28 local raw_mkdir;

    28 

    29 local fallocate;

    29 local raw_mkdir = lfs.mkdir;

    30 

    30 local function fallocate(f, offset, len)

    31 if prosody.platform == "posix" then

    31 	-- This assumes that current position == offset

    32 	raw_mkdir = require "util.pposix".mkdir; -- Doesn't trample on umask

    32 	local fake_data = (" "):rep(len);

    33 	fallocate = require "util.pposix".fallocate;

    33 	local ok, msg = f:write(fake_data);

    34 else

    34 	if not ok then

    35 	raw_mkdir = lfs.mkdir;

    35 		return ok, msg;

    36 end

    36 	end

    37 

    37 	f:seek("set", offset);

    38 if not fallocate then -- Fallback

    38 	return true;

    39 	function fallocate(f, offset, len)

    39 end;

    40 		-- This assumes that current position == offset

    40 pcall(function()

    41 		local fake_data = (" "):rep(len);

    41 	local pposix = require "util.pposix";

    42 		local ok, msg = f:write(fake_data);

    42 	raw_mkdir = pposix.mkdir or raw_mkdir; -- Doesn't trample on umask

    43 		if not ok then

    43 	fallocate = pposix.fallocate or fallocate;

    44 			return ok, msg;

    44 end);

    45 		end

    46 		f:seek("set", offset);

    47 		return true;

    48 	end

    49 end