From: Han Boetes <hboetes@gmail.com>
To: Daniel Shahaf <d.s@daniel.shahaf.name>
Cc: zsh-workers@zsh.org
Subject: Re: zsh watch function
Date: Sun, 17 May 2020 01:10:26 +0200 [thread overview]
Message-ID: <CAOzo9e7tnn=HYYUEBoij3Sd1RPPXrxXA2Rb8o8g4jm6YMcZ8cA@mail.gmail.com> (raw)
In-Reply-To: <20200516205926.45d04fc5@tarpaulin.shahaf.local2>
[-- Attachment #1: Type: text/plain, Size: 1320 bytes --]
Hello Daniel,
That's very observant indeed. Here is a new version. I also choose printf
'\033c' in favour of the external command "clear."
Please tell if I missed anything else.
watch () {
local PAD
local IN=2
case $1 in
-n)
IN=$2
shift 2
;;
esac
printf '\033c'
local CM="$*"
local LEFT="$(printf 'Every %.1f: %s' $IN $CM)"
((PAD = COLUMNS - ${#LEFT}))
while :
do
echo -nE "$LEFT"
printf "%${PAD}s\n" "$HOST $(date)"
eval "$CM"
sleep $IN
printf '\033c'
done
}
On Sat, May 16, 2020 at 10:59 PM Daniel Shahaf <d.s@daniel.shahaf.name>
wrote:
> Han Boetes wrote on Sat, 16 May 2020 16:31 +0200:
> > And then I saw the padding light, here an improved version:
> >
> > watch () {
> > IN=2
>
> The code isn't WARN_CREATE_GLOBAL-clean.
>
> > CM="$*"
> > LEFT="$(printf 'Every %.1f: %s' $IN $CM)"
> ⋮
> > printf "$LEFT%${PAD}s\n" "$HN $(date)"
>
> $LEFT may contain unescaped percent signs from the input.
>
> > eval "$CM"
> > sleep $IN
> > clear
> > done
> > }
>
> For context to others, note that watch(1) on FreeBSD does something
> entirely different to what watch(1) does on Linux.
>
next prev parent reply other threads:[~2020-05-16 23:11 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-16 12:20 Han Boetes
2020-05-16 14:31 ` Han Boetes
2020-05-16 20:59 ` Daniel Shahaf
2020-05-16 23:10 ` Han Boetes [this message]
2020-05-16 14:36 ` Roman Perepelitsa
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