freebsd-dev/etc/rc.d/jail
Peter Wemm 78389e87b2 Temporarily remove the warning added r270781 - it prints the warning
regardless of whether the usage is correct or not and this generates a
LOT of noise, even when you have specified a mask.
2014-09-08 05:14:58 +00:00

570 lines
13 KiB
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Executable File

#!/bin/sh
#
# $FreeBSD$
#
# PROVIDE: jail
# REQUIRE: LOGIN FILESYSTEMS
# BEFORE: securelevel
# KEYWORD: nojail shutdown
. /etc/rc.subr
name="jail"
rcvar="jail_enable"
start_cmd="jail_start"
start_postcmd="jail_warn"
stop_cmd="jail_stop"
config_cmd="jail_config"
console_cmd="jail_console"
status_cmd="jail_status"
extra_commands="config console status"
: ${jail_conf:=/etc/jail.conf}
: ${jail_program:=/usr/sbin/jail}
: ${jail_consolecmd:=/usr/bin/login -f root}
: ${jail_jexec:=/usr/sbin/jexec}
: ${jail_jls:=/usr/sbin/jls}
need_dad_wait=
# extact_var jail name param num defval
# Extract value from ${jail_$jail_$name} or ${jail_$name} and
# set it to $param. If not defined, $defval is used.
# When $num is [0-9]*, ${jail_$jail_$name$num} are looked up and
# $param is set by using +=.
# When $num is YN or NY, the value is interpret as boolean.
extract_var()
{
local i _j _name _param _num _def _name1 _name2
_j=$1
_name=$2
_param=$3
_num=$4
_def=$5
case $_num in
YN)
_name1=jail_${_j}_${_name}
_name2=jail_${_name}
eval $_name1=\"\${$_name1:-\${$_name2:-$_def}}\"
if checkyesno $_name1; then
echo " $_param = 1;"
else
echo " $_param = 0;"
fi
;;
NY)
_name1=jail_${_j}_${_name}
_name2=jail_${_name}
eval $_name1=\"\${$_name1:-\${$_name2:-$_def}}\"
if checkyesno $_name1; then
echo " $_param = 0;"
else
echo " $_param = 1;"
fi
;;
[0-9]*)
i=$_num
while : ; do
_name1=jail_${_j}_${_name}${i}
_name2=jail_${_name}${i}
eval _tmpargs=\"\${$_name1:-\${$_name2:-$_def}}\"
if [ -n "$_tmpargs" ]; then
echo " $_param += \"$_tmpargs\";"
else
break;
fi
i=$(($i + 1))
done
;;
*)
_name1=jail_${_j}_${_name}
_name2=jail_${_name}
eval _tmpargs=\"\${$_name1:-\${$_name2:-$_def}}\"
if [ -n "$_tmpargs" ]; then
echo " $_param = \"$_tmpargs\";"
fi
;;
esac
}
# parse_options _j
# Parse options and create a temporary configuration file if necessary.
#
parse_options()
{
local _j _p
_j=$1
_confwarn=0
if [ -z "$_j" ]; then
warn "parse_options: you must specify a jail"
return
fi
eval _jconf=\"\${jail_${_j}_conf:-/etc/jail.${_j}.conf}\"
eval _rootdir=\"\$jail_${_j}_rootdir\"
eval _hostname=\"\$jail_${_j}_hostname\"
if [ -z "$_rootdir" -o \
-z "$_hostname" ]; then
if [ -r "$_jconf" ]; then
_conf="$_jconf"
return 0
elif [ -r "$jail_conf" ]; then
_conf="$jail_conf"
return 0
else
warn "Invalid configuration for $_j " \
"(no jail.conf, no hostname, or no path). " \
"Jail $_j was ignored."
fi
return 1
fi
eval _ip=\"\$jail_${_j}_ip\"
if [ -z "$_ip" ] && ! check_kern_features vimage; then
warn "no ipaddress specified and no vimage support. " \
"Jail $_j was ignored."
return 1
fi
_conf=/var/run/jail.${_j}.conf
#
# To relieve confusion, show a warning message.
#
_confwarn=1
if [ -r "$jail_conf" -o -r "$_jconf" ]; then
if ! checkyesno jail_parallel_start; then
warn "$_conf is created and used for jail $_j."
fi
fi
/usr/bin/install -m 0644 -o root -g wheel /dev/null $_conf || return 1
eval : \${jail_${_j}_flags:=${jail_flags}}
eval _exec=\"\$jail_${_j}_exec\"
eval _exec_start=\"\$jail_${_j}_exec_start\"
eval _exec_stop=\"\$jail_${_j}_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
eval _interface=\"\${jail_${_j}_interface:-${jail_interface}}\"
eval _parameters=\"\${jail_${_j}_parameters:-${jail_parameters}}\"
eval _fstab=\"\${jail_${_j}_fstab:-${jail_fstab:-/etc/fstab.$_j}}\"
(
date +"# Generated by rc.d/jail at %Y-%m-%d %H:%M:%S"
echo "$_j {"
extract_var $_j hostname host.hostname - ""
extract_var $_j rootdir path - ""
if [ -n "$_ip" ]; then
extract_var $_j interface interface - ""
jail_handle_ips_option $_ip $_interface
alias=0
while : ; do
eval _x=\"\$jail_${_j}_ip_multi${alias}\"
[ -z "$_x" ] && break
jail_handle_ips_option $_x $_interface
alias=$(($alias + 1))
done
case $need_dad_wait in
1)
# Sleep to let DAD complete before
# starting services.
echo " exec.start += \"sleep " \
$(($(${SYSCTL_N} net.inet6.ip6.dad_count) + 1)) \
"\";"
;;
esac
# These are applicable only to non-vimage jails.
extract_var $_j fib exec.fib - ""
extract_var $_j socket_unixiproute_only \
allow.raw_sockets NY YES
else
echo " vnet;"
extract_var $_j vnet_interface vnet.interface - ""
fi
echo " exec.clean;"
echo " exec.system_user = \"root\";"
echo " exec.jail_user = \"root\";"
extract_var $_j exec_prestart exec.prestart 0 ""
extract_var $_j exec_poststart exec.poststart 0 ""
extract_var $_j exec_prestop exec.prestop 0 ""
extract_var $_j exec_poststop exec.poststop 0 ""
echo " exec.start += \"$_exec_start\";"
extract_var $_j exec_afterstart exec.start 1 ""
echo " exec.stop = \"$_exec_stop\";"
extract_var $_j consolelog exec.consolelog - \
/var/log/jail_${_j}_console.log
if [ -r $_fstab ]; then
echo " mount.fstab = \"$_fstab\";"
fi
eval : \${jail_${_j}_devfs_enable:=${jail_devfs_enable:-NO}}
if checkyesno jail_${_j}_devfs_enable; then
echo " mount.devfs;"
eval _ruleset=\${jail_${_j}_devfs_ruleset:-${jail_devfs_ruleset}}
case $_ruleset in
"") ;;
[0-9]*) echo " devfs_ruleset = \"$_ruleset\";" ;;
devfsrules_jail)
# XXX: This is the default value,
# Let jail(8) to use the default because
# mount(8) only accepts an integer.
# This should accept a ruleset name.
;;
*) warn "devfs_ruleset must be an integer." ;;
esac
fi
eval : \${jail_${_j}_fdescfs_enable:=${jail_fdescfs_enable:-NO}}
if checkyesno jail_${_j}_fdescfs_enable; then
echo " mount.fdescfs;"
fi
eval : \${jail_${_j}_procfs_enable:=${jail_procfs_enable:-NO}}
if checkyesno jail_${_j}_procfs_enable; then
echo " mount += " \
"\"procfs ${_rootdir%/}/proc procfs rw 0 0\";"
fi
eval : \${jail_${_j}_mount_enable:=${jail_mount_enable:-NO}}
if checkyesno jail_${_j}_mount_enable; then
echo " allow.mount;" >> $_conf
fi
extract_var $_j set_hostname_allow allow.set_hostname YN NO
extract_var $_j sysvipc_allow allow.sysvipc YN NO
for _p in $_parameters; do
echo " ${_p%\;};"
done
echo "}"
) >> $_conf
return 0
}
# jail_extract_address argument iface
# The second argument is the string from one of the _ip
# or the _multi variables. In case of a comma separated list
# only one argument must be passed in at a time.
# The function alters the _type, _iface, _addr and _mask variables.
#
jail_extract_address()
{
local _i _interface
_i=$1
_interface=$2
if [ -z "${_i}" ]; then
warn "jail_extract_address: called without input"
return
fi
# Check if we have an interface prefix given and split into
# iFace and rest.
case "${_i}" in
*\|*) # ifN|.. prefix there
_iface=${_i%%|*}
_r=${_i##*|}
;;
*) _iface=""
_r=${_i}
;;
esac
# In case the IP has no interface given, check if we have a global one.
_iface=${_iface:-${_interface}}
# Set address, cut off any prefix/netmask/prefixlen.
_addr=${_r}
_addr=${_addr%%[/ ]*}
# Theoretically we can return here if interface is not set,
# as we only care about the _mask if we call ifconfig.
# This is not done because we may want to santize IP addresses
# based on _type later, and optionally change the type as well.
# Extract the prefix/netmask/prefixlen part by cutting off the address.
_mask=${_r}
_mask=`expr "${_mask}" : "${_addr}\(.*\)"`
# Identify type {inet,inet6}.
case "${_addr}" in
*\.*\.*\.*) _type="inet" ;;
*:*) _type="inet6" ;;
*) warn "jail_extract_address: type not identified"
;;
esac
# Handle the special /netmask instead of /prefix or
# "netmask xxx" case for legacy IP.
# We do NOT support shortend class-full netmasks.
if [ "${_type}" = "inet" ]; then
case "${_mask}" in
/*\.*\.*\.*) _mask=" netmask ${_mask#/}" ;;
*) ;;
esac
# In case _mask is still not set use /32.
_mask=${_mask:-/32}
elif [ "${_type}" = "inet6" ]; then
# In case _mask is not set for IPv6, use /128.
_mask=${_mask:-/128}
fi
}
# jail_handle_ips_option input iface
# Handle a single argument imput which can be a comma separated
# list of addresses (theoretically with an option interface and
# prefix/netmask/prefixlen).
#
jail_handle_ips_option()
{
local _x _type _i _defif
_x=$1
_defif=$2
if [ -z "${_x}" ]; then
# No IP given. This can happen for the primary address
# of each address family.
return
fi
# Loop, in case we find a comma separated list, we need to handle
# each argument on its own.
while [ ${#_x} -gt 0 ]; do
case "${_x}" in
*,*) # Extract the first argument and strip it off the list.
_i=`expr "${_x}" : '^\([^,]*\)'`
_x=`expr "${_x}" : "^[^,]*,\(.*\)"`
;;
*) _i=${_x}
_x=""
;;
esac
_type=""
_addr=""
_mask=""
_iface=""
jail_extract_address $_i $_defif
# make sure we got an address.
case $_addr in
"") continue ;;
*) ;;
esac
# Append address to list of addresses for the jail command.
case $_type in
inet)
echo " ip4.addr += \"${_iface:+${_iface}|}${_addr}${_mask}\";"
;;
inet6)
echo " ip6.addr += \"${_iface:+${_iface}|}${_addr}${_mask}\";"
need_dad_wait=1
;;
esac
done
}
jail_config()
{
local _j
case $1 in
_ALL) return ;;
esac
for _j in $@; do
_j=$(echo $_j | tr /. _)
if parse_options $_j; then
echo "$_j: parameters are in $_conf."
fi
done
}
jail_console()
{
local _j _cmd
# One argument that is not _ALL.
case $#:$1 in
0:*|1:_ALL) err 3 "Specify a jail name." ;;
1:*) ;;
esac
_j=$(echo $1 | tr /. _)
shift
case $# in
0) eval _cmd=\${jail_${_j}_consolecmd:-$jail_consolecmd} ;;
*) _cmd=$@ ;;
esac
$jail_jexec $_j $_cmd
}
jail_status()
{
$jail_jls -N
}
jail_start()
{
local _j _jid _jl
if [ $# = 0 ]; then
return
fi
echo -n 'Starting jails:'
case $1 in
_ALL)
command=$jail_program
rc_flags=$jail_flags
command_args="-f $jail_conf -c"
_tmp=`mktemp -t jail` || exit 3
if $command $rc_flags $command_args >> $_tmp 2>&1; then
$jail_jls jid name | while read IN; do
set -- $IN
echo -n " $2"
echo $1 > /var/run/jail_$2.id
done
else
tail -1 $_tmp
fi
rm -f $_tmp
echo '.'
return
;;
esac
if checkyesno jail_parallel_start; then
#
# Start jails in parallel and then check jail id when
# jail_parallel_start is YES.
#
_jl=
for _j in $@; do
_j=$(echo $_j | tr /. _)
parse_options $_j || continue
_jl="$_jl $_j"
eval rc_flags=\${jail_${_j}_flags:-$jail_flags}
eval command=\${jail_${_j}_program:-$jail_program}
command_args="-i -f $_conf -c $_j"
$command $rc_flags $command_args \
>/dev/null 2>&1 </dev/null &
done
sleep 1
for _j in $_jl; do
echo -n " ${_hostname:-${_j}}"
if _jid=$($jail_jls -j $_j jid); then
echo "$_jid" > /var/run/jail_${_j}.id
else
rm -f /var/run/jail_${_j}.id
echo " cannot start jail " \
"\"${_hostname:-${_j}}\": "
fi
done
else
#
# Start jails one-by-one when jail_parallel_start is NO.
#
for _j in $@; do
_j=$(echo $_j | tr /. _)
parse_options $_j || continue
eval rc_flags=\${jail_${_j}_flags:-$jail_flags}
eval command=\${jail_${_j}_program:-$jail_program}
command_args="-i -f $_conf -c $_j"
_tmp=`mktemp -t jail` || exit 3
if $command $rc_flags $command_args \
>> $_tmp 2>&1 </dev/null; then
echo -n " ${_hostname:-${_j}}"
_jid=$($jail_jls -j $_j jid)
echo $_jid > /var/run/jail_${_j}.id
else
rm -f /var/run/jail_${_j}.id
echo " cannot start jail " \
"\"${_hostname:-${_j}}\": "
cat $_tmp
fi
rm -f $_tmp
done
fi
echo '.'
}
jail_stop()
{
local _j
if [ $# = 0 ]; then
return
fi
echo -n 'Stopping jails:'
case $1 in
_ALL)
command=$jail_program
rc_flags=$jail_flags
command_args="-f $jail_conf -r"
$jail_jls name | while read _j; do
echo -n " $_j"
_tmp=`mktemp -t jail` || exit 3
$command $rc_flags $command_args $_j >> $_tmp 2>&1
if $jail_jls -j $_j > /dev/null 2>&1; then
tail -1 $_tmp
else
rm -f /var/run/jail_${_j}.id
fi
rm -f $_tmp
done
echo '.'
return
;;
esac
for _j in $@; do
_j=$(echo $_j | tr /. _)
parse_options $_j || continue
if ! $jail_jls -j $_j > /dev/null 2>&1; then
continue
fi
eval command=\${jail_${_j}_program:-$jail_program}
echo -n " ${_hostname:-${_j}}"
_tmp=`mktemp -t jail` || exit 3
$command -q -f $_conf -r $_j >> $_tmp 2>&1
if $jail_jls -j $_j > /dev/null 2>&1; then
tail -1 $_tmp
else
rm -f /var/run/jail_${_j}.id
fi
rm -f $_tmp
done
echo '.'
}
jail_warn()
{
# To relieve confusion, show a warning message.
case $_confwarn in
1) warn "Per-jail configuration via jail_* variables " \
"is obsolete. Please consider to migrate to $jail_conf."
;;
esac
}
load_rc_config $name
case $# in
1) run_rc_command $@ ${jail_list:-_ALL} ;;
*) run_rc_command $@ ;;
esac