|
Packit Service |
c3aa71 |
/* Hook for making making file descriptor functions close(), ioctl() extensible.
|
|
Packit Service |
c3aa71 |
Copyright (C) 2009-2015 Free Software Foundation, Inc.
|
|
Packit Service |
c3aa71 |
|
|
Packit Service |
c3aa71 |
This program is free software: you can redistribute it and/or modify it
|
|
Packit Service |
c3aa71 |
under the terms of the GNU General Public License as published
|
|
Packit Service |
c3aa71 |
by the Free Software Foundation; either version 3 of the License, or
|
|
Packit Service |
c3aa71 |
(at your option) any later version.
|
|
Packit Service |
c3aa71 |
|
|
Packit Service |
c3aa71 |
This program is distributed in the hope that it will be useful,
|
|
Packit Service |
c3aa71 |
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
Packit Service |
c3aa71 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Packit Service |
c3aa71 |
General Public License for more details.
|
|
Packit Service |
c3aa71 |
|
|
Packit Service |
c3aa71 |
You should have received a copy of the GNU General Public License
|
|
Packit Service |
c3aa71 |
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
|
Packit Service |
c3aa71 |
|
|
Packit Service |
c3aa71 |
|
|
Packit Service |
c3aa71 |
#ifndef FD_HOOK_H
|
|
Packit Service |
c3aa71 |
#define FD_HOOK_H
|
|
Packit Service |
c3aa71 |
|
|
Packit Service |
c3aa71 |
#ifdef __cplusplus
|
|
Packit Service |
c3aa71 |
extern "C" {
|
|
Packit Service |
c3aa71 |
#endif
|
|
Packit Service |
c3aa71 |
|
|
Packit Service |
c3aa71 |
|
|
Packit Service |
c3aa71 |
/* Currently, this entire code is only needed for the handling of sockets
|
|
Packit Service |
c3aa71 |
on native Windows platforms. */
|
|
Packit Service |
c3aa71 |
#if WINDOWS_SOCKETS
|
|
Packit Service |
c3aa71 |
|
|
Packit Service |
c3aa71 |
|
|
Packit Service |
c3aa71 |
/* Type of function that closes FD. */
|
|
Packit Service |
c3aa71 |
typedef int (*gl_close_fn) (int fd);
|
|
Packit Service |
c3aa71 |
|
|
Packit Service |
c3aa71 |
/* Type of function that applies a control request to FD. */
|
|
Packit Service |
c3aa71 |
typedef int (*gl_ioctl_fn) (int fd, int request, void *arg);
|
|
Packit Service |
c3aa71 |
|
|
Packit Service |
c3aa71 |
/* An element of the list of file descriptor hooks.
|
|
Packit Service |
c3aa71 |
In CLOS (Common Lisp Object System) speak, it consists of an "around"
|
|
Packit Service |
c3aa71 |
method for the close() function and an "around" method for the ioctl()
|
|
Packit Service |
c3aa71 |
function.
|
|
Packit Service |
c3aa71 |
The fields of this structure are considered private. */
|
|
Packit Service |
c3aa71 |
struct fd_hook
|
|
Packit Service |
c3aa71 |
{
|
|
Packit Service |
c3aa71 |
/* Doubly linked list. */
|
|
Packit Service |
c3aa71 |
struct fd_hook *private_next;
|
|
Packit Service |
c3aa71 |
struct fd_hook *private_prev;
|
|
Packit Service |
c3aa71 |
/* Function that treats the types of FD that it knows about and calls
|
|
Packit Service |
c3aa71 |
execute_close_hooks (REMAINING_LIST, PRIMARY, FD) as a fallback. */
|
|
Packit Service |
c3aa71 |
int (*private_close_fn) (const struct fd_hook *remaining_list,
|
|
Packit Service |
c3aa71 |
gl_close_fn primary,
|
|
Packit Service |
c3aa71 |
int fd);
|
|
Packit Service |
c3aa71 |
/* Function that treats the types of FD that it knows about and calls
|
|
Packit Service |
c3aa71 |
execute_ioctl_hooks (REMAINING_LIST, PRIMARY, FD, REQUEST, ARG) as a
|
|
Packit Service |
c3aa71 |
fallback. */
|
|
Packit Service |
c3aa71 |
int (*private_ioctl_fn) (const struct fd_hook *remaining_list,
|
|
Packit Service |
c3aa71 |
gl_ioctl_fn primary,
|
|
Packit Service |
c3aa71 |
int fd, int request, void *arg);
|
|
Packit Service |
c3aa71 |
};
|
|
Packit Service |
c3aa71 |
|
|
Packit Service |
c3aa71 |
/* This type of function closes FD, applying special knowledge for the FD
|
|
Packit Service |
c3aa71 |
types it knows about, and calls
|
|
Packit Service |
c3aa71 |
execute_close_hooks (REMAINING_LIST, PRIMARY, FD)
|
|
Packit Service |
c3aa71 |
for the other FD types.
|
|
Packit Service |
c3aa71 |
In CLOS speak, REMAINING_LIST is the remaining list of "around" methods,
|
|
Packit Service |
c3aa71 |
and PRIMARY is the "primary" method for close(). */
|
|
Packit Service |
c3aa71 |
typedef int (*close_hook_fn) (const struct fd_hook *remaining_list,
|
|
Packit Service |
c3aa71 |
gl_close_fn primary,
|
|
Packit Service |
c3aa71 |
int fd);
|
|
Packit Service |
c3aa71 |
|
|
Packit Service |
c3aa71 |
/* Execute the close hooks in REMAINING_LIST, with PRIMARY as "primary" method.
|
|
Packit Service |
c3aa71 |
Return 0 or -1, like close() would do. */
|
|
Packit Service |
c3aa71 |
extern int execute_close_hooks (const struct fd_hook *remaining_list,
|
|
Packit Service |
c3aa71 |
gl_close_fn primary,
|
|
Packit Service |
c3aa71 |
int fd);
|
|
Packit Service |
c3aa71 |
|
|
Packit Service |
c3aa71 |
/* Execute all close hooks, with PRIMARY as "primary" method.
|
|
Packit Service |
c3aa71 |
Return 0 or -1, like close() would do. */
|
|
Packit Service |
c3aa71 |
extern int execute_all_close_hooks (gl_close_fn primary, int fd);
|
|
Packit Service |
c3aa71 |
|
|
Packit Service |
c3aa71 |
/* This type of function applies a control request to FD, applying special
|
|
Packit Service |
c3aa71 |
knowledge for the FD types it knows about, and calls
|
|
Packit Service |
c3aa71 |
execute_ioctl_hooks (REMAINING_LIST, PRIMARY, FD, REQUEST, ARG)
|
|
Packit Service |
c3aa71 |
for the other FD types.
|
|
Packit Service |
c3aa71 |
In CLOS speak, REMAINING_LIST is the remaining list of "around" methods,
|
|
Packit Service |
c3aa71 |
and PRIMARY is the "primary" method for ioctl(). */
|
|
Packit Service |
c3aa71 |
typedef int (*ioctl_hook_fn) (const struct fd_hook *remaining_list,
|
|
Packit Service |
c3aa71 |
gl_ioctl_fn primary,
|
|
Packit Service |
c3aa71 |
int fd, int request, void *arg);
|
|
Packit Service |
c3aa71 |
|
|
Packit Service |
c3aa71 |
/* Execute the ioctl hooks in REMAINING_LIST, with PRIMARY as "primary" method.
|
|
Packit Service |
c3aa71 |
Return 0 or -1, like ioctl() would do. */
|
|
Packit Service |
c3aa71 |
extern int execute_ioctl_hooks (const struct fd_hook *remaining_list,
|
|
Packit Service |
c3aa71 |
gl_ioctl_fn primary,
|
|
Packit Service |
c3aa71 |
int fd, int request, void *arg);
|
|
Packit Service |
c3aa71 |
|
|
Packit Service |
c3aa71 |
/* Execute all ioctl hooks, with PRIMARY as "primary" method.
|
|
Packit Service |
c3aa71 |
Return 0 or -1, like ioctl() would do. */
|
|
Packit Service |
c3aa71 |
extern int execute_all_ioctl_hooks (gl_ioctl_fn primary,
|
|
Packit Service |
c3aa71 |
int fd, int request, void *arg);
|
|
Packit Service |
c3aa71 |
|
|
Packit Service |
c3aa71 |
/* Add a function pair to the list of file descriptor hooks.
|
|
Packit Service |
c3aa71 |
CLOSE_HOOK and IOCTL_HOOK may be NULL, indicating no change.
|
|
Packit Service |
c3aa71 |
The LINK variable points to a piece of memory which is guaranteed to be
|
|
Packit Service |
c3aa71 |
accessible until the corresponding call to unregister_fd_hook. */
|
|
Packit Service |
c3aa71 |
extern void register_fd_hook (close_hook_fn close_hook, ioctl_hook_fn ioctl_hook,
|
|
Packit Service |
c3aa71 |
struct fd_hook *link);
|
|
Packit Service |
c3aa71 |
|
|
Packit Service |
c3aa71 |
/* Removes a hook from the list of file descriptor hooks. */
|
|
Packit Service |
c3aa71 |
extern void unregister_fd_hook (struct fd_hook *link);
|
|
Packit Service |
c3aa71 |
|
|
Packit Service |
c3aa71 |
|
|
Packit Service |
c3aa71 |
#endif
|
|
Packit Service |
c3aa71 |
|
|
Packit Service |
c3aa71 |
|
|
Packit Service |
c3aa71 |
#ifdef __cplusplus
|
|
Packit Service |
c3aa71 |
}
|
|
Packit Service |
c3aa71 |
#endif
|
|
Packit Service |
c3aa71 |
|
|
Packit Service |
c3aa71 |
#endif /* FD_HOOK_H */
|