UMOUNT(2)                HP Integral PC                 UMOUNT(2)
     UMOUNT(2)                HP Integral PC                 UMOUNT(2)
     UMOUNT(2)                HP Integral PC                 UMOUNT(2)
     UMOUNT(2)                HP Integral PC                 UMOUNT(2)



     NAME
     NAME
     NAME
     NAME
          umount - unmount a file system

     SYNOPSIS
     SYNOPSIS
     SYNOPSIS
     SYNOPSIS
          int umount (spec)
          char *spec;

     DESCRIPTION
     DESCRIPTION
     DESCRIPTION
     DESCRIPTION
          Umount requests that a previously mounted file system
          contained on the block special device identified by spec be
          unmounted.  Spec is a pointer to a path name.  After
          unmounting the file system, the directory upon which the
          file system was mounted reverts to its ordinary
          interpretation.

          Umount will fail if one or more of the following are true:

               Spec does not exist.  [ENXIO]

               Spec is not a block special device.  [ENOTBLK]

               Spec is not mounted.  [EINVAL]

               A file on spec is busy.  [EBUSY]

               Spec points outside the process's allocated address
               space.  [EFAULT]

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

     DIAGNOSTICS
     DIAGNOSTICS
     DIAGNOSTICS
     DIAGNOSTICS
          This kernel call should be used only in conjunction with the
          explicit use of a mount kernel call.  If this is not done
          and this kernel call is used to unmount a file system
          mounted via the mount command, the system by which file
          systems are mounted and unmounted by user commands will
          become confused and will cease to work properly.

     SEE ALSO
     SEE ALSO
     SEE ALSO
     SEE ALSO
          mount(1M), mount(2).












     Hewlett-Packard               - 1 -            (printed 12/12/84)