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diff --git a/libtreefs/treefs-s-hooks.h b/libtreefs/treefs-s-hooks.h
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+++ b/libtreefs/treefs-s-hooks.h
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+/* RPC server hooks in libtreefs (also see "treefs-hooks.h")
+
+   Copyright (C) 1995 Free Software Foundation, Inc.
+
+   Written by Miles Bader <miles@gnu.ai.mit.edu>
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#ifndef __TREEFS_S_HOOKS_H__
+#define __TREEFS_S_HOOKS_H__
+
+#include "treefs-hooks.h"
+
+/* Shorthand for declaring the various hook types (each hook has an
+   associated type so that a user can type-check his hook routine).  */
+#define DHH(name_sym, ret_type, argtypes...) \
+  typedef ret_type treefs_##name_sym##_t (struct treefs_handle * , ##argtypes);
+#define DFH(name_sym, ret_type, argtypes...) \
+  typedef ret_type treefs_##name_sym##_t (struct treefs_fsys * , ##argtypes);
+
+/* ---------------------------------------------------------------- */
+/* Hooks for file RPCs.  See <hurd/fs.defs> for more info.  */
+
+DHH(s_file_exec, error_t,
+    task_t, int, char *, unsigned, char *, unsigned, mach_port_t *, unsigned,
+    mach_port_t *, unsigned, int *, unsigned,
+    mach_port_t *, unsigned, mach_port_t *, unsigned)
+#define treefs_s_file_exec(h, args...) \
+  _TREEFS_CHH(h, S_FILE_EXEC, s_file_exec , ##args)
+DHH(s_file_chown, error_t, uid_t, gid_t)
+#define treefs_s_file_chown(h, args...)				      \
+  _TREEFS_CHH(h, S_FILE_CHOWN, s_file_chown , ##args)
+DHH(s_file_chauthor, error_t, uid_t)
+#define treefs_s_file_chauthor(h, args...)				      \
+  _TREEFS_CHH(h, S_FILE_CHAUTHOR, s_file_chauthor , ##args)
+DHH(s_file_chmod, error_t, mode_t)
+#define treefs_s_file_chmod(h, args...)				      \
+  _TREEFS_CHH(h, S_FILE_CHMOD, s_file_chmod , ##args)
+DHH(s_file_chflags, error_t, int)
+#define treefs_s_file_chflags(h, args...)				      \
+  _TREEFS_CHH(h, S_FILE_CHFLAGS, s_file_chflags , ##args)
+DHH(s_file_utimes, error_t, time_value_t, time_value_t)
+#define treefs_s_file_utimes(h, args...)				      \
+  _TREEFS_CHH(h, S_FILE_UTIMES, s_file_utimes , ##args)
+DHH(s_file_truncate, error_t, off_t)
+#define treefs_s_file_truncate(h, args...)				      \
+  _TREEFS_CHH(h, S_FILE_TRUNCATE, s_file_truncate , ##args)
+DHH(s_file_lock, error_t, struct treefs_handle *, int)
+#define treefs_s_file_lock(h, args...)				      \
+  _TREEFS_CHH(h, S_FILE_LOCK, s_file_lock , ##args)
+DHH(s_file_lock_stat, error_t, int *, int *)
+#define treefs_s_file_lock_stat(h, args...)				      \
+  _TREEFS_CHH(h, S_FILE_LOCK_STAT, s_file_lock_stat , ##args)
+DHH(s_file_notice_changes, error_t, mach_port_t)
+#define treefs_s_file_notice_changes(h, args...)			      \
+  _TREEFS_CHH(h, S_FILE_NOTICE, s_file_notice_changes , ##args)
+DHH(s_file_sync, error_t, int)
+#define treefs_s_file_sync(h, args...)				      \
+  _TREEFS_CHH(h, S_FILE_SYNC, s_file_sync , ##args)
+DHH(s_file_getlinknode, error_t, file_t *, mach_msg_type_name_t *)
+#define treefs_s_file_getlinknode(h, args...)			      \
+  _TREEFS_CHH(h, S_FILE_GET_LINK_NODE, s_file_getlinknode , ##args)
+
+/* ---------------------------------------------------------------- */
+/* Hooks for IO rpcs.  See <hurd/io.defs> for more info.  */
+
+DHH(s_io_write, error_t, char *, unsigned, off_t, int *)
+#define treefs_s_io_write(h, args...)				      \
+  _TREEFS_CHH(h, S_IO_WRITE, s_io_write , ##args)
+DHH(s_io_read, error_t, char **, unsigned *, off_t, int)
+#define treefs_s_io_read(h, args...)					      \
+  _TREEFS_CHH(h, S_IO_READ, s_io_read , ##args)
+DHH(s_io_seek, error_t, off_t, int, off_t *)
+#define treefs_s_io_seek(h, args...)					      \
+  _TREEFS_CHH(h, S_IO_SEEK, s_io_seek , ##args)
+DHH(s_io_readable, error_t, unsigned *)
+#define treefs_s_io_readable(h, args...)				      \
+  _TREEFS_CHH(h, S_IO_READABLE, s_io_readable , ##args)
+DHH(s_io_set_all_openmodes, error_t, int)
+#define treefs_s_io_set_all_openmodes(h, args...)			      \
+  _TREEFS_CHH(h, S_IO_SET_ALL_OPENMODES, s_io_set_all_openmodes , ##args)
+DHH(s_io_get_openmodes, error_t, int *)
+#define treefs_s_io_get_openmodes(h, args...)			      \
+  _TREEFS_CHH(h, S_IO_GET_OPENMODES, s_io_get_openmodes , ##args)
+DHH(s_io_set_some_openmodes, error_t, int)
+#define treefs_s_io_set_some_openmodes(h, args...)			      \
+  _TREEFS_CHH(h, S_IO_SET_SOME_OPENMODES, s_io_set_some_openmodes , ##args)
+DHH(s_io_clear_some_openmodes, error_t, int)
+#define treefs_s_io_clear_some_openmodes(h, args...)			      \
+  _TREEFS_CHH(h, S_IO_CLEAR_SOME_OPENMODES, s_io_clear_some_openmodes , ##args)
+DHH(s_io_async, error_t, mach_port_t, mach_port_t *, mach_msg_type_name_t *)
+#define treefs_s_io_async(h, args...)				      \
+  _TREEFS_CHH(h, S_IO_ASYNC, s_io_async , ##args)
+DHH(s_io_mod_owner, error_t, pid_t)
+#define treefs_s_io_mod_owner(h, args...)				      \
+  _TREEFS_CHH(h, S_IO_MOD_OWNER, s_io_mod_owner , ##args)
+DHH(s_io_get_owner, error_t, pid_t *)
+#define treefs_s_io_get_owner(h, args...)				      \
+  _TREEFS_CHH(h, S_IO_GET_OWNER, s_io_get_owner , ##args)
+DHH(s_io_get_icky_async_id, error_t, mach_port_t *, mach_msg_type_name_t *)
+#define treefs_s_io_get_icky_async_id(h, args...)			      \
+  _TREEFS_CHH(h, S_IO_GET_ICKY_ASYNC_ID, s_io_get_icky_async_id , ##args)
+DHH(s_io_select, error_t, int *, int *)
+#define treefs_s_io_select(h, args...)				      \
+  _TREEFS_CHH(h, S_IO_SELECT, s_io_select , ##args)
+DHH(s_io_stat, error_t, io_statbuf_t *)
+#define treefs_s_io_stat(h, args...)					      \
+  _TREEFS_CHH(h, S_IO_STAT, s_io_stat , ##args)
+DHH(s_io_reauthenticate, error_t, mach_port_t *, mach_msg_type_name_t *)
+#define treefs_s_io_reauthenticate(h, args...)			      \
+  _TREEFS_CHH(h, S_IO_REAUTHENTICATE, s_io_reauthenticate , ##args)
+DHH(s_io_restrict_auth, error_t,
+    mach_port_t *, mach_msg_type_name_t *, uid_t *, int, gid_t *, int);
+#define treefs_s_io_restrict_auth(h, args...)			      \
+  _TREEFS_CHH(h, S_IO_RESTRICT_AUTH, s_io_restrict_auth , ##args)
+DHH(s_io_duplicate, error_t, mach_port_t *, mach_msg_type_name_t *)
+#define treefs_s_io_duplicate(h, args...)				      \
+  _TREEFS_CHH(h, S_IO_DUPLICATE, s_io_duplicate , ##args)
+DHH(s_io_server_version, error_t, char *, int *, int *, int *)
+#define treefs_s_io_server_version(h, args...)			      \
+  _TREEFS_CHH(h, S_IO_SERVER_VERSION, s_io_server_version , ##args)
+DHH(s_io_map, error_t, mach_port_t *, mach_msg_type_name_t *, mach_port_t *, mach_msg_type_name_t *)
+#define treefs_s_io_map(h, args...)					      \
+  _TREEFS_CHH(h, S_IO_MAP, s_io_map , ##args)
+DHH(s_io_map_cntl, error_t, mach_port_t *, mach_msg_type_name_t *)
+#define treefs_s_io_map_cntl(h, args...)				      \
+  _TREEFS_CHH(h, S_IO_MAP_CNTL, s_io_map_cntl , ##args)
+DHH(s_io_release_conch, error_t, struct treefs_handle *)
+#define treefs_s_io_release_conch(h, args...)			      \
+ _TREEFS_CHH(h, S_IO_RELEASE_CONCH, s_io_release_conch, ##args)
+DHH(s_io_eofnotify, error_t);
+#define treefs_s_io_eofnotify(h, args...)				      \
+  _TREEFS_CHH(h, S_IO_EOFNOTIFY, s_io_eofnotify , ##args)
+DHH(s_io_prenotify, error_t, vm_offset_t, vm_offset_t);
+#define treefs_s_io_prenotify(h, args...)				      \
+  _TREEFS_CHH(h, S_IO_PRENOTIFY, s_io_prenotify , ##args)
+DHH(s_io_postnotify, error_t, vm_offset_t, vm_offset_t);
+#define treefs_s_io_postnotify(h, args...)				      \
+  _TREEFS_CHH(h, S_IO_POSTNOTIFY, s_io_postnotify , ##args)
+DHH(s_io_readnotify, error_t);
+#define treefs_s_io_readnotify(h, args...)				      \
+  _TREEFS_CHH(h, S_IO_READNOTIFY, s_io_readnotify , ##args)
+DHH(s_io_readsleep, error_t);
+#define treefs_s_io_readsleep(h, args...)				      \
+  _TREEFS_CHH(h, S_IO_READSLEEP, s_io_readsleep , ##args)
+DHH(s_io_sigio, error_t);
+#define treefs_s_io_sigio(h, args...)				      \
+  _TREEFS_CHH(h, S_IO_SIGIO, s_io_sigio , ##args)
+
+/* ---------------------------------------------------------------- */
+/* Hooks for directory RPCs.  See <hurd/fs.defs> for more info.  */
+
+DHH(s_dir_lookup, error_t,						      
+    char *, int, mode_t, enum retry_type *, char *,
+    file_t *, mach_msg_type_name_t *);
+#define treefs_s_dir_lookup(h, args...)				      \
+  _TREEFS_CHH(h, S_DIR_LOOKUP, s_dir_lookup , ##args)
+DHH(s_dir_readdir, error_t, char **, unsigned, int, int, vm_size_t, int *);
+#define treefs_s_dir_readdir(h, args...)				      \
+  _TREEFS_CHH(h, S_DIR_READDIR, s_dir_readdir , ##args)
+DHH(s_dir_mkdir, error_t, char *, mode_t);
+#define treefs_s_dir_mkdir(h, args...)				      \
+  _TREEFS_CHH(h, S_DIR_MKDIR, s_dir_mkdir , ##args)
+DHH(s_dir_rmdir, error_t, char *);
+#define treefs_s_dir_rmdir(h, args...)				      \
+  _TREEFS_CHH(h, S_DIR_RMDIR, s_dir_rmdir , ##args)
+DHH(s_dir_unlink, error_t, char *);
+#define treefs_s_dir_unlink(h, args...)				      \
+  _TREEFS_CHH(h, S_DIR_UNLINK, s_dir_unlink , ##args)
+DHH(s_dir_link, error_t, file_t, char *);
+#define treefs_s_dir_link(h, args...)				      \
+  _TREEFS_CHH(h, S_DIR_LINK, s_dir_link , ##args)
+DHH(s_dir_rename, error_t, char *, file_t, char *);
+#define treefs_s_dir_rename(h, args...)				      \
+  _TREEFS_CHH(h, S_DIR_RENAME, s_dir_rename , ##args)
+DHH(s_dir_mkfile, error_t, int, mode_t, mach_port_t *, mach_msg_type_name_t *);
+#define treefs_s_dir_mkfile(h, args...)				      \
+  _TREEFS_CHH(h, S_DIR_MKFILE, s_dir_mkfile , ##args)
+DHH(s_dir_notice_changes, error_t, mach_port_t *, mach_msg_type_name_t *);
+#define treefs_s_dir_notice_changes(h, args...)			      \
+  _TREEFS_CHH(h, S_DIR_NOTICE_CHANGES, s_dir_notice_changes , ##args)
+
+/* ---------------------------------------------------------------- */
+/* fsys RPCs (called on the filesystem itself) */
+
+DFH(s_fsys_getroot, error_t,
+    mach_port_t, uid_t *, unsigned, gid_t *, unsigned, int,
+    retry_type *, char *, file_t *, mach_msg_type_name_t *)
+#define treefs_s_fsys_getroot(fsys, args...) \
+  _TREEFS_CFH(fsys, S_FSYS_GETROOT, s_fsys_getroot , ##args)
+DFH(s_fsys_set_options, error_t, char *, unsigned, int)
+#define treefs_s_fsys_set_options(fsys, args...) \
+  _TREEFS_CFH(fsys, S_FSYS_SET_OPTIONS, s_fsys_set_options , ##args)
+DFH(s_fsys_goaway, error_t, int)
+#define treefs_s_fsys_goaway(fsys, args...) \
+  _TREEFS_CFH(fsys, S_FSYS_GOAWAY, s_fsys_goaway , ##args)
+DFH(s_fsys_getfile, error_t,
+    uid_t *, unsigned, gid_t *, unsigned, char *, unsigned,
+    mach_port_t *, mach_msg_type_name_t *)
+#define treefs_s_fsys_getfile(fsys, args...) \
+  _TREEFS_CFH(fsys, S_FSYS_GETFILE, s_fsys_getfile , ##args)
+DFH(s_fsys_syncfs, error_t, int, int)
+#define treefs_s_fsys_syncfs(fsys, args...) \
+  _TREEFS_CFH(fsys, S_FSYS_SYNCFS, s_fsys_syncfs , ##args)
+
+/* Turn off our shorthand notation.  */
+#undef DHH
+
+/* ---------------------------------------------------------------- */
+/* Default routines for some hooks (each is the default value for the hook
+   with the same name minus the leading underscore).  When you add something
+   here, you should also add it to the initialize code in defhooks.c.  */
+
+treefs_s_dir_lookup_t _treefs_s_dir_lookup;
+treefs_s_fsys_getroot_t _treefs_s_fsys_getroot;
+
+#endif /* __TREEFS_S_HOOKS_H__ */