3 files changed, 48 insertions, 1 deletions
diff --git a/libs/nixio/lua/nixio/util.lua b/libs/nixio/lua/nixio/util.lua
index 34800b454..cb9fcf56f 100644
--- a/libs/nixio/lua/nixio/util.lua
+++ b/libs/nixio/lua/nixio/util.lua
@@ -77,11 +77,12 @@ function socket.linesource(self, limit)
 		if flush then
 			line = buffer:sub(bpos + 1)
 			buffer = ""
+			bpos = 0
 			return line
 		end
 
 		while not line do
-			_, endp, line = buffer:find("^(.-)\r?\n", bpos + 1)
+			_, endp, line = buffer:find("(.-)\r?\n", bpos + 1)
 			if line then
 				bpos = endp
 				return line
@@ -89,6 +90,8 @@ function socket.linesource(self, limit)
 				local newblock, code = self:recv(limit + bpos - #buffer)
 				if not newblock then
 					return nil, code
+				elseif #newblock == 0 then
+					return nil
 				end
 				buffer = buffer:sub(bpos + 1) .. newblock
 				bpos = 0
@@ -97,4 +100,32 @@ function socket.linesource(self, limit)
 			end
 		end
 	end
+end
+
+function socket.blocksource(self, bs, limit)
+	bs = bs or BUFFERSIZE
+	return function()
+		local toread = bs
+		if limit then
+			if limit < 1 then
+				return nil
+			elseif limit < toread then
+				toread = limit
+			end
+		end
+
+		local block, code, msg = self:recv(toread)
+
+		if not block then
+			return nil, code
+		elseif #block == 0 then
+			return nil
+		else
+			if limit then
+				limit = limit - #block
+			end
+
+			return block
+		end
+	end
 end
 \ No newline at end of file
diff --git a/libs/nixio/src/nixio.c b/libs/nixio/src/nixio.c
index 5f098be31..a4ef7462e 100644
--- a/libs/nixio/src/nixio.c
+++ b/libs/nixio/src/nixio.c
@@ -123,6 +123,18 @@ LUALIB_API int luaopen_nixio(lua_State *L) {
 	lua_pushnumber(L, VERSION);
 	lua_setfield(L, -2, "version");
 
+	/* some constants */
+	lua_createtable(L, 0, 1);
+
+	NIXIO_PUSH_CONSTANT(EACCES);
+	NIXIO_PUSH_CONSTANT(ENOSYS);
+	NIXIO_PUSH_CONSTANT(EINVAL);
+	NIXIO_PUSH_CONSTANT(EWOULDBLOCK);
+	NIXIO_PUSH_CONSTANT(EAGAIN);
+	NIXIO_PUSH_CONSTANT(ENOMEM);
+
+	lua_setfield(L, -2, "const");
+
 	/* remove meta table */
 	lua_remove(L, -2);
 
diff --git a/libs/nixio/src/nixio.h b/libs/nixio/src/nixio.h
index e4bb6d6de..cdb43599e 100644
--- a/libs/nixio/src/nixio.h
+++ b/libs/nixio/src/nixio.h
@@ -6,6 +6,10 @@
 #define NIXIO_BUFFERSIZE 8096
 #define _FILE_OFFSET_BITS 64
 
+#define NIXIO_PUSH_CONSTANT(x) \
+	lua_pushinteger(L, x); \
+	lua_setfield(L, -2, #x);
+
 /* uClibc: broken as always */
 #define _LARGEFILE_SOURCE