Plan 9 from Bell Labs’s /usr/web/sources/patch/sorry/doc-man-4-usb-usbstart-usbprinter/usbprinter
#!/bin/rc if (! test -e /dev/usb) bind -b '#U' /dev for(i in /dev/usb?/[0-9]*){ if (grep -s 'Enabled 0x020107' $i/status){ echo -n 'ep 2 bulk w 64 32' >$i/ctl bind $i/ep2data /n/lp exit '' } } exit 'no printer'