef CONFIG_FEATURE_DU_DEFALT_BLOCKSIZE_1K
48 static unsigned long disp_hr = KILOBYTE;
50 static unsigned long disp_hr = 512;
52 #elif defined CONFIG_FEATURE_DU_DEFALT_BLOCKSIZE_1K
53 static unsigned int disp_k = 1;
55 static unsigned int disp_k; /* bss inits to 0 */
58 static int max_print_depth = INT_MAX;
59 static int count_hardlinks = INT_MAX;
66 static int print_files;
67 static int slink_depth;
69 static int one_file_system;
73 static void print(long size, char *filename)
75 /* TODO - May not want to defer error checking here. */
76 #ifdef CONFIG_FEATURE_HUMAN_READABLE
77 bb_printf("%s\t%s\n", make_human_readable_str(size, 512, disp_hr),
80 bb_printf("%ld\t%s\n", size >> disp_k, filename);
84 /* tiny recursive du */
85 static long du(char *filename)
90 if ((lstat(filename, &statbuf)) != 0) {
91 bb_perror_msg("%s", filename);
92 status = EXIT_FAILURE;
96 if (one_file_system) {
98 dir_dev = statbuf.st_dev;
99 } else if (dir_dev != statbuf.st_dev) {
104 sum = statbuf.st_blocks;
106 if (S_ISLNK(statbuf.st_mode)) {
107 if (slink_depth > du_depth) { /* -H or -L */
108 if ((stat(filename, &statbuf)) != 0) {
109 bb_perror_msg("%s", filename);
110 status = EXIT_FAILURE;
113 sum = statbuf.st_blocks;
114 if (slink_depth == 1) {
115 slink_depth = INT_MAX; /* Convert -H to -L. */
120 if (statbuf.st_nlink > count_hardlinks) {
121 /* Add files/directories with links only once */
122 if (is_in_ino_dev_hashtable(&statbuf, NULL)) {
125 add_to_ino_dev_hashtable(&statbuf, NULL);
128 if (S_ISDIR(statbuf.st_mode)) {
130 struct dirent *entry;
133 dir = opendir(filename);
135 bb_perror_msg("%s", filename);
136 status = EXIT_FAILURE;
140 newfile = last_char_is(filename, '/');
144 while ((entry = readdir(dir))) {
145 char *name = entry->d_name;
147 if ((name[0] == '.') && (!name[1] || (name[1] == '.' && !name[2]))) {
150 newfile = concat_path_file(filename, name);
157 } else if (du_depth > print_files) {
160 if (du_depth <= max_print_depth) {
161 print(sum, filename);
166 int du_main(int argc, char **argv)
169 int slink_depth_save;
170 int print_final_total = 0;
173 #ifdef CONFIG_FEATURE_DU_DEFALT_BLOCKSIZE_1K
174 if (getenv("POSIXLY_CORRECT")) { /* TODO - a new libbb function? */
175 #ifdef CONFIG_FEATURE_HUMAN_READABLE
183 /* Note: SUSv3 specifies that -a and -s options can not be used together
184 * in strictly conforming applications. However, it also says that some
185 * du implementations may produce output when -a and -s are used together.
186 * gnu du exits with an error code in this case. We choose to simply
187 * ignore -a. This is consistent with -s being equivalent to -d 0.
190 while ((c = getopt(argc, argv, "aHkLsx" "d:" "lc"
191 #ifdef CONFIG_FEATURE_HUMAN_READABLE
197 print_files = INT_MAX;
203 #ifdef CONFIG_FEATURE_HUMAN_READABLE
205 #elif !defined CONFIG_FEATURE_DU_DEFALT_BLOCKSIZE_1K
210 slink_depth = INT_MAX;
220 max_print_depth = bb_xgetularg10_bnd(optarg, 0, INT_MAX);
226 print_final_total = 1;
228 #ifdef CONFIG_FEATURE_HUMAN_READABLE
241 /* go through remaining args (if any) */
243 if (optind >= argc) {
245 if (slink_depth == 1) {
250 slink_depth_save = slink_depth;
254 slink_depth = slink_depth_save;
256 reset_ino_dev_hashtable();
258 if (print_final_total) {
259 print(total, "total");
262 bb_fflush_stdout_and_exit(status);