GNU bug report logs - #75590
ports.test: "SEEK_DATA while in hole" fails on some hosts

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Message #14 received at 75590 <at> debbugs.gnu.org (full text, mbox):

From: Ludovic Courtès <ludo <at> gnu.org>
To: Rob Browning <rlb <at> defaultvalue.org>
Cc: Mikael Djurfeldt <mikael <at> djurfeldt.com>, 75590 <at> debbugs.gnu.org
Subject: Re: bug#75590: ports.test: "SEEK_DATA while in hole" fails on some
 hosts
Date: Fri, 28 Feb 2025 21:20:01 +0100

Hi Rob,

Rob Browning <rlb <at> defaultvalue.org> skribis:

> +(define (skip-unless-fs-handles-holes-as-expected)
> +  ;; For now only allow filesystems that should have the seek hole/data
> +  ;; semantics the tests expect.  Filesystems vary both in how they
> +  ;; handle sparseness in general (e.g. granularity), how they handle
> +  ;; SEEK_DATA and SEEK_HOLE (see lseek(2) for some related info), and
> +  ;; even how quickly they reflect changes.  du's output, for example,
> +  ;; may not immediately reflect sparseness changes (previously observed
> +  ;; on btrfs and zfs).
> +  (let* ((p (open-input-pipe "debian/bin/path-fs ."))
> +         (fs (read-all p)))

What does ‘path-fs’ do?  How can we adapt it for use in the test suite?

Thanks for investigating!

Ludo’.

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