Subversion Repositories planix.SVN

/*
 * usb/print - usb printer file server
 * BUG: Assumes the printer will be always connected and
 * not hot-plugged. (Otherwise should stay running and
 * listen to errors to keep the device there as long as it has
 * not failed). Also, this is untested and done ad-hoc to
 * replace the print script.
 */
#include <u.h>
#include <libc.h>
#include <thread.h>
#include "usb.h"

enum
{
        Qdir = 0,
        Qctl,
        Qraw,
        Qdata,
        Qmax,
};

int
findendpoints(Dev *dev, int devid)
{
        Ep *ep;
        Dev *d;
        Usbdev *ud;
        int i, epout;

        epout = -1;
        ud = dev->usb;
        for(i = 0; i < nelem(ud->ep); i++){
                if((ep = ud->ep[i]) == nil)
                        break;
                if(ep->iface->csp != 0x020107)
                        continue;
                if(ep->type == Ebulk && (ep->dir == Eboth || ep->dir == Eout))
                        if(epout == -1)
                                epout = ep->id;
        }
        dprint(2, "print: ep ids: out %d\n", epout);
        if(epout == -1)
                return -1;
        d = openep(dev, epout);
        if(d == nil){
                fprint(2, "print: openep %d: %r\n", epout);
                return -1;
        }
        opendevdata(d, OWRITE);
        if(d->dfd < 0){
                fprint(2, "print: open i/o ep data: %r\n");
                closedev(d);
                return -1;
        }
        dprint(2, "print: ep out %s\n", d->dir);
        if(usbdebug > 1)
                devctl(d, "debug 1");
        devctl(d, "name lp%d", devid);
        return 0;
}

static int
usage(void)
{
        werrstr("usage: usb/print [-N id]");
        return -1;
}

int
printmain(Dev *dev, int argc, char **argv)
{
        int devid;

        devid = dev->id;
        ARGBEGIN{
        case 'N':
                devid = atoi(EARGF(usage()));
                break;
        default:
                return usage();
        }ARGEND
        if(argc != 0)
                return usage();

        if(findendpoints(dev, devid) < 0){
                werrstr("print: endpoints not found");
                return -1;
        }
        return 0;
}