2 * Server-side file management
4 * Copyright (C) 1998 Alexandre Julliard
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
22 #include "wine/port.h"
31 #ifdef HAVE_SYS_ERRNO_H
32 #include <sys/errno.h>
36 #include <sys/types.h>
47 #define WIN32_NO_STATUS
58 struct object obj
; /* object header */
59 struct fd
*fd
; /* file descriptor for this file */
60 unsigned int access
; /* file access (FILE_READ_DATA etc.) */
63 static unsigned int generic_file_map_access( unsigned int access
);
65 static void file_dump( struct object
*obj
, int verbose
);
66 static struct fd
*file_get_fd( struct object
*obj
);
67 static unsigned int file_map_access( struct object
*obj
, unsigned int access
);
68 static void file_destroy( struct object
*obj
);
70 static int file_get_poll_events( struct fd
*fd
);
71 static void file_flush( struct fd
*fd
, struct event
**event
);
72 static enum server_fd_type
file_get_fd_type( struct fd
*fd
);
74 static const struct object_ops file_ops
=
76 sizeof(struct file
), /* size */
78 add_queue
, /* add_queue */
79 remove_queue
, /* remove_queue */
80 default_fd_signaled
, /* signaled */
81 no_satisfied
, /* satisfied */
82 no_signal
, /* signal */
83 file_get_fd
, /* get_fd */
84 file_map_access
, /* map_access */
85 no_lookup_name
, /* lookup_name */
86 no_open_file
, /* open_file */
87 fd_close_handle
, /* close_handle */
88 file_destroy
/* destroy */
91 static const struct fd_ops file_fd_ops
=
93 file_get_poll_events
, /* get_poll_events */
94 default_poll_event
, /* poll_event */
95 file_flush
, /* flush */
96 file_get_fd_type
, /* get_fd_type */
97 default_fd_ioctl
, /* ioctl */
98 default_fd_queue_async
, /* queue_async */
99 default_fd_reselect_async
, /* reselect_async */
100 default_fd_cancel_async
/* cancel_async */
103 static inline int is_overlapped( const struct file
*file
)
105 return !(get_fd_options( file
->fd
) & (FILE_SYNCHRONOUS_IO_ALERT
| FILE_SYNCHRONOUS_IO_NONALERT
));
108 /* create a file from a file descriptor */
109 /* if the function fails the fd is closed */
110 static struct file
*create_file_for_fd( int fd
, unsigned int access
, unsigned int sharing
)
114 if ((file
= alloc_object( &file_ops
)))
116 file
->access
= file_map_access( &file
->obj
, access
);
117 if (!(file
->fd
= create_anonymous_fd( &file_fd_ops
, fd
, &file
->obj
,
118 FILE_SYNCHRONOUS_IO_NONALERT
)))
120 release_object( file
);
127 static struct object
*create_file_obj( struct fd
*fd
, unsigned int access
)
129 struct file
*file
= alloc_object( &file_ops
);
131 if (!file
) return NULL
;
132 file
->access
= access
;
135 set_fd_user( fd
, &file_fd_ops
, &file
->obj
);
139 static struct object
*create_file( const char *nameptr
, data_size_t len
, unsigned int access
,
140 unsigned int sharing
, int create
, unsigned int options
,
143 struct object
*obj
= NULL
;
149 if (!(name
= mem_alloc( len
+ 1 ))) return NULL
;
150 memcpy( name
, nameptr
, len
);
155 case FILE_CREATE
: flags
= O_CREAT
| O_EXCL
; break;
156 case FILE_OVERWRITE_IF
: /* FIXME: the difference is whether we trash existing attr or not */
157 case FILE_SUPERSEDE
: flags
= O_CREAT
| O_TRUNC
; break;
158 case FILE_OPEN
: flags
= 0; break;
159 case FILE_OPEN_IF
: flags
= O_CREAT
; break;
160 case FILE_OVERWRITE
: flags
= O_TRUNC
; break;
161 default: set_error( STATUS_INVALID_PARAMETER
); goto done
;
164 mode
= (attrs
& FILE_ATTRIBUTE_READONLY
) ? 0444 : 0666;
167 (!strcasecmp( name
+ len
- 4, ".exe" ) || !strcasecmp( name
+ len
- 4, ".com" )))
170 access
= generic_file_map_access( access
);
172 /* FIXME: should set error to STATUS_OBJECT_NAME_COLLISION if file existed before */
173 fd
= open_fd( name
, flags
| O_NONBLOCK
| O_LARGEFILE
, &mode
, access
, sharing
, options
);
177 obj
= create_dir_obj( fd
);
178 else if (S_ISCHR(mode
) && is_serial_fd( fd
))
179 obj
= create_serial( fd
);
181 obj
= create_file_obj( fd
, access
);
183 release_object( fd
);
190 /* check if two file objects point to the same file */
191 int is_same_file( struct file
*file1
, struct file
*file2
)
193 return is_same_file_fd( file1
->fd
, file2
->fd
);
196 /* create a temp file for anonymous mappings */
197 struct file
*create_temp_file( int access
)
202 sprintf( tmpfn
, "anonmap.XXXXXX" ); /* create it in the server directory */
203 fd
= mkstemps( tmpfn
, 0 );
210 return create_file_for_fd( fd
, access
, 0 );
213 static void file_dump( struct object
*obj
, int verbose
)
215 struct file
*file
= (struct file
*)obj
;
216 assert( obj
->ops
== &file_ops
);
217 fprintf( stderr
, "File fd=%p\n", file
->fd
);
220 static int file_get_poll_events( struct fd
*fd
)
222 struct file
*file
= get_fd_user( fd
);
224 assert( file
->obj
.ops
== &file_ops
);
225 if (file
->access
& FILE_UNIX_READ_ACCESS
) events
|= POLLIN
;
226 if (file
->access
& FILE_UNIX_WRITE_ACCESS
) events
|= POLLOUT
;
230 static void file_flush( struct fd
*fd
, struct event
**event
)
232 int unix_fd
= get_unix_fd( fd
);
233 if (unix_fd
!= -1 && fsync( unix_fd
) == -1) file_set_error();
236 static enum server_fd_type
file_get_fd_type( struct fd
*fd
)
241 static struct fd
*file_get_fd( struct object
*obj
)
243 struct file
*file
= (struct file
*)obj
;
244 assert( obj
->ops
== &file_ops
);
245 return (struct fd
*)grab_object( file
->fd
);
248 static unsigned int generic_file_map_access( unsigned int access
)
250 if (access
& GENERIC_READ
) access
|= FILE_GENERIC_READ
;
251 if (access
& GENERIC_WRITE
) access
|= FILE_GENERIC_WRITE
;
252 if (access
& GENERIC_EXECUTE
) access
|= FILE_GENERIC_EXECUTE
;
253 if (access
& GENERIC_ALL
) access
|= FILE_ALL_ACCESS
;
254 return access
& ~(GENERIC_READ
| GENERIC_WRITE
| GENERIC_EXECUTE
| GENERIC_ALL
);
257 static unsigned int file_map_access( struct object
*obj
, unsigned int access
)
259 return generic_file_map_access( access
);
262 static void file_destroy( struct object
*obj
)
264 struct file
*file
= (struct file
*)obj
;
265 assert( obj
->ops
== &file_ops
);
267 if (file
->fd
) release_object( file
->fd
);
270 /* set the last error depending on errno */
271 void file_set_error(void)
275 case EAGAIN
: set_error( STATUS_SHARING_VIOLATION
); break;
276 case EBADF
: set_error( STATUS_INVALID_HANDLE
); break;
277 case ENOSPC
: set_error( STATUS_DISK_FULL
); break;
280 case EPERM
: set_error( STATUS_ACCESS_DENIED
); break;
281 case EROFS
: set_error( STATUS_MEDIA_WRITE_PROTECTED
); break;
282 case EBUSY
: set_error( STATUS_FILE_LOCK_CONFLICT
); break;
283 case ENOENT
: set_error( STATUS_NO_SUCH_FILE
); break;
284 case EISDIR
: set_error( STATUS_FILE_IS_A_DIRECTORY
); break;
286 case EMFILE
: set_error( STATUS_TOO_MANY_OPENED_FILES
); break;
287 case EEXIST
: set_error( STATUS_OBJECT_NAME_COLLISION
); break;
288 case EINVAL
: set_error( STATUS_INVALID_PARAMETER
); break;
289 case ESPIPE
: set_error( STATUS_ILLEGAL_FUNCTION
); break;
290 case ENOTEMPTY
: set_error( STATUS_DIRECTORY_NOT_EMPTY
); break;
291 case EIO
: set_error( STATUS_ACCESS_VIOLATION
); break;
292 case ENOTDIR
: set_error( STATUS_NOT_A_DIRECTORY
); break;
293 case EFBIG
: set_error( STATUS_SECTION_TOO_BIG
); break;
294 case ENODEV
: set_error( STATUS_NO_SUCH_DEVICE
); break;
295 case ENXIO
: set_error( STATUS_NO_SUCH_DEVICE
); break;
297 case EOVERFLOW
: set_error( STATUS_INVALID_PARAMETER
); break;
299 default: perror("file_set_error"); set_error( STATUS_UNSUCCESSFUL
); break;
303 struct file
*get_file_obj( struct process
*process
, obj_handle_t handle
, unsigned int access
)
305 return (struct file
*)get_handle_obj( process
, handle
, access
, &file_ops
);
308 int get_file_unix_fd( struct file
*file
)
310 return get_unix_fd( file
->fd
);
313 struct file
*grab_file_unless_removable( struct file
*file
)
315 if (is_fd_removable( file
->fd
)) return NULL
;
316 return (struct file
*)grab_object( file
);
319 /* extend a file beyond the current end of file */
320 static int extend_file( struct file
*file
, file_pos_t new_size
)
322 static const char zero
;
323 int unix_fd
= get_file_unix_fd( file
);
324 off_t size
= new_size
;
326 if (unix_fd
== -1) return 0;
328 if (sizeof(new_size
) > sizeof(size
) && size
!= new_size
)
330 set_error( STATUS_INVALID_PARAMETER
);
333 /* extend the file one byte beyond the requested size and then truncate it */
334 /* this should work around ftruncate implementations that can't extend files */
335 if (pwrite( unix_fd
, &zero
, 1, size
) != -1)
337 ftruncate( unix_fd
, size
);
344 /* try to grow the file to the specified size */
345 int grow_file( struct file
*file
, file_pos_t size
)
348 int unix_fd
= get_file_unix_fd( file
);
350 if (unix_fd
== -1) return 0;
352 if (fstat( unix_fd
, &st
) == -1)
357 if (st
.st_size
>= size
) return 1; /* already large enough */
358 return extend_file( file
, size
);
362 DECL_HANDLER(create_file
)
367 if ((file
= create_file( get_req_data(), get_req_data_size(), req
->access
,
368 req
->sharing
, req
->create
, req
->options
, req
->attrs
)))
370 reply
->handle
= alloc_handle( current
->process
, file
, req
->access
, req
->attributes
);
371 release_object( file
);
375 /* allocate a file handle for a Unix fd */
376 DECL_HANDLER(alloc_file_handle
)
382 if ((fd
= thread_get_inflight_fd( current
, req
->fd
)) == -1)
384 set_error( STATUS_INVALID_HANDLE
);
387 if ((file
= create_file_for_fd( fd
, req
->access
, FILE_SHARE_READ
| FILE_SHARE_WRITE
)))
389 reply
->handle
= alloc_handle( current
->process
, file
, req
->access
, req
->attributes
);
390 release_object( file
);
394 /* lock a region of a file */
395 DECL_HANDLER(lock_file
)
398 file_pos_t offset
= ((file_pos_t
)req
->offset_high
<< 32) | req
->offset_low
;
399 file_pos_t count
= ((file_pos_t
)req
->count_high
<< 32) | req
->count_low
;
401 if ((file
= get_file_obj( current
->process
, req
->handle
, 0 )))
403 reply
->handle
= lock_fd( file
->fd
, offset
, count
, req
->shared
, req
->wait
);
404 reply
->overlapped
= is_overlapped( file
);
405 release_object( file
);
409 /* unlock a region of a file */
410 DECL_HANDLER(unlock_file
)
413 file_pos_t offset
= ((file_pos_t
)req
->offset_high
<< 32) | req
->offset_low
;
414 file_pos_t count
= ((file_pos_t
)req
->count_high
<< 32) | req
->count_low
;
416 if ((file
= get_file_obj( current
->process
, req
->handle
, 0 )))
418 unlock_fd( file
->fd
, offset
, count
);
419 release_object( file
);