Fix for #3464
Jakob Eriksson
jakob at vmlinux.org
Thu Oct 13 05:23:21 CDT 2005
Can I create b: on the fly, allocate 1.44 megabyte RAM, do all copies
there and then
copy it back?
Am I on crack?
regards,
Jakob
Eric Pouech wrote:
> It turns out that DOS' ioctl 0x440F (set logical drive map) was
> strangely implemented. From the doc I have, this ioctl is responsible
> for setting the logical drive to access a physical drive. This is used
> for example, on a single floppy PC when implementing the copy a:foo
> b:bar command, where a: and b: refer to the same physical device (the
> floppy), and this ioctl is called to toggle the access from a: or b:
> to the physical device.
> This implies that this ioctl is not responsible for creating the
> mapping of a: and b: to the same physical device.
> The current implementation was trying to achieve this goal and
> moreover it was done in the wrong way :-/
> The attached patch removes altogether the support for logical drive
> map in int21h (and fixed Myst BTW).
>
> A+
>
>------------------------------------------------------------------------
>
>Name: int21_mapdrv
>ChangeLog: ioctl 440F only returns non mapped drives (for now)
>License: X11
>GenDate: 2005/10/12 18:41:20 UTC
>ModifiedFiles: dlls/winedos/int21.c
>AddedFiles:
>RemovedFiles:
>===================================================================
>RCS file: /home/cvs/cvsroot/wine/wine/dlls/winedos/int21.c,v
>retrieving revision 1.81
>diff -u -u -r1.81 int21.c
>--- dlls/winedos/int21.c 18 Sep 2005 11:11:36 -0000 1.81
>+++ dlls/winedos/int21.c 12 Oct 2005 18:40:47 -0000
>@@ -2627,19 +2627,12 @@
> break;
>
> case 0x0f: /* SET LOGICAL DRIVE MAP */
>- {
>- WCHAR dev[3], tgt[4];
>+ TRACE("IOCTL - SET LOGICAL DRIVE MAP for drive %s\n",
>+ INT21_DriveName( BL_reg(context)));
>
>- TRACE("IOCTL - SET LOGICAL DRIVE MAP for drive %s\n",
>- INT21_DriveName( BL_reg(context)));
>- dev[0] = 'A' + drive; dev[1] = ':'; dev[2] = 0;
>- tgt[0] = 'A' + drive + 1; tgt[1] = ':'; tgt[2] = '\\'; tgt[3] = 0;
>- if (!DefineDosDeviceW(DDD_RAW_TARGET_PATH, dev, tgt))
>- {
>- SET_CFLAG(context);
>- SET_AX( context, 0x000F ); /* invalid drive */
>- }
>- }
>+ /* FIXME: as of today, we don't support logical drive mapping...
>+ */
>+ SET_AL( context, 0 );
> break;
>
> case 0x11: /* QUERY GENERIC IOCTL CAPABILITY */
>
>
>------------------------------------------------------------------------
>
>
>
>
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