On 2023-08-26 11:40, Martin Wege via Cygwin wrote:
On Sat, Aug 26, 2023 at 4:16 PM Corinna Vinschen via Cygwin
<cygwin@cygwin.com> wrote:

On Aug 26 13:26, Cedric Blancher via Cygwin wrote:
On Fri, 25 Aug 2023 at 14:26, Corinna Vinschen via Cygwin
<cygwin@cygwin.com> wrote:

On Aug 25 14:18, Corinna Vinschen via Cygwin wrote:
On Aug 23 01:05, Roland Mainz via Cygwin wrote:
2. Check whether the filesystem for the fifos path is NFS
(cgywin.dll's |fs.fs_is_nfs()|), and then just refuse |mkfifo()| with
|ENOSYS| (not implemented)

I like the idea.

EPERM, btw.  See https://man7.org/linux/man-pages/man2/mknod.2.html


I am vehemently opposed to that idea. That will IMHO not only be the
wrong solution, it will break actual things like autoconf&friends on
NFS - they create fifos for testing, but do not use them. If you just
make this return EPERM, then you break stuff we have to rely on.

https://cygwin.com/acronyms/#STC, please.#

Real world failure for Cygwin on NFS:

wget 
'http://deb.debian.org/debian/pool/main/k/ksh93u+m/ksh93u+m_1.0.4.orig.tar.gz
cd ksh-1.0.4
$PWD/bin/package make

This fails with Cygwin 3.4.8-1:

cat buildlog.log
package: update
/cygdrive/z/arbeitdfn/windows_ksh/build_nfsv3/ksh-1.0.4/bin/execrate
package: initialize the
/cygdrive/z/arbeitdfn/windows_ksh/build_nfsv3/ksh-1.0.4/arch/cygwin.i386-64
view
package: update
/cygdrive/z/arbeitdfn/windows_ksh/build_nfsv3/ksh-1.0.4/arch/cygwin.i386-64/lib/probe/C/make/probe
package: update
/cygdrive/z/arbeitdfn/windows_ksh/build_nfsv3/ksh-1.0.4/arch/cygwin.i386-64/bin/mamake
package: make with mamake
package: make output captured in
/cygdrive/z/arbeitdfn/windows_ksh/build_nfsv3/ksh-1.0.4/arch/cygwin.i386-64/lib/package/gen/make.out
mkfifo: cannot set permissions of
'/cygdrive/z/arbeitdfn/windows_ksh/build_nfsv3/ksh-1.0.4/arch/cygwin.i386-64/lib/package/gen/make.out.fifo':
No such file or directory
package: make done at Fri Aug 26 19:24:26 CEST 2023 in
/cygdrive/z/arbeitdfn/windows_ksh/build_nfsv3/ksh-1.0.4/arch/cygwin.i386-64

If you need more examples just let me now, we have MUCH more of that...

No - the DLL developers need fewer examples, just *ONE* Simple Test Case, boiled down to the essentials, with notes on preconditions, if you can not recreate the required conditions in a program or script.

Alternatively, Cygwin strace output with notes from a failing program, or a gdb script and log of the failing code with enough calling context and notes.

Please read the problem reporting guidelines linked at the bottom of all posts and follow them.

--
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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