Allow lpass show -c to clear the clipboard after a given time about lastpass-cli HOT 9 OPEN

@tomprince: hmm, export LPASS_CLIPBOARD_COMMAND="xclip -l 1" does not seem to copy anything to the clipboard.

export LPASS_CLIPBOARD_COMMAND="xclip -selection clipboard -in -l 1" does the job.

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For macOS there seems to be no solution... this is the best workaround I've come up with that will clear the clipboard after X seconds, and you still get bash/zsh autocompletion:

$ cat ~/bin/pbclear
#!/bin/bash
if [ -n "$1" ]; then
  sleep $1
fi
echo -n '' | pbcopy
$ alias lps
lps='~/bin/pbclear 4 &; lpass show -c --password '

I think clearing clipboard after X seconds of population is a core feature of a password manager (like 1Password has this built in). But the way lastpass-cli has implemented populating clipboard (basically execute all clipboard managers and see which one that succeeds) makes this hard to implement in lastpass-cli.

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@cspeterson @bcopeland I can see why people want that, but looks there are workarounds to get this functionality without changing the core program. It's good to keep lastpass-cli to minimum. Let's just close this issue.

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I would like this too. Sadly, I do not have any knowledge of C but I will take a look at the code.

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+1 I would love to see this.

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This would be a good thing to support, as a workaround, you can now set LPASS_CLIPBOARD_COMMAND to something that does what you want. (I have it set to xclip -l)

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I investigated whether a consistent, reasonable, secure default solution was possible across the four different supported clipboard tools so I could just submit a pull request, but: nope!

The tools:
xclip (Linux), xsel (Linux), pbcopy (MacOS), putclip (cygwin)

• xclip: as pointed out above, can be told to limit the number of subsequent paste requests, but cannot set a timeout/expiration
• xsel: can specify a timeout in ms, but not a limit on paste requests
• pbcopy: offers no such functionality
• putclip: what is this even? I'm unable to find a manpage or anything

Anyway, the bottom line is that the different supported clipboard interfaces even on the same platform do not support consistent behaviour. I think the environment variables remain the best solution. :(

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@kozmic did you see my comment above? xclip is available on brew.

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@hazcod I did see it, but xclip uses another buffer for data (correct me if I'm wrong), so I can't paste my password into applications with Command+V.

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