named memory-mapped file

[Leon Bogaert]

Hi all,

I don't know if this is the correct list. If it's not I'm sorry.

I have kind of a weird question. I'm playing this game iRacing which
exposed it's api via named memory map (
https://github.com/meltingice/node-iracing/blob/master/lib/irsdk_utils.cpp).

Is there a way I can access that named memory-mapped file via Linux? I did
some Googling and I don't think it's possible but I thought I made sure to
ask around here. If that isn't possible I think I'll write a simple program
that would run under wine and expose that data in a Linux-friendly manner.

Leon

[Leon Bogaert]

Just to clarify: the game runs under wine (crossover) on my Linux box.

On Saturday, March 21, 2015, Leon Bogaert <leonbogaert(a)gmail.com> wrote:
> Hi all,
>
> I don't know if this is the correct list. If it's not I'm sorry.
>
> I have kind of a weird question. I'm playing this game iRacing which
> exposed it's api via named memory map (
> https://github.com/meltingice/node-iracing/blob/master/lib/irsdk_utils.cpp
> ).
>
> Is there a way I can access that named memory-mapped file via Linux? I did
> some Googling and I don't think it's possible but I thought I made sure to
> ask around here. If that isn't possible I think I'll write a simple program
> that would run under wine and expose that data in a Linux-friendly manner.
>
> Leon

[Leon Bogaert]

The syscalls I need translated to linux are:
- OpenFileMappingW
- MapViewOfFile

Today I found out about winelib. I guess I could give that a go.

On Sat, Mar 21, 2015 at 6:49 PM, Leon Bogaert <leonbogaert(a)gmail.com> wrote:
> Just to clarify: the game runs under wine (crossover) on my Linux box.
>
> On Saturday, March 21, 2015, Leon Bogaert <leonbogaert(a)gmail.com> wrote:
> > Hi all,
> >
> > I don't know if this is the correct list. If it's not I'm sorry.
> >
> > I have kind of a weird question. I'm playing this game iRacing which
> > exposed it's api via named memory map (
> > https://github.com/meltingice/node-iracing/blob/master/lib/irsdk_utils.cpp
> > ).
> >
> > Is there a way I can access that named memory-mapped file via Linux? I
> > did some Googling and I don't think it's possible but I thought I made sure
> > to ask around here. If that isn't possible I think I'll write a simple
> > program that would run under wine and expose that data in a Linux-friendly
> > manner.
> >
> > Leon

[Andrew Eikum]

Hey Leon, sorry I missed your earlier emails.

I'm the primary developer of the official iRacing Linux port by
CodeWeavers, and I actually play it myself. I don't have the time to
dig into this right now, but I'm definitely interested in what you
find out and could maybe help with some questions. Depending on what
you end up with, we could maybe integrate your work back into the
official port.

I think what you want to do, at a high level, is find out how Wine
implements those methods on Linux. Then figure out how a Linux-native
application could hook into that implementation. Wine is, after all,
just a program running on Linux like any other.

Alternatively, you could write a win32 application and use those Wine
APIs to access the memory and do what you want, like you said.

Andrew

On Wed, Mar 25, 2015 at 01:18:40PM +0100, Leon Bogaert wrote:
> The syscalls I need translated to linux are:
> - OpenFileMappingW
> - MapViewOfFile
>
> Today I found out about winelib. I guess I could give that a go.
>
> On Sat, Mar 21, 2015 at 6:49 PM, Leon Bogaert <leonbogaert(a)gmail.com> wrote:
> > Just to clarify: the game runs under wine (crossover) on my Linux box.
> >
> > On Saturday, March 21, 2015, Leon Bogaert <leonbogaert(a)gmail.com> wrote:
> > > Hi all,
> > >
> > > I don't know if this is the correct list. If it's not I'm sorry.
> > >
> > > I have kind of a weird question. I'm playing this game iRacing which
> > > exposed it's api via named memory map (
> > > https://github.com/meltingice/node-iracing/blob/master/lib/irsdk_utils.cpp
> > > ).
> > >
> > > Is there a way I can access that named memory-mapped file via Linux? I
> > > did some Googling and I don't think it's possible but I thought I made sure
> > > to ask around here. If that isn't possible I think I'll write a simple
> > > program that would run under wine and expose that data in a Linux-friendly
> > > manner.
> > >
> > > Leon

[Stefan Dösinger]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Am 2015-03-25 um 13:18 schrieb Leon Bogaert:
> The syscalls I need translated to linux are:
> - OpenFileMappingW
> - MapViewOfFile
>
> Today I found out about winelib. I guess I could give that a go.
> Wine implements those two calls and maps them to the equivalent POSIX
> functions. Yes, building a Winelib program is the right way to go. It
> can use the Win32 functions and normal Linux functions at the same
> time. It does depend on the Wine runtime environment though. Note that
> your game and your winelib application have to run in the same wine prefix.

In theory you could probably use plain mmap in some way, but then you
have to know how Wine maps the Windows object to it's POSIX equivalent.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2

iQIcBAEBAgAGBQJVFBd4AAoJEN0/YqbEcdMwoXYP/2KyY+gGfNeFZbeuwRdnkpUi
XX+a/xtNtpCTN2PFLYd3aqvKu11NCeojxXB1wETcLI0LQ/kjwXL5W/ZuE5X3Eqac
stvxp8j+G/5fu+2ZFxt/Fuqi/HPV/P5aGUgdMTgcGQOIUIoHB8qtlNrfDyJ9eC+k
xgy0fOkxt5EUlU5QvyaGpDcC0LEpCDS9mtnhkaucV6v+VblAXYWARoonIVm/nsRn
1oKFUgfRAJ4taIIrREeN+e2Z9pqFiX2J/tCQxKMdPvHYQcEjRFyUJfjvC44YdImU
bKaMJBPhqDVRWjScRNkY+BCdfbeuFjUfwty8GDGIBQ9/TvLOYoi050/GFU+DIF/h
/R4pZDR+MhWtvupEpsSnfewlKHnntRya00rHiRUoDwGV/R4qf1lGDGI8EXWW9Fky
lyZb4tUrJGYmDxqIQee5gX3u77y5c8l4UdzLBzx1F6omFHMsWVCMist2ikOUQ0hs
K510PIrjIQdqPEwW7rbh4+FymYxKfpN1MCrzSq7R1jo5PX8Txp6PYKp7c/S14nDG
8SON9i6LcbYaYn5U4PuRLRUp2nmbDe0AAaGTDi3s5/gBZFSfmM89p4/1AIHla1Om
eVQEGeWLO8lL4IDmll+xEkZrflSa6pFRC1a4VNIom878nXNVTSE3FirbstZM1Jh/
r49GAKVDxmli0Mu2Fbx+
=snGQ
-----END PGP SIGNATURE-----