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 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
12 /* BB_AUDIT SUSv3 compliant (unless default blocksize set to 1k) */
13 /* http://www.opengroup.org/onlinepubs/007904975/utilities/du.html */
15 /* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
17 * Mostly rewritten for SUSv3 compliance and to fix bugs/defects.
18 * 1) Added support for SUSv3 -a, -H, -L, gnu -c, and (busybox) -d options.
19 * The -d option allows setting of max depth (similar to gnu --max-depth).
20 * 2) Fixed incorrect size calculations for links and directories, especially
21 * when errors occurred. Calculates sizes should now match gnu du output.
22 * 3) Added error checking of output.
23 * 4) Fixed busybox bug #1284 involving long overflow with human_readable.
33 #ifdef CONFIG_FEATURE_HUMAN_READABLE
34 # ifdef CONFIG_FEATURE_DU_DEFAULT_BLOCKSIZE_1K
35 static unsigned long disp_hr = KILOBYTE;
37 static unsigned long disp_hr = 512;
39 #elif defined CONFIG_FEATURE_DU_DEFAULT_BLOCKSIZE_1K
40 static unsigned int disp_k = 1;
42 static unsigned int disp_k; /* bss inits to 0 */
45 static int max_print_depth = INT_MAX;
46 static nlink_t count_hardlinks = 1;
53 static int print_files;
54 static int slink_depth;
56 static int one_file_system;
60 static void print(long size, char *filename)
62 /* TODO - May not want to defer error checking here. */
63 #ifdef CONFIG_FEATURE_HUMAN_READABLE
64 bb_printf("%s\t%s\n", make_human_readable_str(size, 512, disp_hr),
71 bb_printf("%ld\t%s\n", size, filename);
75 /* tiny recursive du */
76 static long du(char *filename)
81 if ((lstat(filename, &statbuf)) != 0) {
82 bb_perror_msg("%s", filename);
83 status = EXIT_FAILURE;
87 if (one_file_system) {
89 dir_dev = statbuf.st_dev;
90 } else if (dir_dev != statbuf.st_dev) {
95 sum = statbuf.st_blocks;
97 if (S_ISLNK(statbuf.st_mode)) {
98 if (slink_depth > du_depth) { /* -H or -L */
99 if ((stat(filename, &statbuf)) != 0) {
100 bb_perror_msg("%s", filename);
101 status = EXIT_FAILURE;
104 sum = statbuf.st_blocks;
105 if (slink_depth == 1) {
106 slink_depth = INT_MAX; /* Convert -H to -L. */
111 if (statbuf.st_nlink > count_hardlinks) {
112 /* Add files/directories with links only once */
113 if (is_in_ino_dev_hashtable(&statbuf, NULL)) {
116 add_to_ino_dev_hashtable(&statbuf, NULL);
119 if (S_ISDIR(statbuf.st_mode)) {
121 struct dirent *entry;
124 dir = bb_opendir(filename);
126 status = EXIT_FAILURE;
130 newfile = last_char_is(filename, '/');
134 while ((entry = readdir(dir))) {
135 char *name = entry->d_name;
137 newfile = concat_subpath_file(filename, name);
146 } else if (du_depth > print_files) {
149 if (du_depth <= max_print_depth) {
150 print(sum, filename);
155 int du_main(int argc, char **argv)
158 int slink_depth_save;
159 int print_final_total;
160 char *smax_print_depth;
163 #ifdef CONFIG_FEATURE_DU_DEFUALT_BLOCKSIZE_1K
164 if (getenv("POSIXLY_CORRECT")) { /* TODO - a new libbb function? */
165 #ifdef CONFIG_FEATURE_HUMAN_READABLE
173 /* Note: SUSv3 specifies that -a and -s options can not be used together
174 * in strictly conforming applications. However, it also says that some
175 * du implementations may produce output when -a and -s are used together.
176 * gnu du exits with an error code in this case. We choose to simply
177 * ignore -a. This is consistent with -s being equivalent to -d 0.
179 #ifdef CONFIG_FEATURE_HUMAN_READABLE
180 bb_opt_complementally = "h-km:k-hm:m-hk:H-L:L-H:s-d:d-s";
181 opt = bb_getopt_ulflags(argc, argv, "aHkLsx" "d:" "lc" "hm", &smax_print_depth);
182 if((opt & (1 << 9))) {
186 if((opt & (1 << 10))) {
190 if((opt & (1 << 2))) {
195 bb_opt_complementally = "H-L:L-H:s-d:d-s";
196 opt = bb_getopt_ulflags(argc, argv, "aHkLsx" "d:" "lc", &smax_print_depth);
197 #if !defined CONFIG_FEATURE_DU_DEFAULT_BLOCKSIZE_1K
198 if((opt & (1 << 2))) {
204 if((opt & (1 << 0))) {
206 print_files = INT_MAX;
208 if((opt & (1 << 1))) {
212 if((opt & (1 << 3))) {
214 slink_depth = INT_MAX;
216 if((opt & (1 << 4))) {
220 one_file_system = opt & (1 << 5); /* -x opt */
221 if((opt & (1 << 6))) {
223 max_print_depth = bb_xgetularg10_bnd(smax_print_depth, 0, INT_MAX);
225 if((opt & (1 << 7))) {
227 count_hardlinks = INT_MAX;
229 print_final_total = opt & (1 << 8); /* -c opt */
231 /* go through remaining args (if any) */
233 if (optind >= argc) {
235 if (slink_depth == 1) {
240 slink_depth_save = slink_depth;
244 slink_depth = slink_depth_save;
246 #ifdef CONFIG_FEATURE_CLEAN_UP
247 reset_ino_dev_hashtable();
250 if (print_final_total) {
251 print(total, "total");
254 bb_fflush_stdout_and_exit(status);