ustat(2)                         UNIX System V                         ustat(2)


NAME
      ustat - get file system statistics

SYNOPSIS
      #include <sys/types.h>
      #include <ustat.h>

      int ustat(devt dev, struct ustat *buf);

DESCRIPTION
      ustat returns information about a mounted file system.  dev is a device
      number identifying a device containing a mounted file system [see
      makedev(3C)].  buf is a pointer to a ustat structure that includes the
      following elements:

            daddrt   ftfree;       /* Total free blocks */
            inot     ftinode;      /* Number of free inodes */
            char      ffname[6];    /* Filsys name */
            char      ffpack[6];    /* Filsys pack name */

      ustat fails if one or more of the following are true:

      EINVAL         dev is not the device number of a device containing a
                     mounted file system.

      EFAULT         buf points outside the process's allocated address space.

      EINTR          A signal was caught during a ustat system call.

      ENOLINK        dev is on a remote machine and the link to that machine is
                     no longer active.

      ECOMM          dev is on a remote machine and the link to that machine is
                     no longer active.

SEE ALSO
      stat(2), statvfs(2), makedev(3C), fs(4).

NOTES
      ustat will be phased out in favor of the statvfs function.

DIAGNOSTICS
      Upon successful completion, a value of 0 is returned.  Otherwise, a value
      of -1 is returned and errno is set to indicate the error.










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