From 544f8f6dfd2f61fd1d2ab7a9a955e63d4b416dcc Mon Sep 17 00:00:00 2001
From: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Date: Tue, 17 Sep 2019 13:21:05 +0200
Subject: Remove sqfs reader from rdsquashfs

Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
---
 unpack/rdsquashfs.c | 88 +++++++++++++++++++++++++++++++++++++++++------------
 1 file changed, 69 insertions(+), 19 deletions(-)

(limited to 'unpack')

diff --git a/unpack/rdsquashfs.c b/unpack/rdsquashfs.c
index 4fb3a78..e0cfaba 100644
--- a/unpack/rdsquashfs.c
+++ b/unpack/rdsquashfs.c
@@ -23,24 +23,69 @@ static void dump_xattrs(fstree_t *fs, tree_xattr_t *xattr)
 
 int main(int argc, char **argv)
 {
+	sqfs_compressor_config_t cfg;
 	int status = EXIT_FAILURE;
-	sqfs_reader_t sqfs;
+	sqfs_compressor_t *cmp;
+	data_reader_t *data;
+	sqfs_super_t super;
+	sqfs_file_t *file;
 	tree_node_t *n;
 	options_t opt;
+	fstree_t fs;
 
 	process_command_line(&opt, argc, argv);
 
-	if (sqfs_reader_open(&sqfs, opt.image_name, opt.rdtree_flags))
+	file = sqfs_open_file(opt.image_name, SQFS_FILE_OPEN_READ_ONLY);
+	if (file == NULL) {
+		perror(opt.image_name);
 		goto out_cmd;
+	}
+
+	if (sqfs_super_read(&super, file)) {
+		fprintf(stderr, "%s: error reading super block.\n",
+			opt.image_name);
+		goto out_file;
+	}
+
+	if (!sqfs_compressor_exists(super.compression_id)) {
+		fprintf(stderr, "%s: unknown compressor used.\n",
+			opt.image_name);
+		goto out_file;
+	}
+
+	sqfs_compressor_config_init(&cfg, super.compression_id,
+				    super.block_size,
+				    SQFS_COMP_FLAG_UNCOMPRESS);
+
+	cmp = sqfs_compressor_create(&cfg);
+	if (cmp == NULL)
+		goto out_file;
+
+	if (super.flags & SQFS_FLAG_COMPRESSOR_OPTIONS) {
+		if (cmp->read_options(cmp, file))
+			goto out_cmp;
+	}
+
+	if (super.flags & SQFS_FLAG_NO_XATTRS)
+		opt.rdtree_flags &= ~RDTREE_READ_XATTR;
+
+	if (deserialize_fstree(&fs, &super, cmp, file, opt.rdtree_flags))
+		goto out_cmp;
+
+	fstree_gen_file_list(&fs);
+
+	data = data_reader_create(file, &super, cmp);
+	if (data == NULL)
+		goto out_fs;
 
 	if (opt.cmdpath != NULL) {
-		n = fstree_node_from_path(&sqfs.fs, opt.cmdpath);
+		n = fstree_node_from_path(&fs, opt.cmdpath);
 		if (n == NULL) {
 			perror(opt.cmdpath);
-			goto out_fs;
+			goto out;
 		}
 	} else {
-		n = sqfs.fs.root;
+		n = fs.root;
 	}
 
 	switch (opt.op) {
@@ -51,12 +96,12 @@ int main(int argc, char **argv)
 		if (!S_ISREG(n->mode)) {
 			fprintf(stderr, "/%s: not a regular file\n",
 				opt.cmdpath);
-			goto out_fs;
+			goto out;
 		}
 
-		if (data_reader_dump_file(sqfs.data, n->data.file,
+		if (data_reader_dump_file(data, n->data.file,
 					  STDOUT_FILENO, false))
-			goto out_fs;
+			goto out;
 		break;
 	case OP_UNPACK:
 		if (opt.unpack_root != NULL) {
@@ -68,31 +113,36 @@ int main(int argc, char **argv)
 		}
 
 		if (restore_fstree(n, opt.flags))
-			goto out_fs;
+			goto out;
 
-		if (fill_unpacked_files(&sqfs.fs, sqfs.data,
-					opt.flags, opt.num_jobs))
-			goto out_fs;
+		if (fill_unpacked_files(&fs, data, opt.flags, opt.num_jobs))
+			goto out;
 
-		if (update_tree_attribs(&sqfs.fs, n, opt.flags))
-			goto out_fs;
+		if (update_tree_attribs(&fs, n, opt.flags))
+			goto out;
 
 		if (opt.unpack_root != NULL && popd() != 0)
-			goto out_fs;
+			goto out;
 		break;
 	case OP_DESCRIBE:
-		if (describe_tree(sqfs.fs.root, opt.unpack_root))
-			goto out_fs;
+		if (describe_tree(fs.root, opt.unpack_root))
+			goto out;
 		break;
 	case OP_RDATTR:
 		if (n->xattr != NULL)
-			dump_xattrs(&sqfs.fs, n->xattr);
+			dump_xattrs(&fs, n->xattr);
 		break;
 	}
 
 	status = EXIT_SUCCESS;
+out:
+	data_reader_destroy(data);
 out_fs:
-	sqfs_reader_close(&sqfs);
+	fstree_cleanup(&fs);
+out_cmp:
+	cmp->destroy(cmp);
+out_file:
+	file->destroy(file);
 out_cmd:
 	free(opt.cmdpath);
 	return status;
-- 
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