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>
56 struct object obj; /* object header */
57 struct fd *fd; /* file descriptor for this file */
58 unsigned int access; /* file access (GENERIC_READ/WRITE) */
59 unsigned int options; /* file options (FILE_DELETE_ON_CLOSE, FILE_SYNCHRONOUS...) */
62 static void file_dump( struct object *obj, int verbose );
63 static struct fd *file_get_fd( struct object *obj );
64 static void file_destroy( struct object *obj );
66 static int file_get_poll_events( struct fd *fd );
67 static int file_flush( struct fd *fd, struct event **event );
68 static int file_get_info( struct fd *fd );
70 static const struct object_ops file_ops =
72 sizeof(struct file), /* size */
74 default_fd_add_queue, /* add_queue */
75 default_fd_remove_queue, /* remove_queue */
76 default_fd_signaled, /* signaled */
77 no_satisfied, /* satisfied */
78 no_signal, /* signal */
79 file_get_fd, /* get_fd */
80 no_close_handle, /* close_handle */
81 file_destroy /* destroy */
84 static const struct fd_ops file_fd_ops =
86 file_get_poll_events, /* get_poll_events */
87 default_poll_event, /* poll_event */
88 file_flush, /* flush */
89 file_get_info, /* get_file_info */
90 default_fd_queue_async, /* queue_async */
91 default_fd_cancel_async /* cancel_async */
94 static inline int is_overlapped( const struct file *file )
96 return !(file->options & (FILE_SYNCHRONOUS_IO_ALERT | FILE_SYNCHRONOUS_IO_NONALERT));
99 /* create a file from a file descriptor */
100 /* if the function fails the fd is closed */
101 static struct file *create_file_for_fd( int fd, unsigned int access, unsigned int sharing )
105 if ((file = alloc_object( &file_ops )))
107 file->access = access;
108 file->options = FILE_SYNCHRONOUS_IO_NONALERT;
109 if (!(file->fd = create_anonymous_fd( &file_fd_ops, fd, &file->obj )))
111 release_object( file );
119 static struct object *create_file( const char *nameptr, size_t len, unsigned int access,
120 unsigned int sharing, int create, unsigned int options,
128 if (!(name = mem_alloc( len + 1 ))) return NULL;
129 memcpy( name, nameptr, len );
134 case FILE_CREATE: flags = O_CREAT | O_EXCL; break;
135 case FILE_OVERWRITE_IF: /* FIXME: the difference is whether we trash existing attr or not */
136 case FILE_SUPERSEDE: flags = O_CREAT | O_TRUNC; break;
137 case FILE_OPEN: flags = 0; break;
138 case FILE_OPEN_IF: flags = O_CREAT; break;
139 case FILE_OVERWRITE: flags = O_TRUNC; break;
140 default: set_error( STATUS_INVALID_PARAMETER ); goto error;
143 switch(access & (GENERIC_READ | GENERIC_WRITE))
146 case GENERIC_READ: flags |= O_RDONLY; break;
147 case GENERIC_WRITE: flags |= O_WRONLY; break;
148 case GENERIC_READ|GENERIC_WRITE: flags |= O_RDWR; break;
150 mode = (attrs & FILE_ATTRIBUTE_READONLY) ? 0444 : 0666;
153 (!strcasecmp( name + len - 4, ".exe" ) || !strcasecmp( name + len - 4, ".com" )))
156 if (!(file = alloc_object( &file_ops ))) goto error;
158 file->access = access;
159 file->options = options;
161 /* FIXME: should set error to STATUS_OBJECT_NAME_COLLISION if file existed before */
162 if (!(file->fd = alloc_fd( &file_fd_ops, &file->obj )) ||
163 !(file->fd = open_fd( file->fd, name, flags | O_NONBLOCK | O_LARGEFILE,
164 &mode, access, sharing, options )))
167 release_object( file );
172 /* check for serial port */
173 if (S_ISCHR(mode) && is_serial_fd( file->fd ))
175 struct object *obj = create_serial( file->fd, file->options );
176 release_object( file );
187 /* check if two file objects point to the same file */
188 int is_same_file( struct file *file1, struct file *file2 )
190 return is_same_file_fd( file1->fd, file2->fd );
193 /* create a temp file for anonymous mappings */
194 struct file *create_temp_file( int access )
199 sprintf( tmpfn, "anonmap.XXXXXX" ); /* create it in the server directory */
200 fd = mkstemps( tmpfn, 0 );
207 return create_file_for_fd( fd, access, 0 );
210 static void file_dump( struct object *obj, int verbose )
212 struct file *file = (struct file *)obj;
213 assert( obj->ops == &file_ops );
214 fprintf( stderr, "File fd=%p options=%08x\n", file->fd, file->options );
217 static int file_get_poll_events( struct fd *fd )
219 struct file *file = get_fd_user( fd );
221 assert( file->obj.ops == &file_ops );
222 if (file->access & GENERIC_READ) events |= POLLIN;
223 if (file->access & GENERIC_WRITE) events |= POLLOUT;
227 static int file_flush( struct fd *fd, struct event **event )
229 int ret = 0, unix_fd = get_unix_fd( fd );
233 ret = (fsync( unix_fd ) != -1);
234 if (!ret) file_set_error();
239 static int file_get_info( struct fd *fd )
241 struct file *file = get_fd_user( fd );
243 if (is_overlapped( file )) return FD_FLAG_OVERLAPPED;
247 static struct fd *file_get_fd( struct object *obj )
249 struct file *file = (struct file *)obj;
250 assert( obj->ops == &file_ops );
251 return (struct fd *)grab_object( file->fd );
254 static void file_destroy( struct object *obj )
256 struct file *file = (struct file *)obj;
257 assert( obj->ops == &file_ops );
259 if (file->fd) release_object( file->fd );
262 /* set the last error depending on errno */
263 void file_set_error(void)
267 case EAGAIN: set_error( STATUS_SHARING_VIOLATION ); break;
268 case EBADF: set_error( STATUS_INVALID_HANDLE ); break;
269 case ENOSPC: set_error( STATUS_DISK_FULL ); break;
272 case EPERM: set_error( STATUS_ACCESS_DENIED ); break;
273 case EROFS: set_error( STATUS_MEDIA_WRITE_PROTECTED ); break;
274 case EBUSY: set_error( STATUS_FILE_LOCK_CONFLICT ); break;
275 case ENOENT: set_error( STATUS_NO_SUCH_FILE ); break;
276 case EISDIR: set_error( STATUS_FILE_IS_A_DIRECTORY ); break;
278 case EMFILE: set_error( STATUS_NO_MORE_FILES ); break;
279 case EEXIST: set_error( STATUS_OBJECT_NAME_COLLISION ); break;
280 case EINVAL: set_error( STATUS_INVALID_PARAMETER ); break;
281 case ESPIPE: set_win32_error( ERROR_SEEK ); break;
282 case ENOTEMPTY: set_error( STATUS_DIRECTORY_NOT_EMPTY ); break;
283 case EIO: set_error( STATUS_ACCESS_VIOLATION ); break;
284 case ENOTDIR: set_error( STATUS_NOT_A_DIRECTORY ); break;
285 case EFBIG: set_error( STATUS_SECTION_TOO_BIG ); break;
286 case ENODEV: set_error( STATUS_NO_SUCH_DEVICE ); break;
287 case ENXIO: set_error( STATUS_NO_SUCH_DEVICE ); break;
289 case EOVERFLOW: set_error( STATUS_INVALID_PARAMETER ); break;
291 default: perror("file_set_error"); set_error( STATUS_UNSUCCESSFUL ); break;
295 struct file *get_file_obj( struct process *process, obj_handle_t handle, unsigned int access )
297 return (struct file *)get_handle_obj( process, handle, access, &file_ops );
300 int get_file_unix_fd( struct file *file )
302 return get_unix_fd( file->fd );
305 /* extend a file beyond the current end of file */
306 static int extend_file( struct file *file, file_pos_t new_size )
308 static const char zero;
309 int unix_fd = get_file_unix_fd( file );
310 off_t size = new_size;
312 if (unix_fd == -1) return 0;
314 if (sizeof(new_size) > sizeof(size) && size != new_size)
316 set_error( STATUS_INVALID_PARAMETER );
319 /* extend the file one byte beyond the requested size and then truncate it */
320 /* this should work around ftruncate implementations that can't extend files */
321 if (pwrite( unix_fd, &zero, 1, size ) != -1)
323 ftruncate( unix_fd, size );
330 /* try to grow the file to the specified size */
331 int grow_file( struct file *file, file_pos_t size )
334 int unix_fd = get_file_unix_fd( file );
336 if (unix_fd == -1) return 0;
338 if (fstat( unix_fd, &st ) == -1)
343 if (st.st_size >= size) return 1; /* already large enough */
344 return extend_file( file, size );
348 DECL_HANDLER(create_file)
353 if ((file = create_file( get_req_data(), get_req_data_size(), req->access,
354 req->sharing, req->create, req->options, req->attrs )))
356 reply->handle = alloc_handle( current->process, file, req->access, req->inherit );
357 release_object( file );
361 /* allocate a file handle for a Unix fd */
362 DECL_HANDLER(alloc_file_handle)
368 if ((fd = thread_get_inflight_fd( current, req->fd )) == -1)
370 set_error( STATUS_INVALID_HANDLE );
373 if ((file = create_file_for_fd( fd, req->access, FILE_SHARE_READ | FILE_SHARE_WRITE )))
375 reply->handle = alloc_handle( current->process, file, req->access, req->inherit );
376 release_object( file );
380 /* lock a region of a file */
381 DECL_HANDLER(lock_file)
384 file_pos_t offset = ((file_pos_t)req->offset_high << 32) | req->offset_low;
385 file_pos_t count = ((file_pos_t)req->count_high << 32) | req->count_low;
387 if ((file = get_file_obj( current->process, req->handle, 0 )))
389 reply->handle = lock_fd( file->fd, offset, count, req->shared, req->wait );
390 reply->overlapped = is_overlapped( file );
391 release_object( file );
395 /* unlock a region of a file */
396 DECL_HANDLER(unlock_file)
399 file_pos_t offset = ((file_pos_t)req->offset_high << 32) | req->offset_low;
400 file_pos_t count = ((file_pos_t)req->count_high << 32) | req->count_low;
402 if ((file = get_file_obj( current->process, req->handle, 0 )))
404 unlock_fd( file->fd, offset, count );
405 release_object( file );