revoke - revoke file access
revoke(const char *path);
The revoke function invalidates all current open file descriptors in the
system for the file named by path. Subsequent operations on
any such descriptors
fail, with the exceptions that a read() from a
file which has been revoked returns a count of zero (end of
file), and a
close() call will succeed. If the file is a special file
for a device
which is open, the device close function is called as if all
to the file had been closed.
Access to a file may be revoked only by its owner or the superuser. The
revoke function is normally used to prepare a terminal device for a new
login session, preventing any access by a previous user of
A 0 value indicated that the call succeeded. A -1 return
an error occurred and errno is set to indicated the reason.
Access to the named file is revoked unless one of the following:
[ENOTDIR] A component of the path prefix is not a directory.
A component of a pathname exceeded 255 characters, or an
entire path name exceeded 1024 characters.
[ENOENT] The named file or a component of the path name
does not exist.
[EACCES] Search permission is denied for a component of
[ELOOP] Too many symbolic links were encountered in
[EFAULT] path points outside the process's allocated
[EPERM] The caller is neither the owner of the file
nor the superuser.
The revoke function was introduced in 4.3BSD-Reno.
OpenBSD 3.6 June 4, 1993
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