* Copyright (C) 1999,2000,2001 by John Beppu <beppu@codepoet.org>
* Copyright (C) 2002 Edward Betts <edward@debian.org>
*
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
/* BB_AUDIT SUSv3 compliant (unless default blocksize set to 1k) */
* 4) Fixed busybox bug #1284 involving long overflow with human_readable.
*/
+//usage:#define du_trivial_usage
+//usage: "[-aHLdclsx" IF_FEATURE_HUMAN_READABLE("hm") "k] [FILE]..."
+//usage:#define du_full_usage "\n\n"
+//usage: "Summarize disk space used for each FILE and/or directory.\n"
+//usage: "Disk space is printed in units of "
+//usage: IF_FEATURE_DU_DEFAULT_BLOCKSIZE_1K("1024")
+//usage: IF_NOT_FEATURE_DU_DEFAULT_BLOCKSIZE_1K("512")
+//usage: " bytes.\n"
+//usage: "\n -a Show file sizes too"
+//usage: "\n -L Follow all symlinks"
+//usage: "\n -H Follow symlinks on command line"
+//usage: "\n -d N Limit output to directories (and files with -a) of depth < N"
+//usage: "\n -c Show grand total"
+//usage: "\n -l Count sizes many times if hard linked"
+//usage: "\n -s Display only a total for each argument"
+//usage: "\n -x Skip directories on different filesystems"
+//usage: IF_FEATURE_HUMAN_READABLE(
+//usage: "\n -h Sizes in human readable format (e.g., 1K 243M 2G )"
+//usage: "\n -m Sizes in megabytes"
+//usage: )
+//usage: "\n -k Sizes in kilobytes"
+//usage: IF_FEATURE_DU_DEFAULT_BLOCKSIZE_1K(" (default)")
+//usage:
+//usage:#define du_example_usage
+//usage: "$ du\n"
+//usage: "16 ./CVS\n"
+//usage: "12 ./kernel-patches/CVS\n"
+//usage: "80 ./kernel-patches\n"
+//usage: "12 ./tests/CVS\n"
+//usage: "36 ./tests\n"
+//usage: "12 ./scripts/CVS\n"
+//usage: "16 ./scripts\n"
+//usage: "12 ./docs/CVS\n"
+//usage: "104 ./docs\n"
+//usage: "2417 .\n"
+
#include "libbb.h"
+enum {
+ OPT_a_files_too = (1 << 0),
+ OPT_H_follow_links = (1 << 1),
+ OPT_k_kbytes = (1 << 2),
+ OPT_L_follow_links = (1 << 3),
+ OPT_s_total_norecurse = (1 << 4),
+ OPT_x_one_FS = (1 << 5),
+ OPT_d_maxdepth = (1 << 6),
+ OPT_l_hardlinks = (1 << 7),
+ OPT_c_total = (1 << 8),
+ OPT_h_for_humans = (1 << 9),
+ OPT_m_mbytes = (1 << 10),
+};
+
+struct globals {
#if ENABLE_FEATURE_HUMAN_READABLE
-# if ENABLE_FEATURE_DU_DEFAULT_BLOCKSIZE_1K
-static unsigned long disp_hr = 1024;
-# else
-static unsigned long disp_hr = 512;
-# endif
-#elif ENABLE_FEATURE_DU_DEFAULT_BLOCKSIZE_1K
-static unsigned disp_k = 1;
+ unsigned long disp_hr;
#else
-static unsigned disp_k; /* bss inits to 0 */
+ unsigned disp_k;
#endif
+ int max_print_depth;
+ bool status;
+ int slink_depth;
+ int du_depth;
+ dev_t dir_dev;
+} FIX_ALIASING;
+#define G (*(struct globals*)&bb_common_bufsiz1)
-static int max_print_depth = INT_MAX;
-static nlink_t count_hardlinks = 1;
-
-static int status;
-static int print_files;
-static int slink_depth;
-static int du_depth;
-static int one_file_system;
-static dev_t dir_dev;
-
-static void print(long size, const char *const filename)
+static void print(unsigned long size, const char *filename)
{
/* TODO - May not want to defer error checking here. */
#if ENABLE_FEATURE_HUMAN_READABLE
- printf("%s\t%s\n", make_human_readable_str(size, 512, disp_hr),
+ printf("%s\t%s\n",
+ /* size x 512 / G.disp_hr, show one fractional,
+ * use suffixes if G.disp_hr == 0 */
+ make_human_readable_str(size, 512, G.disp_hr),
filename);
#else
- if (disp_k) {
+ if (G.disp_k) {
size++;
size >>= 1;
}
- printf("%ld\t%s\n", size, filename);
+ printf("%lu\t%s\n", size, filename);
#endif
}
/* tiny recursive du */
-static long du(const char *const filename)
+static unsigned long du(const char *filename)
{
struct stat statbuf;
- long sum;
+ unsigned long sum;
if (lstat(filename, &statbuf) != 0) {
- bb_perror_msg("%s", filename);
- status = EXIT_FAILURE;
+ bb_simple_perror_msg(filename);
+ G.status = EXIT_FAILURE;
return 0;
}
- if (one_file_system) {
- if (du_depth == 0) {
- dir_dev = statbuf.st_dev;
- } else if (dir_dev != statbuf.st_dev) {
+ if (option_mask32 & OPT_x_one_FS) {
+ if (G.du_depth == 0) {
+ G.dir_dev = statbuf.st_dev;
+ } else if (G.dir_dev != statbuf.st_dev) {
return 0;
}
}
sum = statbuf.st_blocks;
if (S_ISLNK(statbuf.st_mode)) {
- if (slink_depth > du_depth) { /* -H or -L */
+ if (G.slink_depth > G.du_depth) { /* -H or -L */
if (stat(filename, &statbuf) != 0) {
- bb_perror_msg("%s", filename);
- status = EXIT_FAILURE;
+ bb_simple_perror_msg(filename);
+ G.status = EXIT_FAILURE;
return 0;
}
sum = statbuf.st_blocks;
- if (slink_depth == 1) {
- slink_depth = INT_MAX; /* Convert -H to -L. */
+ if (G.slink_depth == 1) {
+ /* Convert -H to -L */
+ G.slink_depth = INT_MAX;
}
}
}
- if (statbuf.st_nlink > count_hardlinks) {
+ if (!(option_mask32 & OPT_l_hardlinks)
+ && statbuf.st_nlink > 1
+ ) {
/* Add files/directories with links only once */
if (is_in_ino_dev_hashtable(&statbuf)) {
return 0;
dir = warn_opendir(filename);
if (!dir) {
- status = EXIT_FAILURE;
+ G.status = EXIT_FAILURE;
return sum;
}
- newfile = last_char_is(filename, '/');
- if (newfile)
- *newfile = '\0';
-
while ((entry = readdir(dir))) {
- char *name = entry->d_name;
-
- newfile = concat_subpath_file(filename, name);
+ newfile = concat_subpath_file(filename, entry->d_name);
if (newfile == NULL)
continue;
- ++du_depth;
+ ++G.du_depth;
sum += du(newfile);
- --du_depth;
+ --G.du_depth;
free(newfile);
}
closedir(dir);
- } else if (du_depth > print_files) {
- return sum;
+ } else {
+ if (!(option_mask32 & OPT_a_files_too) && G.du_depth != 0)
+ return sum;
}
- if (du_depth <= max_print_depth) {
+ if (G.du_depth <= G.max_print_depth) {
print(sum, filename);
}
return sum;
}
-int du_main(int argc, char **argv);
-int du_main(int argc, char **argv)
+int du_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int du_main(int argc UNUSED_PARAM, char **argv)
{
- long total;
+ unsigned long total;
int slink_depth_save;
- int print_final_total;
- char *smax_print_depth;
unsigned opt;
-#if ENABLE_FEATURE_DU_DEFAULT_BLOCKSIZE_1K
- if (getenv("POSIXLY_CORRECT")) { /* TODO - a new libbb function? */
#if ENABLE_FEATURE_HUMAN_READABLE
- disp_hr = 512;
+ IF_FEATURE_DU_DEFAULT_BLOCKSIZE_1K(G.disp_hr = 1024;)
+ IF_NOT_FEATURE_DU_DEFAULT_BLOCKSIZE_1K(G.disp_hr = 512;)
+ if (getenv("POSIXLY_CORRECT")) /* TODO - a new libbb function? */
+ G.disp_hr = 512;
#else
- disp_k = 0;
-#endif
- }
+ IF_FEATURE_DU_DEFAULT_BLOCKSIZE_1K(G.disp_k = 1;)
+ /* IF_NOT_FEATURE_DU_DEFAULT_BLOCKSIZE_1K(G.disp_k = 0;) - G is pre-zeroed */
#endif
+ G.max_print_depth = INT_MAX;
/* Note: SUSv3 specifies that -a and -s options cannot be used together
* in strictly conforming applications. However, it also says that some
* ignore -a. This is consistent with -s being equivalent to -d 0.
*/
#if ENABLE_FEATURE_HUMAN_READABLE
- opt_complementary = "h-km:k-hm:m-hk:H-L:L-H:s-d:d-s";
- opt = getopt32(argv, "aHkLsx" "d:" "lc" "hm", &smax_print_depth);
- if (opt & (1 << 9)) {
- /* -h opt */
- disp_hr = 0;
+ opt_complementary = "h-km:k-hm:m-hk:H-L:L-H:s-d:d-s:d+";
+ opt = getopt32(argv, "aHkLsx" "d:" "lc" "hm", &G.max_print_depth);
+ argv += optind;
+ if (opt & OPT_h_for_humans) {
+ G.disp_hr = 0;
}
- if (opt & (1 << 10)) {
- /* -m opt */
- disp_hr = 1024*1024;
+ if (opt & OPT_m_mbytes) {
+ G.disp_hr = 1024*1024;
}
- if (opt & (1 << 2)) {
- /* -k opt */
- disp_hr = 1024;
+ if (opt & OPT_k_kbytes) {
+ G.disp_hr = 1024;
}
#else
- opt_complementary = "H-L:L-H:s-d:d-s";
- opt = getopt32(argv, "aHkLsx" "d:" "lc", &smax_print_depth);
+ opt_complementary = "H-L:L-H:s-d:d-s:d+";
+ opt = getopt32(argv, "aHkLsx" "d:" "lc", &G.max_print_depth);
+ argv += optind;
#if !ENABLE_FEATURE_DU_DEFAULT_BLOCKSIZE_1K
- if (opt & (1 << 2)) {
- /* -k opt */
- disp_k = 1;
+ if (opt & OPT_k_kbytes) {
+ G.disp_k = 1;
}
#endif
#endif
- if (opt & (1 << 0)) {
- /* -a opt */
- print_files = INT_MAX;
- }
- if (opt & (1 << 1)) {
- /* -H opt */
- slink_depth = 1;
- }
- if (opt & (1 << 3)) {
- /* -L opt */
- slink_depth = INT_MAX;
+ if (opt & OPT_H_follow_links) {
+ G.slink_depth = 1;
}
- if (opt & (1 << 4)) {
- /* -s opt */
- max_print_depth = 0;
+ if (opt & OPT_L_follow_links) {
+ G.slink_depth = INT_MAX;
}
- one_file_system = opt & (1 << 5); /* -x opt */
- if (opt & (1 << 6)) {
- /* -d opt */
- max_print_depth = xatoi_u(smax_print_depth);
+ if (opt & OPT_s_total_norecurse) {
+ G.max_print_depth = 0;
}
- if (opt & (1 << 7)) {
- /* -l opt */
- count_hardlinks = MAXINT(nlink_t);
- }
- print_final_total = opt & (1 << 8); /* -c opt */
/* go through remaining args (if any) */
- argv += optind;
- if (optind >= argc) {
+ if (!*argv) {
*--argv = (char*)".";
- if (slink_depth == 1) {
- slink_depth = 0;
+ if (G.slink_depth == 1) {
+ G.slink_depth = 0;
}
}
- slink_depth_save = slink_depth;
+ slink_depth_save = G.slink_depth;
total = 0;
do {
total += du(*argv);
- slink_depth = slink_depth_save;
- } while (*++argv);
- if (ENABLE_FEATURE_CLEAN_UP)
+ /* otherwise du /dir /dir won't show /dir twice: */
reset_ino_dev_hashtable();
- if (print_final_total) {
+ G.slink_depth = slink_depth_save;
+ } while (*++argv);
+
+ if (opt & OPT_c_total)
print(total, "total");
- }
- fflush_stdout_and_exit(status);
+ fflush_stdout_and_exit(G.status);
}
projects / oweals / busybox.git / blobdiff