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authorGravatar Eric Andersen <andersen@codepoet.org>2001-06-01 21:47:15 +0000
committerGravatar Eric Andersen <andersen@codepoet.org>2001-06-01 21:47:15 +0000
commit8b113f93b9b9157ea1e013667eaaf00aed97a251 (patch)
treec833c8f3a72637660af61b061b90d69d987fed25 /coreutils/du.c
parent4f6753e586dba5e6c240e670d41fc8fd011034e1 (diff)
downloadbusybox-8b113f93b9b9157ea1e013667eaaf00aed97a251.tar.gz
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Vladimir's last_patch13, containing several bugfixes.
Diffstat (limited to 'coreutils/du.c')
-rw-r--r--coreutils/du.c74
1 files changed, 73 insertions, 1 deletions
diff --git a/coreutils/du.c b/coreutils/du.c
index 3e4821a39..fd19855e1 100644
--- a/coreutils/du.c
+++ b/coreutils/du.c
@@ -71,6 +71,78 @@ static void print_summary(long size, char *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)
{
@@ -187,7 +259,7 @@ int du_main(int argc, char **argv)
return status;
}
-/* $Id: du.c,v 1.47 2001/05/07 22:49:43 andersen Exp $ */
+/* $Id: du.c,v 1.48 2001/06/01 21:47:15 andersen Exp $ */
/*
Local Variables:
c-file-style: "linux"