Subject: Re: coreutils-8.32 test failure on i586-gnu

From: Ludovic Courtès <[email-masked]>
Date: Sat, 26 Nov 2022 16:35:29 +0100

Hi,

Samuel Thibault <[email-masked]> skribis:

> It seems that replying on the web interface didn't work, so replying
> again here by mail.

Weird.

> Ludovic Courtès, le mer. 26 oct. 2022 19:20:07 +0200, a ecrit:
>> ludo@childhurd ~$ mkfifo fifo
>> ludo@childhurd ~$ ls -l fifo
>> prw-r--r-- 1 ludo users 0 Oct 21 07:08 fifo
>> ludo@childhurd ~$ df ./fifo
>> df: Warning: cannot read table of mounted file systems: No such file or directory
>> ^C
>
> Using coreutils 9.1, I am not getting the issue any more:
>
> € mkfifo foo
> € ls -l foo
> prw-r--r-- 1 samy samy 0 Nov 26 11:47 foo
> € df ./foo
> Filesystem      Size  Used Avail Use% Mounted on
> -                20G   18G  1.8G  91% /

Oh nice.  This may be a side effect of Coreutils commit
a3c04f8da14f0fe2a0561bf5562032b8ce5dafa9 (which made it in 9.0), which
opens the file with O_NONBLOCK.

>> Maybe /hurd/fifo needs to implement ‘trivfs_check_open_hook’ to avoid
>> actually opening?
>
> I don't think it will change the behavior? trivfs_S_dir_lookup will call
> trivfs_open after trivfs_check_open_hook anyway.

Indeed, that was misguided, sorry for the confusion.

Ludo’.