* Mini du implementation for busybox
*
*
- * Copyright (C) 1999 by Lineo, inc.
+ * 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
*
*/
-#include "internal.h"
-#define BB_DECLARE_EXTERN
-#define bb_need_name_too_long
-#include "messages.c"
-
#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 <sys/param.h> /* for PATH_MAX */
-
-typedef void (Display) (long, char *);
-
-typedef struct inode_type {
- struct inode_type *next;
- ino_t ino;
-} INODETYPE;
+#include "busybox.h"
-#define HASH_SIZE 311 /* Should be prime */
-#define hash_inode(i) ((i) % HASH_SIZE)
-static INODETYPE *inode_hash_list[HASH_SIZE];
+#ifdef BB_FEATURE_HUMAN_READABLE
+static unsigned long disp_hr = KILOBYTE;
+#endif
-static const char du_usage[] =
- "du [OPTION]... [FILE]...\n\n"
- "Summarize disk space used for each FILE and/or directory.\n"
- "Disk space is printed in units of 1024 bytes.\n\n"
- "Options:\n"
- "\t-l\tcount sizes many times if hard linked\n"
- "\t-s\tdisplay only a total for each argument\n";
+typedef void (Display) (long, char *);
static int du_depth = 0;
static int count_hardlinks = 0;
static void print_normal(long size, char *filename)
{
- fprintf(stdout, "%ld\t%s\n", size, filename);
+#ifdef BB_FEATURE_HUMAN_READABLE
+ printf("%s\t%s\n", make_human_readable_str(size<<10, 1, disp_hr), filename);
+#else
+ printf("%ld\t%s\n", size, filename);
+#endif
}
static void print_summary(long size, char *filename)
}
}
-/* Return 1 if inode is in inode hash list, else return 0 */
-static int is_in_list(const ino_t ino)
+#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)
{
- INODETYPE *inode;
+ ino_dev_hashtable_bucket_t *bucket;
- inode = inode_hash_list[hash_inode(ino)];
- while (inode != NULL) {
- if (inode->ino == ino)
- return 1;
- inode = inode->next;
+ 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 inode to inode hash list */
-static void add_inode(const ino_t ino)
+/* 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;
- INODETYPE *inode;
-
- i = hash_inode(ino);
- inode = malloc(sizeof(INODETYPE));
- if (inode == NULL)
- fatalError("du: Not enough memory.");
-
- inode->ino = ino;
- inode->next = inode_hash_list[i];
- inode_hash_list[i] = inode;
+ 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 */
long sum;
if ((lstat(filename, &statbuf)) != 0) {
- fprintf(stdout, "du: %s: %s\n", filename, strerror(errno));
+ perror_msg("%s", filename);
return 0;
}
/* Don't add in stuff pointed to by symbolic links */
if (S_ISLNK(statbuf.st_mode)) {
- return 0;
+ sum = 0L;
+ if (du_depth == 1) {
+ }
}
if (S_ISDIR(statbuf.st_mode)) {
DIR *dir;
struct dirent *entry;
+ char *newfile;
dir = opendir(filename);
if (!dir) {
+ du_depth--;
return 0;
}
+
+ newfile = last_char_is(filename, '/');
+ if (newfile)
+ *newfile = '\0';
+
while ((entry = readdir(dir))) {
- char newfile[PATH_MAX + 1];
char *name = entry->d_name;
if ((strcmp(name, "..") == 0)
|| (strcmp(name, ".") == 0)) {
continue;
}
-
- if (strlen(filename) + strlen(name) + 1 > PATH_MAX) {
- fprintf(stderr, name_too_long, "du");
- return 0;
- }
- sprintf(newfile, "%s/%s", filename, name);
-
+ newfile = concat_path_file(filename, name);
sum += du(newfile);
+ free(newfile);
}
closedir(dir);
print(sum, filename);
}
else if (statbuf.st_nlink > 1 && !count_hardlinks) {
/* Add files with hard links only once */
- if (is_in_list(statbuf.st_ino))
- return 0;
- add_inode(statbuf.st_ino);
+ 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);
+ }
}
du_depth--;
return sum;
int du_main(int argc, char **argv)
{
+ int status = EXIT_SUCCESS;
int i;
- char opt;
+ int c;
/* default behaviour */
print = print_normal;
/* parse argv[] */
- for (i = 1; i < argc; i++) {
- if (argv[i][0] == '-') {
- opt = argv[i][1];
- switch (opt) {
+ while ((c = getopt(argc, argv, "sl"
+#ifdef BB_FEATURE_HUMAN_READABLE
+"hm"
+#endif
+"k")) != EOF) {
+ switch (c) {
case 's':
- print = print_summary;
- break;
+ print = print_summary;
+ break;
case 'l':
- count_hardlinks = 1;
- break;
- case 'h':
- case '-':
- usage(du_usage);
- break;
+ 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:
- fprintf(stderr, "du: invalid option -- %c\n", opt);
- usage(du_usage);
+ show_usage();
}
- } else {
- break;
- }
}
/* go through remaining args (if any) */
- if (i >= argc) {
- du(".");
+ if (optind >= argc) {
+ if (du(".") == 0)
+ status = EXIT_FAILURE;
} else {
long sum;
- for (; i < argc; i++) {
+ for (i=optind; i < argc; i++) {
sum = du(argv[i]);
- if ((sum) && (isDirectory(argv[i], FALSE, NULL))) {
+ if(is_directory(argv[i], FALSE, NULL)==FALSE) {
print_normal(sum, argv[i]);
}
+ reset_ino_dev_hashtable();
}
}
- exit(0);
+ return status;
}
-/* $Id: du.c,v 1.14 2000/02/19 18:16:49 erik Exp $ */
+/* $Id: du.c,v 1.50 2001/06/30 17:54:20 andersen Exp $ */
+/*
+Local Variables:
+c-file-style: "linux"
+c-basic-offset: 4
+tab-width: 4
+End:
+*/
projects / oweals / busybox.git / blobdiff