ustat(2)                                                              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                    no longer active.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                    no longer active.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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