unmount(2)                                             unmount(2)



NAME
     unmount - remove a file system

SYNOPSIS
     unmount(name)
     char *name;

DESCRIPTION
     unmount is used to unmount all non-System V file systems.
     umount is used to unmount System V file systems only (see
     umount(2)).

     unmount announces to the system that the directory name is
     no longer to refer to the root of a mounted file system.
     The directory name reverts to its ordinary interpretation.

STATUS MESSAGES AND VALUES
     The unmount command returns 0 if the action occurred; -1 if
     the directory is inaccessible or does not have a mounted
     file system, or if there are active files in the mounted
     file system.

     The unmount command can fail with one of the following
     errors:

     EINVAL
          The caller is not the superuser.

     EINVAL
          name is not the root of a mounted file system.

     EBUSY
          A process is holding a reference to a file located on
          the file system.

LIMITATIONS
     The error codes are in a state of disarray; too many errors
     appear to the caller as one value.

SEE ALSO
     fsmount(2), umount(2), mount(3)














January 1992                                                    1