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 unsigned int options; /* file options (FILE_DELETE_ON_CLOSE, FILE_SYNCHRONOUS...) */
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 unsigned int file_map_access( struct object *obj, unsigned int access );
69 static void file_destroy( struct object *obj );
71 static int file_get_poll_events( struct fd *fd );
72 static void file_flush( struct fd *fd, struct event **event );
73 static enum server_fd_type file_get_info( struct fd *fd, int *flags );
75 static const struct object_ops file_ops =
77 sizeof(struct file), /* size */
79 add_queue, /* add_queue */
80 remove_queue, /* remove_queue */
81 default_fd_signaled, /* signaled */
82 no_satisfied, /* satisfied */
83 no_signal, /* signal */
84 file_get_fd, /* get_fd */
85 file_map_access, /* map_access */
86 no_lookup_name, /* lookup_name */
87 no_open_file, /* open_file */
88 fd_close_handle, /* close_handle */
89 file_destroy /* destroy */
92 static const struct fd_ops file_fd_ops =
94 file_get_poll_events, /* get_poll_events */
95 default_poll_event, /* poll_event */
96 file_flush, /* flush */
97 file_get_info, /* get_file_info */
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 !(file->options & (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 file->options = FILE_SYNCHRONOUS_IO_NONALERT;
118 if (!(file->fd = create_anonymous_fd( &file_fd_ops, fd, &file->obj )))
120 release_object( file );
127 static struct object *create_file_obj( struct fd *fd, unsigned int access, unsigned int options )
129 struct file *file = alloc_object( &file_ops );
131 if (!file) return NULL;
132 file->access = access;
133 file->options = options;
136 set_fd_user( fd, &file_fd_ops, &file->obj );
140 static struct object *create_file( const char *nameptr, data_size_t len, unsigned int access,
141 unsigned int sharing, int create, unsigned int options,
144 struct object *obj = NULL;
150 if (!(name = mem_alloc( len + 1 ))) return NULL;
151 memcpy( name, nameptr, len );
156 case FILE_CREATE: flags = O_CREAT | O_EXCL; break;
157 case FILE_OVERWRITE_IF: /* FIXME: the difference is whether we trash existing attr or not */
158 case FILE_SUPERSEDE: flags = O_CREAT | O_TRUNC; break;
159 case FILE_OPEN: flags = 0; break;
160 case FILE_OPEN_IF: flags = O_CREAT; break;
161 case FILE_OVERWRITE: flags = O_TRUNC; break;
162 default: set_error( STATUS_INVALID_PARAMETER ); goto done;
165 mode = (attrs & FILE_ATTRIBUTE_READONLY) ? 0444 : 0666;
168 (!strcasecmp( name + len - 4, ".exe" ) || !strcasecmp( name + len - 4, ".com" )))
171 access = generic_file_map_access( access );
173 /* FIXME: should set error to STATUS_OBJECT_NAME_COLLISION if file existed before */
174 fd = open_fd( name, flags | O_NONBLOCK | O_LARGEFILE, &mode, access, sharing, options );
178 obj = create_dir_obj( fd );
179 else if (S_ISCHR(mode) && is_serial_fd( fd ))
180 obj = create_serial( fd, options );
182 obj = create_file_obj( fd, access, options );
184 release_object( fd );
191 /* check if two file objects point to the same file */
192 int is_same_file( struct file *file1, struct file *file2 )
194 return is_same_file_fd( file1->fd, file2->fd );
197 /* create a temp file for anonymous mappings */
198 struct file *create_temp_file( int access )
203 sprintf( tmpfn, "anonmap.XXXXXX" ); /* create it in the server directory */
204 fd = mkstemps( tmpfn, 0 );
211 return create_file_for_fd( fd, access, 0 );
214 static void file_dump( struct object *obj, int verbose )
216 struct file *file = (struct file *)obj;
217 assert( obj->ops == &file_ops );
218 fprintf( stderr, "File fd=%p options=%08x\n", file->fd, file->options );
221 static int file_get_poll_events( struct fd *fd )
223 struct file *file = get_fd_user( fd );
225 assert( file->obj.ops == &file_ops );
226 if (file->access & FILE_UNIX_READ_ACCESS) events |= POLLIN;
227 if (file->access & FILE_UNIX_WRITE_ACCESS) events |= POLLOUT;
231 static void file_flush( struct fd *fd, struct event **event )
233 int unix_fd = get_unix_fd( fd );
234 if (unix_fd != -1 && fsync( unix_fd ) == -1) file_set_error();
237 static enum server_fd_type file_get_info( struct fd *fd, int *flags )
239 struct file *file = get_fd_user( fd );
242 if (is_overlapped( file )) *flags |= FD_FLAG_OVERLAPPED;
246 static struct fd *file_get_fd( struct object *obj )
248 struct file *file = (struct file *)obj;
249 assert( obj->ops == &file_ops );
250 return (struct fd *)grab_object( file->fd );
253 static unsigned int generic_file_map_access( unsigned int access )
255 if (access & GENERIC_READ) access |= FILE_GENERIC_READ;
256 if (access & GENERIC_WRITE) access |= FILE_GENERIC_WRITE;
257 if (access & GENERIC_EXECUTE) access |= FILE_GENERIC_EXECUTE;
258 if (access & GENERIC_ALL) access |= FILE_ALL_ACCESS;
259 return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL);
262 static unsigned int file_map_access( struct object *obj, unsigned int access )
264 return generic_file_map_access( access );
267 static void file_destroy( struct object *obj )
269 struct file *file = (struct file *)obj;
270 assert( obj->ops == &file_ops );
272 if (file->fd) release_object( file->fd );
275 /* set the last error depending on errno */
276 void file_set_error(void)
280 case EAGAIN: set_error( STATUS_SHARING_VIOLATION ); break;
281 case EBADF: set_error( STATUS_INVALID_HANDLE ); break;
282 case ENOSPC: set_error( STATUS_DISK_FULL ); break;
285 case EPERM: set_error( STATUS_ACCESS_DENIED ); break;
286 case EROFS: set_error( STATUS_MEDIA_WRITE_PROTECTED ); break;
287 case EBUSY: set_error( STATUS_FILE_LOCK_CONFLICT ); break;
288 case ENOENT: set_error( STATUS_NO_SUCH_FILE ); break;
289 case EISDIR: set_error( STATUS_FILE_IS_A_DIRECTORY ); break;
291 case EMFILE: set_error( STATUS_TOO_MANY_OPENED_FILES ); break;
292 case EEXIST: set_error( STATUS_OBJECT_NAME_COLLISION ); break;
293 case EINVAL: set_error( STATUS_INVALID_PARAMETER ); break;
294 case ESPIPE: set_error( STATUS_ILLEGAL_FUNCTION ); break;
295 case ENOTEMPTY: set_error( STATUS_DIRECTORY_NOT_EMPTY ); break;
296 case EIO: set_error( STATUS_ACCESS_VIOLATION ); break;
297 case ENOTDIR: set_error( STATUS_NOT_A_DIRECTORY ); break;
298 case EFBIG: set_error( STATUS_SECTION_TOO_BIG ); break;
299 case ENODEV: set_error( STATUS_NO_SUCH_DEVICE ); break;
300 case ENXIO: set_error( STATUS_NO_SUCH_DEVICE ); break;
302 case EOVERFLOW: set_error( STATUS_INVALID_PARAMETER ); break;
304 default: perror("file_set_error"); set_error( STATUS_UNSUCCESSFUL ); break;
308 struct file *get_file_obj( struct process *process, obj_handle_t handle, unsigned int access )
310 return (struct file *)get_handle_obj( process, handle, access, &file_ops );
313 int get_file_unix_fd( struct file *file )
315 return get_unix_fd( file->fd );
318 struct file *grab_file_unless_removable( struct file *file )
320 if (is_fd_removable( file->fd )) return NULL;
321 return (struct file *)grab_object( file );
324 /* extend a file beyond the current end of file */
325 static int extend_file( struct file *file, file_pos_t new_size )
327 static const char zero;
328 int unix_fd = get_file_unix_fd( file );
329 off_t size = new_size;
331 if (unix_fd == -1) return 0;
333 if (sizeof(new_size) > sizeof(size) && size != new_size)
335 set_error( STATUS_INVALID_PARAMETER );
338 /* extend the file one byte beyond the requested size and then truncate it */
339 /* this should work around ftruncate implementations that can't extend files */
340 if (pwrite( unix_fd, &zero, 1, size ) != -1)
342 ftruncate( unix_fd, size );
349 /* try to grow the file to the specified size */
350 int grow_file( struct file *file, file_pos_t size )
353 int unix_fd = get_file_unix_fd( file );
355 if (unix_fd == -1) return 0;
357 if (fstat( unix_fd, &st ) == -1)
362 if (st.st_size >= size) return 1; /* already large enough */
363 return extend_file( file, size );
367 DECL_HANDLER(create_file)
372 if ((file = create_file( get_req_data(), get_req_data_size(), req->access,
373 req->sharing, req->create, req->options, req->attrs )))
375 reply->handle = alloc_handle( current->process, file, req->access, req->attributes );
376 release_object( file );
380 /* allocate a file handle for a Unix fd */
381 DECL_HANDLER(alloc_file_handle)
387 if ((fd = thread_get_inflight_fd( current, req->fd )) == -1)
389 set_error( STATUS_INVALID_HANDLE );
392 if ((file = create_file_for_fd( fd, req->access, FILE_SHARE_READ | FILE_SHARE_WRITE )))
394 reply->handle = alloc_handle( current->process, file, req->access, req->attributes );
395 release_object( file );
399 /* lock a region of a file */
400 DECL_HANDLER(lock_file)
403 file_pos_t offset = ((file_pos_t)req->offset_high << 32) | req->offset_low;
404 file_pos_t count = ((file_pos_t)req->count_high << 32) | req->count_low;
406 if ((file = get_file_obj( current->process, req->handle, 0 )))
408 reply->handle = lock_fd( file->fd, offset, count, req->shared, req->wait );
409 reply->overlapped = is_overlapped( file );
410 release_object( file );
414 /* unlock a region of a file */
415 DECL_HANDLER(unlock_file)
418 file_pos_t offset = ((file_pos_t)req->offset_high << 32) | req->offset_low;
419 file_pos_t count = ((file_pos_t)req->count_high << 32) | req->count_low;
421 if ((file = get_file_obj( current->process, req->handle, 0 )))
423 unlock_fd( file->fd, offset, count );
424 release_object( file );