#!/bin/sh
#
# Copyright (c) 2022-2023, Jesús Daniel Colmenares Oviedo <DtxdF@disroot.org>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice, this
#   list of conditions and the following disclaimer.
#
# * Redistributions in binary form must reproduce the above copyright notice,
#   this list of conditions and the following disclaimer in the documentation
#   and/or other materials provided with the distribution.
#
# * Neither the name of the copyright holder nor the names of its
#   contributors may be used to endorse or promote products derived from
#   this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

lib_load "${LIBDIR}/colors"
lib_load "${LIBDIR}/check_func"
lib_load "${LIBDIR}/jail"
lib_load "${LIBDIR}/random"

sysrc_desc="Safely edit system rc files within a jail."

sysrc_main()
{
	local entity="$1"; shift
	if lib_check_empty "${entity}"; then
		sysrc_usage
		exit ${EX_USAGE}
	fi

	case "${entity}" in
		all|jail|local) ;;
		*) sysrc_usage; exit ${EX_USAGE} ;;
	esac

	sysrc_${entity} "$@"
}

sysrc_all()
{
	local _o
	local opt_failsafe=0
	local command
	local jail_name
	local errlevel=0

	while getopts ":e" _o; do
		case "${_o}" in
			e)
				opt_failsafe=1
				;;
			*)
				sysrc_usage
				exit ${EX_USAGE}
				;;
		esac
	done
	shift $((OPTIND-1))

	command="$1"; shift
	if [ -z "${command}" ]; then
		sysrc_usage
		exit ${EX_USAGE}
	fi

	case "${command}" in
		jail|local) ;;
		*) lib_err ${EX_DATAERR} "Valid commands: jail, local."
	esac

	"${APPJAIL_PROGRAM}" jail list -HIpt name | while IFS= read -r jail_name
	do
		lib_set_logprefix " [`random_color`${jail_name}${COLOR_DEFAULT}]"
		
		lib_debug "sysrc(8) args: $@"

		(sysrc_${command} "${jail_name}" "$@")

		errlevel=$?

		if [ ${errlevel} -ne 0 ]; then
			if [ ${opt_failsafe} -eq 1 ]; then
				lib_err ${errlevel} "Stop caused by a non-zero value."
			fi
		fi
	done
}

sysrc_jail()
{
	local jail_name="$1"; shift
	if lib_check_empty "${jail_name}"; then
		sysrc_usage
		exit ${EX_USAGE}
	fi

	if ! lib_check_jailname "${jail_name}"; then
		lib_err ${EX_DATAERR} "Invalid jail name \"${jail_name}\""
	fi

	"${APPJAIL_PROGRAM}" cmd jexec "${jail_name}" sysrc "$@"
}

sysrc_local()
{
	local jail_path
	local jail_name

	jail_name="$1"; shift
	if lib_check_empty "${jail_name}"; then
		sysrc_usage
		exit ${EX_USAGE}
	fi

	if ! lib_check_jailname "${jail_name}"; then
		lib_err ${EX_DATAERR} "Invalid jail name \"${jail_name}\""
	fi

	jail_path="${JAILDIR}/${jail_name}/jail"
	if [ ! -d "${jail_path}" ]; then
		lib_err ${EX_NOINPUT} "Cannot find the jail \`${jail_name}\`"
	fi

	sysrc -R "${jail_path}" "$@"
}

sysrc_help()
{
	man 1 appjail-sysrc
}

sysrc_usage()
{
	cat << EOF
usage: sysrc all [-e] <target> [<args> ...]
       sysrc jail <jail> [<args> ...]
       sysrc local <jail> [<args> ...]
EOF
}
