• Packaging of openjdk-11-jre, ca-certificates-java (and possibly other)

    From Nils Rennebarth@21:1/5 to All on Mon Oct 25 20:00:01 2021
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    The packages openjdk-11-jre and ca-certificates-java (at least) state in their postinst, that java needs a mounted /proc to run and then fail.

    That is not quite true though: If the lib/jli subdirectory of the jvm base directory (i.e. /usr/lib/jvm/java-11-openjdk-amd64) is added to LD_LIBRARY_PATH, java runs just fine without a mounted /proc.

    Now the openjdk-11-jre just knows where the jvm base directory is, and could simply add a:

    export LD_LIBRARY_PATH

    to run the java binary. Similar for ca-certificates-java that needs to run java in its postinst.

    Background is that I install the openjdk-11-jre in a chrooted environment where no /proc is available. This only produces the final system as a tarball though.

    If you prefer to keep the check for the mounted /proc, to point people in the right direction, could the check be switched off by people like me who know what they are doing? E.g. by

    running_in_chroot() {
    type systemd-detect-virt >/dev/null 2>&1 && systemd-detect-virt --chroot

    and then changing the test to

    if ! running_in_chroot && ! mountpoint -q /proc; then...

    Best regards, Nils Rennebarth

    Dipl. Math Nils Rennebarth
    Senior Berater Entwicklung
    Division Network & Client security
    secunet Security Networks AG

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