2 * Server-side file management
4 * Copyright (C) 1998 Alexandre Julliard
16 #ifdef HAVE_SYS_ERRNO_H
17 #include <sys/errno.h>
21 #include <sys/types.h>
35 struct object obj; /* object header */
36 struct file *next; /* next file in hashing list */
37 char *name; /* file name */
38 unsigned int access; /* file access (GENERIC_READ/WRITE) */
39 unsigned int flags; /* flags (FILE_FLAG_*) */
40 unsigned int sharing; /* file sharing mode */
43 #define NAME_HASH_SIZE 37
45 static struct file *file_hash[NAME_HASH_SIZE];
47 static void file_dump( struct object *obj, int verbose );
48 static int file_get_poll_events( struct object *obj );
49 static int file_get_fd( struct object *obj );
50 static int file_flush( struct object *obj );
51 static int file_get_info( struct object *obj, struct get_file_info_request *req );
52 static void file_destroy( struct object *obj );
54 static const struct object_ops file_ops =
56 sizeof(struct file), /* size */
58 default_poll_add_queue, /* add_queue */
59 default_poll_remove_queue, /* remove_queue */
60 default_poll_signaled, /* signaled */
61 no_satisfied, /* satisfied */
62 file_get_poll_events, /* get_poll_events */
63 default_poll_event, /* poll_event */
64 file_get_fd, /* get_fd */
65 file_flush, /* flush */
66 file_get_info, /* get_file_info */
67 file_destroy /* destroy */
71 static int get_name_hash( const char *name )
74 while (*name) hash ^= (unsigned char)*name++;
75 return hash % NAME_HASH_SIZE;
78 /* check if the desired access is possible without violating */
79 /* the sharing mode of other opens of the same file */
80 static int check_sharing( const char *name, int hash, unsigned int access,
81 unsigned int sharing )
84 unsigned int existing_sharing = FILE_SHARE_READ | FILE_SHARE_WRITE;
85 unsigned int existing_access = 0;
87 for (file = file_hash[hash]; file; file = file->next)
89 if (strcmp( file->name, name )) continue;
90 existing_sharing &= file->sharing;
91 existing_access |= file->access;
93 if ((access & GENERIC_READ) && !(existing_sharing & FILE_SHARE_READ)) goto error;
94 if ((access & GENERIC_WRITE) && !(existing_sharing & FILE_SHARE_WRITE)) goto error;
95 if ((existing_access & GENERIC_READ) && !(sharing & FILE_SHARE_READ)) goto error;
96 if ((existing_access & GENERIC_WRITE) && !(sharing & FILE_SHARE_WRITE)) goto error;
99 set_error( STATUS_SHARING_VIOLATION );
103 /* create a file from a file descriptor */
104 /* if the function fails the fd is closed */
105 static struct file *create_file_for_fd( int fd, unsigned int access, unsigned int sharing,
109 if ((file = alloc_object( &file_ops, fd )))
113 file->access = access;
115 file->sharing = sharing;
121 static struct file *create_file( const char *nameptr, size_t len, unsigned int access,
122 unsigned int sharing, int create, unsigned int attrs )
131 if (!(name = mem_alloc( len + 1 ))) return NULL;
132 memcpy( name, nameptr, len );
135 /* check sharing mode */
136 hash = get_name_hash( name );
137 if (!check_sharing( name, hash, access, sharing )) goto error;
141 case CREATE_NEW: flags = O_CREAT | O_EXCL; break;
142 case CREATE_ALWAYS: flags = O_CREAT | O_TRUNC; break;
143 case OPEN_ALWAYS: flags = O_CREAT; break;
144 case TRUNCATE_EXISTING: flags = O_TRUNC; break;
145 case OPEN_EXISTING: flags = 0; break;
146 default: set_error( STATUS_INVALID_PARAMETER ); goto error;
148 switch(access & (GENERIC_READ | GENERIC_WRITE))
151 case GENERIC_READ: flags |= O_RDONLY; break;
152 case GENERIC_WRITE: flags |= O_WRONLY; break;
153 case GENERIC_READ|GENERIC_WRITE: flags |= O_RDWR; break;
155 mode = (attrs & FILE_ATTRIBUTE_READONLY) ? 0444 : 0666;
158 (!strcasecmp( name + len - 4, ".exe" ) || !strcasecmp( name + len - 4, ".com" )))
161 /* FIXME: should set error to STATUS_OBJECT_NAME_COLLISION if file existed before */
162 if ((fd = open( name, flags | O_NONBLOCK | O_LARGEFILE, mode )) == -1 )
164 /* refuse to open a directory */
165 if (fstat( fd, &st ) == -1) goto file_error;
166 if (S_ISDIR(st.st_mode))
168 set_error( STATUS_ACCESS_DENIED );
172 if (!(file = create_file_for_fd( fd, access, sharing, attrs )))
178 file->next = file_hash[hash];
179 file_hash[hash] = file;
185 if (fd != -1) close( fd );
190 /* check if two file objects point to the same file */
191 int is_same_file( struct file *file1, struct file *file2 )
193 return !strcmp( file1->name, file2->name );
196 /* Create an anonymous Unix file */
197 int create_anonymous_file(void)
204 if (!(name = tmpnam(NULL)))
206 set_error( STATUS_TOO_MANY_OPENED_FILES );
209 fd = open( name, O_CREAT | O_EXCL | O_RDWR, 0600 );
210 } while ((fd == -1) && (errno == EEXIST));
220 /* Create a temp file for anonymous mappings */
221 struct file *create_temp_file( int access )
225 if ((fd = create_anonymous_file()) == -1) return NULL;
226 return create_file_for_fd( fd, access, 0, 0 );
229 static void file_dump( struct object *obj, int verbose )
231 struct file *file = (struct file *)obj;
232 assert( obj->ops == &file_ops );
233 fprintf( stderr, "File fd=%d flags=%08x name='%s'\n", file->obj.fd, file->flags, file->name );
236 static int file_get_poll_events( struct object *obj )
238 struct file *file = (struct file *)obj;
240 assert( obj->ops == &file_ops );
241 if (file->access & GENERIC_READ) events |= POLLIN;
242 if (file->access & GENERIC_WRITE) events |= POLLOUT;
246 static int file_get_fd( struct object *obj )
248 struct file *file = (struct file *)obj;
249 assert( obj->ops == &file_ops );
253 static int file_flush( struct object *obj )
256 struct file *file = (struct file *)grab_object(obj);
257 assert( obj->ops == &file_ops );
259 ret = (fsync( file->obj.fd ) != -1);
260 if (!ret) file_set_error();
261 release_object( file );
265 static int file_get_info( struct object *obj, struct get_file_info_request *req )
268 struct file *file = (struct file *)obj;
269 assert( obj->ops == &file_ops );
271 if (fstat( file->obj.fd, &st ) == -1)
276 if (S_ISCHR(st.st_mode) || S_ISFIFO(st.st_mode) ||
277 S_ISSOCK(st.st_mode) || isatty(file->obj.fd)) req->type = FILE_TYPE_CHAR;
278 else req->type = FILE_TYPE_DISK;
279 if (S_ISDIR(st.st_mode)) req->attr = FILE_ATTRIBUTE_DIRECTORY;
280 else req->attr = FILE_ATTRIBUTE_ARCHIVE;
281 if (!(st.st_mode & S_IWUSR)) req->attr |= FILE_ATTRIBUTE_READONLY;
282 req->access_time = st.st_atime;
283 req->write_time = st.st_mtime;
284 if (S_ISDIR(st.st_mode))
291 req->size_high = st.st_size >> 32;
292 req->size_low = st.st_size & 0xffffffff;
294 req->links = st.st_nlink;
295 req->index_high = st.st_dev;
296 req->index_low = st.st_ino;
297 req->serial = 0; /* FIXME */
301 static void file_destroy( struct object *obj )
303 struct file *file = (struct file *)obj;
304 assert( obj->ops == &file_ops );
308 /* remove it from the hashing list */
309 struct file **pptr = &file_hash[get_name_hash( file->name )];
310 while (*pptr && *pptr != file) pptr = &(*pptr)->next;
312 *pptr = (*pptr)->next;
313 if (file->flags & FILE_FLAG_DELETE_ON_CLOSE) unlink( file->name );
318 /* set the last error depending on errno */
319 void file_set_error(void)
323 case EAGAIN: set_error( STATUS_SHARING_VIOLATION ); break;
324 case EBADF: set_error( STATUS_INVALID_HANDLE ); break;
325 case ENOSPC: set_error( STATUS_DISK_FULL ); break;
328 case EPERM: set_error( STATUS_ACCESS_DENIED ); break;
329 case EROFS: set_error( STATUS_MEDIA_WRITE_PROTECTED ); break;
330 case EBUSY: set_error( STATUS_FILE_LOCK_CONFLICT ); break;
331 case ENOENT: set_error( STATUS_NO_SUCH_FILE ); break;
332 case EISDIR: set_error( 0xc0010000 | ERROR_CANNOT_MAKE /* FIXME */ ); break;
334 case EMFILE: set_error( STATUS_NO_MORE_FILES ); break;
335 case EEXIST: set_error( STATUS_OBJECT_NAME_COLLISION ); break;
336 case EINVAL: set_error( STATUS_INVALID_PARAMETER ); break;
337 case ESPIPE: set_error( 0xc0010000 | ERROR_SEEK /* FIXME */ ); break;
338 case ENOTEMPTY: set_error( STATUS_DIRECTORY_NOT_EMPTY ); break;
339 case EIO: set_error( STATUS_ACCESS_VIOLATION ); break;
340 default: perror("file_set_error"); set_error( ERROR_UNKNOWN /* FIXME */ ); break;
344 struct file *get_file_obj( struct process *process, handle_t handle, unsigned int access )
346 return (struct file *)get_handle_obj( process, handle, access, &file_ops );
349 static int set_file_pointer( handle_t handle, unsigned int *low, int *high, int whence )
354 xto = *low+((off_t)*high<<32);
355 if (!(file = get_file_obj( current->process, handle, 0 )))
357 if ((result = lseek(file->obj.fd,xto,whence))==-1)
359 /* Check for seek before start of file */
361 /* also check EPERM due to SuSE7 2.2.16 lseek() EPERM kernel bug */
362 if (((errno == EINVAL) || (errno == EPERM))
363 && (whence != SEEK_SET) && (*high < 0))
364 set_error( 0xc0010000 | ERROR_NEGATIVE_SEEK /* FIXME */ );
367 release_object( file );
370 *low = result & 0xffffffff;
371 *high = result >> 32;
372 release_object( file );
376 static int truncate_file( handle_t handle )
381 if (!(file = get_file_obj( current->process, handle, GENERIC_WRITE )))
383 if (((result = lseek( file->obj.fd, 0, SEEK_CUR )) == -1) ||
384 (ftruncate( file->obj.fd, result ) == -1))
387 release_object( file );
390 release_object( file );
394 /* try to grow the file to the specified size */
395 int grow_file( struct file *file, int size_high, int size_low )
398 off_t size = size_low + (((off_t)size_high)<<32);
400 if (fstat( file->obj.fd, &st ) == -1)
405 if (st.st_size >= size) return 1; /* already large enough */
406 if (ftruncate( file->obj.fd, size ) != -1) return 1;
411 static int set_file_time( handle_t handle, time_t access_time, time_t write_time )
414 struct utimbuf utimbuf;
416 if (!(file = get_file_obj( current->process, handle, GENERIC_WRITE )))
420 set_error( STATUS_INVALID_HANDLE );
421 release_object( file );
424 if (!access_time || !write_time)
427 if (stat( file->name, &st ) == -1) goto error;
428 if (!access_time) access_time = st.st_atime;
429 if (!write_time) write_time = st.st_mtime;
431 utimbuf.actime = access_time;
432 utimbuf.modtime = write_time;
433 if (utime( file->name, &utimbuf ) == -1) goto error;
434 release_object( file );
438 release_object( file );
442 static int file_lock( struct file *file, int offset_high, int offset_low,
443 int count_high, int count_low )
445 /* FIXME: implement this */
449 static int file_unlock( struct file *file, int offset_high, int offset_low,
450 int count_high, int count_low )
452 /* FIXME: implement this */
457 DECL_HANDLER(create_file)
462 if ((file = create_file( get_req_data(req), get_req_data_size(req), req->access,
463 req->sharing, req->create, req->attrs )))
465 req->handle = alloc_handle( current->process, file, req->access, req->inherit );
466 release_object( file );
470 /* allocate a file handle for a Unix fd */
471 DECL_HANDLER(alloc_file_handle)
477 if ((fd = thread_get_inflight_fd( current, req->fd )) == -1)
479 set_error( STATUS_INVALID_HANDLE );
482 if ((file = create_file_for_fd( fd, req->access, FILE_SHARE_READ | FILE_SHARE_WRITE, 0 )))
484 req->handle = alloc_handle( current->process, file, req->access, 0 );
485 release_object( file );
489 /* get a Unix fd to access a file */
490 DECL_HANDLER(get_handle_fd)
495 if ((obj = get_handle_obj( current->process, req->handle, req->access, NULL )))
497 int fd = get_handle_fd( current->process, req->handle, req->access );
498 if (fd != -1) req->fd = fd;
499 else if (!get_error())
501 if ((fd = obj->ops->get_fd( obj )) != -1)
502 send_client_fd( current->process, fd, req->handle );
504 release_object( obj );
508 /* set a file current position */
509 DECL_HANDLER(set_file_pointer)
511 int high = req->high;
513 set_file_pointer( req->handle, &low, &high, req->whence );
515 req->new_high = high;
518 /* truncate (or extend) a file */
519 DECL_HANDLER(truncate_file)
521 truncate_file( req->handle );
524 /* flush a file buffers */
525 DECL_HANDLER(flush_file)
529 if ((obj = get_handle_obj( current->process, req->handle, 0, NULL )))
531 obj->ops->flush( obj );
532 release_object( obj );
536 /* set a file access and modification times */
537 DECL_HANDLER(set_file_time)
539 set_file_time( req->handle, req->access_time, req->write_time );
542 /* get a file information */
543 DECL_HANDLER(get_file_info)
547 if ((obj = get_handle_obj( current->process, req->handle, 0, NULL )))
549 obj->ops->get_file_info( obj, req );
550 release_object( obj );
554 /* lock a region of a file */
555 DECL_HANDLER(lock_file)
559 if ((file = get_file_obj( current->process, req->handle, 0 )))
561 file_lock( file, req->offset_high, req->offset_low,
562 req->count_high, req->count_low );
563 release_object( file );
567 /* unlock a region of a file */
568 DECL_HANDLER(unlock_file)
572 if ((file = get_file_obj( current->process, req->handle, 0 )))
574 file_unlock( file, req->offset_high, req->offset_low,
575 req->count_high, req->count_low );
576 release_object( file );