add getvfsbyname

[unix-history] / usr / src / lib / libc / gen / getmntinfo.c

/*
* Copyright (c) 1989, 1993
*      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        8.1 (Berkeley) %G%";
#endif /* LIBC_SCCS and not lint */

#include <sys/param.h>
#include <sys/ucred.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);
}