REVOKE(2)						      BSD System Calls Manual							 REVOKE(2)

NAME

     revoke -- revoke file access

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #include <unistd.h>

     int
     revoke(const char *path);

DESCRIPTION

     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     such descriptors fail, with the exceptions that a read(2) from a character device file which has been revoked returns a count of zero (end of
     file), and a close(2) 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 open references to the file had been closed.

     Access to a file may be revoked only by its owner or the super user.

     The revoke() function is normally used to prepare a terminal device for a new login session, preventing any access by a previous user of the
     terminal.

RETURN VALUES

     A 0 value indicates that the call succeeded.  A -1 return value indicates an error occurred and errno is set to indicate the reason.

ERRORS

     Access to the named file is revoked unless one of the following:

     [EACCES]		Search permission is denied for a component of the path prefix.

     [EFAULT]		path points outside the process's allocated address space.

     [ELOOP]		Too many symbolic links were encountered in translating the pathname.

     [ENAMETOOLONG]	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.

     [ENOTDIR]		A component of the path prefix is not a directory.

     [EPERM]		The caller is neither the owner of the file nor the super user.

SEE ALSO

     close(2), dup(2), fcntl(2), flock(2), fstat(2), read(2), write(2)

HISTORY

     The revoke() function was introduced in 4.3BSD-Reno.

BSD
								   July 3, 2011 							       BSD