This efun is only available if OLD_ED is not defined.
string ed_start(string file, int flag);
string ed_start(string file);
string ed_start();
If 'flag' is nonzero, ed is started in restricted mode. See the documentation for the old efun for information. 'file' is the name of the file to open; if none is given then no file becomes active.
ed_start() may not be called when another ed session for the current object is already active. Any messages generated while starting up ed are returned by this efun.
See also: ed , ed_cmd , query_ed_mode