ref: 97d3ff1bee2a737ce334ecf1ac962bb74de9df75
dir: /sys/src/9/port/bootfs.proto/
$cputype bin 9660srv awk aux kbdfs bind bzfs cat cryptsetup dd disk fdisk kfs prep dossrv echo cwfs64x grep gunzip hoc ip ipconfig ls mkdir mount ramfs rc read rm sed seq sleep srv test unmount usb usbd xd rc lib rcmain local.rc 555 sys sys ../boot/local.rc tcp.rc 555 sys sys ../boot/tcp.rc bin fstype diskparts bootrc 555 sys sys ../boot/bootrc tmp