/* open.c - open */

#include 

/*------------------------------------------------------------------------
 *  open  -  Open a device (some devices ignore name and mode parameters)
 *------------------------------------------------------------------------
 */
syscall open(
          did32         descrp,         /* Descriptor for device        */
          char          *name,          /* Name to use, if any          */
          char          *mode           /* Mode for device, if any      */
        )
{
        intmask         mask;           /* Saved interrupt mask         */
        struct dentry   *devptr;        /* Entry in device switch table */
        int32           retval;         /* Value to return to caller    */

        mask = disable();
        if (isbaddev(descrp)) {
                restore(mask);
                return SYSERR;
        }
        devptr = (struct dentry *) &devtab[descrp];
        retval = (*devptr->dvopen) (devptr, name, mode);
        restore(mask);
        return retval;
}