/* ********************************************************************** *\
 *         Copyright IBM Corporation 1988,1991 - All Rights Reserved      *
 *        For full copyright information see:'andrew/config/COPYRITE'     *
\* ********************************************************************** */

/*
	$Disclaimer: 
 * Permission to use, copy, modify, and distribute this software and its 
 * documentation for any purpose is hereby granted without fee, 
 * provided that the above copyright notice appear in all copies and that 
 * both that copyright notice, this permission notice, and the following 
 * disclaimer appear in supporting documentation, and that the names of 
 * IBM, Carnegie Mellon University, and other copyright holders, not be 
 * used in advertising or publicity pertaining to distribution of the software 
 * without specific, written prior permission.
 * 
 * IBM, CARNEGIE MELLON UNIVERSITY, AND THE OTHER COPYRIGHT HOLDERS 
 * DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING 
 * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.  IN NO EVENT 
 * SHALL IBM, CARNEGIE MELLON UNIVERSITY, OR ANY OTHER COPYRIGHT HOLDER 
 * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY 
 * DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, 
 * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 
 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 
 * OF THIS SOFTWARE.
 *  $
*/

#ifndef NORCSID
#define NORCSID
static char rcsid[]="$Header: /afs/cs.cmu.edu/project/atk-dist/auis-6.3/ams/libs/ms/RCS/pfmsg.c,v 2.12 1992/12/15 21:20:00 rr2b R6tape $";
#endif


 

#include <andrewos.h>
#include <ms.h>
#ifdef AFS_ENV
#include <netinet/in.h>
#include <afs/param.h>
#include <sys/ioctl.h>
#include <afs/errors.h>
#include <afs/prs_fs.h>
#include <afs/venus.h>
#endif /* AFS_ENV */

MS_PrefetchMessage(DirName, id, GetNext) /* prefetch a vice file */
char *DirName, *id;
int GetNext;
{
#ifdef AFS_ENV
    struct MS_Directory *Dir;
    struct ViceIoctl blob;
    int msgnum;
    char SnapshotDum[AMS_SNAPSHOTSIZE+1], FileName[1+MAXPATHLEN];

    if (AMS_ViceIsRunning) {
    blob.out_size = 0;
    blob.in_size = 0;

    if (!id || !*id) {
	/* Just prefetch the folder */
	sprintf(FileName, "%s/%s", DirName, MS_DIRNAME);
    } else {
	if (ReadOrFindMSDir(DirName, &Dir, MD_READ) != 0) {
	    return(mserrcode);
	}
	if (GetSnapshotByID(Dir, id, &msgnum, SnapshotDum)) {
	    CloseMSDir(Dir, MD_READ);
	    return(mserrcode);
	}
	if (GetNext && GetSnapshotByNumber(Dir, ++msgnum, SnapshotDum)) {
	    CloseMSDir(Dir, MD_READ);
	    return(mserrcode);
	}
	CacheDirectoryForClosing(Dir, MD_READ);
	QuickGetBodyFileName(Dir->UNIXDir, AMS_ID(SnapshotDum), FileName);
    }
    if (pioctl(FileName, VIOCPREFETCH, &blob) &&
	(RetryBodyFileName(FileName) < 0
	 || pioctl(FileName, VIOCPREFETCH, &blob))) {
	AMS_RETURN_ERRCODE(errno, EIN_PIOCTL, EVIA_PREFETCHMSG);
    }
    }
#endif /* AFS_ENV */
    return(0);
}