From 950442da625b22e5e033f4955f61a2a4efbd487f Mon Sep 17 00:00:00 2001
From: Magnus Ahltorp <map@kth.se>
Date: Tue, 7 Apr 2015 22:15:22 +0200
Subject: perm:ensurefile now only does fsync only when sync flag is set Closes
 CATLFISH-35

---
 src/perm.erl | 57 ++++++++++++++++++++++++++++++---------------------------
 1 file changed, 30 insertions(+), 27 deletions(-)

(limited to 'src/perm.erl')

diff --git a/src/perm.erl b/src/perm.erl
index 0cbe6cb..725cfb7 100644
--- a/src/perm.erl
+++ b/src/perm.erl
@@ -58,34 +58,37 @@ ensurefile_nosync(Rootdir, Key, Content) ->
 ensurefile(Rootdir, Key, Content, Syncflag) ->
     lager:debug("dir ~p key ~s", [Rootdir, mochihex:to_hex(Key)]),
     {Dirs, Path} = path_for_key(Rootdir, Key),
-    case readfile_and_verify(Path, Content) of
-	ok ->
-            lager:debug("key ~s existed, fsync", [mochihex:to_hex(Key)]),
-	    ok = util:fsync([Path, Rootdir | Dirs]),
+    Result =
+        case readfile_and_verify(Path, Content) of
+            ok ->
+                lager:debug("key ~s existed, fsync", [mochihex:to_hex(Key)]),
+                ok = util:fsync([Path, Rootdir | Dirs]),
+                lager:debug("key ~s fsynced", [mochihex:to_hex(Key)]),
+                ok;
+            differ ->
+                lager:debug("key ~s existed, was different",
+                            [mochihex:to_hex(Key)]),
+                differ;
+            {error, enoent} ->
+                lager:debug("key ~s didn't exist, add", [mochihex:to_hex(Key)]),
+                util:check_error(make_dirs([Rootdir, Rootdir ++ "nursery/"]
+                                           ++ Dirs),
+                                 makedir, "Error creating directory"),
+                NurseryName = Rootdir ++ "nursery/" ++
+                    util:tempfilename(hex:bin_to_hexstr(Key)),
+                util:write_tempfile_and_rename(Path, NurseryName, Content),
+                ok;
+            {error, Error} ->
+                util:exit_with_error(Error, readfile, "Error reading file")
+        end,
+    case Syncflag of
+        sync ->
+            lager:debug("key ~s added, fsync", [mochihex:to_hex(Key)]),
+            ok = util:fsync([Path, Rootdir | Dirs]),
             lager:debug("key ~s fsynced", [mochihex:to_hex(Key)]),
-            ok;
-        differ ->
-            lager:debug("key ~s existed, was different", [mochihex:to_hex(Key)]),
-            differ;
-	{error, enoent} ->
-            lager:debug("key ~s didn't exist, add", [mochihex:to_hex(Key)]),
-            util:check_error(make_dirs([Rootdir, Rootdir ++ "nursery/"]
-                                       ++ Dirs),
-                             makedir, "Error creating directory"),
-            NurseryName = Rootdir ++ "nursery/" ++
-                util:tempfilename(hex:bin_to_hexstr(Key)),
-            util:write_tempfile_and_rename(Path, NurseryName, Content),
-            case Syncflag of
-                sync ->
-                    lager:debug("key ~s added, fsync", [mochihex:to_hex(Key)]),
-                    ok = util:fsync([Path, Rootdir | Dirs]),
-                    lager:debug("key ~s fsynced", [mochihex:to_hex(Key)]),
-                    ok;
-                nosync ->
-                    ok
-            end;
-	{error, Error} ->
-            util:exit_with_error(Error, readfile, "Error reading file")
+            Result;
+        nosync ->
+            Result
     end.
 
 -spec readfile(string(), binary()) -> binary() | noentry.
-- 
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