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.) */
61 mode_t mode; /* file stat.st_mode */
64 static unsigned int generic_file_map_access( unsigned int access );
66 static void file_dump( struct object *obj, int verbose );
67 static struct fd *file_get_fd( struct object *obj );
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 default_fd_map_access, /* map_access */
85 default_get_sd, /* get_sd */
86 default_set_sd, /* set_sd */
87 no_lookup_name, /* lookup_name */
88 no_open_file, /* open_file */
89 fd_close_handle, /* close_handle */
90 file_destroy /* destroy */
93 static const struct fd_ops file_fd_ops =
95 file_get_poll_events, /* get_poll_events */
96 default_poll_event, /* poll_event */
97 file_flush, /* flush */
98 file_get_fd_type, /* get_fd_type */
99 default_fd_ioctl, /* ioctl */
100 default_fd_queue_async, /* queue_async */
101 default_fd_reselect_async, /* reselect_async */
102 default_fd_cancel_async /* cancel_async */
105 static inline int is_overlapped( const struct file *file )
107 return !(get_fd_options( file->fd ) & (FILE_SYNCHRONOUS_IO_ALERT | FILE_SYNCHRONOUS_IO_NONALERT));
110 /* create a file from a file descriptor */
111 /* if the function fails the fd is closed */
112 static struct file *create_file_for_fd( int fd, unsigned int access, unsigned int sharing )
117 if (fstat( fd, &st ) == -1)
123 if ((file = alloc_object( &file_ops )))
125 file->mode = st.st_mode;
126 file->access = default_fd_map_access( &file->obj, access );
127 if (!(file->fd = create_anonymous_fd( &file_fd_ops, fd, &file->obj,
128 FILE_SYNCHRONOUS_IO_NONALERT )))
130 release_object( file );
137 static struct object *create_file_obj( struct fd *fd, unsigned int access, mode_t mode )
139 struct file *file = alloc_object( &file_ops );
141 if (!file) return NULL;
142 file->access = access;
146 set_fd_user( fd, &file_fd_ops, &file->obj );
150 static struct object *create_file( const char *nameptr, data_size_t len, unsigned int access,
151 unsigned int sharing, int create, unsigned int options,
154 struct object *obj = NULL;
160 if (!(name = mem_alloc( len + 1 ))) return NULL;
161 memcpy( name, nameptr, len );
166 case FILE_CREATE: flags = O_CREAT | O_EXCL; break;
167 case FILE_OVERWRITE_IF: /* FIXME: the difference is whether we trash existing attr or not */
168 case FILE_SUPERSEDE: flags = O_CREAT | O_TRUNC; break;
169 case FILE_OPEN: flags = 0; break;
170 case FILE_OPEN_IF: flags = O_CREAT; break;
171 case FILE_OVERWRITE: flags = O_TRUNC; break;
172 default: set_error( STATUS_INVALID_PARAMETER ); goto done;
175 mode = (attrs & FILE_ATTRIBUTE_READONLY) ? 0444 : 0666;
178 (!strcasecmp( name + len - 4, ".exe" ) || !strcasecmp( name + len - 4, ".com" )))
181 access = generic_file_map_access( access );
183 /* FIXME: should set error to STATUS_OBJECT_NAME_COLLISION if file existed before */
184 fd = open_fd( name, flags | O_NONBLOCK | O_LARGEFILE, &mode, access, sharing, options );
188 obj = create_dir_obj( fd );
189 else if (S_ISCHR(mode) && is_serial_fd( fd ))
190 obj = create_serial( fd );
192 obj = create_file_obj( fd, access, mode );
194 release_object( fd );
201 /* check if two file objects point to the same file */
202 int is_same_file( struct file *file1, struct file *file2 )
204 return is_same_file_fd( file1->fd, file2->fd );
207 /* create a temp file for anonymous mappings */
208 struct file *create_temp_file( int access )
213 sprintf( tmpfn, "anonmap.XXXXXX" ); /* create it in the server directory */
214 fd = mkstemps( tmpfn, 0 );
221 return create_file_for_fd( fd, access, 0 );
224 static void file_dump( struct object *obj, int verbose )
226 struct file *file = (struct file *)obj;
227 assert( obj->ops == &file_ops );
228 fprintf( stderr, "File fd=%p\n", file->fd );
231 static int file_get_poll_events( struct fd *fd )
233 struct file *file = get_fd_user( fd );
235 assert( file->obj.ops == &file_ops );
236 if (file->access & FILE_UNIX_READ_ACCESS) events |= POLLIN;
237 if (file->access & FILE_UNIX_WRITE_ACCESS) events |= POLLOUT;
241 static void file_flush( struct fd *fd, struct event **event )
243 int unix_fd = get_unix_fd( fd );
244 if (unix_fd != -1 && fsync( unix_fd ) == -1) file_set_error();
247 static enum server_fd_type file_get_fd_type( struct fd *fd )
249 struct file *file = get_fd_user( fd );
251 if (S_ISREG(file->mode) || S_ISBLK(file->mode)) return FD_TYPE_FILE;
252 if (S_ISDIR(file->mode)) return FD_TYPE_DIR;
256 static struct fd *file_get_fd( struct object *obj )
258 struct file *file = (struct file *)obj;
259 assert( obj->ops == &file_ops );
260 return (struct fd *)grab_object( file->fd );
263 static unsigned int generic_file_map_access( unsigned int access )
265 if (access & GENERIC_READ) access |= FILE_GENERIC_READ;
266 if (access & GENERIC_WRITE) access |= FILE_GENERIC_WRITE;
267 if (access & GENERIC_EXECUTE) access |= FILE_GENERIC_EXECUTE;
268 if (access & GENERIC_ALL) access |= FILE_ALL_ACCESS;
269 return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL);
272 static void file_destroy( struct object *obj )
274 struct file *file = (struct file *)obj;
275 assert( obj->ops == &file_ops );
277 if (file->fd) release_object( file->fd );
280 /* set the last error depending on errno */
281 void file_set_error(void)
286 case EAGAIN: set_error( STATUS_SHARING_VIOLATION ); break;
287 case EBADF: set_error( STATUS_INVALID_HANDLE ); break;
288 case ENOSPC: set_error( STATUS_DISK_FULL ); break;
291 case EPERM: set_error( STATUS_ACCESS_DENIED ); break;
292 case EROFS: set_error( STATUS_MEDIA_WRITE_PROTECTED ); break;
293 case EBUSY: set_error( STATUS_FILE_LOCK_CONFLICT ); break;
294 case ENOENT: set_error( STATUS_NO_SUCH_FILE ); break;
295 case EISDIR: set_error( STATUS_FILE_IS_A_DIRECTORY ); break;
297 case EMFILE: set_error( STATUS_TOO_MANY_OPENED_FILES ); break;
298 case EEXIST: set_error( STATUS_OBJECT_NAME_COLLISION ); break;
299 case EINVAL: set_error( STATUS_INVALID_PARAMETER ); break;
300 case ESPIPE: set_error( STATUS_ILLEGAL_FUNCTION ); break;
301 case ENOTEMPTY: set_error( STATUS_DIRECTORY_NOT_EMPTY ); break;
302 case EIO: set_error( STATUS_ACCESS_VIOLATION ); break;
303 case ENOTDIR: set_error( STATUS_NOT_A_DIRECTORY ); break;
304 case EFBIG: set_error( STATUS_SECTION_TOO_BIG ); break;
305 case ENODEV: set_error( STATUS_NO_SUCH_DEVICE ); break;
306 case ENXIO: set_error( STATUS_NO_SUCH_DEVICE ); break;
308 case EOVERFLOW: set_error( STATUS_INVALID_PARAMETER ); break;
311 perror("wineserver: file_set_error() can't map error");
312 set_error( STATUS_UNSUCCESSFUL );
317 struct file *get_file_obj( struct process *process, obj_handle_t handle, unsigned int access )
319 return (struct file *)get_handle_obj( process, handle, access, &file_ops );
322 int get_file_unix_fd( struct file *file )
324 return get_unix_fd( file->fd );
327 struct file *grab_file_unless_removable( struct file *file )
329 if (is_fd_removable( file->fd )) return NULL;
330 return (struct file *)grab_object( file );
333 /* extend a file beyond the current end of file */
334 static int extend_file( struct file *file, file_pos_t new_size )
336 static const char zero;
337 int unix_fd = get_file_unix_fd( file );
338 off_t size = new_size;
340 if (unix_fd == -1) return 0;
342 if (sizeof(new_size) > sizeof(size) && size != new_size)
344 set_error( STATUS_INVALID_PARAMETER );
347 /* extend the file one byte beyond the requested size and then truncate it */
348 /* this should work around ftruncate implementations that can't extend files */
349 if (pwrite( unix_fd, &zero, 1, size ) != -1)
351 ftruncate( unix_fd, size );
358 /* try to grow the file to the specified size */
359 int grow_file( struct file *file, file_pos_t size )
362 int unix_fd = get_file_unix_fd( file );
364 if (unix_fd == -1) return 0;
366 if (fstat( unix_fd, &st ) == -1)
371 if (st.st_size >= size) return 1; /* already large enough */
372 return extend_file( file, size );
376 DECL_HANDLER(create_file)
381 if ((file = create_file( get_req_data(), get_req_data_size(), req->access,
382 req->sharing, req->create, req->options, req->attrs )))
384 reply->handle = alloc_handle( current->process, file, req->access, req->attributes );
385 release_object( file );
389 /* allocate a file handle for a Unix fd */
390 DECL_HANDLER(alloc_file_handle)
396 if ((fd = thread_get_inflight_fd( current, req->fd )) == -1)
398 set_error( STATUS_INVALID_HANDLE );
401 if ((file = create_file_for_fd( fd, req->access, FILE_SHARE_READ | FILE_SHARE_WRITE )))
403 reply->handle = alloc_handle( current->process, file, req->access, req->attributes );
404 release_object( file );
408 /* lock a region of a file */
409 DECL_HANDLER(lock_file)
412 file_pos_t offset = ((file_pos_t)req->offset_high << 32) | req->offset_low;
413 file_pos_t count = ((file_pos_t)req->count_high << 32) | req->count_low;
415 if ((file = get_file_obj( current->process, req->handle, 0 )))
417 reply->handle = lock_fd( file->fd, offset, count, req->shared, req->wait );
418 reply->overlapped = is_overlapped( file );
419 release_object( file );
423 /* unlock a region of a file */
424 DECL_HANDLER(unlock_file)
427 file_pos_t offset = ((file_pos_t)req->offset_high << 32) | req->offset_low;
428 file_pos_t count = ((file_pos_t)req->count_high << 32) | req->count_low;
430 if ((file = get_file_obj( current->process, req->handle, 0 )))
432 unlock_fd( file->fd, offset, count );
433 release_object( file );