freebsd-dev/etc/rc.d/jail
Matteo Riondato ce5c66f0b2 Add jail_<jname>_exec_afterstart<N> rc.conf variable, where <N> is
1,2 and so on.
It specifies the command to be run as Nth after jail startup.

sh(1)-fu by: Dario Freni
PR: 	conf/97697
MFC after: 2 weeks
Reviewed by: ru@ (man page)
2006-05-30 16:20:48 +00:00

316 lines
7.8 KiB
Bash

#!/bin/sh
#
# $FreeBSD$
#
# PROVIDE: jail
# REQUIRE: LOGIN cleanvar
# BEFORE: securelevel
# KEYWORD: nojail shutdown
. /etc/rc.subr
name="jail"
rcvar=`set_rcvar`
start_cmd="jail_start"
stop_cmd="jail_stop"
# init_variables _j
# Initialize the various jail variables for jail _j.
#
init_variables()
{
_j="$1"
if [ -z "$_j" ]; then
warn "init_variables: you must specify a jail"
return
fi
eval _rootdir=\"\$jail_${_j}_rootdir\"
_devdir="${_rootdir}/dev"
_fdescdir="${_devdir}/fd"
_procdir="${_rootdir}/proc"
eval _hostname=\"\$jail_${_j}_hostname\"
eval _ip=\"\$jail_${_j}_ip\"
eval _interface=\"\${jail_${_j}_interface:-${jail_interface}}\"
eval _exec=\"\$jail_${_j}_exec\"
eval _exec_start=\"\${jail_${_j}_exec_start:-${jail_exec_start}}\"
i=1
while [ true ]; do
eval _exec_afterstart${i}=\"\${jail_${_j}_exec_afterstart${i}:-\${jail_exec_afterstart${i}}}\"
[ -z "$(eval echo \"\$_exec_afterstart${i}\")" ] && break
i=$((i + 1))
done
eval _exec_stop=\"\${jail_${_j}_exec_stop:-${jail_exec_stop}}\"
if [ -n "${_exec}" ]; then
# simple/backward-compatible execution
_exec_start="${_exec}"
_exec_stop=""
else
# flexible execution
if [ -z "${_exec_start}" ]; then
_exec_start="/bin/sh /etc/rc"
if [ -z "${_exec_stop}" ]; then
_exec_stop="/bin/sh /etc/rc.shutdown"
fi
fi
fi
# The default jail ruleset will be used by rc.subr if none is specified.
eval _ruleset=\"\${jail_${_j}_devfs_ruleset:-${jail_devfs_ruleset}}\"
eval _devfs=\"\${jail_${_j}_devfs_enable:-${jail_devfs_enable}}\"
[ -z "${_devfs}" ] && _devfs="NO"
eval _fdescfs=\"\${jail_${_j}_fdescfs_enable:-${jail_fdescfs_enable}}\"
[ -z "${_fdescfs}" ] && _fdescfs="NO"
eval _procfs=\"\${jail_${_j}_procfs_enable:-${jail_procfs_enable}}\"
[ -z "${_procfs}" ] && _procfs="NO"
eval _mount=\"\${jail_${_j}_mount_enable:-${jail_mount_enable}}\"
[ -z "${_mount}" ] && _mount="NO"
# "/etc/fstab.${_j}" will be used for {,u}mount(8) if none is specified.
eval _fstab=\"\${jail_${_j}_fstab:-${jail_fstab}}\"
[ -z "${_fstab}" ] && _fstab="/etc/fstab.${_j}"
eval _flags=\"\${jail_${_j}_flags:-${jail_flags}}\"
[ -z "${_flags}" ] && _flags="-l -U root"
# Debugging aid
#
debug "$_j devfs enable: $_devfs"
debug "$_j fdescfs enable: $_fdescfs"
debug "$_j procfs enable: $_procfs"
debug "$_j mount enable: $_mount"
debug "$_j hostname: $_hostname"
debug "$_j ip: $_ip"
debug "$_j interface: $_interface"
debug "$_j root: $_rootdir"
debug "$_j devdir: $_devdir"
debug "$_j fdescdir: $_fdescdir"
debug "$_j procdir: $_procdir"
debug "$_j ruleset: $_ruleset"
debug "$_j fstab: $_fstab"
debug "$_j exec start: $_exec_start"
i=1
while [ true ]; do
eval out=\"\${_exec_afterstart${i}:-''}\"
if [ -z "$out" ]; then
break;
fi
debug "$_j exec after start #${i}: ${out}"
i=$((i + 1))
done
debug "$_j exec stop: $_exec_stop"
debug "$_j flags: $_flags"
if [ -z "${_hostname}" ]; then
err 3 "$name: No hostname has been defined for ${_j}"
fi
if [ -z "${_rootdir}" ]; then
err 3 "$name: No root directory has been defined for ${_j}"
fi
if [ -z "${_ip}" ]; then
err 3 "$name: No IP address has been defined for ${_j}"
fi
}
# set_sysctl rc_knob mib msg
# If the mib sysctl is set according to what rc_knob
# specifies, this function does nothing. However if
# rc_knob is set differently than mib, then the mib
# is set accordingly and msg is displayed followed by
# an '=" sign and the word 'YES' or 'NO'.
#
set_sysctl()
{
_knob="$1"
_mib="$2"
_msg="$3"
_current=`${SYSCTL} -n $_mib 2>/dev/null`
if checkyesno $_knob ; then
if [ "$_current" -ne 1 ]; then
echo -n " ${_msg}=YES"
${SYSCTL_W} 1>/dev/null ${_mib}=1
fi
else
if [ "$_current" -ne 0 ]; then
echo -n " ${_msg}=NO"
${SYSCTL_W} 1>/dev/null ${_mib}=0
fi
fi
}
# jail_umount_fs
# This function unmounts certain special filesystems in the
# currently selected jail. The caller must call the init_variables()
# routine before calling this one.
#
jail_umount_fs()
{
if checkyesno _fdescfs; then
if [ -d "${_fdescdir}" ] ; then
umount -f ${_fdescdir} >/dev/null 2>&1
fi
fi
if checkyesno _devfs; then
if [ -d "${_devdir}" ] ; then
umount -f ${_devdir} >/dev/null 2>&1
fi
fi
if checkyesno _procfs; then
if [ -d "${_procdir}" ] ; then
umount -f ${_procdir} >/dev/null 2>&1
fi
fi
if checkyesno _mount; then
[ -f "${_fstab}" ] || warn "${_fstab} does not exist"
umount -a -F "${_fstab}" >/dev/null 2>&1
fi
}
jail_start()
{
echo -n 'Configuring jails:'
set_sysctl jail_set_hostname_allow security.jail.set_hostname_allowed \
set_hostname_allow
set_sysctl jail_socket_unixiproute_only \
security.jail.socket_unixiproute_only unixiproute_only
set_sysctl jail_sysvipc_allow security.jail.sysvipc_allowed \
sysvipc_allow
echo '.'
echo -n 'Starting jails:'
_tmp_dir=`mktemp -d /tmp/jail.XXXXXXXX` || \
err 3 "$name: Can't create temp dir, exiting..."
for _jail in ${jail_list}
do
init_variables $_jail
if [ -f /var/run/jail_${_jail}.id ]; then
echo -n " [${_hostname} already running (/var/run/jail_${_jail}.id exists)]"
continue;
fi
if [ -n "${_interface}" ]; then
ifconfig ${_interface} alias ${_ip} netmask 255.255.255.255
fi
if checkyesno _mount; then
info "Mounting fstab for jail ${_jail} (${_fstab})"
if [ ! -f "${_fstab}" ]; then
err 3 "$name: ${_fstab} does not exist"
fi
mount -a -F "${_fstab}"
fi
if checkyesno _devfs; then
# If devfs is already mounted here, skip it.
df -t devfs "${_devdir}" >/dev/null
if [ $? -ne 0 ]; then
info "Mounting devfs on ${_devdir}"
devfs_mount_jail "${_devdir}" ${_ruleset}
# Transitional symlink for old binaries
if [ ! -L "${_devdir}/log" ]; then
__pwd="`pwd`"
cd "${_devdir}"
ln -sf ../var/run/log log
cd "$__pwd"
fi
fi
# XXX - It seems symlinks don't work when there
# is a devfs(5) device of the same name.
# Jail console output
# __pwd="`pwd`"
# cd "${_devdir}"
# ln -sf ../var/log/console console
# cd "$__pwd"
fi
if checkyesno _fdescfs; then
info "Mounting fdescfs on ${_fdescdir}"
mount -t fdescfs fdesc "${_fdescdir}"
fi
if checkyesno _procfs; then
info "Mounting procfs onto ${_procdir}"
if [ -d "${_procdir}" ] ; then
mount -t procfs proc "${_procdir}"
fi
fi
_tmp_jail=${_tmp_dir}/jail.$$
eval jail ${_flags} -i ${_rootdir} ${_hostname} \
${_ip} ${_exec_start} > ${_tmp_jail} 2>&1
if [ "$?" -eq 0 ] ; then
_jail_id=$(head -1 ${_tmp_jail})
i=1
while [ true ]; do
eval out=\"\${_exec_afterstart${i}:-''}\"
if [ -z "$out" ]; then
break;
fi
jexec "${_jail_id}" ${out}
i=$((i + 1))
done
echo -n " $_hostname"
tail +2 ${_tmp_jail} >${_rootdir}/var/log/console.log
echo ${_jail_id} > /var/run/jail_${_jail}.id
else
jail_umount_fs
if [ -n "${jail_interface}" ]; then
ifconfig ${jail_interface} -alias ${jail_ip}
fi
echo " cannot start jail \"${_jail}\": "
tail +2 ${_tmp_jail}
fi
rm -f ${_tmp_jail}
done
rmdir ${_tmp_dir}
echo '.'
}
jail_stop()
{
echo -n 'Stopping jails:'
for _jail in ${jail_list}
do
if [ -f "/var/run/jail_${_jail}.id" ]; then
_jail_id=$(cat /var/run/jail_${_jail}.id)
if [ ! -z "${_jail_id}" ]; then
init_variables $_jail
if [ -n "${_exec_stop}" ]; then
eval env -i /usr/sbin/jexec ${_jail_id} ${_exec_stop} \
>> ${_rootdir}/var/log/console.log 2>&1
fi
killall -j ${_jail_id} -TERM > /dev/null 2>&1
sleep 1
killall -j ${_jail_id} -KILL > /dev/null 2>&1
jail_umount_fs
echo -n " $_hostname"
fi
if [ -n "${_interface}" ]; then
ifconfig ${_interface} -alias ${_ip}
fi
rm /var/run/jail_${_jail}.id
else
echo " cannot stop jail ${_jail}. No jail id in /var/run"
fi
done
echo '.'
}
load_rc_config $name
cmd="$1"
if [ $# -gt 0 ]; then
shift
fi
if [ -n "$*" ]; then
jail_list="$*"
fi
run_rc_command "${cmd}"