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>
59 struct object obj; /* object header */
60 struct fd *fd; /* file descriptor for this file */
61 unsigned int access; /* file access (GENERIC_READ/WRITE) */
62 unsigned int options; /* file options (FILE_DELETE_ON_CLOSE, FILE_SYNCHRONOUS...) */
67 static void file_dump( struct object *obj, int verbose );
68 static struct fd *file_get_fd( struct object *obj );
69 static void file_destroy( struct object *obj );
71 static int file_get_poll_events( struct fd *fd );
72 static void file_poll_event( struct fd *fd, int event );
73 static int file_flush( struct fd *fd, struct event **event );
74 static int file_get_info( struct fd *fd );
75 static void file_queue_async( struct fd *fd, void *apc, void *user, void* iosb, int type, int count );
76 static void file_cancel_async( struct fd *fd );
78 static const struct object_ops file_ops =
80 sizeof(struct file), /* size */
82 default_fd_add_queue, /* add_queue */
83 default_fd_remove_queue, /* remove_queue */
84 default_fd_signaled, /* signaled */
85 no_satisfied, /* satisfied */
86 no_signal, /* signal */
87 file_get_fd, /* get_fd */
88 file_destroy /* destroy */
91 static const struct fd_ops file_fd_ops =
93 file_get_poll_events, /* get_poll_events */
94 file_poll_event, /* poll_event */
95 file_flush, /* flush */
96 file_get_info, /* get_file_info */
97 file_queue_async, /* queue_async */
98 file_cancel_async /* cancel_async */
101 static inline int is_overlapped( const struct file *file )
103 return !(file->options & (FILE_SYNCHRONOUS_IO_ALERT | FILE_SYNCHRONOUS_IO_NONALERT));
106 /* create a file from a file descriptor */
107 /* if the function fails the fd is closed */
108 static struct file *create_file_for_fd( int fd, unsigned int access, unsigned int sharing )
112 if ((file = alloc_object( &file_ops )))
114 file->access = access;
115 file->options = FILE_SYNCHRONOUS_IO_NONALERT;
116 if (!(file->fd = create_anonymous_fd( &file_fd_ops, fd, &file->obj )))
118 release_object( file );
126 static struct object *create_file( const char *nameptr, size_t len, unsigned int access,
127 unsigned int sharing, int create, unsigned int options,
135 if (!(name = mem_alloc( len + 1 ))) return NULL;
136 memcpy( name, nameptr, len );
141 case FILE_CREATE: flags = O_CREAT | O_EXCL; break;
142 case FILE_OVERWRITE_IF: /* FIXME: the difference is whether we trash existing attr or not */
143 case FILE_SUPERSEDE: flags = O_CREAT | O_TRUNC; break;
144 case FILE_OPEN: flags = 0; break;
145 case FILE_OPEN_IF: flags = O_CREAT; break;
146 case FILE_OVERWRITE: flags = O_TRUNC; break;
147 default: set_error( STATUS_INVALID_PARAMETER ); goto error;
150 switch(access & (GENERIC_READ | GENERIC_WRITE))
153 case GENERIC_READ: flags |= O_RDONLY; break;
154 case GENERIC_WRITE: flags |= O_WRONLY; break;
155 case GENERIC_READ|GENERIC_WRITE: flags |= O_RDWR; break;
157 mode = (attrs & FILE_ATTRIBUTE_READONLY) ? 0444 : 0666;
160 (!strcasecmp( name + len - 4, ".exe" ) || !strcasecmp( name + len - 4, ".com" )))
163 if (!(file = alloc_object( &file_ops ))) goto error;
165 file->access = access;
166 file->options = options;
167 list_init( &file->read_q );
168 list_init( &file->write_q );
170 /* FIXME: should set error to STATUS_OBJECT_NAME_COLLISION if file existed before */
171 if (!(file->fd = alloc_fd( &file_fd_ops, &file->obj )) ||
172 !(file->fd = open_fd( file->fd, name, flags | O_NONBLOCK | O_LARGEFILE,
173 &mode, access, sharing, options )))
176 release_object( file );
181 /* check for serial port */
182 if (S_ISCHR(mode) && is_serial_fd( file->fd ))
184 struct object *obj = create_serial( file->fd, file->options );
185 release_object( file );
196 /* check if two file objects point to the same file */
197 int is_same_file( struct file *file1, struct file *file2 )
199 return is_same_file_fd( file1->fd, file2->fd );
202 /* create a temp file for anonymous mappings */
203 struct file *create_temp_file( int access )
208 sprintf( tmpfn, "anonmap.XXXXXX" ); /* create it in the server directory */
209 fd = mkstemps( tmpfn, 0 );
216 return create_file_for_fd( fd, access, 0 );
219 static void file_dump( struct object *obj, int verbose )
221 struct file *file = (struct file *)obj;
222 assert( obj->ops == &file_ops );
223 fprintf( stderr, "File fd=%p options=%08x\n", file->fd, file->options );
226 static int file_get_poll_events( struct fd *fd )
228 struct file *file = get_fd_user( fd );
230 assert( file->obj.ops == &file_ops );
231 if (file->access & GENERIC_READ) events |= POLLIN;
232 if (file->access & GENERIC_WRITE) events |= POLLOUT;
236 static void file_poll_event( struct fd *fd, int event )
238 struct file *file = get_fd_user( fd );
239 assert( file->obj.ops == &file_ops );
240 if (is_overlapped( file ))
242 if (!list_empty( &file->read_q ) && (POLLIN & event) )
244 async_terminate_head( &file->read_q, STATUS_ALERTED );
247 if (!list_empty( &file->write_q ) && (POLLOUT & event) )
249 async_terminate_head( &file->write_q, STATUS_ALERTED );
253 default_poll_event( fd, event );
257 static int file_flush( struct fd *fd, struct event **event )
259 int ret = (fsync( get_unix_fd(fd) ) != -1);
260 if (!ret) file_set_error();
264 static int file_get_info( struct fd *fd )
266 struct file *file = get_fd_user( fd );
268 if (is_overlapped( file )) return FD_FLAG_OVERLAPPED;
272 static void file_queue_async( struct fd *fd, void *apc, void *user, void *iosb,
273 int type, int count )
275 struct file *file = get_fd_user( fd );
279 assert( file->obj.ops == &file_ops );
281 if (!is_overlapped( file ))
283 set_error( STATUS_INVALID_HANDLE );
289 case ASYNC_TYPE_READ:
290 queue = &file->read_q;
292 case ASYNC_TYPE_WRITE:
293 queue = &file->write_q;
296 set_error( STATUS_INVALID_PARAMETER );
300 if (!create_async( current, 0, queue, apc, user, iosb ))
303 /* Check if the new pending request can be served immediately */
304 events = check_fd_events( fd, file_get_poll_events( fd ) );
305 if (events) file_poll_event( fd, events );
307 set_fd_events( fd, file_get_poll_events( fd ));
310 static void file_cancel_async( struct fd *fd )
312 struct file *file = get_fd_user( fd );
313 assert( file->obj.ops == &file_ops );
315 async_terminate_queue( &file->read_q, STATUS_CANCELLED );
316 async_terminate_queue( &file->write_q, STATUS_CANCELLED );
319 static struct fd *file_get_fd( struct object *obj )
321 struct file *file = (struct file *)obj;
322 assert( obj->ops == &file_ops );
323 return (struct fd *)grab_object( file->fd );
326 static void file_destroy( struct object *obj )
328 struct file *file = (struct file *)obj;
329 assert( obj->ops == &file_ops );
331 if (is_overlapped( file ))
333 async_terminate_queue( &file->read_q, STATUS_CANCELLED );
334 async_terminate_queue( &file->write_q, STATUS_CANCELLED );
336 if (file->fd) release_object( file->fd );
339 /* set the last error depending on errno */
340 void file_set_error(void)
344 case EAGAIN: set_error( STATUS_SHARING_VIOLATION ); break;
345 case EBADF: set_error( STATUS_INVALID_HANDLE ); break;
346 case ENOSPC: set_error( STATUS_DISK_FULL ); break;
349 case EPERM: set_error( STATUS_ACCESS_DENIED ); break;
350 case EROFS: set_error( STATUS_MEDIA_WRITE_PROTECTED ); break;
351 case EBUSY: set_error( STATUS_FILE_LOCK_CONFLICT ); break;
352 case ENOENT: set_error( STATUS_NO_SUCH_FILE ); break;
353 case EISDIR: set_error( STATUS_FILE_IS_A_DIRECTORY ); break;
355 case EMFILE: set_error( STATUS_NO_MORE_FILES ); break;
356 case EEXIST: set_error( STATUS_OBJECT_NAME_COLLISION ); break;
357 case EINVAL: set_error( STATUS_INVALID_PARAMETER ); break;
358 case ESPIPE: set_win32_error( ERROR_SEEK ); break;
359 case ENOTEMPTY: set_error( STATUS_DIRECTORY_NOT_EMPTY ); break;
360 case EIO: set_error( STATUS_ACCESS_VIOLATION ); break;
361 case ENOTDIR: set_error( STATUS_NOT_A_DIRECTORY ); break;
362 case EFBIG: set_error( STATUS_SECTION_TOO_BIG ); break;
363 case ENODEV: set_error( STATUS_NO_SUCH_DEVICE ); break;
364 case ENXIO: set_error( STATUS_NO_SUCH_DEVICE ); break;
366 case EOVERFLOW: set_error( STATUS_INVALID_PARAMETER ); break;
368 default: perror("file_set_error"); set_error( STATUS_UNSUCCESSFUL ); break;
372 struct file *get_file_obj( struct process *process, obj_handle_t handle, unsigned int access )
374 return (struct file *)get_handle_obj( process, handle, access, &file_ops );
377 int get_file_unix_fd( struct file *file )
379 return get_unix_fd( file->fd );
382 /* extend a file beyond the current end of file */
383 static int extend_file( struct file *file, file_pos_t new_size )
385 static const char zero;
386 int unix_fd = get_file_unix_fd( file );
387 off_t size = new_size;
389 if (sizeof(new_size) > sizeof(size) && size != new_size)
391 set_error( STATUS_INVALID_PARAMETER );
394 /* extend the file one byte beyond the requested size and then truncate it */
395 /* this should work around ftruncate implementations that can't extend files */
396 if (pwrite( unix_fd, &zero, 1, size ) != -1)
398 ftruncate( unix_fd, size );
405 /* try to grow the file to the specified size */
406 int grow_file( struct file *file, file_pos_t size )
409 int unix_fd = get_file_unix_fd( file );
411 if (fstat( unix_fd, &st ) == -1)
416 if (st.st_size >= size) return 1; /* already large enough */
417 return extend_file( file, size );
421 DECL_HANDLER(create_file)
426 if ((file = create_file( get_req_data(), get_req_data_size(), req->access,
427 req->sharing, req->create, req->options, req->attrs )))
429 reply->handle = alloc_handle( current->process, file, req->access, req->inherit );
430 release_object( file );
434 /* allocate a file handle for a Unix fd */
435 DECL_HANDLER(alloc_file_handle)
441 if ((fd = thread_get_inflight_fd( current, req->fd )) == -1)
443 set_error( STATUS_INVALID_HANDLE );
446 if ((file = create_file_for_fd( fd, req->access, FILE_SHARE_READ | FILE_SHARE_WRITE )))
448 reply->handle = alloc_handle( current->process, file, req->access, req->inherit );
449 release_object( file );
453 /* lock a region of a file */
454 DECL_HANDLER(lock_file)
457 file_pos_t offset = ((file_pos_t)req->offset_high << 32) | req->offset_low;
458 file_pos_t count = ((file_pos_t)req->count_high << 32) | req->count_low;
460 if ((file = get_file_obj( current->process, req->handle, 0 )))
462 reply->handle = lock_fd( file->fd, offset, count, req->shared, req->wait );
463 reply->overlapped = is_overlapped( file );
464 release_object( file );
468 /* unlock a region of a file */
469 DECL_HANDLER(unlock_file)
472 file_pos_t offset = ((file_pos_t)req->offset_high << 32) | req->offset_low;
473 file_pos_t count = ((file_pos_t)req->count_high << 32) | req->count_low;
475 if ((file = get_file_obj( current->process, req->handle, 0 )))
477 unlock_fd( file->fd, offset, count );
478 release_object( file );