On 2024-11-01 06:10, Jan Černohorský wrote:

> when the `-q` option is 
> detected (grep.c:2697), the `exit_failure` variable is set to 0. This 
> causes any error, when not specially handled, to exit with 0, even 
> before any match is found.

Yes, that's a mistake. I can't reproduce your bug but I can see other 
consequences of the mistake. Fixed in the attached patch (with a test 
case that's unlike your problem); please give it a try.

That being said, the lower levels of your OS appear to be buggy, as 
'close' should not fail with EACCES. I wouldn't be surprised if other 
software breaks because of this issue. So I suggest also reporting a bug 
to whoever maintains the NFS client code that you're using.

I'm boldly closing this bug report; we can reopen it if the patch 
doesn't work for you.