REVOKE(2) System Calls Manual REVOKE(2)

NAME

revokerevoke 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operations on any such descriptors fail, with the exceptions that a read(2) from a character device file which has been revoked returns a count of zero (end of file), and a close(2) call will succeed.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 {NAME_MAX} characters, or an entire path name exceeded {PATH_MAX} 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.
July 3, 2011 NetBSD 8.3