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authorDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2019-06-10 23:16:34 +0200
committerDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2019-06-10 23:16:53 +0200
commit576e195ba5476ebf428bac51365d829d713e6907 (patch)
tree1dc5a487ae278cfd9287dbd233a7975489612ffc /unpack/read_fstree.c
parent4d2e87b767d1e025699286783c23926ec5eff857 (diff)
cleanup: move tree deserialization to libsqfs.a
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Diffstat (limited to 'unpack/read_fstree.c')
-rw-r--r--unpack/read_fstree.c184
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;
-}