diff options
Diffstat (limited to 'unpack/read_fstree.c')
| -rw-r--r-- | unpack/read_fstree.c | 184 |
1 files changed, 0 insertions, 184 deletions
diff --git a/unpack/read_fstree.c b/unpack/read_fstree.c deleted file mode 100644 index 544af83..0000000 --- a/unpack/read_fstree.c +++ /dev/null @@ -1,184 +0,0 @@ -/* SPDX-License-Identifier: GPL-3.0-or-later */ -#include "rdsquashfs.h" - - -static int should_skip(int type, int flags) -{ - switch (type) { - case SQFS_INODE_BDEV: - case SQFS_INODE_CDEV: - case SQFS_INODE_EXT_CDEV: - case SQFS_INODE_EXT_BDEV: - return (flags & UNPACK_NO_DEVICES); - case SQFS_INODE_SLINK: - case SQFS_INODE_EXT_SLINK: - return (flags & UNPACK_NO_SLINKS); - case SQFS_INODE_SOCKET: - case SQFS_INODE_EXT_SOCKET: - return(flags & UNPACK_NO_SOCKETS); - case SQFS_INODE_FIFO: - case SQFS_INODE_EXT_FIFO: - return (flags & UNPACK_NO_FIFO); - } - return 0; -} - -static int fill_dir(meta_reader_t *ir, meta_reader_t *dr, tree_node_t *root, - sqfs_super_t *super, id_table_t *idtbl, 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; - - block_start = root->data.dir->start_block; - block_start += super->directory_table_start; - - if (meta_reader_seek(dr, block_start, root->data.dir->block_offset)) - return -1; - - size = root->data.dir->size; - - while (size != 0) { - if (meta_reader_read_dir_header(dr, &hdr)) - return -1; - - size -= sizeof(hdr) > size ? size : sizeof(hdr); - - for (i = 0; i <= hdr.count; ++i) { - ent = meta_reader_read_dir_ent(dr); - if (ent == NULL) - return -1; - - diff = sizeof(*ent) + strlen((char *)ent->name); - size -= diff > size ? size : diff; - - if (should_skip(ent->type, flags)) { - free(ent); - continue; - } - - inode = meta_reader_read_inode(ir, super, - hdr.start_block, - ent->offset); - if (inode == NULL) { - free(ent); - return -1; - } - - n = tree_node_from_inode(inode, idtbl, - (char *)ent->name, - super->block_size); - free(ent); - free(inode); - - if (n == NULL) - return -1; - - n->parent = root; - n->next = root->data.dir->children; - root->data.dir->children = n; - } - } - - n = root->data.dir->children; - prev = NULL; - - while (n != NULL) { - if (S_ISDIR(n->mode)) { - if (fill_dir(ir, dr, n, super, idtbl, flags)) - return -1; - - if (n->data.dir->children == NULL && - (flags & UNPACK_NO_EMPTY)) { - if (prev == NULL) { - root->data.dir->children = n->next; - free(n); - n = root->data.dir->children; - } else { - prev->next = n->next; - free(n); - n = prev->next; - } - continue; - } - } - - prev = n; - n = n->next; - } - - return 0; -} - -int read_fstree(fstree_t *out, sqfs_super_t *super, unsqfs_info_t *info) -{ - sqfs_inode_generic_t *root; - meta_reader_t *ir, *dr; - uint64_t block_start; - id_table_t idtbl; - int status = -1; - size_t offset; - - ir = meta_reader_create(info->sqfsfd, info->cmp); - if (ir == NULL) - return -1; - - dr = meta_reader_create(info->sqfsfd, info->cmp); - if (dr == NULL) - goto out_ir; - - if (id_table_init(&idtbl)) - goto out_dr; - - if (id_table_read(&idtbl, info->sqfsfd, super, info->cmp)) - goto out_id; - - block_start = super->root_inode_ref >> 16; - offset = super->root_inode_ref & 0xFFFF; - root = meta_reader_read_inode(ir, super, block_start, offset); - if (root == NULL) - goto out_id; - - if (root->base.type != SQFS_INODE_DIR && - root->base.type != SQFS_INODE_EXT_DIR) { - free(root); - fputs("File system root inode is not a directory inode!\n", - stderr); - goto out_id; - } - - memset(out, 0, sizeof(*out)); - out->block_size = super->block_size; - out->default_uid = 0; - out->default_gid = 0; - out->default_mode = 0755; - out->default_mtime = super->modification_time; - - out->root = tree_node_from_inode(root, &idtbl, "", super->block_size); - free(root); - root = NULL; - - if (out->root == NULL) - goto out_id; - - if (fill_dir(ir, dr, out->root, super, &idtbl, info->flags)) - goto fail_fs; - - fstree_sort(out); - - status = 0; -out_id: - id_table_cleanup(&idtbl); -out_dr: - meta_reader_destroy(dr); -out_ir: - meta_reader_destroy(ir); - return status; -fail_fs: - fstree_cleanup(out); - goto out_id; -} |