diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/fs.c | 2 | ||||
| -rw-r--r-- | fs/squashfs/sqfs.c | 38 |
2 files changed, 39 insertions, 1 deletions
@@ -296,7 +296,7 @@ static struct fstype_info fstypes[] = { .size = sqfs_size, .close = sqfs_close, .closedir = sqfs_closedir, - .exists = fs_exists_unsupported, + .exists = sqfs_exists, .uuid = fs_uuid_unsupported, .write = fs_write_unsupported, .ln = fs_ln_unsupported, diff --git a/fs/squashfs/sqfs.c b/fs/squashfs/sqfs.c index 80a85e76e8..608a2bb454 100644 --- a/fs/squashfs/sqfs.c +++ b/fs/squashfs/sqfs.c @@ -1649,6 +1649,44 @@ free_strings: return ret; } +int sqfs_exists(const char *filename) +{ + struct fs_dir_stream *dirsp = NULL; + struct squashfs_dir_stream *dirs; + char *dir, *file; + struct fs_dirent *dent; + int ret; + + sqfs_split_path(&file, &dir, filename); + /* + * sqfs_opendir will uncompress inode and directory tables, and will + * return a pointer to the directory that contains the requested file. + */ + ret = sqfs_opendir(dir, &dirsp); + if (ret) { + ret = -EINVAL; + goto free_strings; + } + + dirs = (struct squashfs_dir_stream *)dirsp; + + while (!sqfs_readdir(dirsp, &dent)) { + ret = strcmp(dent->name, file); + if (!ret) + break; + free(dirs->entry); + dirs->entry = NULL; + } + + sqfs_closedir(dirsp); + +free_strings: + free(dir); + free(file); + + return ret == 0; +} + void sqfs_close(void) { free(ctxt.sblk); |