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-rw-r--r--utility.c80
1 files changed, 77 insertions, 3 deletions
diff --git a/utility.c b/utility.c
index 0279cca..c8ce392 100644
--- a/utility.c
+++ b/utility.c
@@ -122,7 +122,76 @@ int get_kernel_revision()
}
#endif /* BB_INIT || BB_PS */
+#if defined (BB_CP_MV) || defined (BB_DU)
+#define HASH_SIZE 311 /* Should be prime */
+#define hash_inode(i) ((i) % HASH_SIZE)
+
+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.
+ */
+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 */
+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 = malloc(sizeof(ino_dev_hashtable_bucket_t) + s);
+ if (bucket == NULL)
+ fatalError("Not enough memory.");
+ 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 */
+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;
+ }
+ }
+}
+
+#endif /* BB_CP_MV || BB_DU */
#if defined (BB_CP_MV) || defined (BB_DU) || defined (BB_LN)
/*
@@ -161,7 +230,7 @@ int isDirectory(const char *fileName, const int followLinks, struct stat *statBu
/*
* Copy one file to another, while possibly preserving its modes, times,
* and modes. Returns TRUE if successful, or FALSE on a failure with an
- * error message output. (Failure is not indicted if the attributes cannot
+ * error message output. (Failure is not indicated if the attributes cannot
* be set.)
* -Erik Andersen
*/
@@ -1335,6 +1404,11 @@ extern void whine_if_fstab_is_missing()
}
#endif
-
-
/* END CODE */
+/*
+Local Variables:
+c-file-style: "linux"
+c-basic-offset: 4
+tab-width: 4
+End:
+*/