DragonFly On-Line Manual Pages

REVOKE(2)                DragonFly 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() 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     device file which has been revoked returns a count of zero (end of file),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.

RETURN VALUES
     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
     error.

ERRORS
     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
                        not exist.

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

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

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

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

SEE ALSO
     close(2)

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

DragonFly 4.3                  November 4, 2015                  DragonFly 4.3