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...) */
65 static void file_dump( struct object *obj, int verbose );
66 static struct fd *file_get_fd( struct object *obj );
67 static void file_destroy( struct object *obj );
69 static int file_get_poll_events( struct fd *fd );
70 static int file_flush( struct fd *fd, struct event **event );
71 static int file_get_info( struct fd *fd );
73 static const struct object_ops file_ops =
75 sizeof(struct file), /* size */
77 default_fd_add_queue, /* add_queue */
78 default_fd_remove_queue, /* remove_queue */
79 default_fd_signaled, /* signaled */
80 no_satisfied, /* satisfied */
81 no_signal, /* signal */
82 file_get_fd, /* get_fd */
83 file_destroy /* destroy */
86 static const struct fd_ops file_fd_ops =
88 file_get_poll_events, /* get_poll_events */
89 default_poll_event, /* poll_event */
90 file_flush, /* flush */
91 file_get_info, /* get_file_info */
92 default_fd_queue_async, /* queue_async */
93 default_fd_cancel_async /* cancel_async */
96 static inline int is_overlapped( const struct file *file )
98 return !(file->options & (FILE_SYNCHRONOUS_IO_ALERT | FILE_SYNCHRONOUS_IO_NONALERT));
101 /* create a file from a file descriptor */
102 /* if the function fails the fd is closed */
103 static struct file *create_file_for_fd( int fd, unsigned int access, unsigned int sharing )
107 if ((file = alloc_object( &file_ops )))
109 file->access = access;
110 file->options = FILE_SYNCHRONOUS_IO_NONALERT;
111 if (!(file->fd = create_anonymous_fd( &file_fd_ops, fd, &file->obj )))
113 release_object( file );
121 static struct object *create_file( const char *nameptr, size_t len, unsigned int access,
122 unsigned int sharing, int create, unsigned int options,
130 if (!(name = mem_alloc( len + 1 ))) return NULL;
131 memcpy( name, nameptr, len );
136 case FILE_CREATE: flags = O_CREAT | O_EXCL; break;
137 case FILE_OVERWRITE_IF: /* FIXME: the difference is whether we trash existing attr or not */
138 case FILE_SUPERSEDE: flags = O_CREAT | O_TRUNC; break;
139 case FILE_OPEN: flags = 0; break;
140 case FILE_OPEN_IF: flags = O_CREAT; break;
141 case FILE_OVERWRITE: flags = O_TRUNC; break;
142 default: set_error( STATUS_INVALID_PARAMETER ); goto error;
145 switch(access & (GENERIC_READ | GENERIC_WRITE))
148 case GENERIC_READ: flags |= O_RDONLY; break;
149 case GENERIC_WRITE: flags |= O_WRONLY; break;
150 case GENERIC_READ|GENERIC_WRITE: flags |= O_RDWR; break;
152 mode = (attrs & FILE_ATTRIBUTE_READONLY) ? 0444 : 0666;
155 (!strcasecmp( name + len - 4, ".exe" ) || !strcasecmp( name + len - 4, ".com" )))
158 if (!(file = alloc_object( &file_ops ))) goto error;
160 file->access = access;
161 file->options = options;
163 /* FIXME: should set error to STATUS_OBJECT_NAME_COLLISION if file existed before */
164 if (!(file->fd = alloc_fd( &file_fd_ops, &file->obj )) ||
165 !(file->fd = open_fd( file->fd, name, flags | O_NONBLOCK | O_LARGEFILE,
166 &mode, access, sharing, options )))
169 release_object( file );
174 /* check for serial port */
175 if (S_ISCHR(mode) && is_serial_fd( file->fd ))
177 struct object *obj = create_serial( file->fd, file->options );
178 release_object( file );
189 /* check if two file objects point to the same file */
190 int is_same_file( struct file *file1, struct file *file2 )
192 return is_same_file_fd( file1->fd, file2->fd );
195 /* create a temp file for anonymous mappings */
196 struct file *create_temp_file( int access )
201 sprintf( tmpfn, "anonmap.XXXXXX" ); /* create it in the server directory */
202 fd = mkstemps( tmpfn, 0 );
209 return create_file_for_fd( fd, access, 0 );
212 static void file_dump( struct object *obj, int verbose )
214 struct file *file = (struct file *)obj;
215 assert( obj->ops == &file_ops );
216 fprintf( stderr, "File fd=%p options=%08x\n", file->fd, file->options );
219 static int file_get_poll_events( struct fd *fd )
221 struct file *file = get_fd_user( fd );
223 assert( file->obj.ops == &file_ops );
224 if (file->access & GENERIC_READ) events |= POLLIN;
225 if (file->access & GENERIC_WRITE) events |= POLLOUT;
229 static int file_flush( struct fd *fd, struct event **event )
231 int ret = (fsync( get_unix_fd(fd) ) != -1);
232 if (!ret) file_set_error();
236 static int file_get_info( struct fd *fd )
238 struct file *file = get_fd_user( fd );
240 if (is_overlapped( file )) return FD_FLAG_OVERLAPPED;
244 static struct fd *file_get_fd( struct object *obj )
246 struct file *file = (struct file *)obj;
247 assert( obj->ops == &file_ops );
248 return (struct fd *)grab_object( file->fd );
251 static void file_destroy( struct object *obj )
253 struct file *file = (struct file *)obj;
254 assert( obj->ops == &file_ops );
256 if (file->fd) release_object( file->fd );
259 /* set the last error depending on errno */
260 void file_set_error(void)
264 case EAGAIN: set_error( STATUS_SHARING_VIOLATION ); break;
265 case EBADF: set_error( STATUS_INVALID_HANDLE ); break;
266 case ENOSPC: set_error( STATUS_DISK_FULL ); break;
269 case EPERM: set_error( STATUS_ACCESS_DENIED ); break;
270 case EROFS: set_error( STATUS_MEDIA_WRITE_PROTECTED ); break;
271 case EBUSY: set_error( STATUS_FILE_LOCK_CONFLICT ); break;
272 case ENOENT: set_error( STATUS_NO_SUCH_FILE ); break;
273 case EISDIR: set_error( STATUS_FILE_IS_A_DIRECTORY ); break;
275 case EMFILE: set_error( STATUS_NO_MORE_FILES ); break;
276 case EEXIST: set_error( STATUS_OBJECT_NAME_COLLISION ); break;
277 case EINVAL: set_error( STATUS_INVALID_PARAMETER ); break;
278 case ESPIPE: set_win32_error( ERROR_SEEK ); break;
279 case ENOTEMPTY: set_error( STATUS_DIRECTORY_NOT_EMPTY ); break;
280 case EIO: set_error( STATUS_ACCESS_VIOLATION ); break;
281 case ENOTDIR: set_error( STATUS_NOT_A_DIRECTORY ); break;
282 case EFBIG: set_error( STATUS_SECTION_TOO_BIG ); break;
283 case ENODEV: set_error( STATUS_NO_SUCH_DEVICE ); break;
284 case ENXIO: set_error( STATUS_NO_SUCH_DEVICE ); break;
286 case EOVERFLOW: set_error( STATUS_INVALID_PARAMETER ); break;
288 default: perror("file_set_error"); set_error( STATUS_UNSUCCESSFUL ); break;
292 struct file *get_file_obj( struct process *process, obj_handle_t handle, unsigned int access )
294 return (struct file *)get_handle_obj( process, handle, access, &file_ops );
297 int get_file_unix_fd( struct file *file )
299 return get_unix_fd( file->fd );
302 /* extend a file beyond the current end of file */
303 static int extend_file( struct file *file, file_pos_t new_size )
305 static const char zero;
306 int unix_fd = get_file_unix_fd( file );
307 off_t size = new_size;
309 if (sizeof(new_size) > sizeof(size) && size != new_size)
311 set_error( STATUS_INVALID_PARAMETER );
314 /* extend the file one byte beyond the requested size and then truncate it */
315 /* this should work around ftruncate implementations that can't extend files */
316 if (pwrite( unix_fd, &zero, 1, size ) != -1)
318 ftruncate( unix_fd, size );
325 /* try to grow the file to the specified size */
326 int grow_file( struct file *file, file_pos_t size )
329 int unix_fd = get_file_unix_fd( file );
331 if (fstat( unix_fd, &st ) == -1)
336 if (st.st_size >= size) return 1; /* already large enough */
337 return extend_file( file, size );
341 DECL_HANDLER(create_file)
346 if ((file = create_file( get_req_data(), get_req_data_size(), req->access,
347 req->sharing, req->create, req->options, req->attrs )))
349 reply->handle = alloc_handle( current->process, file, req->access, req->inherit );
350 release_object( file );
354 /* allocate a file handle for a Unix fd */
355 DECL_HANDLER(alloc_file_handle)
361 if ((fd = thread_get_inflight_fd( current, req->fd )) == -1)
363 set_error( STATUS_INVALID_HANDLE );
366 if ((file = create_file_for_fd( fd, req->access, FILE_SHARE_READ | FILE_SHARE_WRITE )))
368 reply->handle = alloc_handle( current->process, file, req->access, req->inherit );
369 release_object( file );
373 /* lock a region of a file */
374 DECL_HANDLER(lock_file)
377 file_pos_t offset = ((file_pos_t)req->offset_high << 32) | req->offset_low;
378 file_pos_t count = ((file_pos_t)req->count_high << 32) | req->count_low;
380 if ((file = get_file_obj( current->process, req->handle, 0 )))
382 reply->handle = lock_fd( file->fd, offset, count, req->shared, req->wait );
383 reply->overlapped = is_overlapped( file );
384 release_object( file );
388 /* unlock a region of a file */
389 DECL_HANDLER(unlock_file)
392 file_pos_t offset = ((file_pos_t)req->offset_high << 32) | req->offset_low;
393 file_pos_t count = ((file_pos_t)req->count_high << 32) | req->count_low;
395 if ((file = get_file_obj( current->process, req->handle, 0 )))
397 unlock_fd( file->fd, offset, count );
398 release_object( file );