Broke my libreadline.so [SOLVED]

22 November 2021, 21:29:27

I had a problem with R, that It couldn't reach libreadline.so.6.
So, I followed https://stackoverflow.com/questions/24962201/error-while-loading-shared-libraries-libreadline-so-5
and I screwed the libreadline command.

The state of my machine is such:

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cd /usr/share

Then,

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ls | grep "libreadline"

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libreadline.so
libreadline.so.5
libreadline.so.8

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readlink libreadline.so

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libreadline.so.8

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readlink libreadline.so.5

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libreadline.so.8.1

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readlink libreadline.so.8

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libreadline.so.5

I can't update my system anymore.

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pacman -Syu

I get these errors:

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(9/9) checking package integrity                   [----------------------] 100%
error: GPGME error: Invalid crypto engine

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error: libcap: missing required signature

Or, even,

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yay -Sy readline6 readline7

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 :: Importing keys with gpg...
gpg: error while loading shared libraries: libreadline.so.8: cannot open shared object file: No such file or directory
 -> problem importing keys

Is there a way to fix this?

Re: Broke my libreadline.so

Reply #1 – 22 November 2021, 21:54:42

So if you did this:

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ln -sf libreadline.so.8 -T libreadline.so.5

you replaced libreadline.so.8 with a symlink to libreadline.so.5 ?
Well now you want it back again (mv'ing the original file first to libreadline.so.8.bak would be a sensible precaution if you want to try that again) so never mind, not a problem if the readline package is in your cache, otherwise get it from a mirror repo:

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$ cd /var/cache/pacman/pkg
$ sudo pacman -U readline-8.1.001-1-x86_64.pkg.tar.zst

Or if that doesn't work pull the file from the package manually, copy the package to some empty dir then untar it:

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$ tar -xvf readline-8.1.001-1-x86_64.pkg.tar.zst