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"
30 #ifdef HAVE_SYS_ERRNO_H
31 #include <sys/errno.h>
35 #include <sys/types.h>
50 struct object obj
; /* object header */
51 struct file
*next
; /* next file in hashing list */
52 char *name
; /* file name */
53 unsigned int access
; /* file access (GENERIC_READ/WRITE) */
54 unsigned int flags
; /* flags (FILE_FLAG_*) */
55 unsigned int sharing
; /* file sharing mode */
56 int drive_type
; /* type of drive the file is on */
57 struct async_queue read_q
;
58 struct async_queue write_q
;
61 #define NAME_HASH_SIZE 37
63 static struct file
*file_hash
[NAME_HASH_SIZE
];
65 static void file_dump( struct object
*obj
, int verbose
);
66 static int file_get_poll_events( struct object
*obj
);
67 static void file_poll_event( struct object
*obj
, int event
);
68 static int file_get_fd( struct object
*obj
);
69 static int file_flush( struct object
*obj
);
70 static int file_get_info( struct object
*obj
, struct get_file_info_reply
*reply
, int *flags
);
71 static void file_destroy( struct object
*obj
);
72 static struct async_queue
* file_queue_async(struct object
*obj
, struct async
* async
, int type
, int count
);
74 static const struct object_ops file_ops
=
76 sizeof(struct file
), /* size */
78 default_poll_add_queue
, /* add_queue */
79 default_poll_remove_queue
, /* remove_queue */
80 default_poll_signaled
, /* signaled */
81 no_satisfied
, /* satisfied */
82 file_get_poll_events
, /* get_poll_events */
83 file_poll_event
, /* poll_event */
84 file_get_fd
, /* get_fd */
85 file_flush
, /* flush */
86 file_get_info
, /* get_file_info */
87 file_queue_async
, /* queue_async */
88 file_destroy
/* destroy */
92 static int get_name_hash( const char *name
)
95 while (*name
) hash
^= (unsigned char)*name
++;
96 return hash
% NAME_HASH_SIZE
;
99 /* check if the desired access is possible without violating */
100 /* the sharing mode of other opens of the same file */
101 static int check_sharing( const char *name
, int hash
, unsigned int access
,
102 unsigned int sharing
)
105 unsigned int existing_sharing
= FILE_SHARE_READ
| FILE_SHARE_WRITE
;
106 unsigned int existing_access
= 0;
108 for (file
= file_hash
[hash
]; file
; file
= file
->next
)
110 if (strcmp( file
->name
, name
)) continue;
111 existing_sharing
&= file
->sharing
;
112 existing_access
|= file
->access
;
114 if ((access
& GENERIC_READ
) && !(existing_sharing
& FILE_SHARE_READ
)) goto error
;
115 if ((access
& GENERIC_WRITE
) && !(existing_sharing
& FILE_SHARE_WRITE
)) goto error
;
116 if ((existing_access
& GENERIC_READ
) && !(sharing
& FILE_SHARE_READ
)) goto error
;
117 if ((existing_access
& GENERIC_WRITE
) && !(sharing
& FILE_SHARE_WRITE
)) goto error
;
120 set_error( STATUS_SHARING_VIOLATION
);
124 /* create a file from a file descriptor */
125 /* if the function fails the fd is closed */
126 static struct file
*create_file_for_fd( int fd
, unsigned int access
, unsigned int sharing
,
127 unsigned int attrs
, int drive_type
)
130 if ((file
= alloc_object( &file_ops
, fd
)))
134 file
->access
= access
;
136 file
->sharing
= sharing
;
137 file
->drive_type
= drive_type
;
138 if (file
->flags
& FILE_FLAG_OVERLAPPED
)
140 init_async_queue (&file
->read_q
);
141 init_async_queue (&file
->write_q
);
148 static struct file
*create_file( const char *nameptr
, size_t len
, unsigned int access
,
149 unsigned int sharing
, int create
, unsigned int attrs
,
159 if (!(name
= mem_alloc( len
+ 1 ))) return NULL
;
160 memcpy( name
, nameptr
, len
);
163 /* check sharing mode */
164 hash
= get_name_hash( name
);
165 if (!check_sharing( name
, hash
, access
, sharing
)) goto error
;
169 case CREATE_NEW
: flags
= O_CREAT
| O_EXCL
; break;
170 case CREATE_ALWAYS
: flags
= O_CREAT
| O_TRUNC
; break;
171 case OPEN_ALWAYS
: flags
= O_CREAT
; break;
172 case TRUNCATE_EXISTING
: flags
= O_TRUNC
; break;
173 case OPEN_EXISTING
: flags
= 0; break;
174 default: set_error( STATUS_INVALID_PARAMETER
); goto error
;
176 switch(access
& (GENERIC_READ
| GENERIC_WRITE
))
179 case GENERIC_READ
: flags
|= O_RDONLY
; break;
180 case GENERIC_WRITE
: flags
|= O_WRONLY
; break;
181 case GENERIC_READ
|GENERIC_WRITE
: flags
|= O_RDWR
; break;
183 mode
= (attrs
& FILE_ATTRIBUTE_READONLY
) ? 0444 : 0666;
186 (!strcasecmp( name
+ len
- 4, ".exe" ) || !strcasecmp( name
+ len
- 4, ".com" )))
189 /* FIXME: should set error to STATUS_OBJECT_NAME_COLLISION if file existed before */
190 if ((fd
= open( name
, flags
| O_NONBLOCK
| O_LARGEFILE
, mode
)) == -1 )
192 /* refuse to open a directory */
193 if (fstat( fd
, &st
) == -1) goto file_error
;
194 if (S_ISDIR(st
.st_mode
))
196 set_error( STATUS_ACCESS_DENIED
);
200 if (!(file
= create_file_for_fd( fd
, access
, sharing
, attrs
, drive_type
)))
206 file
->next
= file_hash
[hash
];
207 file_hash
[hash
] = file
;
213 if (fd
!= -1) close( fd
);
218 /* check if two file objects point to the same file */
219 int is_same_file( struct file
*file1
, struct file
*file2
)
221 return !strcmp( file1
->name
, file2
->name
);
224 /* get the type of drive the file is on */
225 int get_file_drive_type( struct file
*file
)
227 return file
->drive_type
;
230 /* Create an anonymous Unix file */
231 int create_anonymous_file(void)
238 if (!(name
= tmpnam(NULL
)))
240 set_error( STATUS_TOO_MANY_OPENED_FILES
);
243 fd
= open( name
, O_CREAT
| O_EXCL
| O_RDWR
, 0600 );
244 } while ((fd
== -1) && (errno
== EEXIST
));
254 /* Create a temp file for anonymous mappings */
255 struct file
*create_temp_file( int access
)
259 if ((fd
= create_anonymous_file()) == -1) return NULL
;
260 return create_file_for_fd( fd
, access
, 0, 0, DRIVE_FIXED
);
263 static void file_dump( struct object
*obj
, int verbose
)
265 struct file
*file
= (struct file
*)obj
;
266 assert( obj
->ops
== &file_ops
);
267 fprintf( stderr
, "File fd=%d flags=%08x name='%s'\n", file
->obj
.fd
, file
->flags
, file
->name
);
270 static int file_get_poll_events( struct object
*obj
)
272 struct file
*file
= (struct file
*)obj
;
274 assert( obj
->ops
== &file_ops
);
275 if (file
->access
& GENERIC_READ
) events
|= POLLIN
;
276 if (file
->access
& GENERIC_WRITE
) events
|= POLLOUT
;
280 static void file_poll_event( struct object
*obj
, int event
)
282 struct file
*file
= (struct file
*)obj
;
283 assert( obj
->ops
== &file_ops
);
284 if ( file
->flags
& FILE_FLAG_OVERLAPPED
)
286 if( IS_READY(file
->read_q
) && (POLLIN
& event
) )
288 async_notify(file
->read_q
.head
, STATUS_ALERTED
);
291 if( IS_READY(file
->write_q
) && (POLLOUT
& event
) )
293 async_notify(file
->write_q
.head
, STATUS_ALERTED
);
297 default_poll_event( obj
, event
);
301 static int file_get_fd( struct object
*obj
)
303 struct file
*file
= (struct file
*)obj
;
304 assert( obj
->ops
== &file_ops
);
308 static int file_flush( struct object
*obj
)
311 struct file
*file
= (struct file
*)grab_object(obj
);
312 assert( obj
->ops
== &file_ops
);
314 ret
= (fsync( file
->obj
.fd
) != -1);
315 if (!ret
) file_set_error();
316 release_object( file
);
320 static int file_get_info( struct object
*obj
, struct get_file_info_reply
*reply
, int *flags
)
323 struct file
*file
= (struct file
*)obj
;
324 assert( obj
->ops
== &file_ops
);
328 if (fstat( file
->obj
.fd
, &st
) == -1)
331 return FD_TYPE_INVALID
;
333 if (S_ISCHR(st
.st_mode
) || S_ISFIFO(st
.st_mode
) ||
334 S_ISSOCK(st
.st_mode
) || isatty(file
->obj
.fd
)) reply
->type
= FILE_TYPE_CHAR
;
335 else reply
->type
= FILE_TYPE_DISK
;
336 if (S_ISDIR(st
.st_mode
)) reply
->attr
= FILE_ATTRIBUTE_DIRECTORY
;
337 else reply
->attr
= FILE_ATTRIBUTE_ARCHIVE
;
338 if (!(st
.st_mode
& S_IWUSR
)) reply
->attr
|= FILE_ATTRIBUTE_READONLY
;
339 reply
->access_time
= st
.st_atime
;
340 reply
->write_time
= st
.st_mtime
;
341 if (S_ISDIR(st
.st_mode
))
343 reply
->size_high
= 0;
348 reply
->size_high
= st
.st_size
>> 32;
349 reply
->size_low
= st
.st_size
& 0xffffffff;
351 reply
->links
= st
.st_nlink
;
352 reply
->index_high
= st
.st_dev
;
353 reply
->index_low
= st
.st_ino
;
354 reply
->serial
= 0; /* FIXME */
357 if (file
->flags
& FILE_FLAG_OVERLAPPED
) *flags
|= FD_FLAG_OVERLAPPED
;
358 return FD_TYPE_DEFAULT
;
361 static struct async_queue
*file_queue_async(struct object
*obj
, struct async
*async
, int type
, int count
)
363 struct file
*file
= (struct file
*)obj
;
364 struct async_queue
*q
;
366 assert( obj
->ops
== &file_ops
);
368 if ( !(file
->flags
& FILE_FLAG_OVERLAPPED
) )
370 set_error ( STATUS_INVALID_HANDLE
);
376 case ASYNC_TYPE_READ
:
379 case ASYNC_TYPE_WRITE
:
383 set_error( STATUS_INVALID_PARAMETER
);
387 if(async
&& !async
->q
)
388 async_insert(q
, async
);
393 static void file_destroy( struct object
*obj
)
395 struct file
*file
= (struct file
*)obj
;
396 assert( obj
->ops
== &file_ops
);
400 /* remove it from the hashing list */
401 struct file
**pptr
= &file_hash
[get_name_hash( file
->name
)];
402 while (*pptr
&& *pptr
!= file
) pptr
= &(*pptr
)->next
;
404 *pptr
= (*pptr
)->next
;
405 if (file
->flags
& FILE_FLAG_DELETE_ON_CLOSE
) unlink( file
->name
);
408 if (file
->flags
& FILE_FLAG_OVERLAPPED
)
410 destroy_async_queue (&file
->read_q
);
411 destroy_async_queue (&file
->write_q
);
415 /* set the last error depending on errno */
416 void file_set_error(void)
420 case EAGAIN
: set_error( STATUS_SHARING_VIOLATION
); break;
421 case EBADF
: set_error( STATUS_INVALID_HANDLE
); break;
422 case ENOSPC
: set_error( STATUS_DISK_FULL
); break;
425 case EPERM
: set_error( STATUS_ACCESS_DENIED
); break;
426 case EROFS
: set_error( STATUS_MEDIA_WRITE_PROTECTED
); break;
427 case EBUSY
: set_error( STATUS_FILE_LOCK_CONFLICT
); break;
428 case ENOENT
: set_error( STATUS_NO_SUCH_FILE
); break;
429 case EISDIR
: set_error( 0xc0010000 | ERROR_CANNOT_MAKE
/* FIXME */ ); break;
431 case EMFILE
: set_error( STATUS_NO_MORE_FILES
); break;
432 case EEXIST
: set_error( STATUS_OBJECT_NAME_COLLISION
); break;
433 case EINVAL
: set_error( STATUS_INVALID_PARAMETER
); break;
434 case ESPIPE
: set_error( 0xc0010000 | ERROR_SEEK
/* FIXME */ ); break;
435 case ENOTEMPTY
: set_error( STATUS_DIRECTORY_NOT_EMPTY
); break;
436 case EIO
: set_error( STATUS_ACCESS_VIOLATION
); break;
437 default: perror("file_set_error"); set_error( ERROR_UNKNOWN
/* FIXME */ ); break;
441 struct file
*get_file_obj( struct process
*process
, handle_t handle
, unsigned int access
)
443 return (struct file
*)get_handle_obj( process
, handle
, access
, &file_ops
);
446 static int set_file_pointer( handle_t handle
, unsigned int *low
, int *high
, int whence
)
451 xto
= *low
+((off_t
)*high
<<32);
452 if (!(file
= get_file_obj( current
->process
, handle
, 0 )))
454 if ((result
= lseek(file
->obj
.fd
,xto
,whence
))==-1)
456 /* Check for seek before start of file */
458 /* also check EPERM due to SuSE7 2.2.16 lseek() EPERM kernel bug */
459 if (((errno
== EINVAL
) || (errno
== EPERM
))
460 && (whence
!= SEEK_SET
) && (*high
< 0))
461 set_error( 0xc0010000 | ERROR_NEGATIVE_SEEK
/* FIXME */ );
464 release_object( file
);
467 *low
= result
& 0xffffffff;
468 *high
= result
>> 32;
469 release_object( file
);
473 /* extend a file beyond the current end of file */
474 static int extend_file( struct file
*file
, off_t size
)
476 static const char zero
;
478 /* extend the file one byte beyond the requested size and then truncate it */
479 /* this should work around ftruncate implementations that can't extend files */
480 if ((lseek( file
->obj
.fd
, size
, SEEK_SET
) != -1) &&
481 (write( file
->obj
.fd
, &zero
, 1 ) != -1))
483 ftruncate( file
->obj
.fd
, size
);
490 /* truncate file at current position */
491 static int truncate_file( struct file
*file
)
494 off_t pos
= lseek( file
->obj
.fd
, 0, SEEK_CUR
);
495 off_t eof
= lseek( file
->obj
.fd
, 0, SEEK_END
);
497 if (eof
< pos
) ret
= extend_file( file
, pos
);
500 if (ftruncate( file
->obj
.fd
, pos
) != -1) ret
= 1;
501 else file_set_error();
503 lseek( file
->obj
.fd
, pos
, SEEK_SET
); /* restore file pos */
507 /* try to grow the file to the specified size */
508 int grow_file( struct file
*file
, int size_high
, int size_low
)
512 off_t old_pos
, size
= size_low
+ (((off_t
)size_high
)<<32);
514 if (fstat( file
->obj
.fd
, &st
) == -1)
519 if (st
.st_size
>= size
) return 1; /* already large enough */
520 old_pos
= lseek( file
->obj
.fd
, 0, SEEK_CUR
); /* save old pos */
521 ret
= extend_file( file
, size
);
522 lseek( file
->obj
.fd
, old_pos
, SEEK_SET
); /* restore file pos */
526 static int set_file_time( handle_t handle
, time_t access_time
, time_t write_time
)
529 struct utimbuf utimbuf
;
531 if (!(file
= get_file_obj( current
->process
, handle
, GENERIC_WRITE
)))
535 set_error( STATUS_INVALID_HANDLE
);
536 release_object( file
);
539 if (!access_time
|| !write_time
)
542 if (stat( file
->name
, &st
) == -1) goto error
;
543 if (!access_time
) access_time
= st
.st_atime
;
544 if (!write_time
) write_time
= st
.st_mtime
;
546 utimbuf
.actime
= access_time
;
547 utimbuf
.modtime
= write_time
;
548 if (utime( file
->name
, &utimbuf
) == -1) goto error
;
549 release_object( file
);
553 release_object( file
);
557 static int file_lock( struct file
*file
, int offset_high
, int offset_low
,
558 int count_high
, int count_low
)
560 /* FIXME: implement this */
564 static int file_unlock( struct file
*file
, int offset_high
, int offset_low
,
565 int count_high
, int count_low
)
567 /* FIXME: implement this */
572 DECL_HANDLER(create_file
)
577 if ((file
= create_file( get_req_data(), get_req_data_size(), req
->access
,
578 req
->sharing
, req
->create
, req
->attrs
, req
->drive_type
)))
580 reply
->handle
= alloc_handle( current
->process
, file
, req
->access
, req
->inherit
);
581 release_object( file
);
585 /* allocate a file handle for a Unix fd */
586 DECL_HANDLER(alloc_file_handle
)
592 if ((fd
= thread_get_inflight_fd( current
, req
->fd
)) == -1)
594 set_error( STATUS_INVALID_HANDLE
);
597 if ((file
= create_file_for_fd( fd
, req
->access
, FILE_SHARE_READ
| FILE_SHARE_WRITE
,
600 reply
->handle
= alloc_handle( current
->process
, file
, req
->access
, req
->inherit
);
601 release_object( file
);
605 /* get a Unix fd to access a file */
606 DECL_HANDLER(get_handle_fd
)
611 reply
->type
= FD_TYPE_INVALID
;
612 if ((obj
= get_handle_obj( current
->process
, req
->handle
, req
->access
, NULL
)))
614 int fd
= get_handle_fd( current
->process
, req
->handle
, req
->access
);
615 if (fd
!= -1) reply
->fd
= fd
;
616 else if (!get_error())
618 if ((fd
= obj
->ops
->get_fd( obj
)) != -1)
619 send_client_fd( current
->process
, fd
, req
->handle
);
621 reply
->type
= obj
->ops
->get_file_info( obj
, NULL
, &reply
->flags
);
622 release_object( obj
);
626 /* set a file current position */
627 DECL_HANDLER(set_file_pointer
)
629 int high
= req
->high
;
631 set_file_pointer( req
->handle
, &low
, &high
, req
->whence
);
632 reply
->new_low
= low
;
633 reply
->new_high
= high
;
636 /* truncate (or extend) a file */
637 DECL_HANDLER(truncate_file
)
641 if ((file
= get_file_obj( current
->process
, req
->handle
, GENERIC_WRITE
)))
643 truncate_file( file
);
644 release_object( file
);
648 /* flush a file buffers */
649 DECL_HANDLER(flush_file
)
653 if ((obj
= get_handle_obj( current
->process
, req
->handle
, 0, NULL
)))
655 obj
->ops
->flush( obj
);
656 release_object( obj
);
660 /* set a file access and modification times */
661 DECL_HANDLER(set_file_time
)
663 set_file_time( req
->handle
, req
->access_time
, req
->write_time
);
666 /* get a file information */
667 DECL_HANDLER(get_file_info
)
671 if ((obj
= get_handle_obj( current
->process
, req
->handle
, 0, NULL
)))
674 obj
->ops
->get_file_info( obj
, reply
, &flags
);
675 release_object( obj
);
679 /* lock a region of a file */
680 DECL_HANDLER(lock_file
)
684 if ((file
= get_file_obj( current
->process
, req
->handle
, 0 )))
686 file_lock( file
, req
->offset_high
, req
->offset_low
,
687 req
->count_high
, req
->count_low
);
688 release_object( file
);
692 /* unlock a region of a file */
693 DECL_HANDLER(unlock_file
)
697 if ((file
= get_file_obj( current
->process
, req
->handle
, 0 )))
699 file_unlock( file
, req
->offset_high
, req
->offset_low
,
700 req
->count_high
, req
->count_low
);
701 release_object( file
);