usr/src/lib/libc/gen/getmntinfo.c

/*
 * Copyright (c) 1989 The Regents of the University of California.
 * All rights reserved.
 *
 * %sccs.include.redist.c%
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)getmntinfo.c        6.4 (Berkeley) %G%";
#endif /* LIBC_SCCS and not lint */

#include <sys/types.h>
#include <sys/mount.h>
#include <stdlib.h>

/*
 * Return information about mounted filesystems.
 */
int
getmntinfo(mntbufp, flags)
        struct statfs **mntbufp;
        int flags;
{
        static struct statfs *mntbuf;
        static int mntsize;
        static long bufsize;

        if (mntsize <= 0 && (mntsize = getfsstat(0, 0, MNT_NOWAIT)) < 0)
                return (0);
        if (bufsize > 0 && (mntsize = getfsstat(mntbuf, bufsize, flags)) < 0)
                return (0);
        while (bufsize <= mntsize * sizeof(struct statfs)) {
                if (mntbuf)
                        free(mntbuf);
                bufsize = (mntsize + 1) * sizeof(struct statfs);
                if ((mntbuf = (struct statfs *)malloc(bufsize)) == 0)
                        return (0);
                if ((mntsize = getfsstat(mntbuf, bufsize, flags)) < 0)
                        return (0);
        }
        *mntbufp = mntbuf;
        return (mntsize);
}