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Diffstat (limited to 'lib/sqfshelper/deserialize_fstree.c')
-rw-r--r--lib/sqfshelper/deserialize_fstree.c165
1 files changed, 64 insertions, 101 deletions
diff --git a/lib/sqfshelper/deserialize_fstree.c b/lib/sqfshelper/deserialize_fstree.c
index ef000d4..e0f53e7 100644
--- a/lib/sqfshelper/deserialize_fstree.c
+++ b/lib/sqfshelper/deserialize_fstree.c
@@ -93,102 +93,70 @@ fail:
return false;
}
-static int fill_dir(sqfs_meta_reader_t *ir, sqfs_meta_reader_t *dr,
- tree_node_t *root, sqfs_super_t *super,
- sqfs_id_table_t *idtbl,
+static int fill_dir(sqfs_dir_reader_t *dr,
+ tree_node_t *root, sqfs_id_table_t *idtbl,
fstree_t *fs, sqfs_xattr_reader_t *xr, int flags)
{
sqfs_inode_generic_t *inode;
- sqfs_dir_header_t hdr;
sqfs_dir_entry_t *ent;
tree_node_t *n, *prev;
- uint64_t block_start;
- size_t size, diff;
- uint32_t i;
int err;
- size = root->data.dir->size;
- if (size <= sizeof(hdr))
- return 0;
-
- block_start = root->data.dir->start_block;
- block_start += super->directory_table_start;
-
- if (sqfs_meta_reader_seek(dr, block_start,
- root->data.dir->block_offset)) {
- return -1;
- }
-
- while (size > sizeof(hdr)) {
- if (sqfs_meta_reader_read_dir_header(dr, &hdr))
+ for (;;) {
+ err = sqfs_dir_reader_read(dr, &ent);
+ if (err > 0)
+ break;
+ if (err < 0)
return -1;
- size -= sizeof(hdr);
-
- for (i = 0; i <= hdr.count && size > sizeof(*ent); ++i) {
- if (sqfs_meta_reader_read_dir_ent(dr, &ent))
- return -1;
-
- diff = sizeof(*ent) + strlen((char *)ent->name);
- if (diff > size) {
- free(ent);
- break;
- }
- size -= diff;
-
- if (should_skip(ent->type, flags)) {
- free(ent);
- continue;
- }
+ if (should_skip(ent->type, flags)) {
+ free(ent);
+ continue;
+ }
- if (!is_name_sane((const char *)ent->name)) {
- free(ent);
- continue;
- }
+ if (!is_name_sane((const char *)ent->name)) {
+ free(ent);
+ continue;
+ }
- err = sqfs_meta_reader_read_inode(ir, super,
- hdr.start_block,
- ent->offset, &inode);
- if (err) {
- free(ent);
- return err;
- }
+ err = sqfs_dir_reader_get_inode(dr, &inode);
+ if (err) {
+ free(ent);
+ return err;
+ }
- n = tree_node_from_inode(inode, idtbl,
- (char *)ent->name);
+ n = tree_node_from_inode(inode, idtbl, (char *)ent->name);
+ if (n == NULL) {
+ free(ent);
+ free(inode);
+ return -1;
+ }
- if (n == NULL) {
- free(ent);
- free(inode);
- return -1;
- }
+ if (node_would_be_own_parent(root, n)) {
+ fputs("WARNING: Found a directory that "
+ "contains itself, skipping loop back "
+ "reference!\n", stderr);
+ free(n);
+ free(ent);
+ free(inode);
+ continue;
+ }
- if (node_would_be_own_parent(root, n)) {
- fputs("WARNING: Found a directory that "
- "contains itself, skipping loop back "
- "reference!\n", stderr);
+ if (flags & RDTREE_READ_XATTR) {
+ if (restore_xattr(xr, fs, n, inode)) {
free(n);
free(ent);
free(inode);
- continue;
+ return -1;
}
+ }
- if (flags & RDTREE_READ_XATTR) {
- if (restore_xattr(xr, fs, n, inode)) {
- free(n);
- free(ent);
- free(inode);
- return -1;
- }
- }
+ free(ent);
- free(ent);
- free(inode);
-
- n->parent = root;
- n->next = root->data.dir->children;
- root->data.dir->children = n;
- }
+ n->inode = inode;
+ n->parent = root;
+ n->next = root->data.dir->children;
+ root->data.dir->children = n;
}
n = root->data.dir->children;
@@ -196,11 +164,16 @@ static int fill_dir(sqfs_meta_reader_t *ir, sqfs_meta_reader_t *dr,
while (n != NULL) {
if (S_ISDIR(n->mode)) {
- if (fill_dir(ir, dr, n, super, idtbl, fs, xr, flags))
+ err = sqfs_dir_reader_open_dir(dr, n->inode);
+ if (err)
+ return -1;
+
+ if (fill_dir(dr, n, idtbl, fs, xr, flags))
return -1;
if (n->data.dir->children == NULL &&
(flags & RDTREE_NO_EMPTY)) {
+ free(n->inode);
if (prev == NULL) {
root->data.dir->children = n->next;
free(n);
@@ -214,6 +187,9 @@ static int fill_dir(sqfs_meta_reader_t *ir, sqfs_meta_reader_t *dr,
}
}
+ free(n->inode);
+ n->inode = NULL;
+
prev = n;
n = n->next;
}
@@ -224,29 +200,15 @@ static int fill_dir(sqfs_meta_reader_t *ir, sqfs_meta_reader_t *dr,
int deserialize_fstree(fstree_t *out, sqfs_super_t *super,
sqfs_compressor_t *cmp, sqfs_file_t *file, int flags)
{
- uint64_t block_start, limit;
- sqfs_meta_reader_t *ir, *dr;
sqfs_inode_generic_t *root;
sqfs_xattr_reader_t *xr;
sqfs_id_table_t *idtbl;
+ sqfs_dir_reader_t *dr;
int status = -1;
- size_t offset;
-
- ir = sqfs_meta_reader_create(file, cmp, super->inode_table_start,
- super->directory_table_start);
- if (ir == NULL)
- return -1;
-
- limit = super->id_table_start;
- if (super->export_table_start < limit)
- limit = super->export_table_start;
- if (super->fragment_table_start < limit)
- limit = super->fragment_table_start;
- dr = sqfs_meta_reader_create(file, cmp, super->directory_table_start,
- limit);
+ dr = sqfs_dir_reader_create(super, cmp, file);
if (dr == NULL)
- goto out_ir;
+ return -1;
idtbl = sqfs_id_table_create();
if (idtbl == NULL)
@@ -262,9 +224,7 @@ int deserialize_fstree(fstree_t *out, sqfs_super_t *super,
if (sqfs_xattr_reader_load_locations(xr))
goto out_xr;
- block_start = super->root_inode_ref >> 16;
- offset = super->root_inode_ref & 0xFFFF;
- if (sqfs_meta_reader_read_inode(ir, super, block_start, offset, &root))
+ if (sqfs_dir_reader_get_root_inode(dr, &root))
goto out_xr;
if (root->base.type != SQFS_INODE_DIR &&
@@ -308,9 +268,14 @@ int deserialize_fstree(fstree_t *out, sqfs_super_t *super,
}
}
+ if (sqfs_dir_reader_open_dir(dr, root)) {
+ free(root);
+ goto fail_fs;
+ }
+
free(root);
- if (fill_dir(ir, dr, out->root, super, idtbl, out, xr, flags))
+ if (fill_dir(dr, out->root, idtbl, out, xr, flags))
goto fail_fs;
tree_node_sort_recursive(out->root);
@@ -321,9 +286,7 @@ out_xr:
out_id:
sqfs_id_table_destroy(idtbl);
out_dr:
- sqfs_meta_reader_destroy(dr);
-out_ir:
- sqfs_meta_reader_destroy(ir);
+ sqfs_dir_reader_destroy(dr);
return status;
fail_fs:
fstree_cleanup(out);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-15 05:49:18 +0000