#!/bin/sh
#
# Start jail <jailname> or all
# Usage: start <jailname>|all
#

# shellcheck source=./includes
LIBDIR="$(dirname $0)" && . "${LIBDIR}/includes"

jail_name="${1:?}"
if [ -z "${jail_name}" ]; then
    "${LIBDIR}/bkctld-help" && exit 1
fi
jail_path=$(jail_path "${jail_name}")

test -d "${jail_path}" || error "${jail_name}: jail is missing."

"${LIBDIR}/bkctld-is-on" "${jail_name}" && exit 0

cd "${jail_path}" || error "${jail_name}: failed to change directory to ${jail_path}."

grep -q "${jail_path}/proc" /proc/mounts || mount -t proc "proc-${jail_name}" proc
grep -q "${jail_path}/dev" /proc/mounts || mount -nt tmpfs "dev-${jail_name}" dev
[ -e "dev/console" ] || mknod -m 622 dev/console c 5 1
[ -e "dev/null" ] || mknod -m 666 dev/null c 1 3
[ -e "dev/zero" ] || mknod -m 666 dev/zero c 1 5
[ -e "dev/ptmx" ] || mknod -m 666 dev/ptmx c 5 2
[ -e "dev/tty" ] || mknod -m 666 dev/tty c 5 0
[ -e "dev/random" ] || mknod -m 444 dev/random c 1 8
[ -e "dev/urandom" ] || mknod -m 444 dev/urandom c 1 9
chown root:tty dev/console dev/ptmx dev/tty
ln -fs proc/self/fd dev/fd
ln -fs proc/self/fd/0 dev/stdin
ln -fs proc/self/fd/1 dev/stdout
ln -fs proc/self/fd/2 dev/stderr
ln -fs proc/kcore dev/core
mkdir -p dev/pts
mkdir -p dev/shm
grep -q "${jail_path}/dev/pts" /proc/mounts || mount -t devpts -o gid=4,mode=620 none dev/pts
grep -q "${jail_path}/dev/shm" /proc/mounts || mount -t tmpfs none dev/shm

chroot "${jail_path}" /usr/sbin/sshd -E /var/log/authlog || error "${jail_name}: failed to start sshd"
pidfile="${jail_path}/${SSHD_PID}"

for try in $(seq 1 10); do
    test -f "${pidfile}" || sleep 0.3
done
pid=$(cat "${pidfile}")

notice "${jail_name}: jail has been started [${pid}]"