19 years ago rsc
do not free r until done with it!
hide some routines
minor fixes; hide some routines
no need for disk or scsi
fix error message
cache answer
add execl and rand
guarantee that EINTR is "interrupted".
use fcntl F_SETLK instead of flock, for sun's.
exception names
unused variables
use 9pclient
parse -s option
do threading right