namopen.c

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/* namopen.c - namopen */

#include <xinu.h>

/*------------------------------------------------------------------------
 *  namopen  -  Open a file or device based on the name
 *------------------------------------------------------------------------
 */
devcall namopen(
      struct dentry *devptr,    /* Entry in device switch table */
      char  *name,          /* Name to open         */
      char  *mode           /* Mode argument        */
    )
{
    char    newname[NM_MAXLEN]; /* Name with prefix replaced    */
    did32   newdev;         /* Device ID after mapping  */

    /* Use namespace to map name to a new name and new descriptor */

    newdev = nammap(name, newname, devptr->dvnum);
    
    if (newdev == SYSERR) {
        return SYSERR;
    }

    /* Open underlying device and return status */

    return  open(newdev, newname, mode);
}