traverse_dir_ll.c

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#include <sqsh.h>
#include <stdio.h>
 
int
main(int argc, char *argv[]) {
    int error_code = 0;
    if (argc != 2) {
        printf("Usage: %s <sqsh-file>\n", argv[0]);
        return 1;
    }
    struct SqshConfig config = {
            // Read the header file to find documentation on these fields.
            // It's safe to set them all to 0.
            .source_mapper = sqsh_mapper_impl_mmap,
            .source_size = 0,
            .mapper_block_size = 0,
            .mapper_lru_size = 0,
            .metablock_lru_size = 0,
            .data_lru_size = 0,
            .archive_offset = 0,
            .max_symlink_depth = 0,
    };
    struct SqshArchive *archive =
            sqsh_archive_open(argv[1], &config, &error_code);
    if (error_code != 0) {
        sqsh_perror(error_code, "sqsh_archive_new");
        return 1;
    }
    const struct SqshSuperblock *superblock = sqsh_archive_superblock(archive);
    uint64_t inode_root_ref = sqsh_superblock_inode_root_ref(superblock);
    struct SqshFile *file =
            sqsh_open_by_ref(archive, inode_root_ref, &error_code);
    if (error_code != 0) {
        sqsh_perror(error_code, "sqsh_file_new");
        return 1;
    }
 
    struct SqshTreeTraversal *traversal =
            sqsh_tree_traversal_new(file, &error_code);
    if (error_code != 0) {
        sqsh_perror(error_code, "sqsh_directory_iterator_new");
        return 1;
    }
 
    while (sqsh_tree_traversal_next(traversal, &error_code)) {
        enum SqshTreeTraversalState state =
                sqsh_tree_traversal_state(traversal);
        if (state == SQSH_TREE_TRAVERSAL_STATE_DIRECTORY_END) {
            continue;
        }
        size_t depth = sqsh_tree_traversal_depth(traversal);
        size_t segment_size;
        const char *segment;
        for (sqsh_index_t i = 0; i < depth; i++) {
            segment = sqsh_tree_traversal_path_segment(
                    traversal, &segment_size, i);
            fputc('/', stdout);
            fwrite(segment, 1, segment_size, stdout);
        }
        fputc('\n', stdout);
    }
    if (error_code < 0) {
        sqsh_perror(error_code, "sqsh_directory_iterator_next");
        return 1;
    }
 
    sqsh_tree_traversal_free(traversal);
    sqsh_close(file);
    sqsh_archive_close(archive);
    return 0;
}