From 1d2a855992bc231dd547fc3fd1035c1999bb1913 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 24 Jun 2017 15:56:12 +0200 Subject: Adding new container top command. Signed-off-by: Daniel Baumann --- lib/container/top | 113 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 113 insertions(+) create mode 100755 lib/container/top (limited to 'lib') diff --git a/lib/container/top b/lib/container/top new file mode 100755 index 0000000..0ff1834 --- /dev/null +++ b/lib/container/top @@ -0,0 +1,113 @@ +#!/bin/sh + +# container-tools - Manage systemd-nspawn containers +# Copyright (C) 2014-2017 Daniel Baumann +# +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see . + +set -e + +Parameters () +{ + GETOPT_LONGOPTIONS="delay:," + GETOPT_OPTIONS="d:," + + PARAMETERS="$(getopt --longoptions ${GETOPT_LONGOPTIONS} --name=${COMMAND} --options ${GETOPT_OPTIONS} --shell sh -- ${@})" + + if [ "${?}" != "0" ] + then + echo "'${COMMAND}': getopt exit" >&2 + exit 1 + fi + + eval set -- "${PARAMETERS}" + + while true + do + case "${1}" in + -d|--delay) + DELAY="${2}" + shift 2 + ;; + + --) + shift 1 + break + ;; + + *) + echo "'${COMMAND}': getopt error" >&2 + exit 1 + ;; + esac + done +} + +Usage () +{ + echo "Usage: container ${COMMAND} [-d|--delay DELAY]" >&2 + exit 1 +} + +Parameters "${@}" + +DELAY="${DELAY:-1}" +HOST="$(hostname -f)" + +# Pre hooks +for FILE in "${HOOKS}/pre-${COMMAND}".* "${HOOKS}/${NAME}.pre-${COMMAND}" +do + if [ -x "${FILE}" ] + then + "${FILE}" + fi +done + +# Run +Top () +{ + HOME="$(tput cup 0 0)" + ED="$(tput ed)" + EL="$(tput el)" + + printf '%s%s' "${HOME}" "${ED}" + + while true + do + ROWS="$(tput lines)" + COLS="$(tput cols)" + CMD="${@}" + + ${SHELL:=sh} -c "${CMD}" | head -n ${ROWS} | while IFS= read LINE + do + printf '%-*.*s%s\n' ${COLS} ${COLS} "${LINE}" "${EL}" + done + + printf '%s%s' "${ED}" "${HOME}" + sleep ${DELAY} + done +} + +trap 'clear' EXIT HUP INT QUIT TERM + +Top "container list && printf '%-59s %-19s\n' \" Host: ${HOST}\" \"\$(date +%Y-%m-%d\ %H:%M:%S)\"" + +# Post hooks +for FILE in "${HOOKS}/post-${COMMAND}".* "${HOOKS}/${NAME}.post-${COMMAND}" +do + if [ -x "${FILE}" ] + then + "${FILE}" + fi +done -- cgit v1.2.3