void filecopy()
{
int fd1,fd2;
fd1=open("cat.c",O_RDWR);
fd2=open("ccc",O_RDWR);
filecp(fd1,fd2);
// printf("%d %d",fd1,fd2);
close(fd1);
close(fd2);
}
static VALUE
win32_readlink(const char* file)
{
VALUE error = Qnil;
VALUE target = Qnil;
HANDLE h = INVALID_HANDLE_VALUE;
bool ok = true;
REPARSE_DATA_BUFFER* buf = NULL;
const size_t buf_size = MAXIMUM_REPARSE_DATA_BUFFER_SIZE;
buf = (REPARSE_DATA_BUFFER*)xmalloc(buf_size);
if(ok)
{
const DWORD share_mode = FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE;
const DWORD access_mode = FILE_READ_EA;
const DWORD attributes =
FILE_FLAG_BACKUP_SEMANTICS
| FILE_ATTRIBUTE_REPARSE_POINT
| FILE_FLAG_OPEN_REPARSE_POINT;
h = CreateFile( file, access_mode, share_mode,
0, OPEN_EXISTING, attributes, NULL);
if(!(ok = (h != INVALID_HANDLE_VALUE)))
{
error = make_api_error(file);
}
}
if(ok)
{
DWORD returned_size;
ok = 0 != DeviceIoControl (h, FSCTL_GET_REPARSE_POINT,
NULL, 0, buf, buf_size, &returned_size, NULL);
if(!ok)
{
error = make_api_error(file);
}
}
if(ok)
{
wchar_t* raw_target = NULL;
long target_len = 0;
switch (buf->ReparseTag)
{
case IO_REPARSE_TAG_MOUNT_POINT:
{
raw_target = &buf->MountPointReparseBuffer.PathBuffer[
buf->MountPointReparseBuffer.SubstituteNameOffset / sizeof(wchar_t)];
target_len = buf->MountPointReparseBuffer.SubstituteNameLength / sizeof(wchar_t);
break;
}
case IO_REPARSE_TAG_SYMLINK:
{
raw_target = &buf->SymbolicLinkReparseBuffer.PathBuffer[
buf->SymbolicLinkReparseBuffer.SubstituteNameOffset / sizeof(wchar_t)];
target_len = buf->SymbolicLinkReparseBuffer.SubstituteNameLength / sizeof(wchar_t);
break;
}
default:
ok = false;
error = make_error_str(rb_eIOError, "file %s is not a symlink", file);
}
if(ok)
{
wchar_t* resolved;
resolved = resolve_api_path(raw_target);
target_len -= resolved - raw_target;
target = wstr_to_str(filecp(), resolved, target_len);
}
}
if( h != INVALID_HANDLE_VALUE )
{
CloseHandle(h);
}
xfree(buf);
if( !NIL_P(error) )
{
rb_exc_raise(error);
}
return target;
}