/*
* Mini du implementation for busybox
*
+ * Copyright (C) 1999,2000,2001 by Lineo, inc. and John Beppu
+ * Copyright (C) 1999,2000,2001 by John Beppu <beppu@codepoet.org>
+ * Copyright (C) 2002 Edward Betts <edward@debian.org>
*
- * Copyright (C) 1999,2000,2001 by Lineo, inc.
- * Written by John Beppu <beppu@lineo.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
-#include <sys/types.h>
-#include <fcntl.h>
-#include <dirent.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <getopt.h>
-#include <string.h>
-#include <errno.h>
-#include "busybox.h"
+/* BB_AUDIT SUSv3 compliant (unless default blocksize set to 1k) */
+/* http://www.opengroup.org/onlinepubs/007904975/utilities/du.html */
+/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
+ *
+ * Mostly rewritten for SUSv3 compliance and to fix bugs/defects.
+ * 1) Added support for SUSv3 -a, -H, -L, gnu -c, and (busybox) -d options.
+ * The -d option allows setting of max depth (similar to gnu --max-depth).
+ * 2) Fixed incorrect size calculations for links and directories, especially
+ * when errors occurred. Calculates sizes should now match gnu du output.
+ * 3) Added error checking of output.
+ * 4) Fixed busybox bug #1284 involving long overflow with human_readable.
+ */
-#ifdef BB_FEATURE_HUMAN_READABLE
-static unsigned long disp_hr = KILOBYTE;
-#endif
-
-typedef void (Display) (long, char *);
+//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: "\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" IF_FEATURE_DU_DEFAULT_BLOCKSIZE_1K(" (default)")
+//usage: IF_NOT_FEATURE_DU_DEFAULT_BLOCKSIZE_1K(
+//usage: "\n Default unit is 512 bytes"
+//usage: )
+//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"
-static int du_depth = 0;
-static int count_hardlinks = 0;
+#include "libbb.h"
-static Display *print;
+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),
+};
-static void print_normal(long size, char *filename)
-{
- unsigned long base;
-#ifdef BB_FEATURE_HUMAN_READABLE
- switch (disp_hr) {
- case MEGABYTE:
- base = KILOBYTE;
- break;
- case KILOBYTE:
- base = 1;
- break;
- default:
- base = 0;
- }
- printf("%s\t%s\n", make_human_readable_str(size, base), filename);
+struct globals {
+#if ENABLE_FEATURE_HUMAN_READABLE
+ unsigned long disp_hr;
#else
- printf("%ld\t%s\n", size, filename);
+ 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)
+#define INIT_G() do { } while (0)
-static void print_summary(long size, char *filename)
+
+/* FIXME? coreutils' du rounds sizes up:
+ * for example, 1025k file is shown as "2" by du -m.
+ * We round to nearest.
+ */
+static void print(unsigned long long size, const char *filename)
{
- if (du_depth == 1) {
- print_normal(size, filename);
+ /* TODO - May not want to defer error checking here. */
+#if ENABLE_FEATURE_HUMAN_READABLE
+ 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 (G.disp_k) {
+ size++;
+ size >>= 1;
}
+ printf("%llu\t%s\n", size, filename);
+#endif
}
/* tiny recursive du */
-static long du(char *filename)
+static unsigned long long du(const char *filename)
{
struct stat statbuf;
- long sum;
+ unsigned long long sum;
- if ((lstat(filename, &statbuf)) != 0) {
- perror_msg("%s", filename);
+ if (lstat(filename, &statbuf) != 0) {
+ bb_simple_perror_msg(filename);
+ G.status = EXIT_FAILURE;
return 0;
}
- du_depth++;
- sum = (statbuf.st_blocks >> 1);
+ 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;
- /* Don't add in stuff pointed to by symbolic links */
if (S_ISLNK(statbuf.st_mode)) {
- sum = 0L;
- if (du_depth == 1)
- print(sum, filename);
+ if (G.slink_depth > G.du_depth) { /* -H or -L */
+ if (stat(filename, &statbuf) != 0) {
+ bb_simple_perror_msg(filename);
+ G.status = EXIT_FAILURE;
+ return 0;
+ }
+ sum = statbuf.st_blocks;
+ if (G.slink_depth == 1) {
+ /* Convert -H to -L */
+ G.slink_depth = INT_MAX;
+ }
+ }
+ }
+
+ 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;
+ }
+ add_to_ino_dev_hashtable(&statbuf, NULL);
}
+
if (S_ISDIR(statbuf.st_mode)) {
DIR *dir;
struct dirent *entry;
char *newfile;
- dir = opendir(filename);
+ dir = warn_opendir(filename);
if (!dir) {
- du_depth--;
- return 0;
+ G.status = EXIT_FAILURE;
+ return sum;
}
- newfile = last_char_is(filename, '/');
- if (newfile)
- *newfile = '\0';
-
while ((entry = readdir(dir))) {
- char *name = entry->d_name;
-
- if ((strcmp(name, "..") == 0)
- || (strcmp(name, ".") == 0)) {
+ newfile = concat_subpath_file(filename, entry->d_name);
+ if (newfile == NULL)
continue;
- }
- newfile = concat_path_file(filename, name);
+ ++G.du_depth;
sum += du(newfile);
+ --G.du_depth;
free(newfile);
}
closedir(dir);
- print(sum, filename);
+ } else {
+ if (!(option_mask32 & OPT_a_files_too) && G.du_depth != 0)
+ return sum;
}
- else if (statbuf.st_nlink > 1 && !count_hardlinks) {
- /* Add files with hard links only once */
- if (is_in_ino_dev_hashtable(&statbuf, NULL)) {
- sum = 0L;
- if (du_depth == 1)
- print(sum, filename);
- }
- else {
- add_to_ino_dev_hashtable(&statbuf, NULL);
- }
+ if (G.du_depth <= G.max_print_depth) {
+ print(sum, filename);
}
- du_depth--;
return sum;
}
-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)
{
- int status = EXIT_SUCCESS;
- int i;
- int c;
+ unsigned long long total;
+ int slink_depth_save;
+ unsigned opt;
- /* default behaviour */
- print = print_normal;
+ INIT_G();
- /* parse argv[] */
- while ((c = getopt(argc, argv, "sl"
-#ifdef BB_FEATURE_HUMAN_READABLE
-"hm"
+#if ENABLE_FEATURE_HUMAN_READABLE
+ 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
+ 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
-"k")) != EOF) {
- switch (c) {
- case 's':
- print = print_summary;
- break;
- case 'l':
- count_hardlinks = 1;
- break;
-#ifdef BB_FEATURE_HUMAN_READABLE
- case 'h': disp_hr = 0; break;
- case 'm': disp_hr = MEGABYTE; break;
+ 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
+ * du implementations may produce output when -a and -s are used together.
+ * gnu du exits with an error code in this case. We choose to simply
+ * 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: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 & OPT_m_mbytes) {
+ G.disp_hr = 1024*1024;
+ }
+ if (opt & OPT_k_kbytes) {
+ G.disp_hr = 1024;
+ }
+#else
+ 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 & OPT_k_kbytes) {
+ G.disp_k = 1;
+ }
#endif
- case 'k': break;
- default:
- show_usage();
- }
+#endif
+ if (opt & OPT_H_follow_links) {
+ G.slink_depth = 1;
+ }
+ if (opt & OPT_L_follow_links) {
+ G.slink_depth = INT_MAX;
+ }
+ if (opt & OPT_s_total_norecurse) {
+ G.max_print_depth = 0;
}
/* go through remaining args (if any) */
- if (optind >= argc) {
- if (du(".") == 0)
- status = EXIT_FAILURE;
- } else {
- long sum;
-
- for (i=optind; i < argc; i++) {
- if ((sum = du(argv[i])) == 0)
- status = EXIT_FAILURE;
- if(is_directory(argv[i], FALSE, NULL)==FALSE) {
- print_normal(sum, argv[i]);
- }
- reset_ino_dev_hashtable();
+ if (!*argv) {
+ *--argv = (char*)".";
+ if (G.slink_depth == 1) {
+ G.slink_depth = 0;
}
}
- return status;
-}
+ slink_depth_save = G.slink_depth;
+ total = 0;
+ do {
+ total += du(*argv);
+ /* otherwise du /dir /dir won't show /dir twice: */
+ reset_ino_dev_hashtable();
+ G.slink_depth = slink_depth_save;
+ } while (*++argv);
-/* $Id: du.c,v 1.47 2001/05/07 22:49:43 andersen Exp $ */
-/*
-Local Variables:
-c-file-style: "linux"
-c-basic-offset: 4
-tab-width: 4
-End:
-*/
+ if (opt & OPT_c_total)
+ print(total, "total");
+
+ fflush_stdout_and_exit(G.status);
+}
projects / platform / upstream / busybox.git / blobdiff