modules/rpc: Check for existence of external libraries

libs/sys: Small fix for API-Documentation

libs/sys/luasrc/sys.lua

@@ -207,6 +207,8 @@ end
 group = {}
 
 --- Returns information about a POSIX user group.
+-- @class function
+-- @name		getgroup
 -- @param group Group ID or name of a system user group
 -- @return	Table with information about the requested group
 group.getgroup = posix.getgroup

modules/rpc/luasrc/controller/rpc.lua

@@ -33,21 +33,25 @@ function index()
 		luci.http.status(403, "Forbidden")
 	end
 	
-	uci = entry({"rpc", "uci"}, call("rpc_uci"))
-	uci.sysauth = "root"
-	uci.sysauth_authenticator = authenticator
+	if pcall(require, "luci.model.uci") then
+		uci = entry({"rpc", "uci"}, call("rpc_uci"))
+		uci.sysauth = "root"
+		uci.sysauth_authenticator = authenticator
+	end
 	
 	fs = entry({"rpc", "fs"}, call("rpc_fs"))
 	fs.sysauth = "root"
 	fs.sysauth_authenticator = authenticator
 
-	fs = entry({"rpc", "sys"}, call("rpc_sys"))
-	fs.sysauth = "root"
-	fs.sysauth_authenticator = authenticator
+	sys = entry({"rpc", "sys"}, call("rpc_sys"))
+	sys.sysauth = "root"
+	sys.sysauth_authenticator = authenticator
 	
-	fs = entry({"rpc", "ipkg"}, call("rpc_ipkg"))
-	fs.sysauth = "root"
-	fs.sysauth_authenticator = authenticator
+	if pcall(require, "luci.model.ipkg") then
+		fs = entry({"rpc", "ipkg"}, call("rpc_ipkg"))
+		fs.sysauth = "root"
+		fs.sysauth_authenticator = authenticator
+	end
 	
 	uci = entry({"rpc", "auth"}, call("rpc_auth"))
 end