+/* vi: set sw=4 ts=4: */
/*
* 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 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 tarball for details.
*/
-#include "internal.h"
-#include <sys/types.h>
-#include <fcntl.h>
-#include <dirent.h>
-#include <stdio.h>
-#include <errno.h>
-#if 0
-#include <unistd.h>
-#include <sys/stat.h>
-#endif
+/* BB_AUDIT SUSv3 compliant (unless default blocksize set to 1k) */
+/* http://www.opengroup.org/onlinepubs/007904975/utilities/du.html */
-typedef void (Display)(size_t, char *);
+/* 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.
+ */
-static const char du_usage[] =
-"Usage: du [OPTION]... [FILE]...\n\n"
-"\t-s\tdisplay only a total for each argument\n"
-;
+#include "busybox.h"
+
+#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;
+#else
+static unsigned disp_k; /* bss inits to 0 */
+#endif
-static int du_depth = 0;
+static int max_print_depth = INT_MAX;
+static nlink_t count_hardlinks = 1;
-static Display *print;
+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_null(size_t size, char *filename) { }
-static void
-print_normal(size_t size, char *filename)
+static void print(long size, const char * const filename)
{
- fprintf(stdout, "%-7d %s\n", (size >> 1), 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),
+ filename);
+#else
+ if (disp_k) {
+ size++;
+ size >>= 1;
+ }
+ printf("%ld\t%s\n", size, filename);
+#endif
}
-static void
-print_summary(size_t size, char *filename)
+/* tiny recursive du */
+static long du(const char * const filename)
{
- if (du_depth == 1) {
- print_normal(size, filename);
- }
-}
+ struct stat statbuf;
+ long sum;
+ if (lstat(filename, &statbuf) != 0) {
+ bb_perror_msg("%s", filename);
+ status = EXIT_FAILURE;
+ return 0;
+ }
-/* tiny recursive du */
-static size_t
-du(char *filename)
-{
- struct stat statbuf;
- size_t sum;
-
- if ((lstat(filename, &statbuf)) != 0) {
- fprintf(stdout, "du: %s: %s\n", filename, strerror(errno));
- return 0;
- }
-
- du_depth++;
- sum = statbuf.st_blocks;
-
- if (S_ISDIR(statbuf.st_mode)) {
- DIR *dir;
- struct dirent *entry;
-
- dir = opendir(filename);
- if (!dir) { return 0; }
- while ((entry = readdir(dir))) {
- char newfile[512];
- char *name = entry->d_name;
-
- if ( (strcmp(name, "..") == 0)
- || (strcmp(name, ".") == 0))
- { continue; }
-
- sprintf(newfile, "%s/%s", filename, name);
- sum += du(newfile);
- }
- closedir(dir);
- print(sum, filename);
- }
- du_depth--;
- return sum;
+ if (one_file_system) {
+ if (du_depth == 0) {
+ dir_dev = statbuf.st_dev;
+ } else if (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 (stat(filename, &statbuf) != 0) {
+ bb_perror_msg("%s", filename);
+ status = EXIT_FAILURE;
+ return 0;
+ }
+ sum = statbuf.st_blocks;
+ if (slink_depth == 1) {
+ slink_depth = INT_MAX; /* Convert -H to -L. */
+ }
+ }
+ }
+
+ if (statbuf.st_nlink > count_hardlinks) {
+ /* Add files/directories with links only once */
+ if (is_in_ino_dev_hashtable(&statbuf, NULL)) {
+ return 0;
+ }
+ add_to_ino_dev_hashtable(&statbuf, NULL);
+ }
+
+ if (S_ISDIR(statbuf.st_mode)) {
+ DIR *dir;
+ struct dirent *entry;
+ char *newfile;
+
+ dir = warn_opendir(filename);
+ if (!dir) {
+ 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);
+ if (newfile == NULL)
+ continue;
+ ++du_depth;
+ sum += du(newfile);
+ --du_depth;
+ free(newfile);
+ }
+ closedir(dir);
+ } else if (du_depth > print_files) {
+ return sum;
+ }
+ if (du_depth <= max_print_depth) {
+ print(sum, filename);
+ }
+ return sum;
}
-int
-du_main(int argc, char **argv)
+int du_main(int argc, char **argv)
{
- int i;
- char opt;
-
- /* default behaviour */
- print = print_normal;
-
- /* parse argv[] */
- for (i = 1; i < argc; i++) {
- if (argv[i][0] == '-') {
- opt = argv[i][1];
- switch (opt) {
- case 's':
- print = print_summary;
- break;
- case 'h':
- usage(du_usage);
- break;
- default:
- fprintf(stderr, "du: invalid option -- %c\n", opt);
- usage(du_usage);
- }
- } else {
- break;
- }
- }
-
- /* go through remaining args (if any) */
- if (i >= argc) {
- du(".");
- } else {
- int sum;
- for ( ; i < argc; i++) {
- sum = du(argv[i]);
- if ((sum) && (isDirectory(argv[i]))) { print_normal(sum, argv[i]); }
- }
- }
-
- exit(0);
-}
+ 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;
+#else
+ disp_k = 0;
+#endif
+ }
+#endif
-/* $Id: du.c,v 1.7 1999/12/16 21:16:47 beppu Exp $ */
+ /* 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";
+ opt = getopt32(argc, argv, "aHkLsx" "d:" "lc" "hm", &smax_print_depth);
+ if (opt & (1 << 9)) {
+ /* -h opt */
+ disp_hr = 0;
+ }
+ if (opt & (1 << 10)) {
+ /* -m opt */
+ disp_hr = 1024*1024;
+ }
+ if (opt & (1 << 2)) {
+ /* -k opt */
+ disp_hr = 1024;
+ }
+#else
+ opt_complementary = "H-L:L-H:s-d:d-s";
+ opt = getopt32(argc, argv, "aHkLsx" "d:" "lc", &smax_print_depth);
+#if !ENABLE_FEATURE_DU_DEFAULT_BLOCKSIZE_1K
+ if (opt & (1 << 2)) {
+ /* -k opt */
+ 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 & (1 << 4)) {
+ /* -s opt */
+ max_print_depth = 0;
+ }
+ one_file_system = opt & (1 << 5); /* -x opt */
+ if (opt & (1 << 6)) {
+ /* -d opt */
+ max_print_depth = xatoi_u(smax_print_depth);
+ }
+ 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) {
+ *--argv = ".";
+ if (slink_depth == 1) {
+ slink_depth = 0;
+ }
+ }
+
+ slink_depth_save = slink_depth;
+ total = 0;
+ do {
+ total += du(*argv);
+ slink_depth = slink_depth_save;
+ } while (*++argv);
+#if ENABLE_FEATURE_CLEAN_UP
+ reset_ino_dev_hashtable();
+#endif
+
+ if (print_final_total) {
+ print(total, "total");
+ }
+
+ fflush_stdout_and_exit(status);
+}
projects / oweals / busybox.git / blobdiff