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REVOKE(2) NetBSD System Calls Manual REVOKE(2)
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by Kimmo Suominen.
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revoke -- revoke file access
Standard C Library (libc, -lc)
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(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device file which has been revoked returns a count of zero (end of file),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 termi-
A 0 value indicates that the call succeeded. A -1 return value indicates
an error occurred and errno is set to indicate the reason.
Access to the named file is revoked unless one of the following:
[EACCES] Search permission is denied for a component of the
[EFAULT] path points outside the process's allocated address
[ELOOP] Too many symbolic links were encountered in translat-
ing 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
[ENOTDIR] A component of the path prefix is not a directory.
[EPERM] The caller is neither the owner of the file nor the
close(2), dup(2), fcntl(2), flock(2), fstat(2), read(2), write(2)
The revoke() function was introduced in 4.3BSD-Reno.
NetBSD 7.1.2 July 3, 2011 NetBSD 7.1.2