DragonFly On-Line Manual Pages
REVOKE(2) DragonFly System Calls Manual REVOKE(2)
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() from a character
device file which has been revoked returns a count of zero (end of file),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 open
references to the file had been closed.
Access to a file may be revoked only by its owner or the super user.
Root, jail root, and chrooted directories cannot be revoked. It is
normally used to prepare a terminal device for a new login session,
preventing any access by a previous user of the terminal.
The revoke() function returns the value 0 if successful; otherwise the
value -1 is returned and the global variable errno is set to indicate the
Access to the named file is revoked unless one of the following:
[ENOTDIR] A component of the path prefix is not a directory.
[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
[EACCES] Search permission is denied for a component of the
[ELOOP] Too many symbolic links were encountered in
translating the pathname.
[EFAULT] Path points outside the process's allocated address
[EPERM] The caller is neither the owner of the file nor the
The revoke() function was introduced in 4.3BSD-Reno.
DragonFly 4.3 November 4, 2015 DragonFly 4.3