#!/bin/sh

#set -vx

LCFILE=/etc/pki/ca-trust/ca-legacy.conf
LLINK=/etc/pki/ca-trust/source/ca-bundle.legacy.crt
LENABLE=/usr/share/pki/ca-trust-legacy/ca-bundle.legacy.enable.crt
LDISABLE=/usr/share/pki/ca-trust-legacy/ca-bundle.legacy.disable.crt

do_grep()
{
    grep -i "^legacy *= *enable *$" $LCFILE >/dev/null 2>&1
}

do_check()
{
    do_grep
    if [ $? -eq 0 ]; then
        echo "Legacy CAs are set to ENABLED in file $LCFILE (affects install/upgrade)"
        LEXPECT=$LENABLE
    else
        echo "Legacy CAs are set to DISABLED in file $LCFILE (affects install/upgrade)"
        LEXPECT=$LDISABLE
    fi
    echo "Status of symbolic link $LLINK:"
    readlink -v $LLINK
}

do_install()
{
    do_grep
    if [ $? -eq 0 ]; then
        # expression was found, legacy is enabled
        ln -sf $LENABLE $LLINK
    else
        # not found, legacy is disabled
        ln -sf $LDISABLE $LLINK
    fi
}

do_enable()
{
    sed -i 's/^legacy *=.*$/legacy=enable/' $LCFILE
    do_install
    /usr/bin/update-ca-trust
}

do_disable()
{
    sed -i 's/^legacy *=.*$/legacy=disable/' $LCFILE
    do_install
    /usr/bin/update-ca-trust
}

do_help()
{
    echo "usage: $0 [check | enable | disable | install]"
}

if [[ $# -eq 0 ]]; then
  # no parameters
  do_help
  exit $?
fi

if [[ "$1" = "install" ]]; then
  do_install
  exit $?
fi

if [[ "$1" = "enable" ]]; then
  do_enable
  exit $?
fi
if [[ "$1" = "disable" ]]; then
  do_disable
  exit $?
fi

if [[ "$1" = "check" ]]; then
  do_check
  exit $?
fi