From: Daniel Wagner <dwagner@suse.de>
To: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Cc: linux-block@vger.kernel.org, Daniel Wagner <wagi@kernel.org>,
John Meneghini <jmeneghi@redhat.com>
Subject: Re: [PATCH blktests 2/3] common/rc: add _echo() function to trace sysfs attribute writes
Date: Wed, 13 May 2026 16:05:49 +0200 [thread overview]
Message-ID: <a1668df1-a93a-442a-ae95-e015bcbeec17@flourine.local> (raw)
In-Reply-To: <20260513112326.584256-3-shinichiro.kawasaki@wdc.com>
On Wed, May 13, 2026 at 08:23:25PM +0900, Shin'ichiro Kawasaki wrote:
> +# Echo a value to a file. This wrapper is used to trace sysfs attribute writes
> +# when the --cmd-trace option is enabled.
> +_echo() {
> + echo "$1" > "$2"
> +}
Stupid question, can't we override the echo function, something like this:
echo() {
builtin echo "$@"
builtin echo "$@" >> "/tmp/debug_log.txt"
}
next prev parent reply other threads:[~2026-05-13 14:05 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-13 11:23 [PATCH blktests 0/3] introduce command trace feature Shin'ichiro Kawasaki
2026-05-13 11:23 ` [PATCH blktests 1/3] check: add --cmd-trace option Shin'ichiro Kawasaki
2026-05-13 17:08 ` Bart Van Assche
2026-05-13 11:23 ` [PATCH blktests 2/3] common/rc: add _echo() function to trace sysfs attribute writes Shin'ichiro Kawasaki
2026-05-13 14:05 ` Daniel Wagner [this message]
2026-05-13 17:07 ` Bart Van Assche
2026-05-13 17:17 ` Bart Van Assche
2026-05-13 11:23 ` [PATCH blktests 3/3] common/nvme, nvme/rc: use _echo() " Shin'ichiro Kawasaki
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