diff options
| author | David Barksdale <amatus.amongus@gmail.com> | 2012-06-08 22:54:29 -0500 |
|---|---|---|
| committer | David Barksdale <amatus.amongus@gmail.com> | 2012-06-08 22:54:29 -0500 |
| commit | 6dc5fa531db1a9e65a36c9260d6d1a7cad20f1be (patch) | |
| tree | d2e8fbe1dc2bcca344b770464ab8b153b42889f8 /src | |
| parent | fd689b625890fd4a2660a6aafcfbf6e5d36dfd29 (diff) | |
Implemented MemoryBackend.rename.
Diffstat (limited to 'src')
| -rw-r--r-- | src/clojure/foofs/memorybackend.clj | 46 |
1 files changed, 45 insertions, 1 deletions
diff --git a/src/clojure/foofs/memorybackend.clj b/src/clojure/foofs/memorybackend.clj index 3cbaddd..759c782 100644 --- a/src/clojure/foofs/memorybackend.clj +++ b/src/clojure/foofs/memorybackend.clj @@ -278,4 +278,48 @@ #(assoc % :mtime seconds :mtimensec nseconds) continuation!)) (rename [_ nodeid target-nodeid filename target-filename continuation!] - (continuation! errno-nosys))) + (send + state-agent + (fn [state] + (let [inode-table (:inode-table state) + lookup-table (:lookup-table state) + dir-inode (get inode-table nodeid) + target-dir-inode (get inode-table target-nodeid) + children (get lookup-table nodeid) + file-nodeid (get children filename) + file-inode (get inode-table file-nodeid)] + (cond + (not (= stat-type-directory + (bit-and stat-type-mask (:mode dir-inode)))) + (do (continuation! errno-notdir) state) + (not (= stat-type-directory + (bit-and stat-type-mask (:mode target-dir-inode)))) + (do (continuation! errno-notdir) state) + (nil? file-inode) + (do (continuation! errno-noent) state) + true + (let [lookup-table (assoc lookup-table nodeid + (dissoc children filename)) + lookup-table (assoc-in lookup-table [target-nodeid + target-filename] + file-nodeid) + ;; If we are renaming a directory fixup ".." link + file-isdir (= stat-type-directory + (bit-and stat-type-mask (:mode file-inode))) + lookup-table (if file-isdir + (assoc-in lookup-table [file-nodeid + ".."] + target-nodeid) + lookup-table) + inode-table (if file-isdir + (assoc-in inode-table [nodeid :nlink] + (dec (:nlink dir-inode))) + inode-table) + inode-table (if file-isdir + (assoc-in inode-table [target-nodeid :nlink] + (inc (:nlink target-dir-inode))) + inode-table) + state (assoc state :inode-table inode-table + :lookup-table lookup-table)] + (agent-do state-agent (continuation! nil)) + state))))))) |