etc/rc.subr

   1 # $NetBSD: rc.subr,v 1.49 2002/05/21 12:31:01 lukem Exp $
   2 # $FreeBSD: src/etc/rc.subr,v 1.13 2003/06/09 17:31:06 mtm Exp $
   3 # $DragonFly: src/etc/rc.subr,v 1.15 2008/04/05 08:07:11 matthias Exp $
   4 #
   5 # Copyright (c) 1997-2002 The NetBSD Foundation, Inc.
   6 # All rights reserved.
   7 #
   8 # This code is derived from software contributed to The NetBSD Foundation
   9 # by Luke Mewburn.
  10 #
  11 # Redistribution and use in source and binary forms, with or without
  12 # modification, are permitted provided that the following conditions
  13 # are met:
  14 # 1. Redistributions of source code must retain the above copyright
  15 #    notice, this list of conditions and the following disclaimer.
  16 # 2. Redistributions in binary form must reproduce the above copyright
  17 #    notice, this list of conditions and the following disclaimer in the
  18 #    documentation and/or other materials provided with the distribution.
  19 # 3. All advertising materials mentioning features or use of this software
  20 #    must display the following acknowledgement:
  21 #        This product includes software developed by the NetBSD
  22 #        Foundation, Inc. and its contributors.
  23 # 4. Neither the name of The NetBSD Foundation nor the names of its
  24 #    contributors may be used to endorse or promote products derived
  25 #    from this software without specific prior written permission.
  26 #
  27 # THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  28 # ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  29 # TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  30 # PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  31 # BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  32 # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  33 # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  34 # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  35 # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  36 # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  37 # POSSIBILITY OF SUCH DAMAGE.
  38 #
  39 # rc.subr
  40 #       functions used by various rc scripts
  41 #
  42
  43 #
  44 #       Operating System dependent/independent variables
  45 #
  46
  47 if [ "X$_file" = "X" ]; then
  48     _file=$0
  49 fi
  50
  51 provide_list=`rcorder -p $_file`
  52
  53 SYSCTL="/sbin/sysctl"
  54 SYSCTL_N="${SYSCTL} -n"
  55 CMD_OSTYPE="${SYSCTL_N} kern.ostype"
  56 OSTYPE=`${CMD_OSTYPE}`
  57
  58 RC_RUNNING=0
  59 RC_FAILED=1
  60 RC_DISABLED=2
  61 RC_IRRELEVANT=3
  62 RC_CONFIGURED=4
  63 RC_STOPPED=5
  64 SYSCTL_W="${SYSCTL}"
  65
  66 #
  67 #       functions
  68 #       ---------
  69
  70 #
  71 # set_rcvar base_var
  72 #       Set the variable name enabling a specific service.
  73 #       FreeBSD uses ${service}_enable, while NetBSD uses
  74 #       just the name of the service. For example:
  75 #       FreeBSD: sendmail_enable="YES"
  76 #       NetBSD : sendmail="YES"
  77 #       $1 - if $name is not the base to work of off, specify
  78 #            a different one
  79 #
  80 set_rcvar()
  81 {
  82         if [ -z "$1" ]; then
  83                 base_var=${name}
  84         else
  85                 base_var="$1"
  86         fi
  87
  88         echo ${base_var}
  89 }
  90
  91 # set_provide_list
  92 #
  93 #       $1      should be $rc_arg (start, stop, restart, reload, etc)
  94 #       $2      return value $RC_*
  95 #
  96 #       Set the rcng_* variables associated with elements in provide_list
  97 #       based on $1 and $2.
  98 #
  99 #       Returns non-zero when early termination should occur, in which
 100 #       case the caller should return with a value of $? - 1
 101 #
 102 set_provide_list()
 103 {
 104     # Remember, plret is set to the early termination return code + 1,
 105     # or 0 if we want to continue the operation.
 106     #
 107     for i in $provide_list; do
 108         case $1$2 in
 109         start$RC_RUNNING|restart$RC_RUNNING)
 110             varsym -s rcng_$i=running
 111             ;;
 112         start$RC_FAILED|restart$RC_FAILED)
 113             varsym -s rcng_$i=failed
 114             ;;
 115         start$RC_DISABLED|restart$RC_DISABLED|reload$RC_DISABLED)
 116             varsym -s rcng_$i=disabled
 117             ;;
 118         start$RC_IRRELEVANT|restart$RC_IRRELEVANT|reload$RC_IRRELEVANT)
 119             varsym -s rcng_$i=irrelevant
 120             ;;
 121         start$RC_CONFIGURED|restart$RC_CONFIGURED)
 122             varsym -s rcng_$i=configured
 123             ;;
 124         stop$RC_DISABLED)
 125             varsym -s rcng_$i=disabled
 126             ;;
 127         stop$RC_IRRELEVANT)
 128             varsym -s rcng_$i=irrelevant
 129             ;;
 130         stop*)
 131             varsym -s rcng_$i=stopped
 132             ;;
 133         *)
 134             ;;
 135         esac
 136     done
 137 }
 138
 139 # check_early_term
 140 #       $1      should be $rc_arg (start, stop, restart, reload, etc)
 141 #       $2      return value $RC_*
 142 #       $3      $rc_force       "" not to force, "anything" to force.
 143 #
 144 # The return code is 0 if early termination is not to occur, non-zero if
 145 # it is to occur.  When early termination is to occur the caller should
 146 # return check_early_term()'s return code - 1.    That is, early termination
 147 # can occur with or without an error.
 148 #
 149 # The provide list will be adjusted when early termination occurs.
 150 #
 151 check_early_term()
 152 {
 153     case $2 in
 154     $RC_RUNNING)
 155         return 0
 156         ;;
 157     $RC_FAILED)
 158         set_provide_list $1 $2
 159         [ -z "$3" ] || return 0
 160         return 2
 161         ;;
 162     $RC_DISABLED)
 163         set_provide_list $1 $2
 164         [ -z "$3" ] || return 0
 165         return 1
 166         ;;
 167     $RC_IRRELEVANT)
 168         set_provide_list $1 $2
 169         [ -z "$3" ] || return 0
 170         return 1
 171         ;;
 172     $RC_CONFIGURED)
 173         return 0
 174         ;;
 175     $RC_STOPPED)
 176         return 0
 177         ;;
 178     esac
 179     set_provide_list $1 $2
 180     [ -z "$3" ] || return 0
 181     return 2
 182 }
 183
 184 # adjust_return_code $1
 185 #
 186 #       Convert the return code to an exit code of 0 (success) or 1 (failure)
 187 #
 188 adjust_return_code()
 189 {
 190     if [ $1 = $RC_FAILED ]; then
 191         return 1
 192     fi
 193     return 0
 194 }
 195
 196 #
 197 # force_depend script
 198 #       Force a service to start. Intended for use by services
 199 #       to resolve dependency issues. It is assumed the caller
 200 #       has check to make sure this call is necessary
 201 #       $1 - filename of script, in /etc/rc.d, to run
 202 #
 203 force_depend()
 204 {
 205         _depend="$1"
 206
 207         info "${name} depends on ${_depend}, which will be forced to start."
 208         if ! /etc/rc.d/${_depend} forcestart ; then
 209                 warn "Unable to force ${_depend}. It may already be running."
 210                 return 1
 211         fi
 212         return 0
 213 }
 214
 215 #
 216 # checkyesno var
 217 #       Test $1 variable, and warn if not set to YES or NO.
 218 #       Return 0 if it's "yes" (et al), nonzero otherwise.
 219 #
 220 checkyesno()
 221 {
 222         # try foo
 223         eval _value=\$${1%_enable}
 224         # try foo_enable
 225         if [ -z $_value ]
 226         then
 227                 eval _value=\$${1%_enable}_enable;
 228         fi
 229         debug "checkyesno: $1 is set to $_value."
 230         case $_value in
 231
 232                 #       "yes", "true", "on", or "1"
 233         [Yy][Ee][Ss]|[Tt][Rr][Uu][Ee]|[Oo][Nn]|1)
 234                 return 0
 235                 ;;
 236
 237                 #       "no", "false", "off", or "0"
 238         [Nn][Oo]|[Ff][Aa][Ll][Ss][Ee]|[Oo][Ff][Ff]|0)
 239                 return 1
 240                 ;;
 241         *)
 242                 warn "\$${1} is not set properly - see rc.conf(5)."
 243                 return 1
 244                 ;;
 245         esac
 246 }
 247
 248 # reverse_list list
 249 #       print the list in reverse order
 250 #
 251 reverse_list()
 252 {
 253         _revlist=
 254         for _revfile in $*; do
 255                 _revlist="$_revfile $_revlist"
 256         done
 257         echo $_revlist
 258 }
 259
 260 #
 261 # mount_critical_filesystems type
 262 #       Go through the list of critical filesystems as provided in
 263 #       the rc.conf(5) variable $critical_filesystems_${type}, checking
 264 #       each one to see if it is mounted, and if it is not, mounting it.
 265 #
 266 mount_critical_filesystems()
 267 {
 268         eval _fslist=\$critical_filesystems_${1}
 269         for _fs in $_fslist; do
 270                 mount | (
 271                         _ismounted=no
 272                         while read what _on on _type type; do
 273                                 if [ $on = $_fs ]; then
 274                                         _ismounted=yes
 275                                 fi
 276                         done
 277                         if [ $_ismounted = no ]; then
 278                                 mount $_fs >/dev/null 2>&1
 279                         fi
 280                 )
 281         done
 282 }
 283
 284 #
 285 # check_pidfile pidfile procname [interpreter]
 286 #       Parses the first line of pidfile for a PID, and ensures
 287 #       that the process is running and matches procname.
 288 #       Prints the matching PID upon success, nothing otherwise.
 289 #       interpreter is optional; see _find_processes() for details.
 290 #
 291 check_pidfile()
 292 {
 293         _pidfile=$1
 294         _procname=$2
 295         _interpreter=$3
 296         if [ -z "$_pidfile" -o -z "$_procname" ]; then
 297                 err 3 'USAGE: check_pidfile pidfile procname [interpreter]'
 298         fi
 299         if [ ! -f $_pidfile ]; then
 300                 debug "pid file {$_pidfile): not readable."
 301                 return
 302         fi
 303         read _pid _junk < $_pidfile
 304         if [ -z "$_pid" ]; then
 305                 debug "pid file {$_pidfile): no pid in file."
 306                 return
 307         fi
 308         _find_processes $_procname ${_interpreter:-.} '-p '"$_pid"
 309 }
 310
 311 #
 312 # check_process procname [interpreter]
 313 #       Ensures that a process (or processes) named procname is running.
 314 #       Prints a list of matching PIDs.
 315 #       interpreter is optional; see _find_processes() for details.
 316 #
 317 check_process()
 318 {
 319         _procname=$1
 320         _interpreter=$2
 321         if [ -z "$_procname" ]; then
 322                 err 3 'USAGE: check_process procname [interpreter]'
 323         fi
 324         _find_processes $_procname ${_interpreter:-.} '-ax'
 325 }
 326
 327 #
 328 # _find_processes procname interpreter psargs
 329 #       Search for procname in the output of ps generated by psargs.
 330 #       Prints the PIDs of any matching processes, space separated.
 331 #
 332 #       If interpreter == ".", check the following variations of procname
 333 #       against the first word of each command:
 334 #               procname
 335 #               `basename procname`
 336 #               `basename procname` + ":"
 337 #               "(" + `basename procname` + ")"
 338 #
 339 #       If interpreter != ".", read the first line of procname, remove the
 340 #       leading #!, normalise whitespace, append procname, and attempt to
 341 #       match that against each command, either as is, or with extra words
 342 #       at the end.
 343 #
 344 _find_processes()
 345 {
 346         if [ $# -ne 3 ]; then
 347                 err 3 'USAGE: _find_processes procname interpreter psargs'
 348         fi
 349         _procname=$1
 350         _interpreter=$2
 351         _psargs=$3
 352
 353         _pref=
 354         if [ $_interpreter != "." ]; then       # an interpreted script
 355                 read _interp < $_procname       # read interpreter name
 356                 _interp=${_interp#\#!}          # strip #!
 357                 set -- $_interp
 358                 if [ $_interpreter != $1 ]; then
 359                         warn "\$command_interpreter $_interpreter != $1"
 360                 fi
 361                 _interp="$* $_procname"         # cleanup spaces, add _procname
 362                 _interpbn="$1"                  # the interpreter binary
 363                 _fp_args='_argv'
 364                 _fp_match='case "$_argv" in
 365                     "${_interpbn##*/}: "$_procname*|${_interp}|"${_interp} "*)'
 366         else                                    # a normal daemon
 367                 _procnamebn=${_procname##*/}
 368                 _fp_args='_arg0 _argv'
 369                 _fp_match='case "$_arg0" in
 370                     $_procname|$_procnamebn|${_procnamebn}:|"(${_procnamebn})")'
 371         fi
 372
 373         _proccheck='
 374                 ps -o "pid,command" '"$_psargs"' |
 375                 while read _npid '"$_fp_args"'; do
 376                         case "$_npid" in
 377                             PID)
 378                                 continue ;;
 379                         esac ; '"$_fp_match"'
 380                                 echo -n "$_pref$_npid" ;
 381                                 _pref=" "
 382                                 ;;
 383                         esac
 384                 done'
 385
 386 #       debug "in _find_processes: proccheck is ($_proccheck)."
 387         eval $_proccheck
 388 }
 389
 390 #
 391 # wait_for_pids pid [pid ...]
 392 #       spins until none of the pids exist
 393 #
 394 wait_for_pids()
 395 {
 396         _list=$*
 397         if [ -z "$_list" ]; then
 398                 return
 399         fi
 400         _prefix=
 401         while true; do
 402                 _nlist="";
 403                 for _j in $_list; do
 404                         if kill -0 $_j 2>/dev/null; then
 405                                 _nlist="${_nlist}${_nlist:+ }$_j"
 406                         fi
 407                 done
 408                 if [ -z "$_nlist" ]; then
 409                         break
 410                 fi
 411                 _list=$_nlist
 412                 echo -n ${_prefix:-"Waiting for PIDS: "}$_list
 413                 _prefix=", "
 414                 sleep 2
 415         done
 416         if [ -n "$_prefix" ]; then
 417                 echo "."
 418         fi
 419 }
 420
 421 #
 422 # run_rc_command argument
 423 #       Search for argument in the list of supported commands, which is:
 424 #               "start stop restart rcvar status poll ${extra_commands}"
 425 #       If there's a match, run ${argument}_cmd or the default method
 426 #       (see below).
 427 #
 428 #       If argument has a given prefix, then change the operation as follows:
 429 #               Prefix  Operation
 430 #               ------  ---------
 431 #               fast    Skip the pid check, and set rc_fast=yes
 432 #               force   Set ${rcvar} to YES, and set rc_force=yes
 433 #
 434 #       The following globals are used:
 435 #
 436 #       Name            Needed  Purpose
 437 #       ----            ------  -------
 438 #       provide_list    (gen)   list of keywords provided by current rcng file
 439 #
 440 #       name            y       Name of script.
 441 #
 442 #       command         n       Full path to command.
 443 #                               Not needed if ${rc_arg}_cmd is set for
 444 #                               each keyword.
 445 #
 446 #       command_args    n       Optional args/shell directives for command.
 447 #
 448 #       command_interpreter n   If not empty, command is interpreted, so
 449 #                               call check_{pidfile,process}() appropriately.
 450 #
 451 #       extra_commands  n       List of extra commands supported.
 452 #
 453 #       pidfile         n       If set, use check_pidfile $pidfile $command,
 454 #                               otherwise use check_process $command.
 455 #                               In either case, only check if $command is set.
 456 #
 457 #       procname        n       Process name to check for instead of $command.
 458 #
 459 #       rcvar           n       This is checked with checkyesno to determine
 460 #                               if the action should be run.
 461 #
 462 #       ${name}_chroot  n       Directory to chroot to before running ${command}
 463 #                               Requires /usr to be mounted.
 464 #
 465 #       ${name}_chdir   n       Directory to cd to before running ${command}
 466 #                               (if not using ${name}_chroot).
 467 #
 468 #       ${name}_flags   n       Arguments to call ${command} with.
 469 #                               NOTE:   $flags from the parent environment
 470 #                                       can be used to override this.
 471 #
 472 #       ${name}_nice    n       Nice level to run ${command} at.
 473 #
 474 #       ${name}_user    n       User to run ${command} as, using su(1) if not
 475 #                               using ${name}_chroot.
 476 #                               Requires /usr to be mounted.
 477 #
 478 #       ${name}_group   n       Group to run chrooted ${command} as.
 479 #                               Requires /usr to be mounted.
 480 #
 481 #       ${name}_groups  n       Comma separated list of supplementary groups
 482 #                               to run the chrooted ${command} with.
 483 #                               Requires /usr to be mounted.
 484 #
 485 #       ${rc_arg}_cmd   n       If set, use this as the method when invoked;
 486 #                               Otherwise, use default command (see below)
 487 #
 488 #       ${rc_arg}_precmd n      If set, run just before performing the
 489 #                               ${rc_arg}_cmd method in the default
 490 #                               operation (i.e, after checking for required
 491 #                               bits and process (non)existence).
 492 #                               If this completes with a non-zero exit code,
 493 #                               don't run ${rc_arg}_cmd.
 494 #
 495 #       ${rc_arg}_postcmd n     If set, run just after performing the
 496 #                               ${rc_arg}_cmd method, if that method
 497 #                               returned a zero exit code.
 498 #
 499 #       required_dirs   n       If set, check for the existence of the given
 500 #                               directories before running the default
 501 #                               (re)start command.
 502 #
 503 #       required_files  n       If set, check for the readability of the given
 504 #                               files before running the default (re)start
 505 #                               command.
 506 #
 507 #       required_vars   n       If set, perform checkyesno on each of the
 508 #                               listed variables before running the default
 509 #                               (re)start command.
 510 #
 511 #       Default behaviour for a given argument, if no override method is
 512 #       provided:
 513 #
 514 #       Argument        Default behaviour
 515 #       --------        -----------------
 516 #       start           if !running && checkyesno ${rcvar}
 517 #                               ${command}
 518 #
 519 #       stop            if ${pidfile}
 520 #                               rc_pid=$(check_pidfile $pidfile $command)
 521 #                       else
 522 #                               rc_pid=$(check_process $command)
 523 #                       kill $sig_stop $rc_pid
 524 #                       wait_for_pids $rc_pid
 525 #                       ($sig_stop defaults to TERM.)
 526 #
 527 #       reload          Similar to stop, except use $sig_reload instead,
 528 #                       and doesn't wait_for_pids.
 529 #                       $sig_reload defaults to HUP.
 530 #
 531 #       restart         Run `stop' then `start'.
 532 #
 533 #       status          Show if ${command} is running, etc.
 534 #
 535 #       poll            Wait for ${command} to exit.
 536 #
 537 #       rcvar           Display what rc.conf variable is used (if any).
 538 #
 539 #       Variables available to methods, and after run_rc_command() has
 540 #       completed:
 541 #
 542 #       Variable        Purpose
 543 #       --------        -------
 544 #       rc_arg          Argument to command, after fast/force processing
 545 #                       performed
 546 #
 547 #       rc_flags        Flags to start the default command with.
 548 #                       Defaults to ${name}_flags, unless overridden
 549 #                       by $flags from the environment.
 550 #                       This variable may be changed by the precmd method.
 551 #
 552 #       rc_pid          PID of command (if appropriate)
 553 #
 554 #       rc_fast         Not empty if "fast" was provided (q.v.)
 555 #
 556 #       rc_force        Not empty if "force" was provided (q.v.)
 557 #
 558 #
 559 dummy_rc_command()
 560 {
 561         rc_arg=$1
 562
 563         case "$rc_arg" in
 564         fast*)                          # "fast" prefix; don't check pid
 565                 rc_arg=${rc_arg#fast}
 566                 ;;
 567         force*)                         # "force prefix; always start
 568                 rc_arg=${rc_arg#force}
 569                 ;;
 570         esac
 571         set_provide_list $rc_arg $RC_CONFIGURED
 572         return 0
 573 }
 574
 575 run_rc_command()
 576 {
 577         _return=0
 578         rc_arg=$1
 579         if [ -z "$name" ]; then
 580                 err 3 'run_rc_command: $name is not set.'
 581         fi
 582
 583         case "$rc_arg" in
 584         fast*)                          # "fast" prefix; don't check pid
 585                 rc_arg=${rc_arg#fast}
 586                 rc_fast=yes
 587                 ;;
 588         force*)                         # "force prefix; always start
 589                 rc_arg=${rc_arg#force}
 590                 rc_force=yes
 591                 if [ -n "${rcvar}" ]; then
 592                         eval ${rcvar}=YES
 593                 fi
 594                 ;;
 595         esac
 596
 597         eval _override_command=\$${name}_program
 598         if [ -n "$_override_command" ]; then
 599                 command=$_override_command
 600         fi
 601
 602         _keywords="start stop restart rcvar $extra_commands"
 603         rc_pid=
 604         _pidcmd=
 605         _procname=${procname:-${command}}
 606
 607                                         # setup pid check command if not fast
 608         if [ -z "$rc_fast" -a -n "$_procname" ]; then
 609                 if [ -n "$pidfile" ]; then
 610                         _pidcmd='rc_pid=$(check_pidfile '"$pidfile $_procname $command_interpreter"')'
 611                 else
 612                         _pidcmd='rc_pid=$(check_process '"$_procname $command_interpreter"')'
 613                 fi
 614                 if [ -n "$_pidcmd" ]; then
 615                         _keywords="${_keywords} status poll"
 616                 fi
 617         fi
 618
 619         if [ -z "$rc_arg" ]; then
 620                 rc_usage "$_keywords"
 621         fi
 622
 623         if [ -n "$flags" ]; then        # allow override from environment
 624                 rc_flags=$flags
 625         else
 626                 eval rc_flags=\$${name}_flags
 627         fi
 628         eval _chdir=\$${name}_chdir     _chroot=\$${name}_chroot \
 629             _nice=\$${name}_nice        _user=\$${name}_user \
 630             _group=\$${name}_group      _groups=\$${name}_groups
 631
 632         if [ -n "$_user" ]; then        # unset $_user if running as that user
 633                 if [ "$_user" = "$(id -un)" ]; then
 634                         unset _user
 635                 fi
 636         fi
 637
 638                                         # if ${rcvar} is set, and $1 is not
 639                                         # "rcvar", then run
 640                                         #       checkyesno ${rcvar}
 641                                         # and return if that failed
 642                                         #
 643         if [ -n "${rcvar}" -a "$rc_arg" != "rcvar" ]; then
 644                 if ! checkyesno ${rcvar}; then
 645                         set_provide_list $rc_arg $RC_DISABLED
 646                         return 0
 647                 fi
 648         fi
 649
 650         eval $_pidcmd                   # determine the pid if necessary
 651
 652         for _elem in $_keywords; do
 653                 if [ "$_elem" != "$rc_arg" ]; then
 654                         continue
 655                 fi
 656
 657                                         # if there's a custom ${XXX_cmd},
 658                                         # run that instead of the default
 659                                         #
 660                 eval _cmd=\$${rc_arg}_cmd _precmd=\$${rc_arg}_precmd \
 661                     _postcmd=\$${rc_arg}_postcmd
 662                 if [ -n "$_cmd" ]; then
 663                                         # if the precmd failed and force
 664                                         # isn't set, exit
 665                                         #
 666                         if [ -n "$_precmd" ]; then
 667                                 debug "run_rc_command: evaluating ${_precmd}()."
 668                                 eval $_precmd
 669
 670                                 _return=$?
 671                                 check_early_term $rc_arg $_return "$rc_force" || return $(($?-1))
 672                         fi
 673
 674                         if [ -n "$_cmd" ]; then
 675                                 debug "run_rc_command: evaluating ${_cmd}()."
 676                                 eval $_cmd
 677                                 _return=$?
 678                                 check_early_term $rc_arg $_return "$rc_force" || return $(($?-1))
 679                         fi
 680
 681                         if [ -n "$_postcmd" ]; then
 682                                 debug "run_rc_command: evaluating ${_postcmd}()."
 683                                 eval $_postcmd
 684                                 _return=$?
 685                                 check_early_term $rc_arg $_return "" || return $(($?-1))
 686                         fi
 687                         set_provide_list $rc_arg $_return
 688                         adjust_return_code $_return
 689                         return $?
 690                 fi
 691
 692                 case "$rc_arg" in       # default operations...
 693
 694                 status)
 695                         if [ -n "$rc_pid" ]; then
 696                                 echo "${name} is running as pid $rc_pid."
 697                         else
 698                                 echo "${name} is not running."
 699                                 return 1
 700                         fi
 701                         ;;
 702
 703                 start)
 704                         if [ -n "$rc_pid" ]; then
 705                                 echo "${name} already running? (pid=$rc_pid)."
 706                                 exit 1
 707                         fi
 708
 709                         if [ ! -x $command ]; then
 710                                 info "run_rc_command: cannot run ($command)."
 711                                 set_provide_list $rc_arg $RC_FAILED
 712                                 adjust_return_code $RC_FAILED
 713                                 return $?
 714                         fi
 715
 716                                         # check for required variables,
 717                                         # directories, and files
 718                                         #
 719                         for _f in $required_vars; do
 720                                 if ! checkyesno $_f; then
 721                                         warn "\$${_f} is not set."
 722                                         if [ -z "$rc_force" ]; then
 723                                                 set_provide_list $rc_arg $RC_FAILED
 724                                                 adjust_return_code $RC_FAILED
 725                                                 return $?
 726                                         fi
 727                                 fi
 728                         done
 729                         for _f in $required_dirs; do
 730                                 if [ ! -d "${_f}/." ]; then
 731                                         warn "${_f} is not a directory."
 732                                         if [ -z "$rc_force" ]; then
 733                                                 set_provide_list $rc_arg $RC_FAILED
 734                                                 adjust_return_code $RC_FAILED
 735                                                 return $?
 736                                         fi
 737                                 fi
 738                         done
 739                         for _f in $required_files; do
 740                                 if [ ! -r "${_f}" ]; then
 741                                         warn "${_f} is not readable."
 742                                         if [ -z "$rc_force" ]; then
 743                                                 set_provide_list $rc_arg $RC_FAILED
 744                                                 adjust_return_code $RC_FAILED
 745                                                 return $?
 746                                         fi
 747                                 fi
 748                         done
 749
 750                                         # if the precmd failed and force
 751                                         # isn't set, exit
 752                                         #
 753                         if [ -n "${_precmd}" ]; then
 754                                 debug "run_rc_command: evaluating ${_precmd}()."
 755                                 eval $_precmd
 756                                 _return=$?
 757                                 check_early_term $rc_arg $_return "$rc_force" || return $(($?-1))
 758                         fi
 759
 760                                         # setup the command to run, and run it
 761                                         #
 762                         echo "Starting ${name}."
 763                         if [ -n "$_chroot" ]; then
 764                                 _doit="\
 765 ${_nice:+nice -n $_nice }\
 766 chroot ${_user:+-u $_user }${_group:+-g $_group }${_groups:+-G $_groups }\
 767 $_chroot $command $rc_flags $command_args"
 768                         else
 769                                 _doit="\
 770 ${_chdir:+cd $_chdir; }\
 771 ${_nice:+nice -n $_nice }\
 772 $command $rc_flags $command_args"
 773                                 if [ -n "$_user" ]; then
 774                                     _doit="su -m $_user -c 'sh -c \"$_doit\"'"
 775                                 fi
 776                         fi
 777
 778                                         # if the cmd failed and force
 779                                         # isn't set, exit
 780                                         #
 781                         debug "run_rc_command: _doit: $_doit"
 782                         eval $_doit
 783                         _return=$?
 784                         check_early_term $rc_arg $_return "$rc_force" || return $(($?-1))
 785                                         # finally, run postcmd
 786                                         #
 787                         if [ -n "${_postcmd}" ]; then
 788                                 debug "run_rc_command: evaluating ${_postcmd}()."
 789                                 eval $_postcmd
 790                         fi
 791                         ;;
 792
 793                 stop)
 794                         if [ -z "$rc_pid" ]; then
 795                                 if [ -n "$pidfile" ]; then
 796                                         echo \
 797                                     "${name} not running? (check $pidfile)."
 798                                 else
 799                                         echo "${name} not running?"
 800                                 fi
 801                                 set_provide_list $rc_arg $RC_STOPPED
 802                                 exit 1
 803                         fi
 804
 805                                         # if the precmd failed and force
 806                                         # isn't set, exit
 807                                         #
 808                         if [ -n "$_precmd" ]; then
 809                                 eval $_precmd
 810                                 _return=$?
 811                                 check_early_term $rc_arg $_return "$rc_force" || return $(($?-1))
 812                         fi
 813
 814                                         # send the signal to stop
 815                                         #
 816                         echo "Stopping ${name}."
 817                         _doit="kill -${sig_stop:-TERM} $rc_pid"
 818                         if [ -n "$_user" ]; then
 819                                 _doit="su -m $_user -c 'sh -c \"$_doit\"'"
 820                         fi
 821
 822                                         # if the stop cmd failed and force
 823                                         # isn't set, exit
 824                                         #
 825                         eval $_doit
 826                         _return=$?
 827                         check_early_term $rc_arg $_return "$rc_force" || return $(($?-1))
 828                                         # wait for the command to exit,
 829                                         # and run postcmd.
 830                         sleep 0.1
 831                         wait_for_pids $rc_pid
 832                         if [ -n "$_postcmd" ]; then
 833                                 eval $_postcmd
 834                                 _return=$?
 835                         fi
 836                         ;;
 837
 838                 reload)
 839                         if [ -z "$rc_pid" ]; then
 840                                 if [ -n "$pidfile" ]; then
 841                                         echo \
 842                                     "${name} not running? (check $pidfile)."
 843                                 else
 844                                         echo "${name} not running?"
 845                                 fi
 846                                 set_provide_list $rc_arg $RC_FAILED
 847                                 exit 1
 848                         fi
 849                         echo "Reloading ${name} config files."
 850                         if [ -n "$_precmd" ]; then
 851                                 eval $_precmd
 852                                 _return=$?
 853                                 check_early_term $rc_arg $_return "$rc_force" || return $(($?-1))
 854                         fi
 855                         _doit="kill -${sig_reload:-HUP} $rc_pid"
 856                         if [ -n "$_user" ]; then
 857                                 _doit="su -m $_user -c 'sh -c \"$_doit\"'"
 858                         fi
 859                         eval $_doit
 860                         _return=$?
 861                         check_early_term $rc_arg $_return "$rc_force" || return $(($?-1))
 862                         if [ -n "$_postcmd" ]; then
 863                                 eval $_postcmd
 864                                 _return=$?
 865                         fi
 866                         ;;
 867
 868                 restart)
 869                         if [ -n "$_precmd" ]; then
 870                                 eval $_precmd
 871                                 _return=$?
 872                                 check_early_term $rc_arg $_return "$rc_force" || return $(($?-1))
 873                         fi
 874                                         # prevent restart being called more
 875                                         # than once by any given script
 876                                         #
 877                         if [ -n "$_rc_restart_done" ]; then
 878                                 return 0
 879                         fi
 880                         _rc_restart_done=YES
 881
 882                         ( $0 ${rc_force:+force}stop )
 883                         $0 ${rc_force:+force}start
 884                         _return=$?
 885
 886                         if [ -n "$_postcmd" ]; then
 887                                 eval $_postcmd
 888                                 adjust_return_code $?
 889                                 _return=$?
 890                         fi
 891                         # Do not set_provide_list(), the start command above
 892                         # will have done it for us and we do not know the
 893                         # actual RC code to base a setting on here.
 894                         #
 895                         return $_return
 896                         ;;
 897
 898                 poll)
 899                         if [ -n "$rc_pid" ]; then
 900                                 wait_for_pids $rc_pid
 901                         fi
 902                         ;;
 903
 904                 rcvar)
 905                         echo "# $name"
 906                         if [ -n "$rcvar" ]; then
 907                                 if checkyesno ${rcvar}; then
 908                                         echo "\$${rcvar}=YES"
 909                                 else
 910                                         echo "\$${rcvar}=NO"
 911                                 fi
 912                         fi
 913                         ;;
 914
 915                 *)
 916                         rc_usage "$_keywords"
 917                         ;;
 918
 919                 esac
 920                 set_provide_list $rc_arg $_return
 921                 adjust_return_code $_return
 922                 return $?
 923         done
 924
 925         echo 1>&2 "$0: unknown directive '$rc_arg'."
 926         rc_usage "$_keywords"
 927         exit 1
 928 }
 929
 930 #
 931 # run_rc_script file arg
 932 #       Start the script `file' with `arg', and correctly handle the
 933 #       return value from the script.  If `file' ends with `.sh', it's
 934 #       sourced into the current environment.  If `file' appears to be
 935 #       a backup or scratch file, ignore it.  Otherwise if it's
 936 #       executable run as a child process.
 937 #
 938 run_rc_script()
 939 {
 940         _file=$1
 941         _arg=$2
 942         if [ -z "$_file" -o -z "$_arg" ]; then
 943                 err 3 'USAGE: run_rc_script file arg'
 944         fi
 945
 946         trap "echo 'Reboot interrupted'; exit 1" 3
 947
 948         unset   name command command_args command_interpreter \
 949                 extra_commands pidfile procname \
 950                 rcvar required_dirs required_files required_vars
 951         eval unset ${_arg}_cmd ${_arg}_precmd ${_arg}_postcmd
 952
 953         case "$_file" in
 954         *.sh)                           # run in current shell
 955                 set $_arg ; . $_file
 956                 ;;
 957         *[~#]|*.OLD|*.orig)             # scratch file; skip
 958                 warn "Ignoring scratch file $_file"
 959                 ;;
 960         *)                              # run in subshell
 961                 if [ -x $_file ]; then
 962                         if [ -n "$rc_fast_and_loose" ]; then
 963                                 set $_arg ; . $_file
 964                         else
 965                                 ( trap "echo 'Reboot interrupted'; exit 1" 3
 966                                   set $_arg ; . $_file )
 967                         fi
 968                 fi
 969                 ;;
 970         esac
 971 }
 972
 973 # ltr str src dst
 974 #       Change every $src in $str to $dst.
 975 #       Useful when /usr is not yet mounted and we cannot use tr(1), sed(1) nor
 976 #       awk(1).
 977 ltr()
 978 {
 979         local _str _src _dst _out _com
 980         _str=$1
 981         _src=$2
 982         _dst=$3
 983         _out=""
 984
 985         IFS=${_src}
 986         for _com in ${_str}; do
 987                 if [ -z "${_out}" ]; then
 988                         _out="${_com}"
 989                 else
 990                         _out="${_out}${_dst}${_com}"
 991                 fi
 992         done
 993         echo "${_out}"
 994 }
 995
 996 #
 997 # load_rc_config
 998 #       Source in the configuration file for a given command.
 999 #
1000 load_rc_config()
1001 {
1002         _command=$1
1003         if [ -z "$_command" ]; then
1004                 err 3 'USAGE: load_rc_config command'
1005         fi
1006
1007         if [ -z "$_rc_conf_loaded" ]; then
1008                 if [ -r /etc/defaults/rc.conf ]; then
1009                         debug "Sourcing /etc/defaults/rc.conf"
1010                         . /etc/defaults/rc.conf
1011                         source_rc_confs
1012                 elif [ -r /etc/rc.conf ]; then
1013                         debug "Sourcing /etc/rc.conf (/etc/defaults/rc.conf doesn't exist)."
1014                         . /etc/rc.conf
1015                 fi
1016                 _rc_conf_loaded=YES
1017         fi
1018         if [ -f /etc/rc.conf.d/"$_command" ]; then
1019                 debug "Sourcing /etc/rc.conf.d/${_command}"
1020                 . /etc/rc.conf.d/"$_command"
1021         fi
1022
1023         # XXX - Deprecated variable name support
1024         #
1025                 [ -n "$portmap_enable" ] && rpcbind_enable="$portmap_enable"
1026                 [ -n "$portmap_program" ] && rpcbind_program="$portmap_program"
1027                 [ -n "$portmap_flags" ] && rpcbind_flags="$portmap_flags"
1028                 [ -n "$single_mountd_enable" ] && mountd_enable="$single_mountd_enable"
1029                 [ -n "$dhcp_program" ] && dhclient_program="$dhcp_program"
1030                 [ -n "$dhcp_flags" ] && dhclient_flags="$dhcp_flags"
1031
1032 }
1033
1034 #
1035 # rc_usage commands
1036 #       Print a usage string for $0, with `commands' being a list of
1037 #       valid commands.
1038 #
1039 rc_usage()
1040 {
1041         echo -n 1>&2 "Usage: $0 [fast|force]("
1042
1043         _sep=
1044         for _elem in $*; do
1045                 echo -n 1>&2 "$_sep$_elem"
1046                 _sep="|"
1047         done
1048         echo 1>&2 ")"
1049         exit 1
1050 }
1051
1052 #
1053 # err exitval message
1054 #       Display message to stderr and log to the syslog, and exit with exitval.
1055 #
1056 err()
1057 {
1058         exitval=$1
1059         shift
1060
1061         if [ -x /usr/bin/logger ]; then
1062                 logger "$0: ERROR: $*"
1063         fi
1064         echo 1>&2 "$0: ERROR: $*"
1065         exit $exitval
1066 }
1067
1068 #
1069 # warn message
1070 #       Display message to stderr and log to the syslog.
1071 #
1072 warn()
1073 {
1074         if [ -x /usr/bin/logger ]; then
1075                 logger "$0: WARNING: $*"
1076         fi
1077         echo 1>&2 "$0: WARNING: $*"
1078 }
1079
1080 #
1081 # info message
1082 #       Display informational message to stdout and log to syslog.
1083 #
1084 info()
1085 {
1086         case ${rc_info} in
1087         [Yy][Ee][Ss]|[Tt][Rr][Uu][Ee]|[Oo][Nn]|1)
1088                 if [ -x /usr/bin/logger ]; then
1089                         logger "$0: INFO: $*"
1090                 fi
1091                 echo "$0: INFO: $*"
1092                 ;;
1093         esac
1094 }
1095
1096 #
1097 # debug message
1098 #       If debugging is enabled in rc.conf output message to stderr.
1099 #       BEWARE that you don't call any subroutine that itself calls this
1100 #       function.
1101 #
1102 debug()
1103 {
1104         case ${rc_debug} in
1105         [Yy][Ee][Ss]|[Tt][Rr][Uu][Ee]|[Oo][Nn]|1)
1106                 if [ -x /usr/bin/logger ]; then
1107                         logger "$0: INFO: $*"
1108                 fi
1109                 echo 1>&2 "$0: DEBUG: $*"
1110                 ;;
1111         esac
1112 }
1113
1114 #
1115 # backup_file action file cur backup
1116 #       Make a backup copy of `file' into `cur', and save the previous
1117 #       version of `cur' as `backup' or use rcs for archiving.
1118 #
1119 #       This routine checks the value of the backup_uses_rcs variable,
1120 #       which can be either YES or NO.
1121 #
1122 #       The `action' keyword can be one of the following:
1123 #
1124 #       add             `file' is now being backed up (and is possibly
1125 #                       being reentered into the backups system).  `cur'
1126 #                       is created and RCS files, if necessary, are
1127 #                       created as well.
1128 #
1129 #       update          `file' has changed and needs to be backed up.
1130 #                       If `cur' exists, it is copied to to `back' or
1131 #                       checked into RCS (if the repository file is old),
1132 #                       and then `file' is copied to `cur'.  Another RCS
1133 #                       check in done here if RCS is being used.
1134 #
1135 #       remove          `file' is no longer being tracked by the backups
1136 #                       system.  If RCS is not being used, `cur' is moved
1137 #                       to `back', otherwise an empty file is checked in,
1138 #                       and then `cur' is removed.
1139 #
1140 #
1141 backup_file()
1142 {
1143         _action=$1
1144         _cpfile=$2
1145         _cur=$3
1146         _back=$4
1147
1148         if checkyesno backup_uses_rcs; then
1149                 _msg0="backup archive"
1150                 _msg1="update"
1151
1152                 # ensure that history file is not locked
1153                 if [ -f $_cur,v ]; then
1154                         rcs -q -u -U -M $_cur
1155                 fi
1156
1157                 # ensure after switching to rcs that the
1158                 # current backup is not lost
1159                 if [ -f $_cur ]; then
1160                         # no archive, or current newer than archive
1161                         if [ ! -f $_cur,v -o $_cur -nt $_cur,v ]; then
1162                                 ci -q -f -u -t-"$_msg0" -m"$_msg1" $_cur
1163                                 rcs -q -kb -U $_cur
1164                                 co -q -f -u $_cur
1165                         fi
1166                 fi
1167
1168                 case $_action in
1169                 add|update)
1170                         cp -p $_cpfile $_cur
1171                         ci -q -f -u -t-"$_msg0" -m"$_msg1" $_cur
1172                         rcs -q -kb -U $_cur
1173                         co -q -f -u $_cur
1174                         chown root:wheel $_cur $_cur,v
1175                         ;;
1176                 remove)
1177                         cp /dev/null $_cur
1178                         ci -q -f -u -t-"$_msg0" -m"$_msg1" $_cur
1179                         rcs -q -kb -U $_cur
1180                         chown root:wheel $_cur $_cur,v
1181                         rm $_cur
1182                         ;;
1183                 esac
1184         else
1185                 case $_action in
1186                 add|update)
1187                         if [ -f $_cur ]; then
1188                                 cp -p $_cur $_back
1189                         fi
1190                         cp -p $_cpfile $_cur
1191                         chown root:wheel $_cur
1192                         ;;
1193                 remove)
1194                         mv -f $_cur $_back
1195                         ;;
1196                 esac
1197         fi
1198 }
1199
1200 # devfs_mount_jail dir
1201 # Mounts a devfs file system appropriate for jails
1202 # on the directory dir.
1203 # This function returns non-zero if an error occurs.
1204 #
1205 devfs_mount_jail()
1206 {
1207         local jdev _me
1208         jdev="$1"
1209         _me="devfs_mount_jail"
1210
1211         if ! devfs_domount "$jdev" $rs; then
1212                 warn "$_me: devfs was not mounted on $jdev"
1213                 return 1
1214         fi
1215         return 0
1216 }
1217
1218 # devfs_domount dir
1219 # Mount devfs on dir.
1220 # Returns 0 on success.
1221 #
1222 devfs_domount()
1223 {
1224         local devdir _me
1225         devdir="$1"
1226         _me="devfs_domount()"
1227
1228         if [ -z "$devdir" ]; then
1229                 warn "$_me: you must specify a mount-point"
1230                 return 1
1231         fi
1232
1233         debug "$_me: mount-point is ($devdir)"
1234         if ! mount -t devfs devfs "$devdir"; then
1235                 warn "$_me: Unable to mount devfs on $devdir"
1236                 return 1
1237         fi
1238
1239 return 0
1240 }