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WebSVN – planix.SVN – Blame – /os/branches/feature_unix/sys/src/cmd/usb/print/print.c – Rev 2

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/*
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 * usb/print - usb printer file server
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 * BUG: Assumes the printer will be always connected and
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 * not hot-plugged. (Otherwise should stay running and
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 * listen to errors to keep the device there as long as it has
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 * not failed). Also, this is untested and done ad-hoc to
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 * replace the print script.
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 */
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#include <u.h>
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#include <libc.h>
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#include <thread.h>
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#include "usb.h"
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enum
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{
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	Qdir = 0,
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	Qctl,
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	Qraw,
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	Qdata,
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	Qmax,
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};
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int
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findendpoints(Dev *dev, int devid)
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{
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	Ep *ep;
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	Dev *d;
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	Usbdev *ud;
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	int i, epout;
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	epout = -1;
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	ud = dev->usb;
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	for(i = 0; i < nelem(ud->ep); i++){
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		if((ep = ud->ep[i]) == nil)
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			break;
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		if(ep->iface->csp != 0x020107)
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			continue;
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		if(ep->type == Ebulk && (ep->dir == Eboth || ep->dir == Eout))
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			if(epout == -1)
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				epout = ep->id;
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	}
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	dprint(2, "print: ep ids: out %d\n", epout);
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	if(epout == -1)
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		return -1;
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	d = openep(dev, epout);
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	if(d == nil){
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		fprint(2, "print: openep %d: %r\n", epout);
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		return -1;
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	}
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	opendevdata(d, OWRITE);
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	if(d->dfd < 0){
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		fprint(2, "print: open i/o ep data: %r\n");
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		closedev(d);
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		return -1;
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	}
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	dprint(2, "print: ep out %s\n", d->dir);
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	if(usbdebug > 1)
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		devctl(d, "debug 1");
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	devctl(d, "name lp%d", devid);
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	return 0;
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}
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static int
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usage(void)
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{
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	werrstr("usage: usb/print [-N id]");
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	return -1;
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}
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int
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printmain(Dev *dev, int argc, char **argv)
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{
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	int devid;
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	devid = dev->id;
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	ARGBEGIN{
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	case 'N':
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		devid = atoi(EARGF(usage()));
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		break;
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	default:
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		return usage();
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	}ARGEND
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	if(argc != 0)
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		return usage();
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	if(findendpoints(dev, devid) < 0){
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		werrstr("print: endpoints not found");
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		return -1;
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	}
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	return 0;
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}