API BERR Mapt Nvi Perl SCR SYSERR Tcl VINFO aline callback chp cmd cmds dline enum escreen excmd freeline getbuf getcursor getline getmotion gline iline int interp iscreen lenp linep lline lno lnop lp mapt maptype movetype msgq msgtype nvi recno setcursor sline strerror textp vicmd