File rpm-helper of Package libpulp.25800

#!/bin/bash
# SPDX-License-Identifier: GPL-2.0-or-later

USAGE="$0 <install|remove> <package> <version> <num_packages>"

if test "$1" = "-h" -o "$1" = "--help"; then
	echo "$USAGE"
	exit 0
fi
if test "$#" -lt 2; then
	echo "$USAGE" >&2
	exit 1
fi

# ulp trigger have problems with bash expanding its arguments. Disable that
# and let it expand the wildcard by itself.
shopt -s nullglob

check_livepatching_env()
{
	[ -z "$PACKAGE" ] && return 0

	COMPONENT=${PACKAGE%-livepatches}
	COMPONENT=${COMPONENT^^}
	COMPONENT=${COMPONENT/-/_}
	CONF_VAR_NAME="LIVEPATCH_$COMPONENT"
	eval "$CONF_VAR_NAME"=auto

	# Check if a sysconfig for livepatching exists. If yes, include the file.
	if test -f "/etc/sysconfig/livepatching"; then
		. /etc/sysconfig/livepatching || :
	fi

	# We want to preserve the immutability of the system in the
	# transactional server role. To that end, we define the "auto" patch
	# deployment mode that skips the patch loading in transactional
	# updates.
	DO_PATCHING=0
	[ "$TRANSACTIONAL_UPDATE" != "true" -a "${!CONF_VAR_NAME}" == "auto" ] && DO_PATCHING=1
	[ "${!CONF_VAR_NAME}" == "always" ] && DO_PATCHING=1

	[ "$DO_PATCHING" -eq 0 ] && return 1
	return 0
}

do_install()
{
	if test -e /.buildenv; then
		echo "Skipping userspace live patches in buildroot"
		return 0
	fi

	check_livepatching_env || return 0

	# TODO: review if we need to guard against multiple patch application
	echo -n '[ulp] '; ulp trigger --revert-all="$TARGET_LIB" "/usr/lib64/$PACKAGE/*.so"
}

do_remove()
{
	: # reserved for future use
}

if test $# -ne 5; then
	echo 'WARNING: Unexpected number of parameters. Are the live patch RPM scripts compatible with this rpm-helper?' >&2
fi

cmd=$1
PACKAGE=$2
VER=$3
TARGET_LIB=$4
NUM_PACKAGES=${5-0}
case "$cmd" in
install|remove)
	do_$cmd
	exit
	;;
*)
	echo "$USAGE" >&2
	exit 1
esac