unmount a file system
cc ... -lc
int umount (file)
The umount system call requests that a previously
mounted file system contained on the block special device or
directory identified by file be unmounted.
file 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.
The umount system call may be invoked only by the super user.
The umount system call fails if one or more of the
following is true:
A file on file is busy.
file points to an illegal address.
file does not exist, or is not mounted.
Components of the path pointed to by file require
hopping to multiple remote machines.
The named file does not exist.
file is on a remote machine, and the link to that
machine is no longer active.
file is not a block special device.
A component of the path-prefix is not a directory.
The process's effective user ID
is not super user.
file is remote.
Upon successful completion a value of 0 is returned.
Otherwise, a value of -1 is returned and errno
is set to indicate the error.
umount is not part of any
currently supported standard;
it was developed by UNIX System Laboratories, Inc. and
is maintained by The SCO Group.
© 2003 Caldera International, Inc. All rights reserved.
SCO OpenServer Release 5.0.7 -- 11 February 2003