diff options
Diffstat (limited to 'bin/rdsquashfs/rdsquashfs.c')
-rw-r--r-- | bin/rdsquashfs/rdsquashfs.c | 275 |
1 files changed, 0 insertions, 275 deletions
diff --git a/bin/rdsquashfs/rdsquashfs.c b/bin/rdsquashfs/rdsquashfs.c deleted file mode 100644 index bdcc5a0..0000000 --- a/bin/rdsquashfs/rdsquashfs.c +++ /dev/null @@ -1,275 +0,0 @@ -/* SPDX-License-Identifier: GPL-3.0-or-later */ -/* - * rdsquashfs.c - * - * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at> - */ -#include "rdsquashfs.h" - -static sqfs_tree_node_t *list_merge(sqfs_tree_node_t *lhs, - sqfs_tree_node_t *rhs) -{ - sqfs_tree_node_t *it, *head = NULL, **next_ptr = &head; - - while (lhs != NULL && rhs != NULL) { - if (strcmp((const char *)lhs->name, - (const char *)rhs->name) <= 0) { - it = lhs; - lhs = lhs->next; - } else { - it = rhs; - rhs = rhs->next; - } - - *next_ptr = it; - next_ptr = &it->next; - } - - it = (lhs != NULL ? lhs : rhs); - *next_ptr = it; - return head; -} - -static sqfs_tree_node_t *list_sort(sqfs_tree_node_t *head) -{ - sqfs_tree_node_t *it, *half, *prev; - - it = half = prev = head; - - while (it != NULL) { - prev = half; - half = half->next; - it = it->next; - - if (it != NULL) - it = it->next; - } - - if (half == NULL) - return head; - - prev->next = NULL; - - return list_merge(list_sort(head), list_sort(half)); -} - -static int tree_sort(sqfs_tree_node_t *root) -{ - sqfs_tree_node_t *it; - - if (root->children == NULL) - return 0; - - root->children = list_sort(root->children); - - /* - XXX: not only an inconvenience but a security issue: e.g. we unpack a - SquashFS image that has a symlink pointing somewhere, and then a - sub-directory or file with the same name, the unpacker can be tricked - to follow the symlink and write anything, anywhere on the filesystem. - */ - for (it = root->children; it->next != NULL; it = it->next) { - if (strcmp((const char *)it->name, - (const char *)it->next->name) == 0) { - char *path; - int ret; - - ret = sqfs_tree_node_get_path(it, &path); - - if (ret == 0) { - fprintf(stderr, - "Entry '%s' found more than once!\n", - path); - } else { - fputs("Entry found more than once!\n", stderr); - } - - sqfs_free(path); - return -1; - } - } - - for (it = root->children; it != NULL; it = it->next) { - if (tree_sort(it)) - return -1; - } - - return 0; -} - -int main(int argc, char **argv) -{ - sqfs_xattr_reader_t *xattr = NULL; - sqfs_data_reader_t *data = NULL; - sqfs_dir_reader_t *dirrd = NULL; - sqfs_compressor_t *cmp = NULL; - sqfs_id_table_t *idtbl = NULL; - sqfs_compressor_config_t cfg; - sqfs_tree_node_t *n = NULL; - int status = EXIT_FAILURE; - sqfs_file_t *file = NULL; - sqfs_super_t super; - options_t opt; - int ret; - - process_command_line(&opt, argc, argv); - - file = sqfs_open_file(opt.image_name, SQFS_FILE_OPEN_READ_ONLY); - if (file == NULL) { - perror(opt.image_name); - goto out; - } - - ret = sqfs_super_read(&super, file); - if (ret) { - sqfs_perror(opt.image_name, "reading super block", ret); - goto out; - } - - sqfs_compressor_config_init(&cfg, super.compression_id, - super.block_size, - SQFS_COMP_FLAG_UNCOMPRESS); - - ret = sqfs_compressor_create(&cfg, &cmp); - -#ifdef WITH_LZO - if (super.compression_id == SQFS_COMP_LZO && ret != 0) - ret = lzo_compressor_create(&cfg, &cmp); -#endif - - if (ret != 0) { - sqfs_perror(opt.image_name, "creating compressor", ret); - goto out; - } - - if (!(super.flags & SQFS_FLAG_NO_XATTRS)) { - xattr = sqfs_xattr_reader_create(0); - if (xattr == NULL) { - sqfs_perror(opt.image_name, "creating xattr reader", - SQFS_ERROR_ALLOC); - goto out; - } - - ret = sqfs_xattr_reader_load(xattr, &super, file, cmp); - if (ret) { - sqfs_perror(opt.image_name, "loading xattr table", - ret); - goto out; - } - } - - idtbl = sqfs_id_table_create(0); - if (idtbl == NULL) { - sqfs_perror(opt.image_name, "creating ID table", - SQFS_ERROR_ALLOC); - goto out; - } - - ret = sqfs_id_table_read(idtbl, file, &super, cmp); - if (ret) { - sqfs_perror(opt.image_name, "loading ID table", ret); - goto out; - } - - dirrd = sqfs_dir_reader_create(&super, cmp, file, 0); - if (dirrd == NULL) { - sqfs_perror(opt.image_name, "creating dir reader", - SQFS_ERROR_ALLOC); - goto out; - } - - data = sqfs_data_reader_create(file, super.block_size, cmp, 0); - if (data == NULL) { - sqfs_perror(opt.image_name, "creating data reader", - SQFS_ERROR_ALLOC); - goto out; - } - - ret = sqfs_data_reader_load_fragment_table(data, &super); - if (ret) { - sqfs_perror(opt.image_name, "loading fragment table", ret); - goto out; - } - - ret = sqfs_dir_reader_get_full_hierarchy(dirrd, idtbl, opt.cmdpath, - opt.rdtree_flags, &n); - if (ret) { - sqfs_perror(opt.image_name, "reading filesystem tree", ret); - goto out; - } - - switch (opt.op) { - case OP_LS: - list_files(n); - break; - case OP_STAT: - if (stat_file(n)) - goto out; - break; - case OP_CAT: { - ostream_t *fp; - - if (!S_ISREG(n->inode->base.mode)) { - fprintf(stderr, "/%s: not a regular file\n", - opt.cmdpath); - goto out; - } - - fp = ostream_open_stdout(); - if (fp == NULL) - goto out; - - ret = sqfs_data_reader_dump(opt.cmdpath, data, n->inode, - fp, super.block_size); - sqfs_drop(fp); - if (ret) - goto out; - break; - } - case OP_UNPACK: - if (tree_sort(n)) - goto out; - - if (opt.unpack_root != NULL) { - if (mkdir_p(opt.unpack_root)) - goto out; - - if (chdir(opt.unpack_root)) { - perror(opt.unpack_root); - goto out; - } - } - - if (restore_fstree(n, opt.flags)) - goto out; - - if (fill_unpacked_files(super.block_size, n, data, opt.flags)) - goto out; - - if (update_tree_attribs(xattr, n, opt.flags)) - goto out; - break; - case OP_DESCRIBE: - if (describe_tree(n, opt.unpack_root)) - goto out; - break; - case OP_RDATTR: - if (dump_xattrs(xattr, n->inode)) - goto out; - break; - default: - break; - } - - status = EXIT_SUCCESS; -out: - sqfs_dir_tree_destroy(n); - sqfs_drop(data); - sqfs_drop(dirrd); - sqfs_drop(idtbl); - sqfs_drop(xattr); - sqfs_drop(cmp); - sqfs_drop(file); - free(opt.cmdpath); - return status; -} |