UMOUNT(2)               COMMAND REFERENCE               UMOUNT(2)



NAME
     umount - remove file system

SYNOPSIS
     umount(special)
     char *special;

DESCRIPTION
     The umount command announces to the system that the special
     file is no longer to contain a removable file system; the
     associated file reverts to its ordinary interpretation.  The
     umount command is limited to the superuser.

DIAGNOSTICS
     The umount command fails when one of the following occur:

     [EPERM]        The caller is not the superuser.

     [ENOENT]       Special or path does not exist.

     [ENOENT]       A component of the path prefix of special or
                    path does not exist.

     [ENAMETOOLONG] The argument special or path is too long.

     [ENOTBLK]      Special is not a block device.

     [ENXIO]        The major device number of special is out of
                    range (this indicates no device driver exists
                    for the associated hardware).

     [ENOASCII]     The path name special or path contains a
                    character with the high-order bit set.

     [ELOOP]        Too many symbolic links were encountered in
                    translating a path name.

     [EIO]          An I/O error occurred while reading from or
                    writing to the file system.

     In addition, umount fails when one or more of the following
     occur:

     [EINVAL]       The requested device is not in the mount
                    table.

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

     [EACCES]       Search permission is denied for a component
                    of the path name prefix of special.




Printed 5/12/88                                                 1

UMOUNT(2)               COMMAND REFERENCE               UMOUNT(2)



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

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.

CAVEATS
     The umount(2) command is retained for compatibility purposes
     only; the command unmount(2) supercedes the umount(2)
     command.

SEE ALSO
     mount(8) and umount(8).








































Printed 5/12/88                                                 2

%%index%%
na:288,79;
sy:367,411;
de:778,500;
di:1278,1691;3329,117;
rv:3446,280;
ca:3726,414;
se:4140,171;
%%index%%000000000130