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appjail.sh
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appjail.sh
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#!/bin/sh
#
# Copyright (c) 2022-2023, Jesús Daniel Colmenares Oviedo <[email protected]>
# 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
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
APPJAIL_PROGRAM="%%PREFIX%%/bin/appjail"
CONFIG="%%PREFIX%%/share/appjail/files/config.conf"
main()
{
set -T
. "${CONFIG}"
if [ `id -u` -ne 0 ]; then
exec "${SCRIPTSDIR}/ajuser.sh" "$@"
fi
. "${LIBDIR}/load"
# For convenience, these will be loaded.
lib_load "${LIBDIR}/sysexits"
lib_load "${LIBDIR}/atexit"
lib_load "${LIBDIR}/log"
lib_load "${LIBDIR}/check_func"
lib_load "${LIBDIR}/zfs"
# Create the data directory for functions that use it at startup.
if ! lib_zfs_mkroot; then
lib_err ${EX_IOERR} "Error creating ${DATADIR}"
fi
lib_init_logtime
local cmd=$1; shift
if [ -z "${cmd}" ]; then
usage
fi
if [ ! -x "${COMMANDS}/${cmd}" ]; then
lib_err ${EX_NOINPUT} "Command \"${cmd}\" does not exist."
fi
lib_load "${COMMANDS}/${cmd}"
# logging
if [ "${ENABLE_LOGGING_OUTPUT}" != "0" -a -z "${AJ_LOG_SESSION_ID}" ]; then
lib_debug "Running: ${SESSION_ID_NAME}"
local errlevel
local session_id
session_id=`sh -c "${SESSION_ID_NAME}"`
errlevel=$?
if [ ${errlevel} -ne 0 ]; then
lib_err ${errlevel} "{SESSION_ID_NAME} exits with a non-zero exit status."
fi
if lib_check_ispath "${session_id}"; then
lib_err ${EX_DATAERR} -- "${session_id}: invalid log name."
fi
lib_zfs_mklogdir "commands" "${cmd}" "output"
exec env \
AJ_LOG_SESSION_ID="${session_id}" \
script -a -t "${SCRIPT_TIME}" -- \
"${LOGDIR}/commands/${cmd}/output/${session_id}" \
"${APPJAIL_PROGRAM}" \
"${cmd}" \
"$@"
exit 0
fi
if ! lib_check_func "${cmd}_main"; then
lib_err ${EX_SOFTWARE} "${cmd}_main function does not exist in the ${cmd} command."
fi
lib_atexit_init
if [ -z "${APPJAIL_KILL_TREE}" ]; then
# To avoid using kill_tree.sh more times than necessary.
export APPJAIL_KILL_TREE=1
local kill_tree_cmd
kill_tree_cmd=`lib_escape_string "${SCRIPTSDIR}/kill_tree.sh"`
local config_file
config_file=`lib_escape_string "${CONFIG}"`
lib_atexit_add "\"${kill_tree_cmd}\" -c \"${config_file}\" -p $$ > /dev/null 2>&1"
fi
${cmd}_main "$@"
}
usage()
{
echo "usage: appjail <command> [<args> ...]" >&2
exit 64 # EX_USAGE
}
main "$@"