#38 Nothing copied to clipboard

[Greg Parker]

Installed kpcli from AUR. Everything is working except copying a password to the clipboard. I installed both the additional Perl libraries for the clipboard. When I use xp is says everything has worked but the password is not on the clipboard.

KeePass CLI (kpcli) v3.2 is ready for operation.
Type 'help' for a description of available commands.
Type 'help ' for details on individual commands.

kpcli:/> vers
VERSIONS

• kpcli: 3.2
• Perl: v5.28.1
• File::KeePass: 2.03
• Term::ShellUI: 0.92
• Term::ReadKey: 2.37
• Term::ReadLine: 1.17
• Capture::Tiny: 0.48
• Clipboard: 0.13
• Term::ReadLine::Gnu: 1.35
• Math::Random::ISAAC: not installed (optional)
• Sub::Install: not installed (optional)

ReadLine being used: Term::ReadLine::Gnu
Operating system: linux ("Manjaro Linux")

[Lester Hightower]

The perl module Clipboard requires the xclip command. Please verify that you have that installed. I don't use Arch Linux often, but on Debian and Ubuntu it is packaged thusly:

hightowe@zion:~$ which xclip
/usr/bin/xclip
hightowe@zion:~$ dpkg -S /usr/bin/xclip
xclip: /usr/bin/xclip
hightowe@zion:~$ apt-cache show xclip
Package: xclip
Priority: optional
Section: universe/x11
Installed-Size: 71
Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
Original-Maintainer: Alessandro Ghedini <ghedo@debian.org>
Architecture: amd64
Version: 0.12+svn84-4
Depends: libc6 (>= 2.14), libx11-6, libxmu6
Filename: pool/universe/x/xclip/xclip_0.12+svn84-4_amd64.deb
Size: 16992
MD5sum: d28fad44fae30de33e4092cc158008bd
SHA1: 6e67fae9bae3f77809b8f116415805844ef41bc1
SHA256: 09aded46dca0742e25d0be45247895a82d1ba574fb561e90dc5d0d2afa6c0acb
Description-en: command line interface to X selections
 xclip is a command line utility that is designed to run on any system with an
 X11 implementation. It provides an interface to X selections ("the clipboard")
 from the command line. It can read data from standard in or a file and place
 it in an X selection for pasting into other X applications. xclip can also
 print an X selection to standard out, which can then be redirected to a file
 or another program.
Description-md5: 7de32c567d0e0ae3e774a47b7dbea945
Homepage: http://xclip.sourceforge.net
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Origin: Ubuntu

Hope this helps. Please reply to the ticket to let me know.

[Greg Parker]

Looks like I have xclip.

$ which xclip
/usr/bin/xclip
[greg@greg-pc ~]$ pacman -Q --info xclip
Name : xclip
Version : 0.13-2
Description : Command line interface to the X11 clipboard
Architecture : x86_64
URL : https://github.com/astrand/xclip
Licenses : GPL
Groups : None
Provides : None
Depends On : libxmu
Optional Deps : None
Required By : perl-clipboard
Optional For : None
Conflicts With : None
Replaces : None
Installed Size : 59.00 KiB
Packager : Gaetan Bisson bisson@archlinux.org
Build Date : Wed 03 Oct 2018 08:13:22 PM ADT
Install Date : Sun 13 Jan 2019 02:37:11 PM AST
Install Reason : Installed as a dependency for another package
Install Script : No
Validated By : Signature

[Lester Hightower]

Does xclip from the command line work for you?

$ echo "test copy" | xclip -in

...and then paste to test.

[Greg Parker]

Not quite like you have it, but this does:

echo "test copy" | xclip -in -selection clipboard

[Greg Parker]

Just hacking around. If I change Clipboard->copy to Clipboard::Xclip->copy_to_selection then everything works

lines 1788-1791

if (defined($to_copy)) {
Clipboard::Xclip->copy_to_selection("clipboard", $to_copy);
print "Copied $cp_map->{$xNcmd} for \"$ent->{title}\" to the clipboard.\n";
}

[Lester Hightower]

Looking at the Clipboard code here: https://metacpan.org/source/KING/Clipboard-0.13/lib/Clipboard/Xclip.pm

I see that the default "-selection" option is "primary", taken from this list, this way (item 0):

sub all_selections { qw(primary buffer clipboard secondary) }
sub favorite_selection { my $self = shift; ($self->all_selections)[0] }

...and, with your code change, you overrode that to "clipboard" instead. I am not 100% sure what that is doing in your personal X11 environment, but I suspect this nit to be local to it. You'll need to dig into the various X11 clipboards to try to understand the details. Here is a start:

$ man xclip | egrep -A2 -- '^ +-select'
       -selection
              specify which X selection to use, options are "primary"
              to use XA_PRIMARY (default), "secondary" for XA_SECONDARY
              or "clipboard" for XA_CLIPBOARD

https://tronche.com/gui/x/icccm/sec-2.html#s-2.6.1

[dhobach]

Setting both primary AND clipboard at the same time would be right, see https://specifications.freedesktop.org/clipboards-spec/clipboards-latest.txt :

• explicit cut/copy commands (i.e. menu items, toolbar buttons)
  should always set CLIPBOARD to the currently-selected data (i.e.
  conceptually copy PRIMARY to CLIPBOARD)

• explicit cut/copy commands should always set both CLIPBOARD and
  PRIMARY, even when copying doesn't involve a selection (e.g. a
  "copy url" -option which explicitly copies an url without the
  url being selected first)

[Lester Hightower]

Have you looked at the --xclipsel command line option?

$ kpcli-DEVELOPMENT.pl  --xclipsel=help
--xclipsel must be one of: all, [primary], buffer, clipboard, secondary

Is that choice what you are referring to?

[dhobach]

Thanks, looks like it was implemented in a version newer than mine (3.1).

I'll upgrade then, much appreciated!