ref: 3fbd9f07c8ce1a8fe1910d2edf71cda3dcf5703e dir: /sys/lib/dist.old/pc/sub/sleep/
#!/bin/rc if(! ~ $#* 1) { echo 'usage: sleep n' >[1=2] exit usage } syscall sleep $1^000 >/dev/null >[2]/dev/null