MOUNT(2) MOUNT(2)
NAME
mount, umount - mount or remove file system
SYNOPSIS
mount(special, name, rwflag)
char *special, *name;
umount(special)
char *special;
DESCRIPTION
Mount announces to the system that a removable file system
has been mounted on the block-structured special file
special; from now on, references to file name will refer to
the root file on the newly mounted file system. Special and
name are pointers to null-terminated strings containing the
appropriate path names.
Name must exist already. Name must be a directory (unless
the root of the mounted file system is not a directory).
Its old contents are inaccessible while the file system is
mounted.
The rwflag argument determines whether the file system can
be written on; if it is 0 writing is allowed, if non-zero no
writing is done. Physically write-protected and magnetic
tape file systems must be mounted read-only or errors will
occur when access times are updated, whether or not any
explicit write is attempted.
Umount 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.
SEE ALSO
mount(8)
DIAGNOSTICS
Mount returns 0 if the action occurred; -1 if special is
inaccessible or not an appropriate file; if name does not
exist; if special is already mounted; if name is in use; or
if there are already too many file systems mounted.
Umount returns 0 if the action occurred; -1 if the special
file is inaccessible or does not have a mounted file system,
or if there are active files in the mounted file system.