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...) */
61 struct async_queue read_q;
62 struct async_queue write_q;
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 void file_poll_event( struct fd *fd, int event );
71 static int file_flush( struct fd *fd, struct event **event );
72 static int file_get_info( struct fd *fd, struct get_file_info_reply *reply, int *flags );
73 static void file_queue_async( struct fd *fd, void *ptr, unsigned int status, int type, int count );
75 static const struct object_ops file_ops =
77 sizeof(struct file), /* size */
79 default_fd_add_queue, /* add_queue */
80 default_fd_remove_queue, /* remove_queue */
81 default_fd_signaled, /* signaled */
82 no_satisfied, /* satisfied */
83 file_get_fd, /* get_fd */
84 file_destroy /* destroy */
87 static const struct fd_ops file_fd_ops =
89 file_get_poll_events, /* get_poll_events */
90 file_poll_event, /* poll_event */
91 file_flush, /* flush */
92 file_get_info, /* get_file_info */
93 file_queue_async /* queue_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;
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;
161 if (is_overlapped( file ))
163 init_async_queue (&file->read_q);
164 init_async_queue (&file->write_q);
167 /* FIXME: should set error to STATUS_OBJECT_NAME_COLLISION if file existed before */
168 if (!(file->fd = alloc_fd( &file_fd_ops, &file->obj )) ||
169 !(file->fd = open_fd( file->fd, name, flags | O_NONBLOCK | O_LARGEFILE,
170 &mode, access, sharing,
171 (options & FILE_DELETE_ON_CLOSE) ? name : "" )))
174 release_object( file );
179 /* refuse to open a directory */
180 if (S_ISDIR(mode) && !(options & FILE_OPEN_FOR_BACKUP_INTENT))
182 set_error( STATUS_ACCESS_DENIED );
183 release_object( file );
186 /* check for serial port */
187 if (S_ISCHR(mode) && is_serial_fd( file->fd ))
189 struct object *obj = create_serial( file->fd, file->options );
190 release_object( file );
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 options=%08x\n", file->fd, file->options );
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 & GENERIC_READ) events |= POLLIN;
237 if (file->access & GENERIC_WRITE) events |= POLLOUT;
241 static void file_poll_event( struct fd *fd, int event )
243 struct file *file = get_fd_user( fd );
244 assert( file->obj.ops == &file_ops );
245 if (is_overlapped( file ))
247 if( IS_READY(file->read_q) && (POLLIN & event) )
249 async_notify(file->read_q.head, STATUS_ALERTED);
252 if( IS_READY(file->write_q) && (POLLOUT & event) )
254 async_notify(file->write_q.head, STATUS_ALERTED);
258 default_poll_event( fd, event );
262 static int file_flush( struct fd *fd, struct event **event )
264 int ret = (fsync( get_unix_fd(fd) ) != -1);
265 if (!ret) file_set_error();
269 static int file_get_info( struct fd *fd, struct get_file_info_reply *reply, int *flags )
272 struct file *file = get_fd_user( fd );
273 int unix_fd = get_unix_fd( fd );
277 if (fstat( unix_fd, &st ) == -1)
280 return FD_TYPE_INVALID;
282 if (S_ISCHR(st.st_mode) || S_ISFIFO(st.st_mode) ||
283 S_ISSOCK(st.st_mode) || isatty(unix_fd)) reply->type = FILE_TYPE_CHAR;
284 else reply->type = FILE_TYPE_DISK;
285 if (S_ISDIR(st.st_mode)) reply->attr = FILE_ATTRIBUTE_DIRECTORY;
286 else reply->attr = FILE_ATTRIBUTE_ARCHIVE;
287 if (!(st.st_mode & S_IWUSR)) reply->attr |= FILE_ATTRIBUTE_READONLY;
288 reply->access_time = st.st_atime;
289 reply->write_time = st.st_mtime;
290 reply->change_time = st.st_ctime;
291 if (S_ISDIR(st.st_mode))
293 reply->size_high = 0;
295 reply->alloc_high = 0;
296 reply->alloc_low = 0;
301 reply->size_high = st.st_size >> 32;
302 reply->size_low = st.st_size & 0xffffffff;
303 alloc = (file_pos_t)st.st_blksize * st.st_blocks;
304 reply->alloc_high = alloc >> 32;
305 reply->alloc_low = alloc & 0xffffffff;
307 reply->links = st.st_nlink;
308 reply->index_high = st.st_dev;
309 reply->index_low = st.st_ino;
310 reply->serial = 0; /* FIXME */
313 if (is_overlapped( file )) *flags |= FD_FLAG_OVERLAPPED;
314 return FD_TYPE_DEFAULT;
317 static void file_queue_async(struct fd *fd, void *ptr, unsigned int status, int type, int count)
319 struct file *file = get_fd_user( fd );
321 struct async_queue *q;
323 assert( file->obj.ops == &file_ops );
325 if (!is_overlapped( file ))
327 set_error ( STATUS_INVALID_HANDLE );
333 case ASYNC_TYPE_READ:
336 case ASYNC_TYPE_WRITE:
340 set_error( STATUS_INVALID_PARAMETER );
344 async = find_async ( q, current, ptr );
346 if ( status == STATUS_PENDING )
351 async = create_async ( &file->obj, current, ptr );
355 async->status = STATUS_PENDING;
357 async_insert( q, async );
359 /* Check if the new pending request can be served immediately */
360 events = check_fd_events( fd, file_get_poll_events( fd ) );
361 if (events) file_poll_event ( fd, events );
363 else if ( async ) destroy_async ( async );
364 else set_error ( STATUS_INVALID_PARAMETER );
366 set_fd_events( fd, file_get_poll_events( fd ));
369 static struct fd *file_get_fd( struct object *obj )
371 struct file *file = (struct file *)obj;
372 assert( obj->ops == &file_ops );
373 return (struct fd *)grab_object( file->fd );
376 static void file_destroy( struct object *obj )
378 struct file *file = (struct file *)obj;
379 assert( obj->ops == &file_ops );
381 if (is_overlapped( file ))
383 destroy_async_queue (&file->read_q);
384 destroy_async_queue (&file->write_q);
386 if (file->fd) release_object( file->fd );
389 /* set the last error depending on errno */
390 void file_set_error(void)
394 case EAGAIN: set_error( STATUS_SHARING_VIOLATION ); break;
395 case EBADF: set_error( STATUS_INVALID_HANDLE ); break;
396 case ENOSPC: set_error( STATUS_DISK_FULL ); break;
399 case EPERM: set_error( STATUS_ACCESS_DENIED ); break;
400 case EROFS: set_error( STATUS_MEDIA_WRITE_PROTECTED ); break;
401 case EBUSY: set_error( STATUS_FILE_LOCK_CONFLICT ); break;
402 case ENOENT: set_error( STATUS_NO_SUCH_FILE ); break;
403 case EISDIR: set_win32_error( ERROR_CANNOT_MAKE ); break;
405 case EMFILE: set_error( STATUS_NO_MORE_FILES ); break;
406 case EEXIST: set_error( STATUS_OBJECT_NAME_COLLISION ); break;
407 case EINVAL: set_error( STATUS_INVALID_PARAMETER ); break;
408 case ESPIPE: set_win32_error( ERROR_SEEK ); break;
409 case ENOTEMPTY: set_error( STATUS_DIRECTORY_NOT_EMPTY ); break;
410 case EIO: set_error( STATUS_ACCESS_VIOLATION ); break;
411 case ENOTDIR: set_error( STATUS_NOT_A_DIRECTORY ); break;
413 case EOVERFLOW: set_error( STATUS_INVALID_PARAMETER ); break;
415 default: perror("file_set_error"); set_win32_error( ERROR_UNKNOWN ); break;
419 struct file *get_file_obj( struct process *process, obj_handle_t handle, unsigned int access )
421 return (struct file *)get_handle_obj( process, handle, access, &file_ops );
424 int get_file_unix_fd( struct file *file )
426 return get_unix_fd( file->fd );
429 static int set_file_pointer( obj_handle_t handle, unsigned int *low, int *high, int whence )
434 xto = *low+((off_t)*high<<32);
435 if (!(file = get_file_obj( current->process, handle, 0 )))
437 if ((result = lseek( get_file_unix_fd(file), xto, whence))==-1)
439 /* Check for seek before start of file */
441 /* also check EPERM due to SuSE7 2.2.16 lseek() EPERM kernel bug */
442 if (((errno == EINVAL) || (errno == EPERM))
443 && (whence != SEEK_SET) && (*high < 0))
444 set_win32_error( ERROR_NEGATIVE_SEEK );
447 release_object( file );
450 *low = result & 0xffffffff;
451 *high = result >> 32;
452 release_object( file );
456 /* extend a file beyond the current end of file */
457 static int extend_file( struct file *file, off_t size )
459 static const char zero;
460 int unix_fd = get_file_unix_fd( file );
462 /* extend the file one byte beyond the requested size and then truncate it */
463 /* this should work around ftruncate implementations that can't extend files */
464 if ((lseek( unix_fd, size, SEEK_SET ) != -1) &&
465 (write( unix_fd, &zero, 1 ) != -1))
467 ftruncate( unix_fd, size );
474 /* truncate file at current position */
475 static int truncate_file( struct file *file )
478 int unix_fd = get_file_unix_fd( file );
479 off_t pos = lseek( unix_fd, 0, SEEK_CUR );
480 off_t eof = lseek( unix_fd, 0, SEEK_END );
482 if (eof < pos) ret = extend_file( file, pos );
485 if (ftruncate( unix_fd, pos ) != -1) ret = 1;
486 else file_set_error();
488 lseek( unix_fd, pos, SEEK_SET ); /* restore file pos */
492 /* try to grow the file to the specified size */
493 int grow_file( struct file *file, int size_high, int size_low )
497 int unix_fd = get_file_unix_fd( file );
498 off_t old_pos, size = size_low + (((off_t)size_high)<<32);
500 if (fstat( unix_fd, &st ) == -1)
505 if (st.st_size >= size) return 1; /* already large enough */
506 old_pos = lseek( unix_fd, 0, SEEK_CUR ); /* save old pos */
507 ret = extend_file( file, size );
508 lseek( unix_fd, old_pos, SEEK_SET ); /* restore file pos */
513 DECL_HANDLER(create_file)
518 if ((file = create_file( get_req_data(), get_req_data_size(), req->access,
519 req->sharing, req->create, req->options, req->attrs )))
521 reply->handle = alloc_handle( current->process, file, req->access, req->inherit );
522 release_object( file );
526 /* allocate a file handle for a Unix fd */
527 DECL_HANDLER(alloc_file_handle)
533 if ((fd = thread_get_inflight_fd( current, req->fd )) == -1)
535 set_error( STATUS_INVALID_HANDLE );
538 if ((file = create_file_for_fd( fd, req->access, FILE_SHARE_READ | FILE_SHARE_WRITE )))
540 reply->handle = alloc_handle( current->process, file, req->access, req->inherit );
541 release_object( file );
545 /* set a file current position */
546 DECL_HANDLER(set_file_pointer)
548 int high = req->high;
550 set_file_pointer( req->handle, &low, &high, req->whence );
551 reply->new_low = low;
552 reply->new_high = high;
555 /* truncate (or extend) a file */
556 DECL_HANDLER(truncate_file)
560 if ((file = get_file_obj( current->process, req->handle, GENERIC_WRITE )))
562 truncate_file( file );
563 release_object( file );
567 /* lock a region of a file */
568 DECL_HANDLER(lock_file)
571 file_pos_t offset = ((file_pos_t)req->offset_high << 32) | req->offset_low;
572 file_pos_t count = ((file_pos_t)req->count_high << 32) | req->count_low;
574 if ((file = get_file_obj( current->process, req->handle, 0 )))
576 reply->handle = lock_fd( file->fd, offset, count, req->shared, req->wait );
577 reply->overlapped = is_overlapped( file );
578 release_object( file );
582 /* unlock a region of a file */
583 DECL_HANDLER(unlock_file)
586 file_pos_t offset = ((file_pos_t)req->offset_high << 32) | req->offset_low;
587 file_pos_t count = ((file_pos_t)req->count_high << 32) | req->count_low;
589 if ((file = get_file_obj( current->process, req->handle, 0 )))
591 unlock_fd( file->fd, offset, count );
592 release_object( file );