FD_CLR           5438 src/process.c  	    FD_CLR (fd, &Atemp);
FD_CLR           5597 src/process.c  		      FD_CLR (channel, &Available);
FD_CLR             70 src/sysselect.h   FD_CLR (fd, set);
FD_CLR            234 src/xgselect.c             FD_CLR (i, rfds);
FD_CLR            242 src/xgselect.c             FD_CLR (i, wfds);