jail revision 271214
1#!/bin/sh 2# 3# $FreeBSD: stable/10/etc/rc.d/jail 271214 2014-09-07 00:44:59Z gjb $ 4# 5 6# PROVIDE: jail 7# REQUIRE: LOGIN FILESYSTEMS 8# BEFORE: securelevel 9# KEYWORD: nojail shutdown 10 11. /etc/rc.subr 12 13name="jail" 14rcvar="jail_enable" 15 16start_cmd="jail_start" 17start_postcmd="jail_warn" 18stop_cmd="jail_stop" 19config_cmd="jail_config" 20console_cmd="jail_console" 21status_cmd="jail_status" 22extra_commands="config console status" 23: ${jail_conf:=/etc/jail.conf} 24: ${jail_program:=/usr/sbin/jail} 25: ${jail_consolecmd:=/usr/bin/login -f root} 26: ${jail_jexec:=/usr/sbin/jexec} 27: ${jail_jls:=/usr/sbin/jls} 28 29need_dad_wait= 30 31# extact_var jail name param num defval 32# Extract value from ${jail_$jail_$name} or ${jail_$name} and 33# set it to $param. If not defined, $defval is used. 34# When $num is [0-9]*, ${jail_$jail_$name$num} are looked up and 35# $param is set by using +=. 36# When $num is YN or NY, the value is interpret as boolean. 37extract_var() 38{ 39 local i _j _name _param _num _def _name1 _name2 40 _j=$1 41 _name=$2 42 _param=$3 43 _num=$4 44 _def=$5 45 46 case $_num in 47 YN) 48 _name1=jail_${_j}_${_name} 49 _name2=jail_${_name} 50 eval $_name1=\"\${$_name1:-\${$_name2:-$_def}}\" 51 if checkyesno $_name1; then 52 echo " $_param = 1;" 53 else 54 echo " $_param = 0;" 55 fi 56 ;; 57 NY) 58 _name1=jail_${_j}_${_name} 59 _name2=jail_${_name} 60 eval $_name1=\"\${$_name1:-\${$_name2:-$_def}}\" 61 if checkyesno $_name1; then 62 echo " $_param = 0;" 63 else 64 echo " $_param = 1;" 65 fi 66 ;; 67 [0-9]*) 68 i=$_num 69 while : ; do 70 _name1=jail_${_j}_${_name}${i} 71 _name2=jail_${_name}${i} 72 eval _tmpargs=\"\${$_name1:-\${$_name2:-$_def}}\" 73 if [ -n "$_tmpargs" ]; then 74 echo " $_param += \"$_tmpargs\";" 75 else 76 break; 77 fi 78 i=$(($i + 1)) 79 done 80 ;; 81 *) 82 _name1=jail_${_j}_${_name} 83 _name2=jail_${_name} 84 eval _tmpargs=\"\${$_name1:-\${$_name2:-$_def}}\" 85 if [ -n "$_tmpargs" ]; then 86 echo " $_param = \"$_tmpargs\";" 87 fi 88 ;; 89 esac 90} 91 92# parse_options _j 93# Parse options and create a temporary configuration file if necessary. 94# 95parse_options() 96{ 97 local _j _p 98 _j=$1 99 100 _confwarn=0 101 if [ -z "$_j" ]; then 102 warn "parse_options: you must specify a jail" 103 return 104 fi 105 eval _jconf=\"\${jail_${_j}_conf:-/etc/jail.${_j}.conf}\" 106 eval _rootdir=\"\$jail_${_j}_rootdir\" 107 eval _hostname=\"\$jail_${_j}_hostname\" 108 if [ -z "$_rootdir" -o \ 109 -z "$_hostname" ]; then 110 if [ -r "$_jconf" ]; then 111 _conf="$_jconf" 112 return 0 113 elif [ -r "$jail_conf" ]; then 114 _conf="$jail_conf" 115 return 0 116 else 117 warn "Invalid configuration for $_j " \ 118 "(no jail.conf, no hostname, or no path). " \ 119 "Jail $_j was ignored." 120 fi 121 return 1 122 fi 123 eval _ip=\"\$jail_${_j}_ip\" 124 if [ -z "$_ip" ] && ! check_kern_features vimage; then 125 warn "no ipaddress specified and no vimage support. " \ 126 "Jail $_j was ignored." 127 return 1 128 fi 129 _conf=/var/run/jail.${_j}.conf 130 # 131 # To relieve confusion, show a warning message. 132 # 133 _confwarn=1 134 if [ -r "$jail_conf" -o -r "$_jconf" ]; then 135 if ! checkyesno jail_parallel_start; then 136 warn "$_conf is created and used for jail $_j." 137 fi 138 fi 139 /usr/bin/install -m 0644 -o root -g wheel /dev/null $_conf || return 1 140 141 eval : \${jail_${_j}_flags:=${jail_flags}} 142 eval _exec=\"\$jail_${_j}_exec\" 143 eval _exec_start=\"\$jail_${_j}_exec_start\" 144 eval _exec_stop=\"\$jail_${_j}_exec_stop\" 145 if [ -n "${_exec}" ]; then 146 # simple/backward-compatible execution 147 _exec_start="${_exec}" 148 _exec_stop="" 149 else 150 # flexible execution 151 if [ -z "${_exec_start}" ]; then 152 _exec_start="/bin/sh /etc/rc" 153 if [ -z "${_exec_stop}" ]; then 154 _exec_stop="/bin/sh /etc/rc.shutdown" 155 fi 156 fi 157 fi 158 eval _interface=\"\${jail_${_j}_interface:-${jail_interface}}\" 159 eval _parameters=\"\${jail_${_j}_parameters:-${jail_parameters}}\" 160 eval _fstab=\"\${jail_${_j}_fstab:-${jail_fstab:-/etc/fstab.$_j}}\" 161 ( 162 date +"# Generated by rc.d/jail at %Y-%m-%d %H:%M:%S" 163 echo "$_j {" 164 extract_var $_j hostname host.hostname - "" 165 extract_var $_j rootdir path - "" 166 if [ -n "$_ip" ]; then 167 extract_var $_j interface interface - "" 168 jail_handle_ips_option $_ip $_interface 169 alias=0 170 while : ; do 171 eval _x=\"\$jail_${_j}_ip_multi${alias}\" 172 [ -z "$_x" ] && break 173 174 jail_handle_ips_option $_x $_interface 175 alias=$(($alias + 1)) 176 done 177 case $need_dad_wait in 178 1) 179 # Sleep to let DAD complete before 180 # starting services. 181 echo " exec.start += \"sleep " \ 182 $(($(${SYSCTL_N} net.inet6.ip6.dad_count) + 1)) \ 183 "\";" 184 ;; 185 esac 186 # These are applicable only to non-vimage jails. 187 extract_var $_j fib exec.fib - "" 188 extract_var $_j socket_unixiproute_only \ 189 allow.raw_sockets NY YES 190 else 191 echo " vnet;" 192 extract_var $_j vnet_interface vnet.interface - "" 193 fi 194 195 echo " exec.clean;" 196 echo " exec.system_user = \"root\";" 197 echo " exec.jail_user = \"root\";" 198 extract_var $_j exec_prestart exec.prestart 0 "" 199 extract_var $_j exec_poststart exec.poststart 0 "" 200 extract_var $_j exec_prestop exec.prestop 0 "" 201 extract_var $_j exec_poststop exec.poststop 0 "" 202 203 echo " exec.start += \"$_exec_start\";" 204 extract_var $_j exec_afterstart exec.start 1 "" 205 echo " exec.stop = \"$_exec_stop\";" 206 207 extract_var $_j consolelog exec.consolelog - \ 208 /var/log/jail_${_j}_console.log 209 210 eval : \${jail_${_j}_devfs_enable:=${jail_devfs_enable:-NO}} 211 if checkyesno jail_${_j}_devfs_enable; then 212 echo " mount.devfs;" 213 eval _ruleset=\${jail_${_j}_devfs_ruleset:-${jail_devfs_ruleset}} 214 case $_ruleset in 215 "") ;; 216 [0-9]*) echo " devfs_ruleset = \"$_ruleset\";" ;; 217 devfsrules_jail) 218 # XXX: This is the default value, 219 # Let jail(8) to use the default because 220 # mount(8) only accepts an integer. 221 # This should accept a ruleset name. 222 ;; 223 *) warn "devfs_ruleset must be an integer." ;; 224 esac 225 if [ -r $_fstab ]; then 226 echo " mount.fstab = \"$_fstab\";" 227 fi 228 fi 229 230 eval : \${jail_${_j}_fdescfs_enable:=${jail_fdescfs_enable:-NO}} 231 if checkyesno jail_${_j}_fdescfs_enable; then 232 echo " mount.fdescfs;" 233 fi 234 eval : \${jail_${_j}_procfs_enable:=${jail_procfs_enable:-NO}} 235 if checkyesno jail_${_j}_procfs_enable; then 236 echo " mount += " \ 237 "\"procfs ${_rootdir%/}/proc procfs rw 0 0\";" 238 fi 239 240 eval : \${jail_${_j}_mount_enable:=${jail_mount_enable:-NO}} 241 if checkyesno jail_${_j}_mount_enable; then 242 echo " allow.mount;" >> $_conf 243 fi 244 245 extract_var $_j set_hostname_allow allow.set_hostname YN NO 246 extract_var $_j sysvipc_allow allow.sysvipc YN NO 247 for _p in $_parameters; do 248 echo " ${_p%\;};" 249 done 250 echo "}" 251 ) >> $_conf 252 253 return 0 254} 255 256# jail_extract_address argument iface 257# The second argument is the string from one of the _ip 258# or the _multi variables. In case of a comma separated list 259# only one argument must be passed in at a time. 260# The function alters the _type, _iface, _addr and _mask variables. 261# 262jail_extract_address() 263{ 264 local _i _interface 265 _i=$1 266 _interface=$2 267 268 if [ -z "${_i}" ]; then 269 warn "jail_extract_address: called without input" 270 return 271 fi 272 273 # Check if we have an interface prefix given and split into 274 # iFace and rest. 275 case "${_i}" in 276 *\|*) # ifN|.. prefix there 277 _iface=${_i%%|*} 278 _r=${_i##*|} 279 ;; 280 *) _iface="" 281 _r=${_i} 282 ;; 283 esac 284 285 # In case the IP has no interface given, check if we have a global one. 286 _iface=${_iface:-${_interface}} 287 288 # Set address, cut off any prefix/netmask/prefixlen. 289 _addr=${_r} 290 _addr=${_addr%%[/ ]*} 291 292 # Theoretically we can return here if interface is not set, 293 # as we only care about the _mask if we call ifconfig. 294 # This is not done because we may want to santize IP addresses 295 # based on _type later, and optionally change the type as well. 296 297 # Extract the prefix/netmask/prefixlen part by cutting off the address. 298 _mask=${_r} 299 _mask=`expr "${_mask}" : "${_addr}\(.*\)"` 300 301 # Identify type {inet,inet6}. 302 case "${_addr}" in 303 *\.*\.*\.*) _type="inet" ;; 304 *:*) _type="inet6" ;; 305 *) warn "jail_extract_address: type not identified" 306 ;; 307 esac 308 309 # Handle the special /netmask instead of /prefix or 310 # "netmask xxx" case for legacy IP. 311 # We do NOT support shortend class-full netmasks. 312 if [ "${_type}" = "inet" ]; then 313 case "${_mask}" in 314 /*\.*\.*\.*) _mask=" netmask ${_mask#/}" ;; 315 *) ;; 316 esac 317 318 # In case _mask is still not set use /32. 319 _mask=${_mask:-/32} 320 321 elif [ "${_type}" = "inet6" ]; then 322 # In case _mask is not set for IPv6, use /128. 323 _mask=${_mask:-/128} 324 fi 325} 326 327# jail_handle_ips_option input iface 328# Handle a single argument imput which can be a comma separated 329# list of addresses (theoretically with an option interface and 330# prefix/netmask/prefixlen). 331# 332jail_handle_ips_option() 333{ 334 local _x _type _i _defif 335 _x=$1 336 _defif=$2 337 338 if [ -z "${_x}" ]; then 339 # No IP given. This can happen for the primary address 340 # of each address family. 341 return 342 fi 343 344 # Loop, in case we find a comma separated list, we need to handle 345 # each argument on its own. 346 while [ ${#_x} -gt 0 ]; do 347 case "${_x}" in 348 *,*) # Extract the first argument and strip it off the list. 349 _i=`expr "${_x}" : '^\([^,]*\)'` 350 _x=`expr "${_x}" : "^[^,]*,\(.*\)"` 351 ;; 352 *) _i=${_x} 353 _x="" 354 ;; 355 esac 356 357 _type="" 358 _addr="" 359 _mask="" 360 _iface="" 361 jail_extract_address $_i $_defif 362 363 # make sure we got an address. 364 case $_addr in 365 "") continue ;; 366 *) ;; 367 esac 368 369 # Append address to list of addresses for the jail command. 370 case $_type in 371 inet) 372 echo " ip4.addr += \"${_iface:+${_iface}|}${_addr}${_mask}\";" 373 ;; 374 inet6) 375 echo " ip6.addr += \"${_iface:+${_iface}|}${_addr}${_mask}\";" 376 need_dad_wait=1 377 ;; 378 esac 379 done 380} 381 382jail_config() 383{ 384 local _j 385 386 case $1 in 387 _ALL) return ;; 388 esac 389 for _j in $@; do 390 _j=$(echo $_j | tr /. _) 391 if parse_options $_j; then 392 echo "$_j: parameters are in $_conf." 393 fi 394 done 395} 396 397jail_console() 398{ 399 local _j _cmd 400 401 # One argument that is not _ALL. 402 case $#:$1 in 403 0:*|1:_ALL) err 3 "Specify a jail name." ;; 404 1:*) ;; 405 esac 406 _j=$(echo $1 | tr /. _) 407 shift 408 case $# in 409 0) eval _cmd=\${jail_${_j}_consolecmd:-$jail_consolecmd} ;; 410 *) _cmd=$@ ;; 411 esac 412 $jail_jexec $_j $_cmd 413} 414 415jail_status() 416{ 417 418 $jail_jls -N 419} 420 421jail_start() 422{ 423 local _j _jid _jn _jl 424 425 if [ $# = 0 ]; then 426 return 427 fi 428 echo -n 'Starting jails:' 429 case $1 in 430 _ALL) 431 command=$jail_program 432 rc_flags=$jail_flags 433 command_args="-f $jail_conf -c" 434 _tmp=`mktemp -t jail` || exit 3 435 if $command $rc_flags $command_args >> $_tmp 2>&1; then 436 $jail_jls -nq | while read IN; do 437 _jn=$(echo $IN | tr " " "\n" | grep ^name=) 438 _jid=$(echo $IN | tr " " "\n" | grep ^jid=) 439 echo -n " ${_jn#name=}" 440 echo "${_jid#jid=}" \ 441 > /var/run/jail_${_jn#name=}.id 442 done 443 else 444 tail -1 $_tmp 445 fi 446 rm -f $_tmp 447 echo '.' 448 return 449 ;; 450 esac 451 if checkyesno jail_parallel_start; then 452 # 453 # Start jails in parallel and then check jail id when 454 # jail_parallel_start is YES. 455 # 456 _jl= 457 for _j in $@; do 458 _j=$(echo $_j | tr /. _) 459 parse_options $_j || continue 460 461 _jl="$_jl $_j" 462 eval rc_flags=\${jail_${_j}_flags:-$jail_flags} 463 eval command=\${jail_${_j}_program:-$jail_program} 464 command_args="-i -f $_conf -c $_j" 465 $command $rc_flags $command_args \ 466 >/dev/null 2>&1 </dev/null & 467 done 468 sleep 1 469 for _j in $_jl; do 470 echo -n " ${_hostname:-${_j}}" 471 if _jid=$($jail_jls -n -j $_j | tr " " "\n" | \ 472 grep ^jid=); then 473 echo "${_jid#jid=}" > /var/run/jail_${_j}.id 474 else 475 rm -f /var/run/jail_${_j}.id 476 echo " cannot start jail " \ 477 "\"${_hostname:-${_j}}\": " 478 fi 479 done 480 else 481 # 482 # Start jails one-by-one when jail_parallel_start is NO. 483 # 484 for _j in $@; do 485 _j=$(echo $_j | tr /. _) 486 parse_options $_j || continue 487 488 eval rc_flags=\${jail_${_j}_flags:-$jail_flags} 489 eval command=\${jail_${_j}_program:-$jail_program} 490 command_args="-i -f $_conf -c $_j" 491 _tmp=`mktemp -t jail` || exit 3 492 if $command $rc_flags $command_args \ 493 >> $_tmp 2>&1 </dev/null; then 494 echo -n " ${_hostname:-${_j}}" 495 _jid=$($jail_jls -n -j $_j | \ 496 tr " " "\n" | grep ^jid=) 497 echo "${_jid#jid=}" > /var/run/jail_${_j}.id 498 else 499 rm -f /var/run/jail_${_j}.id 500 echo " cannot start jail " \ 501 "\"${_hostname:-${_j}}\": " 502 cat $_tmp 503 fi 504 rm -f $_tmp 505 done 506 fi 507 echo '.' 508} 509 510jail_stop() 511{ 512 local _j _jn 513 514 if [ $# = 0 ]; then 515 return 516 fi 517 echo -n 'Stopping jails:' 518 case $1 in 519 _ALL) 520 command=$jail_program 521 rc_flags=$jail_flags 522 command_args="-f $jail_conf -r" 523 $jail_jls -nq | while read IN; do 524 _jn=$(echo $IN | tr " " "\n" | grep ^name=) 525 echo -n " ${_jn#name=}" 526 _tmp=`mktemp -t jail` || exit 3 527 $command $rc_flags $command_args ${_jn#name=} \ 528 >> $_tmp 2>&1 529 if $jail_jls -j ${_jn#name=} > /dev/null 2>&1; then 530 tail -1 $_tmp 531 else 532 rm -f /var/run/jail_${_jn#name=}.id 533 fi 534 rm -f $_tmp 535 done 536 echo '.' 537 return 538 ;; 539 esac 540 for _j in $@; do 541 _j=$(echo $_j | tr /. _) 542 parse_options $_j || continue 543 if ! $jail_jls -j $_j > /dev/null 2>&1; then 544 continue 545 fi 546 eval command=\${jail_${_j}_program:-$jail_program} 547 echo -n " ${_hostname:-${_j}}" 548 _tmp=`mktemp -t jail` || exit 3 549 $command -q -f $_conf -r $_j >> $_tmp 2>&1 550 if $jail_jls -j $_j > /dev/null 2>&1; then 551 tail -1 $_tmp 552 else 553 rm -f /var/run/jail_${_j}.id 554 fi 555 rm -f $_tmp 556 done 557 echo '.' 558} 559 560jail_warn() 561{ 562 563 # To relieve confusion, show a warning message. 564 case $_confwarn in 565 1) warn "Per-jail configuration via jail_* variables " \ 566 "is obsolete. Please consider to migrate to $jail_conf." 567 ;; 568 esac 569} 570 571load_rc_config $name 572case $# in 5731) run_rc_command $@ ${jail_list:-_ALL} ;; 574*) run_rc_command $@ ;; 575esac 576