Symbol: FR_DONTDELETE
usr.bin/vi/common/exf.c
316
F_SET(frp, FR_DONTDELETE);
usr.bin/vi/common/exf.c
321
F_CLR(frp, FR_DONTDELETE);
usr.bin/vi/common/exf.c
661
if (!F_ISSET(frp, FR_DONTDELETE) && frp->tname != NULL) {