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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include "wine/port.h"
31 #ifdef HAVE_SYS_ERRNO_H
32 #include <sys/errno.h>
36 #include <sys/types.h>
56 struct object obj
; /* object header */
57 struct fd
*fd
; /* file descriptor for this file */
58 unsigned int access
; /* file access (GENERIC_READ/WRITE) */
59 unsigned int options
; /* file options (FILE_DELETE_ON_CLOSE, FILE_SYNCHRONOUS...) */
62 static void file_dump( struct object
*obj
, int verbose
);
63 static struct fd
*file_get_fd( struct object
*obj
);
64 static void file_destroy( struct object
*obj
);
66 static int file_get_poll_events( struct fd
*fd
);
67 static int file_flush( struct fd
*fd
, struct event
**event
);
68 static int file_get_info( struct fd
*fd
);
70 static const struct object_ops file_ops
=
72 sizeof(struct file
), /* size */
74 default_fd_add_queue
, /* add_queue */
75 default_fd_remove_queue
, /* remove_queue */
76 default_fd_signaled
, /* signaled */
77 no_satisfied
, /* satisfied */
78 no_signal
, /* signal */
79 file_get_fd
, /* get_fd */
80 no_lookup_name
, /* lookup_name */
81 no_close_handle
, /* close_handle */
82 file_destroy
/* destroy */
85 static const struct fd_ops file_fd_ops
=
87 file_get_poll_events
, /* get_poll_events */
88 default_poll_event
, /* poll_event */
89 file_flush
, /* flush */
90 file_get_info
, /* get_file_info */
91 default_fd_queue_async
, /* queue_async */
92 default_fd_cancel_async
/* cancel_async */
95 static inline int is_overlapped( const struct file
*file
)
97 return !(file
->options
& (FILE_SYNCHRONOUS_IO_ALERT
| FILE_SYNCHRONOUS_IO_NONALERT
));
100 /* create a file from a file descriptor */
101 /* if the function fails the fd is closed */
102 static struct file
*create_file_for_fd( int fd
, unsigned int access
, unsigned int sharing
)
106 if ((file
= alloc_object( &file_ops
)))
108 file
->access
= access
;
109 file
->options
= FILE_SYNCHRONOUS_IO_NONALERT
;
110 if (!(file
->fd
= create_anonymous_fd( &file_fd_ops
, fd
, &file
->obj
)))
112 release_object( file
);
120 static struct object
*create_file( const char *nameptr
, size_t len
, unsigned int access
,
121 unsigned int sharing
, int create
, unsigned int options
,
129 if (!(name
= mem_alloc( len
+ 1 ))) return NULL
;
130 memcpy( name
, nameptr
, len
);
135 case FILE_CREATE
: flags
= O_CREAT
| O_EXCL
; break;
136 case FILE_OVERWRITE_IF
: /* FIXME: the difference is whether we trash existing attr or not */
137 case FILE_SUPERSEDE
: flags
= O_CREAT
| O_TRUNC
; break;
138 case FILE_OPEN
: flags
= 0; break;
139 case FILE_OPEN_IF
: flags
= O_CREAT
; break;
140 case FILE_OVERWRITE
: flags
= O_TRUNC
; break;
141 default: set_error( STATUS_INVALID_PARAMETER
); goto error
;
144 switch(access
& (GENERIC_READ
| GENERIC_WRITE
))
147 case GENERIC_READ
: flags
|= O_RDONLY
; break;
148 case GENERIC_WRITE
: flags
|= O_WRONLY
; break;
149 case GENERIC_READ
|GENERIC_WRITE
: flags
|= O_RDWR
; break;
151 mode
= (attrs
& FILE_ATTRIBUTE_READONLY
) ? 0444 : 0666;
154 (!strcasecmp( name
+ len
- 4, ".exe" ) || !strcasecmp( name
+ len
- 4, ".com" )))
157 if (!(file
= alloc_object( &file_ops
))) goto error
;
159 file
->access
= access
;
160 file
->options
= options
;
162 /* FIXME: should set error to STATUS_OBJECT_NAME_COLLISION if file existed before */
163 if (!(file
->fd
= alloc_fd( &file_fd_ops
, &file
->obj
)) ||
164 !(file
->fd
= open_fd( file
->fd
, name
, flags
| O_NONBLOCK
| O_LARGEFILE
,
165 &mode
, access
, sharing
, options
)))
168 release_object( file
);
173 /* check for serial port */
174 if (S_ISCHR(mode
) && is_serial_fd( file
->fd
))
176 struct object
*obj
= create_serial( file
->fd
, file
->options
);
177 release_object( file
);
188 /* check if two file objects point to the same file */
189 int is_same_file( struct file
*file1
, struct file
*file2
)
191 return is_same_file_fd( file1
->fd
, file2
->fd
);
194 /* create a temp file for anonymous mappings */
195 struct file
*create_temp_file( int access
)
200 sprintf( tmpfn
, "anonmap.XXXXXX" ); /* create it in the server directory */
201 fd
= mkstemps( tmpfn
, 0 );
208 return create_file_for_fd( fd
, access
, 0 );
211 static void file_dump( struct object
*obj
, int verbose
)
213 struct file
*file
= (struct file
*)obj
;
214 assert( obj
->ops
== &file_ops
);
215 fprintf( stderr
, "File fd=%p options=%08x\n", file
->fd
, file
->options
);
218 static int file_get_poll_events( struct fd
*fd
)
220 struct file
*file
= get_fd_user( fd
);
222 assert( file
->obj
.ops
== &file_ops
);
223 if (file
->access
& GENERIC_READ
) events
|= POLLIN
;
224 if (file
->access
& GENERIC_WRITE
) events
|= POLLOUT
;
228 static int file_flush( struct fd
*fd
, struct event
**event
)
230 int ret
= 0, unix_fd
= get_unix_fd( fd
);
234 ret
= (fsync( unix_fd
) != -1);
235 if (!ret
) file_set_error();
240 static int file_get_info( struct fd
*fd
)
242 struct file
*file
= get_fd_user( fd
);
244 if (is_overlapped( file
)) return FD_FLAG_OVERLAPPED
;
248 static struct fd
*file_get_fd( struct object
*obj
)
250 struct file
*file
= (struct file
*)obj
;
251 assert( obj
->ops
== &file_ops
);
252 return (struct fd
*)grab_object( file
->fd
);
255 static void file_destroy( struct object
*obj
)
257 struct file
*file
= (struct file
*)obj
;
258 assert( obj
->ops
== &file_ops
);
260 if (file
->fd
) release_object( file
->fd
);
263 /* set the last error depending on errno */
264 void file_set_error(void)
268 case EAGAIN
: set_error( STATUS_SHARING_VIOLATION
); break;
269 case EBADF
: set_error( STATUS_INVALID_HANDLE
); break;
270 case ENOSPC
: set_error( STATUS_DISK_FULL
); break;
273 case EPERM
: set_error( STATUS_ACCESS_DENIED
); break;
274 case EROFS
: set_error( STATUS_MEDIA_WRITE_PROTECTED
); break;
275 case EBUSY
: set_error( STATUS_FILE_LOCK_CONFLICT
); break;
276 case ENOENT
: set_error( STATUS_NO_SUCH_FILE
); break;
277 case EISDIR
: set_error( STATUS_FILE_IS_A_DIRECTORY
); break;
279 case EMFILE
: set_error( STATUS_NO_MORE_FILES
); break;
280 case EEXIST
: set_error( STATUS_OBJECT_NAME_COLLISION
); break;
281 case EINVAL
: set_error( STATUS_INVALID_PARAMETER
); break;
282 case ESPIPE
: set_win32_error( ERROR_SEEK
); break;
283 case ENOTEMPTY
: set_error( STATUS_DIRECTORY_NOT_EMPTY
); break;
284 case EIO
: set_error( STATUS_ACCESS_VIOLATION
); break;
285 case ENOTDIR
: set_error( STATUS_NOT_A_DIRECTORY
); break;
286 case EFBIG
: set_error( STATUS_SECTION_TOO_BIG
); break;
287 case ENODEV
: set_error( STATUS_NO_SUCH_DEVICE
); break;
288 case ENXIO
: set_error( STATUS_NO_SUCH_DEVICE
); break;
290 case EOVERFLOW
: set_error( STATUS_INVALID_PARAMETER
); break;
292 default: perror("file_set_error"); set_error( STATUS_UNSUCCESSFUL
); break;
296 struct file
*get_file_obj( struct process
*process
, obj_handle_t handle
, unsigned int access
)
298 return (struct file
*)get_handle_obj( process
, handle
, access
, &file_ops
);
301 int get_file_unix_fd( struct file
*file
)
303 return get_unix_fd( file
->fd
);
306 /* extend a file beyond the current end of file */
307 static int extend_file( struct file
*file
, file_pos_t new_size
)
309 static const char zero
;
310 int unix_fd
= get_file_unix_fd( file
);
311 off_t size
= new_size
;
313 if (unix_fd
== -1) return 0;
315 if (sizeof(new_size
) > sizeof(size
) && size
!= new_size
)
317 set_error( STATUS_INVALID_PARAMETER
);
320 /* extend the file one byte beyond the requested size and then truncate it */
321 /* this should work around ftruncate implementations that can't extend files */
322 if (pwrite( unix_fd
, &zero
, 1, size
) != -1)
324 ftruncate( unix_fd
, size
);
331 /* try to grow the file to the specified size */
332 int grow_file( struct file
*file
, file_pos_t size
)
335 int unix_fd
= get_file_unix_fd( file
);
337 if (unix_fd
== -1) return 0;
339 if (fstat( unix_fd
, &st
) == -1)
344 if (st
.st_size
>= size
) return 1; /* already large enough */
345 return extend_file( file
, size
);
349 DECL_HANDLER(create_file
)
354 if ((file
= create_file( get_req_data(), get_req_data_size(), req
->access
,
355 req
->sharing
, req
->create
, req
->options
, req
->attrs
)))
357 reply
->handle
= alloc_handle( current
->process
, file
, req
->access
, req
->inherit
);
358 release_object( file
);
362 /* allocate a file handle for a Unix fd */
363 DECL_HANDLER(alloc_file_handle
)
369 if ((fd
= thread_get_inflight_fd( current
, req
->fd
)) == -1)
371 set_error( STATUS_INVALID_HANDLE
);
374 if ((file
= create_file_for_fd( fd
, req
->access
, FILE_SHARE_READ
| FILE_SHARE_WRITE
)))
376 reply
->handle
= alloc_handle( current
->process
, file
, req
->access
, req
->inherit
);
377 release_object( file
);
381 /* lock a region of a file */
382 DECL_HANDLER(lock_file
)
385 file_pos_t offset
= ((file_pos_t
)req
->offset_high
<< 32) | req
->offset_low
;
386 file_pos_t count
= ((file_pos_t
)req
->count_high
<< 32) | req
->count_low
;
388 if ((file
= get_file_obj( current
->process
, req
->handle
, 0 )))
390 reply
->handle
= lock_fd( file
->fd
, offset
, count
, req
->shared
, req
->wait
);
391 reply
->overlapped
= is_overlapped( file
);
392 release_object( file
);
396 /* unlock a region of a file */
397 DECL_HANDLER(unlock_file
)
400 file_pos_t offset
= ((file_pos_t
)req
->offset_high
<< 32) | req
->offset_low
;
401 file_pos_t count
= ((file_pos_t
)req
->count_high
<< 32) | req
->count_low
;
403 if ((file
= get_file_obj( current
->process
, req
->handle
, 0 )))
405 unlock_fd( file
->fd
, offset
, count
);
406 release_object( file
);