source: trunk/athena/bin/quota/mountxdr.c @ 7993

#ifndef lint
/* @(#)mountxdr.c       2.1 86/04/14 NFSSRC */
static  char sccsid[] = "@(#)mountxdr.c 1.1 86/02/05 Copyr 1984 Sun Micro";
#endif

#include <stdio.h>
#include <sys/types.h>
#ifdef _IBMR2
#include <sys/select.h>
#endif
#include <rpc/rpc.h>
#include <sys/time.h>
#include <sys/errno.h>
#ifndef sgi
#include <nfs/nfs.h>
#else
#include <sys/fs/nfs.h>
#endif
#include <rpcsvc/mount.h>

#define xdr_dev_t xdr_short

xdr_fhstatus(xdrs, fhsp)
        XDR *xdrs;
        struct fhstatus *fhsp;
{
        if (!xdr_int(xdrs, &fhsp->fhs_status))
                return FALSE;
        if (fhsp->fhs_status == 0) {
                if (!xdr_fhandle(xdrs, &fhsp->fhs_fh))
                        return FALSE;
        }
}

xdr_fhandle(xdrs, fhp)
        XDR *xdrs;
        fhandle_t *fhp;
{
        if (xdr_opaque(xdrs, fhp, NFS_FHSIZE)) {
                return (TRUE);
        }
        return (FALSE);
}

bool_t
xdr_path(xdrs, pathp)
        XDR *xdrs;
        char **pathp;
{
        if (xdr_string(xdrs, pathp, 1024)) {
                return(TRUE);
        }
        return(FALSE);
}

/* 
 * body of a mountlist
 */
bool_t
xdr_mountbody(xdrs, mlp)
        XDR *xdrs;
        struct mountlist *mlp;
{
        if (!xdr_path(xdrs, &mlp->ml_name))
                return FALSE;
        if (!xdr_path(xdrs, &mlp->ml_path))
                return FALSE;
        return(TRUE);
}

bool_t
xdr_mountlist(xdrs, mlp)
        register XDR *xdrs;
        register struct mountlist **mlp;
{
        /*
         * more_elements is pre-computed in case the direction is
         * XDR_ENCODE or XDR_FREE.  more_elements is overwritten by
         * xdr_bool when the direction is XDR_DECODE.
         */
        int more_elements;
        register int freeing = (xdrs->x_op == XDR_FREE);
        register struct mountlist **nxt;

        while (TRUE) {
                more_elements = (*mlp != NULL);
                if (! xdr_bool(xdrs, &more_elements))
                        return (FALSE);
                if (! more_elements)
                        return (TRUE);  /* we are done */
                /*
                 * the unfortunate side effect of non-recursion is that in
                 * the case of freeing we must remember the nxt object
                 * before we free the current object ...
                 */
                if (freeing)
                        nxt = &((*mlp)->ml_nxt); 
                if (! xdr_reference(xdrs, mlp, sizeof(struct mountlist),
                    xdr_mountbody))
                        return (FALSE);
                mlp = (freeing) ? nxt : &((*mlp)->ml_nxt);
        }
}

/*
 * Strange but true: the boolean that tells if another element
 * in the list is present has already been checked.  We handle the
 * body of this element then check on the next element.  YUK.
 */
bool_t
xdr_groups(xdrs, gr)
        register XDR *xdrs;
        register struct groups *gr;
{
        /*
         * more_elements is pre-computed in case the direction is
         * XDR_ENCODE or XDR_FREE.  more_elements is overwritten by
         * xdr_bool when the direction is XDR_DECODE.
         */
        int more_elements;
        register int freeing = (xdrs->x_op == XDR_FREE);
        register struct groups *nxt;

        if (! xdr_path(xdrs, &(gr->g_name)))
                return (FALSE);
        more_elements = (gr->g_next != NULL);
        if (! xdr_bool(xdrs, &more_elements))
                return (FALSE);
        if (! more_elements) {
                gr->g_next = NULL;
                return (TRUE);  /* we are done */
        }
        return (xdr_reference(xdrs, &(gr->g_next), sizeof(struct groups),
            xdr_groups));
}

/* 
 * body of a exportlist
 */
bool_t
xdr_exportbody(xdrs, ex)
        XDR *xdrs;
        struct exports *ex;
{
        int more_elements;

        if (!xdr_path(xdrs, &ex->ex_name))
                return FALSE;
        more_elements = (ex->ex_groups != NULL);
        if (! xdr_bool(xdrs, &more_elements))
                return (FALSE);
        if (! more_elements) {
                ex->ex_groups = NULL;
                return (TRUE);  /* we are done */
        }
        if (! xdr_reference(xdrs, &(ex->ex_groups), sizeof(struct groups),
            xdr_groups))
                return (FALSE);
        return(TRUE);
}


/*
 * Encodes the export list structure "exports" on the
 * wire as:
 * bool_t eol;
 * if (!eol) {
 *      char *name;
 *      struct groups *groups;
 * }
 * where groups look like:
 * if (!eog) {
 *      char *gname;
 * }
 */
bool_t
xdr_exports(xdrs, exp)
        register XDR *xdrs;
        register struct exports **exp;
{
        /*
         * more_elements is pre-computed in case the direction is
         * XDR_ENCODE or XDR_FREE.  more_elements is overwritten by
         * xdr_bool when the direction is XDR_DECODE.
         */
        int more_elements;
        register int freeing = (xdrs->x_op == XDR_FREE);
        register struct exports **nxt;

        while (TRUE) {
                more_elements = (*exp != NULL);
                if (! xdr_bool(xdrs, &more_elements))
                        return (FALSE);
                if (! more_elements)
                        return (TRUE);  /* we are done */
                /*
                 * the unfortunate side effect of non-recursion is that in
                 * the case of freeing we must remember the nxt object
                 * before we free the current object ...
                 */
                if (freeing)
                        nxt = &((*exp)->ex_next); 
                if (! xdr_reference(xdrs, exp, sizeof(struct exports),
                    xdr_exportbody))
                        return (FALSE);
                exp = (freeing) ? nxt : &((*exp)->ex_next);
        }
}