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-rw-r--r--erts/preloaded/src/prim_file.erl6
1 files changed, 5 insertions, 1 deletions
diff --git a/erts/preloaded/src/prim_file.erl b/erts/preloaded/src/prim_file.erl
index 43e6f6cd88..53c741e66e 100644
--- a/erts/preloaded/src/prim_file.erl
+++ b/erts/preloaded/src/prim_file.erl
@@ -25,7 +25,7 @@
%%% Interface towards a single file's contents. Uses ?FD_DRV.
%% Generic file contents operations
--export([open/2, close/1, sync/1, position/2, truncate/1,
+-export([open/2, close/1, datasync/1, sync/1, position/2, truncate/1,
write/2, pwrite/2, pwrite/3, read/2, read_line/1, pread/2, pread/3, copy/3]).
%% Specialized file operations
@@ -96,6 +96,7 @@
-define(FILE_IPREAD, 27).
-define(FILE_ALTNAME, 28).
-define(FILE_READ_LINE, 29).
+-define(FILE_FDATASYNC, 30).
%% Driver responses
-define(FILE_RESP_OK, 0).
@@ -292,6 +293,9 @@ pwrite(#file_descriptor{module = ?MODULE}, _, _) ->
{error, badarg}.
+%% Returns {error, Reason} | ok.
+datasync(#file_descriptor{module = ?MODULE, data = {Port, _}}) ->
+ drv_command(Port, [?FILE_FDATASYNC]).
%% Returns {error, Reason} | ok.
sync(#file_descriptor{module = ?MODULE, data = {Port, _}}) ->