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.
28 #ifdef CONFIG_FEATURE_HUMAN_READABLE
29 # ifdef CONFIG_FEATURE_DU_DEFAULT_BLOCKSIZE_1K
30 static unsigned long disp_hr = KILOBYTE;
32 static unsigned long disp_hr = 512;
34 #elif defined CONFIG_FEATURE_DU_DEFAULT_BLOCKSIZE_1K
35 static unsigned int disp_k = 1;
37 static unsigned int disp_k; /* bss inits to 0 */
40 static int max_print_depth = INT_MAX;
41 static nlink_t count_hardlinks = 1;
48 static int print_files;
49 static int slink_depth;
51 static int one_file_system;
55 static void print(long size, const char * const filename)
57 /* TODO - May not want to defer error checking here. */
58 #ifdef CONFIG_FEATURE_HUMAN_READABLE
59 bb_printf("%s\t%s\n", make_human_readable_str(size, 512, disp_hr),
66 bb_printf("%ld\t%s\n", size, filename);
70 /* tiny recursive du */
71 static long du(const char * const filename)
76 if ((lstat(filename, &statbuf)) != 0) {
77 bb_perror_msg("%s", filename);
78 status = EXIT_FAILURE;
82 if (one_file_system) {
84 dir_dev = statbuf.st_dev;
85 } else if (dir_dev != statbuf.st_dev) {
90 sum = statbuf.st_blocks;
92 if (S_ISLNK(statbuf.st_mode)) {
93 if (slink_depth > du_depth) { /* -H or -L */
94 if ((stat(filename, &statbuf)) != 0) {
95 bb_perror_msg("%s", filename);
96 status = EXIT_FAILURE;
99 sum = statbuf.st_blocks;
100 if (slink_depth == 1) {
101 slink_depth = INT_MAX; /* Convert -H to -L. */
106 if (statbuf.st_nlink > count_hardlinks) {
107 /* Add files/directories with links only once */
108 if (is_in_ino_dev_hashtable(&statbuf, NULL)) {
111 add_to_ino_dev_hashtable(&statbuf, NULL);
114 if (S_ISDIR(statbuf.st_mode)) {
116 struct dirent *entry;
119 dir = warn_opendir(filename);
121 status = EXIT_FAILURE;
125 newfile = last_char_is(filename, '/');
129 while ((entry = readdir(dir))) {
130 char *name = entry->d_name;
132 newfile = concat_subpath_file(filename, name);
141 } else if (du_depth > print_files) {
144 if (du_depth <= max_print_depth) {
145 print(sum, filename);
150 int du_main(int argc, char **argv)
153 int slink_depth_save;
154 int print_final_total;
155 char *smax_print_depth;
158 #ifdef CONFIG_FEATURE_DU_DEFUALT_BLOCKSIZE_1K
159 if (getenv("POSIXLY_CORRECT")) { /* TODO - a new libbb function? */
160 #ifdef CONFIG_FEATURE_HUMAN_READABLE
168 /* Note: SUSv3 specifies that -a and -s options cannot be used together
169 * in strictly conforming applications. However, it also says that some
170 * du implementations may produce output when -a and -s are used together.
171 * gnu du exits with an error code in this case. We choose to simply
172 * ignore -a. This is consistent with -s being equivalent to -d 0.
174 #ifdef CONFIG_FEATURE_HUMAN_READABLE
175 opt_complementary = "h-km:k-hm:m-hk:H-L:L-H:s-d:d-s";
176 opt = getopt32(argc, argv, "aHkLsx" "d:" "lc" "hm", &smax_print_depth);
177 if((opt & (1 << 9))) {
181 if((opt & (1 << 10))) {
185 if((opt & (1 << 2))) {
190 opt_complementary = "H-L:L-H:s-d:d-s";
191 opt = getopt32(argc, argv, "aHkLsx" "d:" "lc", &smax_print_depth);
192 #if !defined CONFIG_FEATURE_DU_DEFAULT_BLOCKSIZE_1K
193 if((opt & (1 << 2))) {
199 if((opt & (1 << 0))) {
201 print_files = INT_MAX;
203 if((opt & (1 << 1))) {
207 if((opt & (1 << 3))) {
209 slink_depth = INT_MAX;
211 if((opt & (1 << 4))) {
215 one_file_system = opt & (1 << 5); /* -x opt */
216 if((opt & (1 << 6))) {
218 max_print_depth = xatoi_u(smax_print_depth);
220 if((opt & (1 << 7))) {
222 count_hardlinks = INT_MAX;
224 print_final_total = opt & (1 << 8); /* -c opt */
226 /* go through remaining args (if any) */
228 if (optind >= argc) {
230 if (slink_depth == 1) {
235 slink_depth_save = slink_depth;
239 slink_depth = slink_depth_save;
241 #ifdef CONFIG_FEATURE_CLEAN_UP
242 reset_ino_dev_hashtable();
245 if (print_final_total) {
246 print(total, "total");
249 bb_fflush_stdout_and_exit(status);