lfflush.c

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/* lfflush.c - lfflush */

#include <xinu.h>

/*------------------------------------------------------------------------
 * lfflush  -  Flush directory, data block, and index block for an open
 *          file (assumes file mutex is held)
 *------------------------------------------------------------------------
 */
status  lfflush (
      struct lflcblk  *lfptr    /* Ptr to file pseudo device    */
    )
{

    if (lfptr->lfstate == LF_FREE) {
        return SYSERR;
    }

    /* Write the directory if it has changed */

    if (Lf_data.lf_dirdirty) {
        write(Lf_data.lf_dskdev, (char *)&Lf_data.lf_dir,
                            LF_AREA_DIR);
        Lf_data.lf_dirdirty = FALSE;
    }

    /* Write data block if it has changed */

    if (lfptr->lfdbdirty) {
        write(Lf_data.lf_dskdev, lfptr->lfdblock, lfptr->lfdnum);
        lfptr->lfdbdirty = FALSE;
    }

    /* Write i-block if it has changed */

    if (lfptr->lfibdirty) {
        lfibput(Lf_data.lf_dskdev, lfptr->lfinum, &lfptr->lfiblock);
        lfptr->lfibdirty = FALSE;
    }
    
    return OK;
}