On 2025-01-09 08:18, Roland Mainz via Cygwin wrote:
On Wed, Jan 8, 2025 at 5:33 PM Roland Mainz <roland.ma...@nrubsig.org> wrote:
Hi!
----
Does Cygwin 3.6 support filesystems which have been forwarded by the
Windows Remote Client (mstsc.exe) ?
I tried to access such a forwarded dir, but $ ls -l # returned this:
---- snip ----
$ bash -c 'cd //TSCLIENT/L && ls -l'
ls: cannot read symbolic link 'newtestmachine_dir2': Invalid argument
ls: cannot read symbolic link 'winserver2019_admindir2': Invalid argument
total 665207504417527
?--xr--r-x 0 Unix_User+2 Unix_Group+1252
8589934592 Jan 1 1970 builds
?--xr--r-x 65535 Unix_User+0 Unix_Group+6539296
8589934592 Jan 1 1970 download
?--xr--r-x 65535 Unix_User+0 Unix_Group+6539296
8589934592 Jan 1 1970 gitbundles
?--xr--r-x 65535 Unix_User+0 Unix_Group+6539296
8589934592 Jan 1 1970 newtestmachine1
l-----xr-x 13 Unix_User+6539088 Unix_Group+6539672
4294967295 Jan 1 1970 newtestmachine_dir2
?-ws-wS--t 65535 Unix_User+0 Unix_Group+6539296
4294967296000 Jan 1 1970 newtestmachine_dir3
?--xr--r-x 65535 Unix_User+0 Unix_Group+6539296
8589934592 Jan 1 1970 rde
?--xr--r-x 65535 Unix_User+0 Unix_Group+6539296
8589934592 Jan 1 1970 rde.zip
?-ws-wS--t 65535 Unix_User+0 Unix_Group+6539296
4294967296000 Mar 17 1970 te_install
l-----x-wx 11 Unix_User+6539088 Unix_Group+6539672
4294967295 Jan 1 1970 winserver2019_admindir2
---- snip ----
Any idea what is going wrong in this case ?
Short update:
On the machine which got the forwarded filesystems I get this:
---- snip ----
$ nfs_ea '\??\UNC\TSCLIENT\T\test1' getnfs3attr
Querying extended attribute 'NfsV3Attributes' on file
'\??\UNC\TSCLIENT\T\test1':
ZwQueryEaFile('"') failed with 0xc0000002
---- snip ----
0xC0000002 == STATUS_NOT_IMPLEMENTED
The Windows NFSv3 and NFSv4.1/NFSv.2 drivers implement support for
"NfsV3Attributes", so it seems filesystem forwarding in RDP does not
support EAs (=extended attributes).
Powershell itself can handle files&&cd etc., it seems only
applications which rely on "NfsV3Attributes" are affected...
... maybe in Cygwin there are places where the return code for
|nfs_fetch_fattr3()| isn't checked ?
Run a Cygwin program under Cygwin strace and redirect the output to prog.strace
which is a time stamped text log of Cygwin internal and Windows "system calls".
--
Take care. Thanks, Brian Inglis Calgary, Alberta, Canada
La perfection est atteinte Perfection is achieved
non pas lorsqu'il n'y a plus rien à ajouter not when there is no more to add
mais lorsqu'il n'y a plus rien à retirer but when there is no more to cut
-- Antoine de Saint-Exupéry
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