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Implemented file change notifications, based on a patch by Mike 

McCormack.
This commit is contained in:
Alexandre Julliard 2003-03-26 23:41:43 +00:00
parent 473a88661e
commit 3e588e3a57
11 changed files with 215 additions and 46 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
dlls/kernel/Makefile.in
View File

@ -21,6 +21,7 @@ SPEC_SRCS16 = \
C_SRCS = \
$(TOPOBJDIR)/ole/ole2nls.c \
change.c \
comm.c \
computername.c \
console.c \

48
files/change.c → dlls/kernel/change.c
View File

@ -1,11 +1,6 @@
/*
* Win32 file change notification functions
*
* FIXME: this is VERY difficult to implement with proper Unix support
* at the wineserver side.
* (Unix doesn't really support this)
* See http://x57.deja.com/getdoc.xp?AN=575483053 for possible solutions.
*
* Copyright 1998 Ulrich Weigand
*
* This library is free software; you can redistribute it and/or
@ -25,13 +20,9 @@
#include "config.h"
#include <assert.h>
#include <stdlib.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <string.h>
#include <time.h>
#include "winbase.h"
#include "winerror.h"
#include "wine/server.h"
@ -45,38 +36,49 @@ WINE_DEFAULT_DEBUG_CHANNEL(file);
HANDLE WINAPI FindFirstChangeNotificationA( LPCSTR lpPathName, BOOL bWatchSubtree,
DWORD dwNotifyFilter )
{
HANDLE ret = INVALID_HANDLE_VALUE;
HANDLE file, ret = INVALID_HANDLE_VALUE;
FIXME("this is not supported yet (non-trivial).\n");
TRACE( "%s %d %lx\n", debugstr_a(lpPathName), bWatchSubtree, dwNotifyFilter );
if ((file = CreateFileA( lpPathName, 0, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL,
OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0 )) == INVALID_HANDLE_VALUE)
return INVALID_HANDLE_VALUE;
SERVER_START_REQ( create_change_notification )
{
req->handle = file;
req->subtree = bWatchSubtree;
req->filter = dwNotifyFilter;
if (!wine_server_call_err( req )) ret = reply->handle;
}
SERVER_END_REQ;
CloseHandle( file );
return ret;
}
/****************************************************************************
* FindFirstChangeNotificationW (KERNEL32.@)
*/
HANDLE WINAPI FindFirstChangeNotificationW( LPCWSTR lpPathName,
BOOL bWatchSubtree,
HANDLE WINAPI FindFirstChangeNotificationW( LPCWSTR lpPathName, BOOL bWatchSubtree,
DWORD dwNotifyFilter)
{
HANDLE ret = INVALID_HANDLE_VALUE;
HANDLE file, ret = INVALID_HANDLE_VALUE;
FIXME("this is not supported yet (non-trivial).\n");
TRACE( "%s %d %lx\n", debugstr_w(lpPathName), bWatchSubtree, dwNotifyFilter );
if ((file = CreateFileW( lpPathName, 0, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL,
OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0 )) == INVALID_HANDLE_VALUE)
return INVALID_HANDLE_VALUE;
SERVER_START_REQ( create_change_notification )
{
req->handle = file;
req->subtree = bWatchSubtree;
req->filter = dwNotifyFilter;
if (!wine_server_call_err( req )) ret = reply->handle;
}
SERVER_END_REQ;
CloseHandle( file );
return ret;
}
@ -85,8 +87,17 @@ HANDLE WINAPI FindFirstChangeNotificationW( LPCWSTR lpPathName,
*/
BOOL WINAPI FindNextChangeNotification( HANDLE handle )
{
/* FIXME: do something */
return TRUE;
BOOL ret;
TRACE("%p\n",handle);
SERVER_START_REQ( next_change_notification )
{
req->handle = handle;
ret = !wine_server_call_err( req );
}
SERVER_END_REQ;
return ret;
}
/****************************************************************************
@ -96,4 +107,3 @@ BOOL WINAPI FindCloseChangeNotification( HANDLE handle)
{
return CloseHandle( handle );
}

1
dlls/ntdll/Makefile.in
View File

@ -7,7 +7,6 @@ MODULE = ntdll.dll
EXTRALIBS = $(LIBUNICODE)
C_SRCS = \
$(TOPOBJDIR)/files/change.c \
$(TOPOBJDIR)/files/directory.c \
$(TOPOBJDIR)/files/dos_fs.c \
$(TOPOBJDIR)/files/drive.c \

19
include/wine/server_protocol.h
View File

@ -1429,8 +1429,9 @@ struct send_console_signal_reply
struct create_change_notification_request
{
struct request_header __header;
obj_handle_t handle;
int subtree;
int filter;
unsigned int filter;
};
struct create_change_notification_reply
{
@ -1440,6 +1441,17 @@ struct create_change_notification_reply
struct next_change_notification_request
{
struct request_header __header;
obj_handle_t handle;
};
struct next_change_notification_reply
{
struct reply_header __header;
};
struct create_mapping_request
{
struct request_header __header;
@ -3095,6 +3107,7 @@ enum request
REQ_move_console_output,
REQ_send_console_signal,
REQ_create_change_notification,
REQ_next_change_notification,
REQ_create_mapping,
REQ_open_mapping,
REQ_get_mapping_info,
@ -3276,6 +3289,7 @@ union generic_request
struct move_console_output_request move_console_output_request;
struct send_console_signal_request send_console_signal_request;
struct create_change_notification_request create_change_notification_request;
struct next_change_notification_request next_change_notification_request;
struct create_mapping_request create_mapping_request;
struct open_mapping_request open_mapping_request;
struct get_mapping_info_request get_mapping_info_request;
@ -3455,6 +3469,7 @@ union generic_reply
struct move_console_output_reply move_console_output_reply;
struct send_console_signal_reply send_console_signal_reply;
struct create_change_notification_reply create_change_notification_reply;
struct next_change_notification_reply next_change_notification_reply;
struct create_mapping_reply create_mapping_reply;
struct open_mapping_reply open_mapping_reply;
struct get_mapping_info_reply get_mapping_info_reply;
@ -3557,6 +3572,6 @@ union generic_reply
struct get_next_hook_reply get_next_hook_reply;
};
#define SERVER_PROTOCOL_VERSION 102
#define SERVER_PROTOCOL_VERSION 103
#endif /* __WINE_WINE_SERVER_PROTOCOL_H */

148
server/change.c
View File

@ -18,25 +18,37 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#include "wine/port.h"
#include <assert.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include "windef.h"
#include "file.h"
#include "handle.h"
#include "thread.h"
#include "request.h"
#include "list.h"
struct change
{
struct object obj; /* object header */
struct fd *fd; /* file descriptor to the directory */
struct list entry; /* entry in global change notifications list */
int subtree; /* watch all the subtree */
int filter; /* notification filter */
unsigned int filter; /* notification filter */
long notified; /* SIGIO counter */
long signaled; /* the file changed */
};
static void change_dump( struct object *obj, int verbose );
static int change_signaled( struct object *obj, struct thread *thread );
static void change_destroy( struct object *obj );
static const struct object_ops change_ops =
{
@ -47,17 +59,72 @@ static const struct object_ops change_ops =
change_signaled, /* signaled */
no_satisfied, /* satisfied */
no_get_fd, /* get_fd */
no_destroy /* destroy */
change_destroy /* destroy */
};
static struct list change_list = LIST_INIT(change_list);
static struct change *create_change_notification( int subtree, int filter )
static void adjust_changes( int fd, unsigned int filter )
{
#ifdef F_NOTIFY
unsigned int val;
if ( 0 > fcntl( fd, F_SETSIG, SIGIO) )
return;
val = DN_MULTISHOT;
if( filter & FILE_NOTIFY_CHANGE_FILE_NAME )
val |= DN_RENAME | DN_DELETE | DN_CREATE;
if( filter & FILE_NOTIFY_CHANGE_DIR_NAME )
val |= DN_RENAME | DN_DELETE | DN_CREATE;
if( filter & FILE_NOTIFY_CHANGE_ATTRIBUTES )
val |= DN_ATTRIB;
if( filter & FILE_NOTIFY_CHANGE_SIZE )
val |= DN_MODIFY;
if( filter & FILE_NOTIFY_CHANGE_LAST_WRITE )
val |= DN_MODIFY;
if( filter & FILE_NOTIFY_CHANGE_SECURITY )
val |= DN_ATTRIB;
fcntl( fd, F_NOTIFY, val );
#endif
}
/* insert change in the global list */
static inline void insert_change( struct change *change )
{
sigset_t sigset;
sigemptyset( &sigset );
sigaddset( &sigset, SIGIO );
sigprocmask( SIG_BLOCK, &sigset, NULL );
list_add_head( &change_list, &change->entry );
sigprocmask( SIG_UNBLOCK, &sigset, NULL );
}
/* remove change from the global list */
static inline void remove_change( struct change *change )
{
sigset_t sigset;
sigemptyset( &sigset );
sigaddset( &sigset, SIGIO );
sigprocmask( SIG_BLOCK, &sigset, NULL );
list_remove( &change->entry );
sigprocmask( SIG_UNBLOCK, &sigset, NULL );
}
static struct change *create_change_notification( struct fd *fd, int subtree, unsigned int filter )
{
struct change *change;
if ((change = alloc_object( &change_ops )))
{
change->fd = (struct fd *)grab_object( fd );
change->subtree = subtree;
change->filter = filter;
change->notified = 0;
change->signaled = 0;
insert_change( change );
adjust_changes( get_unix_fd(fd), filter );
}
return change;
}
@ -66,27 +133,88 @@ static void change_dump( struct object *obj, int verbose )
{
struct change *change = (struct change *)obj;
assert( obj->ops == &change_ops );
fprintf( stderr, "Change notification sub=%d filter=%08x\n",
change->subtree, change->filter );
fprintf( stderr, "Change notification fd=%p sub=%d filter=%08x\n",
change->fd, change->subtree, change->filter );
}
static int change_signaled( struct object *obj, struct thread *thread )
{
/* struct change *change = (struct change *)obj;*/
assert( obj->ops == &change_ops );
return 0; /* never signaled for now */
struct change *change = (struct change *)obj;
return change->signaled != 0;
}
static void change_destroy( struct object *obj )
{
struct change *change = (struct change *)obj;
release_object( change->fd );
remove_change( change );
}
/* enter here directly from SIGIO signal handler */
void do_change_notify( int unix_fd )
{
struct list *ptr;
/* FIXME: this is O(n) ... probably can be improved */
LIST_FOR_EACH( ptr, &change_list )
{
struct change *change = LIST_ENTRY( ptr, struct change, entry );
if (get_unix_fd( change->fd ) != unix_fd) continue;
interlocked_xchg_add( &change->notified, 1 );
break;
}
}
/* SIGIO callback, called synchronously with the poll loop */
void sigio_callback(void)
{
struct list *ptr;
LIST_FOR_EACH( ptr, &change_list )
{
struct change *change = LIST_ENTRY( ptr, struct change, entry );
long count = interlocked_xchg( &change->notified, 0 );
if (count)
{
change->signaled += count;
if (change->signaled == count) /* was it 0? */
wake_up( &change->obj, 0 );
}
}
}
/* create a change notification */
DECL_HANDLER(create_change_notification)
{
struct change *change;
struct file *file;
struct fd *fd;
reply->handle = 0;
if ((change = create_change_notification( req->subtree, req->filter )))
if (!(file = get_file_obj( current->process, req->handle, 0 ))) return;
fd = get_obj_fd( (struct object *)file );
release_object( file );
if (!fd) return;
if ((change = create_change_notification( fd, req->subtree, req->filter )))
{
reply->handle = alloc_handle( current->process, change,
STANDARD_RIGHTS_REQUIRED|SYNCHRONIZE, 0 );
release_object( change );
}
release_object( fd );
}
/* move to the next change notification */
DECL_HANDLER(next_change_notification)
{
struct change *change;
if ((change = (struct change *)get_handle_obj( current->process, req->handle,
0, &change_ops )))
{
if (change->signaled > 0) change->signaled--;
release_object( change );
}
}

2
server/file.c
View File

@ -221,7 +221,7 @@ static struct file *create_file( const char *nameptr, size_t len, unsigned int a
return NULL;
}
/* refuse to open a directory */
if (S_ISDIR(mode))
if (S_ISDIR(mode) && !(file->flags & FILE_FLAG_BACKUP_SEMANTICS))
{
set_error( STATUS_ACCESS_DENIED );
release_object( file );

5
server/file.h
View File

@ -95,4 +95,9 @@ extern int grow_file( struct file *file, int size_high, int size_low );
extern struct file *create_temp_file( int access );
extern void file_set_error(void);
/* change notification functions */
extern void do_change_notify( int unix_fd );
extern void sigio_callback(void);
#endif /* __WINE_SERVER_FILE_H */

8
server/protocol.def
View File

@ -1055,13 +1055,19 @@ enum char_info_mode
/* Create a change notification */
@REQ(create_change_notification)
obj_handle_t handle; /* handle to the directory */
int subtree; /* watch all the subtree */
int filter; /* notification filter */
unsigned int filter; /* notification filter */
@REPLY
obj_handle_t handle; /* handle to the change notification */
@END
/* Move to the next change notification */
@REQ(next_change_notification)
obj_handle_t handle; /* handle to the change notification */
@END
/* Create a file mapping */
@REQ(create_mapping)
int size_high; /* mapping size */

2
server/request.h
View File

@ -177,6 +177,7 @@ DECL_HANDLER(read_console_output);
DECL_HANDLER(move_console_output);
DECL_HANDLER(send_console_signal);
DECL_HANDLER(create_change_notification);
DECL_HANDLER(next_change_notification);
DECL_HANDLER(create_mapping);
DECL_HANDLER(open_mapping);
DECL_HANDLER(get_mapping_info);
@ -357,6 +358,7 @@ static const req_handler req_handlers[REQ_NB_REQUESTS] =
(req_handler)req_move_console_output,
(req_handler)req_send_console_signal,
(req_handler)req_create_change_notification,
(req_handler)req_next_change_notification,
(req_handler)req_create_mapping,
(req_handler)req_open_mapping,
(req_handler)req_get_mapping_info,

8
server/signal.c
View File

@ -170,12 +170,6 @@ static void sigint_callback(void)
exit(1);
}
/* SIGIO callback */
static void sigio_callback(void)
{
/* nothing here yet */
}
/* SIGHUP handler */
static void do_sighup()
{
@ -203,8 +197,8 @@ static void do_sigchld()
/* SIGIO handler */
static void do_sigio( int signum, siginfo_t *si, void *x )
{
/* do_change_notify( si->si_fd ); */
do_signal( handler_sigio );
do_change_notify( si->si_fd );
}
void init_signals(void)

11
server/trace.c
View File

@ -1241,8 +1241,9 @@ static void dump_send_console_signal_request( const struct send_console_signal_r
static void dump_create_change_notification_request( const struct create_change_notification_request *req )
{
fprintf( stderr, " handle=%p,", req->handle );
fprintf( stderr, " subtree=%d,", req->subtree );
fprintf( stderr, " filter=%d", req->filter );
fprintf( stderr, " filter=%08x", req->filter );
}
static void dump_create_change_notification_reply( const struct create_change_notification_reply *req )
@ -1250,6 +1251,11 @@ static void dump_create_change_notification_reply( const struct create_change_no
fprintf( stderr, " handle=%p", req->handle );
}
static void dump_next_change_notification_request( const struct next_change_notification_request *req )
{
fprintf( stderr, " handle=%p", req->handle );
}
static void dump_create_mapping_request( const struct create_mapping_request *req )
{
fprintf( stderr, " size_high=%d,", req->size_high );
@ -2495,6 +2501,7 @@ static const dump_func req_dumpers[REQ_NB_REQUESTS] = {
(dump_func)dump_move_console_output_request,
(dump_func)dump_send_console_signal_request,
(dump_func)dump_create_change_notification_request,
(dump_func)dump_next_change_notification_request,
(dump_func)dump_create_mapping_request,
(dump_func)dump_open_mapping_request,
(dump_func)dump_get_mapping_info_request,
@ -2672,6 +2679,7 @@ static const dump_func reply_dumpers[REQ_NB_REQUESTS] = {
(dump_func)0,
(dump_func)0,
(dump_func)dump_create_change_notification_reply,
(dump_func)0,
(dump_func)dump_create_mapping_reply,
(dump_func)dump_open_mapping_reply,
(dump_func)dump_get_mapping_info_reply,
@ -2849,6 +2857,7 @@ static const char * const req_names[REQ_NB_REQUESTS] = {
"move_console_output",
"send_console_signal",
"create_change_notification",
"next_change_notification",
"create_mapping",
"open_mapping",
"get_mapping_info",