567 lines
18 KiB
Bash
Executable file
567 lines
18 KiB
Bash
Executable file
#!/bin/sh
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#
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# bkctld is a shell script to create and manage a backup server which will
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# handle the backup of many servers (clients).
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#
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# Author: Victor Laborie <vlaborie@evolix.fr>
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# Contributor: Benoît Série <bserie@evolix.fr>, Gregory Colpart <reg@evolix.fr>, Romain Dessort <rdessort@evolix.fr>, Tristan Pilat <tpilat@evolix.fr>
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# Licence: AGPLv3
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#
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set -u
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usage(){
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cat <<EOF
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Usage: $0 <subcommand> [options]
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Subcommands:
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init <jailname> Init jail <jailname>
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update <jailname>|all Update jail <jailname> or all
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remove <jailname>|all Remove jail <jailname> or all
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start <jailname>|all Start jail <jailname> or all
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stop <jailname>|all Stop jail <jailname> or all
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reload <jailname>|all Reload jail <jailname> or all
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restart <jailname>|all Restart jail <jailname> or all
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sync <jailname>|all Sync jail <jailname> or all to another node
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status [<jailname>] Print status of <jailname> (default all jail)
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key <jailname> [<keyfile>] Set or get ssh pubic key of <jailname>
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port <jailname> [<port>|auto] Set or get ssh port of <jailname>
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ip <jailname> [<ip>|all] Set or get allowed(s) ip(s) of <jailname>
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inc Make incremental inc of all jails
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rm Remove old incremtal inc of all jails
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EOF
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}
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## logging functions
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debug() {
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msg="${1:-$(cat /dev/stdin)}"
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if [ "${LOGLEVEL}" -ge 7 ]; then
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echo "${msg}"
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logger -t bkctld -p daemon.debug "${msg}"
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fi
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}
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info() {
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msg="${1:-$(cat /dev/stdin)}"
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if [ "${LOGLEVEL}" -ge 6 ]; then
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tty -s && echo "${msg}"
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logger -t bkctld -p daemon.info "${msg}"
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fi
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}
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notice() {
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msg="${1:-$(cat /dev/stdin)}"
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tty -s && echo "${msg}"
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[ "${LOGLEVEL}" -ge 5 ] && logger -t bkctld -p daemon.notice "${msg}"
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}
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warning() {
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msg="${1:-$(cat /dev/stdin)}"
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tty -s && echo "WARNING : ${msg}" >&2
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if [ "${LOGLEVEL}" -ge 4 ]; then
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tty -s || echo "WARNING : ${msg}" >&2
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logger -t bkctld -p daemon.warning "${msg}"
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fi
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}
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error() {
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msg="${1:-$(cat /dev/stdin)}"
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tty -s && echo "ERROR : ${msg}" >&2
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if [ "${LOGLEVEL}" -ge 5 ]; then
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tty -s || echo "ERROR : ${msg}" >&2
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logger -t bkctld -p daemon.error "${msg}"
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fi
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exit 1
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}
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## check functions
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check_jail() {
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jail="${1}"
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[ -d "${JAILDIR}/${jail}" ] && return 0
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return 1
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}
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check_jail_on() {
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jail="${1}"
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return=1
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if [ -f "${JAILDIR}/${jail}/${SSHD_PID}" ]; then
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pid=$(cat "${JAILDIR}/${jail}/${SSHD_PID}")
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ps -p "${pid}" > /dev/null && return=0
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fi
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if [ "${return}" -eq 1 ]; then
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rm -f "${JAILDIR}/${jail}/${SSHD_PID}"
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grep -q "${JAILDIR}/${jail}/proc" /proc/mounts && umount --lazy "${JAILDIR}/${jail}/proc/"
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grep -q "${JAILDIR}/${jail}/dev" /proc/mounts && umount --lazy --recursive "${JAILDIR}/${jail}/dev"
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fi
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return "${return}"
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}
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## get functions : get info on jail
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get_port() {
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jail="${1}"
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port=$(grep -E "Port [0-9]+" "${JAILDIR}/${jail}/${SSHD_CONFIG}"|grep -oE "[0-9]+")
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echo "${port}"
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}
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get_key() {
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jail="${1}"
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if [ -f "${JAILDIR}/${jail}/${AUTHORIZED_KEYS}" ]; then
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cat "${JAILDIR}/${jail}/${AUTHORIZED_KEYS}"
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fi
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}
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get_ip() {
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jail="${1}"
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grep -E "^AllowUsers" "${JAILDIR}/$jail/${SSHD_CONFIG}"|grep -Eo "root@[^ ]+"| while read allow; do
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echo "${allow}"|cut -d'@' -f2
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done
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}
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get_inc() {
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jail="${1}"
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inc="0"
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if [ -f "${CONFDIR}/${jail}" ]; then
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day=$(grep -c "day" "${CONFDIR}/${jail}")
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month=$(grep -c "month" "${CONFDIR}/${jail}")
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inc="${day}/${month}"
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fi
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echo "${inc}"
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}
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## set functions : set info on jail
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set_port() {
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jail="${1}"
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port="${2}"
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if [ "${port}" = "auto" ]; then
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port=$(grep -h Port "${JAILDIR}"/*/"${SSHD_CONFIG}" 2>/dev/null | grep -Eo "[0-9]+" | sort -n | tail -1)
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port=$((port+1))
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[ "${port}" -le 1 ] && port=2222
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fi
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sed -i "s/^Port .*/Port ${port}/" "${JAILDIR}/$jail/${SSHD_CONFIG}"
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set_firewall "${jail}"
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}
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set_key() {
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jail="${1}"
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keyfile="${2}"
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[ -e "${keyfile}" ] || error "Keyfile ${keyfile} dosen't exist !"
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cat "${keyfile}" > "${JAILDIR}/${jail}/${AUTHORIZED_KEYS}"
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chmod 600 "${JAILDIR}/${jail}/${AUTHORIZED_KEYS}"
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}
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set_ip() {
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jail="${1}"
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ip="${2}"
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if [ "${ip}" = "all" ] || [ "${ip}" = "0.0.0.0/0" ]; then
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ips="0.0.0.0/0"
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else
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ips=$(get_ip "${jail}")
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ips=$(echo "${ips}" "${ip}"|xargs -n1|grep -v "0.0.0.0/0"|sort|uniq)
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fi
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allow="AllowUsers"
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for ip in $ips; do
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allow="${allow} root@${ip}"
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done
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sed -i "s~^AllowUsers .*~${allow}~" "${JAILDIR}/$jail/${SSHD_CONFIG}"
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set_firewall "${jail}"
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}
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set_firewall() {
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jail="${1}"
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if [ -n "${FIREWALL_RULES}" ]; then
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if [ -f "${FIREWALL_RULES}" ]; then
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sed -i "/#${jail}$/d" "${FIREWALL_RULES}"
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fi
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if ( check_jail "${jail}" ); then
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port=$(get_port "${jail}")
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for ip in $(get_ip "${jail}"); do
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echo "/sbin/iptables -A INPUT -p tcp --sport 1024: --dport ${port} -s ${ip} -j ACCEPT #${jail}" >> "${FIREWALL_RULES}"
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done
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if [ -f /etc/init.d/minifirewall ]; then
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/etc/init.d/minifirewall restart >/dev/null
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fi
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fi
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fi
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}
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## mk_jail function : create or update a jail
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mk_jail() {
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jail="${1}"
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passwd="${TPLDIR}/passwd"
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shadow="${TPLDIR}/shadow"
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group="${TPLDIR}/group"
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sshrc="${TPLDIR}/sshrc"
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[ -f "${LOCALTPLDIR}/passwd" ] && passwd="${LOCALTPLDIR}/passwd"
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[ -f "${LOCALTPLDIR}/shadow" ] && shadow="${LOCALTPLDIR}/shadow"
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[ -f "${LOCALTPLDIR}/group" ] && group="${LOCALTPLDIR}/group"
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[ -f "${LOCALTPLDIR}/sshrc" ] && group="${LOCALTPLDIR}/sshrc"
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umask 077
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info "1 - Creating the chroot"
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cd "${JAILDIR}/${jail}"
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rm -rf bin lib lib64 run usr var/run etc/ssh/*key
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mkdir -p dev proc
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mkdir -p usr/bin usr/sbin usr/lib usr/lib/x86_64-linux-gnu usr/lib/openssh usr/lib64
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mkdir -p etc/ssh var/log run/sshd
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mkdir -p root/.ssh var/backup -m 0700
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ln -s usr/bin bin
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ln -s usr/lib lib
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ln -s usr/lib64 lib64
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ln -st var ../run
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touch var/log/lastlog var/log/wtmp run/utmp
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info "2 - Copying essential files"
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[ -f /etc/ssh/ssh_host_rsa_key ] && cp /etc/ssh/ssh_host_rsa_key etc/ssh
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[ -f /etc/ssh/ssh_host_ecdsa_key ] && cp /etc/ssh/ssh_host_ecdsa_key etc/ssh
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[ -f /etc/ssh/ssh_host_ed25519_key ] && cp /etc/ssh/ssh_host_ed25519_key etc/ssh
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cp "${passwd}" etc
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cp "${shadow}" etc
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cp "${group}" etc
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cp "${sshrc}" etc/ssh
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info "3 - Copying binaries"
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cp -f /lib/ld-linux.so.2 lib 2>/dev/null || cp -f /lib64/ld-linux-x86-64.so.2 lib64
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cp /lib/x86_64-linux-gnu/libnss* lib/x86_64-linux-gnu
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for dbin in /bin/sh /bin/ls /bin/mkdir /bin/cat /bin/rm /bin/sed /usr/bin/rsync /usr/bin/lastlog /usr/bin/touch /usr/sbin/sshd /usr/lib/openssh/sftp-server; do
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cp -f "${dbin}" "${JAILDIR}/${jail}/${dbin}";
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for lib in $(ldd "${dbin}" | grep -Eo "/.*so.[0-9\.]+"); do
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cp -p "${lib}" "${JAILDIR}/${jail}/${lib}"
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done
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done
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}
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## sub functions : functions call by subcommand
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sub_init() {
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jail="${1}"
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sshd_config="${TPLDIR}/sshd_config"
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inctpl="${TPLDIR}/inc.tpl"
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[ -f "${LOCALTPLDIR}/sshd_config" ] && sshd_config="${LOCALTPLDIR}/sshd_config"
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[ -f "${LOCALTPLDIR}/inc.tpl" ] && inctpl="${LOCALTPLDIR}/inc.tpl"
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check_jail "${jail}" && error "${jail} : trying to create existant jail"
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rootdir=$(dirname "${JAILDIR}")
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rootdir_inode=$(stat --format=%i "${rootdir}")
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jaildir_inode=$(stat --format=%i "${JAILDIR}")
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if [ "${rootdir_inode}" -eq 256 ] || [ "${jaildir_inode}" -eq 256 ]; then
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"${BTRFS}" subvolume create "${JAILDIR}/${jail}"
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else
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mkdir -p "${JAILDIR}/${jail}"
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fi
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mk_jail "${jail}"
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info "4 - Copie default sshd_config"
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install -m 0640 "${sshd_config}" "${JAILDIR}/${jail}/${SSHD_CONFIG}"
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info "5 - Set usable sshd port"
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set_port "${jail}" auto
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info "6 - Copie default inc configuration"
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install -m 0640 "${inctpl}" "${CONFDIR}/${jail}"
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notice "${jail} : created jail"
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}
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sub_update() {
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jail="${1}"
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check_jail "${jail}" || error "${jail} : trying to update inexistant jail"
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check_jail_on "${jail}" && sub_stop "${jail}"
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mk_jail "${jail}"
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notice "${jail} : updated jail"
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}
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sub_remove() {
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jail="${1}"
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check_jail "${jail}" || error "${jail} : trying to remove inexistant jail"
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check_jail_on "${jail}" && sub_stop "${jail}"
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rm -f "${CONFDIR}/${jail}"
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jail_inode=$(stat --format=%i "${JAILDIR}/${jail}")
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if [ "${jail_inode}" -eq 256 ]; then
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"${BTRFS}" subvolume delete "${JAILDIR}/${jail}" | debug
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else
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rm -rf "${JAILDIR}/${jail}" | debug
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fi
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if [ -d "${INCDIR}/${jail}" ]; then
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incs=$(ls "${INCDIR}/${jail}")
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for inc in ${incs}; do
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inc_inode=$(stat --format=%i "${INCDIR}/${jail}/${inc}")
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if [ "${inc_inode}" -eq 256 ]; then
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"${BTRFS}" subvolume delete "${INCDIR}/${jail}/${inc}" | debug
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else
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warning "You need to purge ${INCDIR}/${jail}/${inc} manually !"
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fi
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done
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rmdir --ignore-fail-on-non-empty "${INCDIR}/${jail}" | debug
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fi
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set_firewall "${jail}"
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notice "${jail} : deleted jail"
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}
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sub_start() {
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jail="${1}"
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check_jail "${jail}" || error "${jail} : trying to start inexistant jail"
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check_jail_on "${jail}" && error "${jail} : trying to start already running jail"
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cd "${JAILDIR}/${jail}"
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grep -q "${JAILDIR}/${jail}/proc" /proc/mounts || mount -t proc "proc-${jail}" proc
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grep -q "${JAILDIR}/${jail}/dev" /proc/mounts || mount -nt tmpfs "dev-${jail}" dev
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[ -e "dev/console" ] || mknod -m 622 dev/console c 5 1
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[ -e "dev/null" ] || mknod -m 666 dev/null c 1 3
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[ -e "dev/zero" ] || mknod -m 666 dev/zero c 1 5
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[ -e "dev/ptmx" ] || mknod -m 666 dev/ptmx c 5 2
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[ -e "dev/tty" ] || mknod -m 666 dev/tty c 5 0
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[ -e "dev/random" ] || mknod -m 444 dev/random c 1 8
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[ -e "dev/urandom" ] || mknod -m 444 dev/urandom c 1 9
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chown root:tty dev/console dev/ptmx dev/tty
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ln -fs proc/self/fd dev/fd
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ln -fs proc/self/fd/0 dev/stdin
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ln -fs proc/self/fd/1 dev/stdout
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ln -fs proc/self/fd/2 dev/stderr
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ln -fs proc/kcore dev/core
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mkdir -p dev/pts
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mkdir -p dev/shm
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grep -q "${JAILDIR}/${jail}/dev/pts" /proc/mounts || mount -t devpts -o gid=4,mode=620 none dev/pts
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grep -q "${JAILDIR}/${jail}/dev/shm" /proc/mounts || mount -t tmpfs none dev/shm
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chroot "${JAILDIR}/${jail}" /usr/sbin/sshd -E /var/log/authlog || error "${jail} : error on starting sshd"
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pid=$(cat "${JAILDIR}/${jail}/${SSHD_PID}")
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notice "${jail} was started [${pid}]"
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}
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sub_stop() {
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jail="${1}"
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check_jail "${jail}" || error "${jail} : trying to stop inexistant jail"
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check_jail_on "${jail}" || error "${jail} : trying to stop not running jail"
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pid=$(cat "${JAILDIR}/${jail}/${SSHD_PID}")
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for conn in $(ps --ppid "${pid}" -o pid=); do
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kill "${conn}"
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done
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kill "${pid}" && notice "${jail} was stopped [${pid}]"
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umount --lazy --recursive "${JAILDIR}/${jail}/dev"
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umount --lazy "${JAILDIR}/${jail}/proc/"
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}
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sub_reload() {
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jail="${1}"
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check_jail "${jail}" || error "${jail} : trying to reload inexistant jail"
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check_jail_on "${jail}" || error "${jail} : trying to reload not running jail"
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pid=$(cat "${JAILDIR}/${jail}/${SSHD_PID}")
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kill -HUP "${pid}" && notice "${jail} was reloaded [${pid}]"
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}
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sub_status() {
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jail="${1}"
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check_jail "${jail}" || error "${jail} : inexistant jail ! Use '$0 status' for list all"
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inc=$(get_inc "${jail}")
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if ( check_jail_on "${jail}" ); then
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status="ON "
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else
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status="OFF"
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fi
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port=$(get_port "${jail}")
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ip=$(get_ip "${jail}"|xargs|tr -s ' ' ',')
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echo "${jail} ${status} ${port} ${inc} ${ip}" | awk '{ printf("%- 30s %- 10s %- 10s %- 10s %- 40s\n", $1, $2, $3, $4, $5); }'
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}
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sub_params() {
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jail="${1}"
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params="${2}"
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option="${3}"
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check_jail "${jail}" || error "${jail} : inexistant jail'"
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if [ -z "${option}" ]; then
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"get_${params}" "${jail}"
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else
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"set_${params}" "${jail}" "${option}"
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check_jail_on "${jail}" && sub_reload "${jail}"
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notice "${jail} : update ${params} => ${option}"
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fi
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}
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sub_sync() {
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jail="${1}"
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check_jail "${jail}" || error "${jail} : trying to sync inexistant jail"
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[ -n "${NODE}" ] || error "Sync need config of \$NODE in /etc/default/bkctld !"
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jail="${1}"
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ssh "${NODE}" bkctld init "${jail}" | debug
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rsync -a "${JAILDIR}/${jail}/" "${NODE}:${JAILDIR}/${jail}/" --exclude proc/* --exclude sys/* --exclude dev/* --exclude run --exclude var/backup/*
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rsync -a "${CONFDIR}/${jail}" "${NODE}:${CONFDIR}/${jail}"
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if ( check_jail_on "${jail}" ); then
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ssh "${NODE}" bkctld start "${jail}" | debug
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fi
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if [ -n "${FIREWALL_RULES}" ]; then
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rsync -a "${FIREWALL_RULES}" "${NODE}:${FIREWALL_RULES}"
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ssh "${NODE}" /etc/init.d/minifirewall restart | debug
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fi
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}
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sub_inc() {
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date=$(date +"%Y-%m-%d-%H")
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jails=$(ls "${JAILDIR}")
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for jail in ${jails}; do
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inc="${INCDIR}/${jail}/${date}"
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mkdir -p "${INCDIR}/${jail}"
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if [ ! -d "${inc}" ]; then
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start=$(date +"%H:%M:%S")
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jail_inode=$(stat --format=%i "${JAILDIR}/${jail}")
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if [ "$jail_inode" -eq 256 ]; then
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"${BTRFS}" subvolume snapshot -r "${JAILDIR}/${jail}" "${inc}" | debug
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else
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cp -alx "${JAILDIR}/${jail}/" "${inc}" | debug
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fi
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end=$(date +"%H:%M:%S")
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notice "${jail} : made ${date} inc [${start}/${end}]"
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else
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warning "${jail} : trying to made already existant inc"
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fi
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done
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}
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sub_rm() {
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empty="/tmp/bkctld-${$}-$(date +%N))"
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mkdir "${empty}"
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pidfile="/var/run/bkctld-rm.pid"
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if [ -f "${pidfile}" ]; then
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pid=$(cat "${pidfile}")
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ps -u "${pid}" >/dev/null
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if [ "${?}" -eq 0 ]; then
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kill -9 "${pid}"
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warning "${0} rm always run (PID ${pid}), killed by ${$} !"
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fi
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rm "${pidfile}"
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fi
|
|
echo "${$}" > "${pidfile}"
|
|
jails=$(ls "${JAILDIR}")
|
|
for jail in ${jails}; do
|
|
incs=$(ls "${INCDIR}/${jail}")
|
|
if [ -f "${CONFDIR}/${jail}" ]; then
|
|
keepfile="${CONFDIR}/.keep-${jail}"
|
|
while read j; do
|
|
date=$( echo "${j}" | cut -d. -f1 )
|
|
before=$( echo "${j}" | cut -d. -f2 )
|
|
date -d "$(date "${date}") ${before}" "+%Y-%m-%d"
|
|
done < "${CONFDIR}/${jail}" > "${keepfile}"
|
|
for j in $(echo "${incs}" | grep -v -f "${keepfile}"); do
|
|
start=$(date +"%H:%M:%S")
|
|
inc_inode=$(stat --format=%i "${INCDIR}/${jail}/${j}")
|
|
if [ "${inc_inode}" -eq 256 ]; then
|
|
"${BTRFS}" subvolume delete "${INCDIR}/${jail}/${j}" | debug
|
|
else
|
|
cd "${INCDIR}/${jail}"
|
|
rsync -a --delete "${empty}/" "${j}/"
|
|
rmdir "${j}"
|
|
fi
|
|
end=$(date +"%H:%M:%S")
|
|
notice "${jail} : deleted ${j} inc [${start}/${end}]"
|
|
done
|
|
fi
|
|
done
|
|
rmdir "${empty}"
|
|
rm "${pidfile}"
|
|
}
|
|
|
|
## main function : check usage and valid params
|
|
|
|
main() {
|
|
[ "$(id -u)" -ne 0 ] && error "You need to be root to run ${0} !"
|
|
|
|
[ -f /etc/default/bkctld ] && . /etc/default/bkctld
|
|
CONFDIR="${CONFDIR:-/etc/evobackup}"
|
|
JAILDIR="${JAILDIR:-/backup/jails}"
|
|
INCDIR="${INCDIR:-/backup/incs}"
|
|
TPLDIR="${TPLDIR:-/usr/share/bkctld}"
|
|
LOCALTPLDIR="${LOCALTPLDIR:-/usr/local/share/bkctld}"
|
|
SSHD_PID="${SSHD_PID:-/run/sshd.pid}"
|
|
SSHD_CONFIG="${SSHD_CONFIG:-/etc/ssh/sshd_config}"
|
|
AUTHORIZED_KEYS="${AUTHORIZED_KEYS:-/root/.ssh/authorized_keys}"
|
|
FIREWALL_RULES="${FIREWALL_RULES:-}"
|
|
LOGLEVEL="${LOGLEVEL:-6}"
|
|
BTRFS=$(command -v btrfs)
|
|
mkdir -p "${CONFDIR}" "${JAILDIR}" "${INCDIR}"
|
|
subcommand="${1:-}"
|
|
jail="${2:-}"
|
|
option="${3:-}"
|
|
case "${subcommand}" in
|
|
"" | "-h" | "--help")
|
|
usage
|
|
;;
|
|
"inc" | "rm")
|
|
"sub_${subcommand}"
|
|
;;
|
|
"init")
|
|
if [ -n "${jail}" ]; then
|
|
"sub_${subcommand}" "${jail}"
|
|
else
|
|
usage
|
|
fi
|
|
;;
|
|
"key" | "port" | "ip")
|
|
if [ -n "${jail}" ]; then
|
|
sub_params "${jail}" "${subcommand}" "${option}"
|
|
else
|
|
usage
|
|
fi
|
|
;;
|
|
"start" | "stop" | "reload" | "restart" | "sync" | "update" | "remove")
|
|
if [ -n "${jail}" ]; then
|
|
if [ "${jail}" = "all" ]; then
|
|
jails=$(ls "${JAILDIR}")
|
|
for jail in ${jails}; do
|
|
case "${subcommand}" in
|
|
"start")
|
|
check_jail_on "${jail}" || "sub_${subcommand}" "${jail}"
|
|
;;
|
|
"stop" | "reload")
|
|
check_jail_on "${jail}" && "sub_${subcommand}" "${jail}"
|
|
;;
|
|
"restart")
|
|
check_jail_on "${jail}" && sub_stop "${jail}"
|
|
sub_start "${jail}"
|
|
;;
|
|
*)
|
|
"sub_${subcommand}" "${jail}"
|
|
;;
|
|
esac
|
|
done
|
|
else
|
|
if [ "${subcommand}" != "restart" ]; then
|
|
"sub_${subcommand}" "${jail}"
|
|
else
|
|
check_jail_on "${jail}" && sub_stop "${jail}"
|
|
sub_start "${jail}"
|
|
fi
|
|
fi
|
|
else
|
|
usage
|
|
fi
|
|
;;
|
|
"status")
|
|
if [ -z "${jail}" ]; then
|
|
jails=$(ls "${JAILDIR}")
|
|
for jail in ${jails}; do
|
|
"sub_${subcommand}" "${jail}"
|
|
done
|
|
else
|
|
"sub_${subcommand}" "${jail}"
|
|
fi
|
|
;;
|
|
*)
|
|
shift
|
|
warning "'${subcommand}' is not a known subcommand." && usage
|
|
exit 1
|
|
;;
|
|
esac
|
|
}
|
|
|
|
main "${@}"
|