/*
* Find a entry in the specified dir with name _dname_.
*/
static const struct iso_dir_entry *
iso_find_entry(const char *dname, struct inode *inode)
{
struct fs_info *fs = inode->fs;
block_t dir_block = PVT(inode)->lba;
int i = 0, offset = 0;
const char *de_name;
int de_name_len, de_len;
const struct iso_dir_entry *de;
const char *data = NULL;
dprintf("iso_find_entry: \"%s\"\n", dname);
while (1) {
if (!data) {
dprintf("Getting block %d from block %llu\n", i, dir_block);
if (++i > inode->blocks)
return NULL; /* End of directory */
data = get_cache(fs->fs_dev, dir_block++);
offset = 0;
}
de = (const struct iso_dir_entry *)(data + offset);
de_len = de->length;
offset += de_len;
/* Make sure we have a full directory entry */
if (de_len < 33 || offset > BLOCK_SIZE(fs)) {
/*
* Zero = end of sector, or corrupt directory entry
*
* ECMA-119:1987 6.8.1.1: "Each Directory Record shall end
* in the Logical Sector in which it begins.
*/
data = NULL;
continue;
}
de_name_len = de->name_len;
de_name = de->name;
if (iso_compare_name(de_name, de_name_len, dname)) {
dprintf("Found.\n");
return de;
}
}
}
/*
* Find a entry in the specified dir with name _dname_.
*/
static const struct iso_dir_entry *
iso_find_entry(const char *dname, struct inode *inode)
{
struct fs_info *fs = inode->fs;
block_t dir_block = PVT(inode)->lba;
int i = 0, offset = 0;
const char *de_name;
int de_name_len, de_len, rr_name_len, ret;
const struct iso_dir_entry *de;
const char *data = NULL;
char *rr_name = NULL;
dprintf("iso_find_entry: \"%s\"\n", dname);
while (1) {
if (!data) {
dprintf("Getting block %d from block %llu\n", i, dir_block);
if (++i > inode->blocks)
return NULL; /* End of directory */
data = get_cache(fs->fs_dev, dir_block++);
offset = 0;
}
de = (const struct iso_dir_entry *)(data + offset);
de_len = de->length;
offset += de_len;
/* Make sure we have a full directory entry */
if (de_len < 33 || offset > BLOCK_SIZE(fs)) {
/*
* Zero = end of sector, or corrupt directory entry
*
* ECMA-119:1987 6.8.1.1: "Each Directory Record shall end
* in the Logical Sector in which it begins.
*/
data = NULL;
continue;
}
/* Try to get Rock Ridge name */
ret = susp_rr_get_nm(fs, (char *) de, &rr_name, &rr_name_len);
if (ret > 0) {
if (strcmp(rr_name, dname) == 0) {
dprintf("Found (by RR name).\n");
free(rr_name);
return de;
}
free(rr_name);
rr_name = NULL;
continue; /* Rock Ridge was valid and did not match */
}
/* Fall back to ISO name */
de_name_len = de->name_len;
de_name = de->name;
if (iso_compare_name(de_name, de_name_len, dname)) {
dprintf("Found (by ISO name).\n");
return de;
}
}
}
