V1/man/man2/umount.2

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        11/3/71                                            SYS UMOUNT (II)


NAME              umount -- dismount file system

SYNOPSIS          sys umount; special / umount = 22.; not in assembler

DESCRIPTION       umount announces to the system that special file special is no longer
                  to contain a removable file system. The file associated with the
                  special file reverts to its ordinary interpretation (see mount).

                  The user must take care that all activity on the file system has
                  ceased.

FILES

SEE ALSO          mount

DIAGNOSTICS       Error bit (c--bit) set if no file system was mounted on the special
                  file.

BUGS              Use of this call should be restricted to the super--user.

OWNER             ken, dmr