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ntdll: Add support for the FILE_OPEN_BY_FILE_ID flag in NtCreateFile.

This commit is contained in:
Alexandre Julliard 2009-12-02 17:35:43 +01:00
parent 6677565f34
commit 9c789f4025
3 changed files with 87 additions and 1 deletions
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80
dlls/ntdll/directory.c
View File

@ -2217,6 +2217,86 @@ static inline int get_dos_prefix_len( const UNICODE_STRING *name )
}
/******************************************************************************
* file_id_to_unix_file_name
*
* Lookup a file from its file id instead of its name.
*/
NTSTATUS file_id_to_unix_file_name( const OBJECT_ATTRIBUTES *attr, ANSI_STRING *unix_name_ret )
{
enum server_fd_type type;
int old_cwd, root_fd, needs_close;
char *unix_name;
int unix_len;
NTSTATUS status;
ULONGLONG file_id;
struct stat st, root_st;
DIR *dir;
struct dirent *de;
if (attr->ObjectName->Length != sizeof(ULONGLONG)) return STATUS_OBJECT_PATH_SYNTAX_BAD;
if (!attr->RootDirectory) return STATUS_INVALID_PARAMETER;
memcpy( &file_id, attr->ObjectName->Buffer, sizeof(file_id) );
unix_len = MAX_DIR_ENTRY_LEN + 1;
if (!(unix_name = RtlAllocateHeap( GetProcessHeap(), 0, unix_len )))
return STATUS_NO_MEMORY;
unix_name[0] = 0;
if (!(status = server_get_unix_fd( attr->RootDirectory, FILE_READ_DATA, &root_fd,
&needs_close, &type, NULL )))
{
if (type != FD_TYPE_DIR)
{
if (needs_close) close( root_fd );
status = STATUS_OBJECT_TYPE_MISMATCH;
}
else
{
fstat( root_fd, &root_st );
RtlEnterCriticalSection( &dir_section );
if ((old_cwd = open( ".", O_RDONLY )) != -1 && fchdir( root_fd ) != -1)
{
if (!(dir = opendir( "." ))) status = FILE_GetNtStatus();
else
{
while ((de = readdir( dir )))
{
if (stat( de->d_name, &st ) == -1) continue;
if (st.st_dev == root_st.st_dev && st.st_ino == file_id)
{
strcpy( unix_name, de->d_name );
break;
}
}
closedir( dir );
if (!unix_name[0]) status = STATUS_OBJECT_NAME_NOT_FOUND;
}
if (fchdir( old_cwd ) == -1) chdir( "/" );
}
else status = FILE_GetNtStatus();
RtlLeaveCriticalSection( &dir_section );
if (old_cwd != -1) close( old_cwd );
if (needs_close) close( root_fd );
}
}
if (status == STATUS_SUCCESS)
{
TRACE( "%s -> %s\n", wine_dbgstr_longlong(file_id), debugstr_a(unix_name) );
unix_name_ret->Buffer = unix_name;
unix_name_ret->Length = strlen(unix_name);
unix_name_ret->MaximumLength = unix_len;
}
else
{
TRACE( "%s not found in %s\n", wine_dbgstr_longlong(file_id), unix_name );
RtlFreeHeap( GetProcessHeap(), 0, unix_name );
}
return status;
}
/******************************************************************************
* lookup_unix_name
*

7
dlls/ntdll/file.c
View File

@ -115,7 +115,12 @@ static NTSTATUS FILE_CreateFile( PHANDLE handle, ACCESS_MASK access, POBJECT_ATT
if (alloc_size) FIXME( "alloc_size not supported\n" );
if ((io->u.Status = nt_to_unix_file_name_attr( attr, &unix_name, disposition )) == STATUS_BAD_DEVICE_TYPE)
if (options & FILE_OPEN_BY_FILE_ID)
io->u.Status = file_id_to_unix_file_name( attr, &unix_name );
else
io->u.Status = nt_to_unix_file_name_attr( attr, &unix_name, disposition );
if (io->u.Status == STATUS_BAD_DEVICE_TYPE)
{
SERVER_START_REQ( open_file_object )
{

1
dlls/ntdll/ntdll_misc.h
View File

@ -147,6 +147,7 @@ extern BOOL DIR_is_hidden_file( const UNICODE_STRING *name );
extern NTSTATUS DIR_unmount_device( HANDLE handle );
extern NTSTATUS DIR_get_unix_cwd( char **cwd );
extern unsigned int DIR_get_drives_info( struct drive_info info[MAX_DOS_DRIVES] );
extern NTSTATUS file_id_to_unix_file_name( const OBJECT_ATTRIBUTES *attr, ANSI_STRING *unix_name_ret );
extern NTSTATUS nt_to_unix_file_name_attr( const OBJECT_ATTRIBUTES *attr, ANSI_STRING *unix_name_ret,
UINT disposition );