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>
57 struct object obj; /* object header */
58 struct fd *fd; /* file descriptor for this file */
59 unsigned int access; /* file access (GENERIC_READ/WRITE) */
60 unsigned int options; /* file options (FILE_DELETE_ON_CLOSE, FILE_SYNCHRONOUS...) */
63 static void file_dump( struct object *obj, int verbose );
64 static struct fd *file_get_fd( struct object *obj );
65 static void file_destroy( struct object *obj );
67 static int file_get_poll_events( struct fd *fd );
68 static int file_flush( struct fd *fd, struct event **event );
69 static int file_get_info( struct fd *fd );
71 static const struct object_ops file_ops =
73 sizeof(struct file), /* size */
75 default_fd_add_queue, /* add_queue */
76 default_fd_remove_queue, /* remove_queue */
77 default_fd_signaled, /* signaled */
78 no_satisfied, /* satisfied */
79 no_signal, /* signal */
80 file_get_fd, /* get_fd */
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 = (fsync( get_unix_fd(fd) ) != -1);
231 if (!ret) file_set_error();
235 static int file_get_info( struct fd *fd )
237 struct file *file = get_fd_user( fd );
239 if (is_overlapped( file )) return FD_FLAG_OVERLAPPED;
243 static struct fd *file_get_fd( struct object *obj )
245 struct file *file = (struct file *)obj;
246 assert( obj->ops == &file_ops );
247 return (struct fd *)grab_object( file->fd );
250 static void file_destroy( struct object *obj )
252 struct file *file = (struct file *)obj;
253 assert( obj->ops == &file_ops );
255 if (file->fd) release_object( file->fd );
258 /* set the last error depending on errno */
259 void file_set_error(void)
263 case EAGAIN: set_error( STATUS_SHARING_VIOLATION ); break;
264 case EBADF: set_error( STATUS_INVALID_HANDLE ); break;
265 case ENOSPC: set_error( STATUS_DISK_FULL ); break;
268 case EPERM: set_error( STATUS_ACCESS_DENIED ); break;
269 case EROFS: set_error( STATUS_MEDIA_WRITE_PROTECTED ); break;
270 case EBUSY: set_error( STATUS_FILE_LOCK_CONFLICT ); break;
271 case ENOENT: set_error( STATUS_NO_SUCH_FILE ); break;
272 case EISDIR: set_error( STATUS_FILE_IS_A_DIRECTORY ); break;
274 case EMFILE: set_error( STATUS_NO_MORE_FILES ); break;
275 case EEXIST: set_error( STATUS_OBJECT_NAME_COLLISION ); break;
276 case EINVAL: set_error( STATUS_INVALID_PARAMETER ); break;
277 case ESPIPE: set_win32_error( ERROR_SEEK ); break;
278 case ENOTEMPTY: set_error( STATUS_DIRECTORY_NOT_EMPTY ); break;
279 case EIO: set_error( STATUS_ACCESS_VIOLATION ); break;
280 case ENOTDIR: set_error( STATUS_NOT_A_DIRECTORY ); break;
281 case EFBIG: set_error( STATUS_SECTION_TOO_BIG ); break;
282 case ENODEV: set_error( STATUS_NO_SUCH_DEVICE ); break;
283 case ENXIO: set_error( STATUS_NO_SUCH_DEVICE ); break;
285 case EOVERFLOW: set_error( STATUS_INVALID_PARAMETER ); break;
287 default: perror("file_set_error"); set_error( STATUS_UNSUCCESSFUL ); break;
291 struct file *get_file_obj( struct process *process, obj_handle_t handle, unsigned int access )
293 return (struct file *)get_handle_obj( process, handle, access, &file_ops );
296 int get_file_unix_fd( struct file *file )
298 return get_unix_fd( file->fd );
301 /* extend a file beyond the current end of file */
302 static int extend_file( struct file *file, file_pos_t new_size )
304 static const char zero;
305 int unix_fd = get_file_unix_fd( file );
306 off_t size = new_size;
308 if (sizeof(new_size) > sizeof(size) && size != new_size)
310 set_error( STATUS_INVALID_PARAMETER );
313 /* extend the file one byte beyond the requested size and then truncate it */
314 /* this should work around ftruncate implementations that can't extend files */
315 if (pwrite( unix_fd, &zero, 1, size ) != -1)
317 ftruncate( unix_fd, size );
324 /* try to grow the file to the specified size */
325 int grow_file( struct file *file, file_pos_t size )
328 int unix_fd = get_file_unix_fd( file );
330 if (fstat( unix_fd, &st ) == -1)
335 if (st.st_size >= size) return 1; /* already large enough */
336 return extend_file( file, size );
340 DECL_HANDLER(create_file)
345 if ((file = create_file( get_req_data(), get_req_data_size(), req->access,
346 req->sharing, req->create, req->options, req->attrs )))
348 reply->handle = alloc_handle( current->process, file, req->access, req->inherit );
349 release_object( file );
353 /* allocate a file handle for a Unix fd */
354 DECL_HANDLER(alloc_file_handle)
360 if ((fd = thread_get_inflight_fd( current, req->fd )) == -1)
362 set_error( STATUS_INVALID_HANDLE );
365 if ((file = create_file_for_fd( fd, req->access, FILE_SHARE_READ | FILE_SHARE_WRITE )))
367 reply->handle = alloc_handle( current->process, file, req->access, req->inherit );
368 release_object( file );
372 /* lock a region of a file */
373 DECL_HANDLER(lock_file)
376 file_pos_t offset = ((file_pos_t)req->offset_high << 32) | req->offset_low;
377 file_pos_t count = ((file_pos_t)req->count_high << 32) | req->count_low;
379 if ((file = get_file_obj( current->process, req->handle, 0 )))
381 reply->handle = lock_fd( file->fd, offset, count, req->shared, req->wait );
382 reply->overlapped = is_overlapped( file );
383 release_object( file );
387 /* unlock a region of a file */
388 DECL_HANDLER(unlock_file)
391 file_pos_t offset = ((file_pos_t)req->offset_high << 32) | req->offset_low;
392 file_pos_t count = ((file_pos_t)req->count_high << 32) | req->count_low;
394 if ((file = get_file_obj( current->process, req->handle, 0 )))
396 unlock_fd( file->fd, offset, count );
397 release_object( file );