usr/src/usr.sbin/amd/config/mtab_aix.c

/*
 * $Id: mtab_aix.c,v 5.2 90/06/23 22:20:36 jsp Rel $
 *
 * Copyright (c) 1990 Jan-Simon Pendry
 * Copyright (c) 1990 Imperial College of Science, Technology & Medicine
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Jan-Simon Pendry at Imperial College, London.
 *
 * Redistribution and use in source and binary forms are permitted provided
 * that: (1) source distributions retain this entire copyright notice and
 * comment, and (2) distributions including binaries display the following
 * acknowledgement:  ``This product includes software developed by the
 * University of California, Berkeley and its contributors'' in the
 * documentation or other materials provided with the distribution and in
 * all advertising materials mentioning features or use of this software.
 * Neither the name of the University nor the names of its contributors may
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 *      @(#)mtab_aix.c  5.1 (Berkeley) 6/29/90
 */

#include "am.h"

#ifdef READ_MTAB_AIX3_STYLE

#include <sys/mntctl.h>
#include <sys/vmount.h>

static struct mntent *mnt_dup(mp)
struct vmount *mp;
{
        struct mntent *new_mp = ALLOC(mntent);

        char *ty;
        new_mp->mnt_fsname = strdup(vmt2dataptr(mp, VMT_OBJECT));
        new_mp->mnt_dir = strdup(vmt2dataptr(mp, VMT_STUB));
        new_mp->mnt_opts = strdup(vmt2dataptr(mp, VMT_ARGS));
        switch (mp->vmt_gfstype) {
        case MNT_JFS:  ty = MTAB_TYPE_UFS; break;
        case MNT_NFS:  ty = MTAB_TYPE_NFS; break;
        default:  ty = "unknown"; break;
        }
        new_mp->mnt_type = strdup(ty);
        new_mp->mnt_passno = mp->vmt_vfsnumber;
        new_mp->mnt_freq = 0;

        return new_mp;
}

/*
 * Read a mount table into memory
 */
mntlist *read_mtab(fs)
char *fs;
{
        mntlist **mpp, *mhp;

        int i;
        char *mntinfo = 0, *cp;
        struct vmount *vp;
        int ret;

        /*
         * First figure out size of mount table
         * and allocate space for a copy...
         * Then get mount table for real.
         */
        ret = mntctl(MCTL_QUERY, sizeof(i), &i);
        if (ret == 0) {
                mntinfo = xmalloc(i);
                ret = mntctl(MCTL_QUERY, i, mntinfo);
        }

        if (ret <= 0) {
                plog(XLOG_ERROR, "mntctl: %m");
                goto out;
        }
#ifdef DEBUG
        /*dlog("mntctl returns %d structures", ret);*/
#endif /* DEBUG */

        mpp = &mhp;
        for (i = 0, cp = mntinfo; i < ret; i++, cp += vp->vmt_length) {
                vp = (struct vmount *) cp;

                /*
                 * Allocate a new slot
                 */
                *mpp = ALLOC(mntlist);

                /*
                 * Copy the data returned by mntctl
                 */
                (*mpp)->mnt = mnt_dup(vp);

                /*
                 * Move to next pointer
                 */
                mpp = &(*mpp)->mnext;
        }

        *mpp = 0;

out:
        if (mntinfo)
                free(mntinfo);
        return mhp;
}

#endif /* READ_MTAB_AIX3_STYLE */