/*
* 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 tarball for details.
+ */
+
+/* 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.
*/
-#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"
-
-#ifdef BB_FEATURE_HUMAN_READABLE
-static unsigned long disp_hr = KILOBYTE;
+#ifdef CONFIG_FEATURE_HUMAN_READABLE
+# ifdef CONFIG_FEATURE_DU_DEFAULT_BLOCKSIZE_1K
+static unsigned long disp_hr = 1024;
+# else
+static unsigned long disp_hr = 512;
+# endif
+#elif defined CONFIG_FEATURE_DU_DEFAULT_BLOCKSIZE_1K
+static unsigned int disp_k = 1;
+#else
+static unsigned int disp_k; /* bss inits to 0 */
#endif
-typedef void (Display) (long, char *);
+static int max_print_depth = INT_MAX;
+static nlink_t count_hardlinks = 1;
-static int du_depth = 0;
-static int count_hardlinks = 0;
+static int status
+#if EXIT_SUCCESS == 0
+ = EXIT_SUCCESS
+#endif
+ ;
+static int print_files;
+static int slink_depth;
+static int du_depth;
+static int one_file_system;
+static dev_t dir_dev;
-static Display *print;
-static void print_normal(long size, char *filename)
+static void print(long size, const char * const filename)
{
-#ifdef BB_FEATURE_HUMAN_READABLE
- printf("%s\t%s\n", make_human_readable_str(size<<10, 1, disp_hr), filename);
+ /* TODO - May not want to defer error checking here. */
+#ifdef CONFIG_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(long size, char *filename)
-{
- if (du_depth == 1) {
- print_normal(size, filename);
- }
-}
-
-#define HASH_SIZE 311 /* Should be prime */
-#define hash_inode(i) ((i) % HASH_SIZE)
-
-typedef struct ino_dev_hash_bucket_struct {
- struct ino_dev_hash_bucket_struct *next;
- ino_t ino;
- dev_t dev;
- char name[1];
-} ino_dev_hashtable_bucket_t;
-
-static ino_dev_hashtable_bucket_t *ino_dev_hashtable[HASH_SIZE];
-
-/*
- * Return 1 if statbuf->st_ino && statbuf->st_dev are recorded in
- * `ino_dev_hashtable', else return 0
- *
- * If NAME is a non-NULL pointer to a character pointer, and there is
- * a match, then set *NAME to the value of the name slot in that
- * bucket.
- */
-static int is_in_ino_dev_hashtable(const struct stat *statbuf, char **name)
-{
- ino_dev_hashtable_bucket_t *bucket;
-
- bucket = ino_dev_hashtable[hash_inode(statbuf->st_ino)];
- while (bucket != NULL) {
- if ((bucket->ino == statbuf->st_ino) &&
- (bucket->dev == statbuf->st_dev))
- {
- if (name) *name = bucket->name;
- return 1;
- }
- bucket = bucket->next;
- }
- return 0;
-}
-
-/* Add statbuf to statbuf hash table */
-static void add_to_ino_dev_hashtable(const struct stat *statbuf, const char *name)
-{
- int i;
- size_t s;
- ino_dev_hashtable_bucket_t *bucket;
-
- i = hash_inode(statbuf->st_ino);
- s = name ? strlen(name) : 0;
- bucket = xmalloc(sizeof(ino_dev_hashtable_bucket_t) + s);
- bucket->ino = statbuf->st_ino;
- bucket->dev = statbuf->st_dev;
- if (name)
- strcpy(bucket->name, name);
- else
- bucket->name[0] = '\0';
- bucket->next = ino_dev_hashtable[i];
- ino_dev_hashtable[i] = bucket;
-}
-
-/* Clear statbuf hash table */
-static void reset_ino_dev_hashtable(void)
-{
- int i;
- ino_dev_hashtable_bucket_t *bucket;
-
- for (i = 0; i < HASH_SIZE; i++) {
- while (ino_dev_hashtable[i] != NULL) {
- bucket = ino_dev_hashtable[i]->next;
- free(ino_dev_hashtable[i]);
- ino_dev_hashtable[i] = bucket;
- }
- }
-}
-
/* tiny recursive du */
-static long du(char *filename)
+static long du(const char * const filename)
{
struct stat statbuf;
long sum;
if ((lstat(filename, &statbuf)) != 0) {
- perror_msg("%s", filename);
+ bb_perror_msg("%s", filename);
+ status = EXIT_FAILURE;
return 0;
}
- du_depth++;
- sum = (statbuf.st_blocks >> 1);
+ 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;
- /* 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 (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 = opendir(filename);
+ dir = warn_opendir(filename);
if (!dir) {
- du_depth--;
- return 0;
+ status = EXIT_FAILURE;
+ return sum;
}
newfile = last_char_is(filename, '/');
while ((entry = readdir(dir))) {
char *name = entry->d_name;
- if ((strcmp(name, "..") == 0)
- || (strcmp(name, ".") == 0)) {
+ newfile = concat_subpath_file(filename, name);
+ if(newfile == NULL)
continue;
- }
- newfile = concat_path_file(filename, name);
+ ++du_depth;
sum += du(newfile);
+ --du_depth;
free(newfile);
}
closedir(dir);
- print(sum, filename);
+ } else if (du_depth > print_files) {
+ 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 (du_depth <= max_print_depth) {
+ print(sum, filename);
}
- du_depth--;
return sum;
}
int du_main(int argc, char **argv)
{
- int status = EXIT_SUCCESS;
- int i;
- int c;
-
- /* default behaviour */
- print = print_normal;
+ long total;
+ int slink_depth_save;
+ int print_final_total;
+ char *smax_print_depth;
+ unsigned opt;
+
+#ifdef CONFIG_FEATURE_DU_DEFUALT_BLOCKSIZE_1K
+ if (getenv("POSIXLY_CORRECT")) { /* TODO - a new libbb function? */
+#ifdef CONFIG_FEATURE_HUMAN_READABLE
+ disp_hr = 512;
+#else
+ disp_k = 0;
+#endif
+ }
+#endif
- /* parse argv[] */
- while ((c = getopt(argc, argv, "sl"
-#ifdef BB_FEATURE_HUMAN_READABLE
-"hm"
+ /* 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.
+ */
+#ifdef CONFIG_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 !defined CONFIG_FEATURE_DU_DEFAULT_BLOCKSIZE_1K
+ if((opt & (1 << 2))) {
+ /* -k opt */
+ disp_k = 1;
+ }
#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;
#endif
- case 'k': break;
- default:
- show_usage();
- }
+ 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 = INT_MAX;
}
+ print_final_total = opt & (1 << 8); /* -c opt */
/* go through remaining args (if any) */
+ argv += optind;
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();
+ *--argv = ".";
+ if (slink_depth == 1) {
+ slink_depth = 0;
}
}
- return status;
-}
+ slink_depth_save = slink_depth;
+ total = 0;
+ do {
+ total += du(*argv);
+ slink_depth = slink_depth_save;
+ } while (*++argv);
+#ifdef CONFIG_FEATURE_CLEAN_UP
+ reset_ino_dev_hashtable();
+#endif
-/* $Id: du.c,v 1.49 2001/06/13 08:02:44 andersen Exp $ */
-/*
-Local Variables:
-c-file-style: "linux"
-c-basic-offset: 4
-tab-width: 4
-End:
-*/
+ if (print_final_total) {
+ print(total, "total");
+ }
+
+ fflush_stdout_and_exit(status);
+}
projects / oweals / busybox.git / blobdiff