yanking without input about yank HOT 6 CLOSED

On Wed, May 04, 2016 at 02:50:51PM -0700, Aurélien Ooms wrote:

Yank does not exit directly when there's nothing in stdin. For example echo | yank waits for user input.

No news is good news, meaning if the input is empty or does not contain
any fields there will be no feedback. This is a common idiom among Unix
commands.

Moreover, in this example, if I press Enter I get

yank: write: Bad address

Which version are you using? Should be fixed in v0.6.3.

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v0.6.2

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On Thu, May 05, 2016 at 02:37:36AM -0700, Aurélien Ooms wrote:

v0.6.2

Could you try v0.6.3 or greater and see if it resolves the error?

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It doesn't crash in v0.6.4. However, I see the lack of (strong) distinction between echo | yank and { sleep 839283; echo 'bla'; } | yank as misleading for the user. The only difference I see in terminator is the blinking cursor.

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On Mon, May 09, 2016 at 06:32:23AM -0700, Aurélien Ooms wrote:

It doesn't crash in v0.6.4.

Glad to hear.

However, I see the lack of (strong) distinction between echo | yank and { sleep 839283; echo 'bla'; } | yank as misleading for the user. The only difference I see in terminator is the blinking cursor.

Your sleep example is tricky to detect since stdin remains open and will
until the echo command has finished. This would require one to use
poll/select with a timeout in order to detect "slow" input. If you want
to bypass yank when stdin is empty you could use wrapper command:

#/bin/sh

tmpfile=$(mktemp -t yank.XXXXXX)
trap "rm "$tmpfile"" EXIT

cat >"$tmpfile" # consume stdin

if [ -s "$tmpfile" ]
then
yank <"$tmpfile"
else
echo "stdin is empty, skipping yank..." 1>&2
exit 1
fi

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Ok

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