Manual page for UNMOUNT(2V)
unmount, umount - remove a file system
SYNOPSIS
int unmount(name)
char *name;
SYSTEM V SYNOPSIS
int umount(special)
char *special;
DESCRIPTION
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.
Only the super-user may call
unmount().
SYSTEM V DESCRIPTION
umount()
reqests that a previously mounted file system contained on the block
special device referred to by
special
be unmounted.
special
points to a path name.
After the file system is unmounted,
the directory on which it was mounted reverts to its ordinary interpretation.
Only the super-user may call
umount().
Note:
Unlike the path name argument to
unmount()
which refers to the directory on which the file system is mounted,
special
refers to the block special device containing the mounted file system
itself.
RETURN VALUES
unmount()
returns:
- 0
-
on success.
- -1
-
on failure and sets
errno
to indicate the error.
SYSTEM V RETURN VALUES
umount()
returns:
- 0
-
on success.
- -1
-
on failure and sets
errno
to indicate the error.
ERRORS
- EACCES
-
Search permission is denied for a component of the path prefix.
- EBUSY
-
A process is holding a reference to a file located on the file system.
- EFAULT
-
name
points outside the process's allocated address space.
- EINVAL
-
name
is not the root of a mounted file system.
- EIO
-
An I/O error occurred while reading from or writing to the file system.
- ELOOP
-
Too many symbolic links were encountered in translating the path name.
- ENAMETOOLONG
-
The length of the path argument exceeds
{PATH_MAX}.
A pathname component is longer than
{NAME_MAX}
(see
sysconf.2v
while
{_POSIX_NO_TRUNC}
is in effect
(see
pathconf.2v
- ENOENT
-
name
does not exist.
- ENOTDIR
-
A component of the path prefix of
name
is not a directory.
- EPERM
-
The caller is not the super-user.
SYSTEM V ERRORS
- EINVAL
-
The device referred to by
special
is not mounted.
- ENOENT
-
The named file
does not exist.
- ENOTBLK
-
special
does not refer to a block special file.
- ENOTDIR
-
A component of the path prefix of
special
is not a directory.
- ENXIO
-
The device referred to by
special
does not exist.
SEE ALSO
mount.2v
mount.8
BUGS
The error codes are in a state of disarray; too many errors
appear to the caller as one value.
Created by unroff & hp-tools.
© somebody (See intro for details). All Rights Reserved.
Last modified 11/5/97
