diff options
Diffstat (limited to 'bin/rdsquashfs/rdsquashfs.c')
| -rw-r--r-- | bin/rdsquashfs/rdsquashfs.c | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/bin/rdsquashfs/rdsquashfs.c b/bin/rdsquashfs/rdsquashfs.c new file mode 100644 index 0000000..fa2bbb4 --- /dev/null +++ b/bin/rdsquashfs/rdsquashfs.c @@ -0,0 +1,175 @@ +/* SPDX-License-Identifier: GPL-3.0-or-later */ +/* + * rdsquashfs.c + * + * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at> + */ +#include "rdsquashfs.h" + +int main(int argc, char **argv) +{ + sqfs_xattr_reader_t *xattr = NULL; + sqfs_compressor_config_t cfg; + int status = EXIT_FAILURE; + sqfs_data_reader_t *data; + sqfs_dir_reader_t *dirrd; + sqfs_compressor_t *cmp; + sqfs_id_table_t *idtbl; + sqfs_tree_node_t *n; + sqfs_super_t super; + sqfs_file_t *file; + 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_cmd; + } + + ret = sqfs_super_read(&super, file); + if (ret) { + sqfs_perror(opt.image_name, "reading super block", ret); + goto out_file; + } + + 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_file; + } + + 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_cmp; + } + + ret = sqfs_xattr_reader_load(xattr, &super, file, cmp); + if (ret) { + sqfs_perror(opt.image_name, "loading xattr table", + ret); + goto out_xr; + } + } + + idtbl = sqfs_id_table_create(0); + if (idtbl == NULL) { + sqfs_perror(opt.image_name, "creating ID table", + SQFS_ERROR_ALLOC); + goto out_xr; + } + + ret = sqfs_id_table_read(idtbl, file, &super, cmp); + if (ret) { + sqfs_perror(opt.image_name, "loading ID table", ret); + goto out_id; + } + + dirrd = sqfs_dir_reader_create(&super, cmp, file); + if (dirrd == NULL) { + sqfs_perror(opt.image_name, "creating dir reader", + SQFS_ERROR_ALLOC); + goto out_id; + } + + data = sqfs_data_reader_create(file, super.block_size, cmp); + if (data == NULL) { + sqfs_perror(opt.image_name, "creating data reader", + SQFS_ERROR_ALLOC); + goto out_dr; + } + + ret = sqfs_data_reader_load_fragment_table(data, &super); + if (ret) { + sqfs_perror(opt.image_name, "loading fragment table", ret); + goto out_data; + } + + 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_data; + } + + switch (opt.op) { + case OP_LS: + list_files(n); + break; + case OP_CAT: + if (!S_ISREG(n->inode->base.mode)) { + fprintf(stderr, "/%s: not a regular file\n", + opt.cmdpath); + goto out; + } + + if (sqfs_data_reader_dump(opt.cmdpath, data, n->inode, + stdout, super.block_size, false)) { + goto out; + } + break; + case OP_UNPACK: + 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; + } + + status = EXIT_SUCCESS; +out: + sqfs_dir_tree_destroy(n); +out_data: + sqfs_destroy(data); +out_dr: + sqfs_destroy(dirrd); +out_id: + sqfs_destroy(idtbl); +out_xr: + if (xattr != NULL) + sqfs_destroy(xattr); +out_cmp: + sqfs_destroy(cmp); +out_file: + sqfs_destroy(file); +out_cmd: + free(opt.cmdpath); + return status; +} |