etc/rc.subr

   1 # $NetBSD: rc.subr,v 1.67 2006/10/07 11:25:15 elad Exp $
   2 # $FreeBSD$
   3 #
   4 # Copyright (c) 1997-2004 The NetBSD Foundation, Inc.
   5 # All rights reserved.
   6 #
   7 # This code is derived from software contributed to The NetBSD Foundation
   8 # by Luke Mewburn.
   9 #
  10 # Redistribution and use in source and binary forms, with or without
  11 # modification, are permitted provided that the following conditions
  12 # are met:
  13 # 1. Redistributions of source code must retain the above copyright
  14 #    notice, this list of conditions and the following disclaimer.
  15 # 2. Redistributions in binary form must reproduce the above copyright
  16 #    notice, this list of conditions and the following disclaimer in the
  17 #    documentation and/or other materials provided with the distribution.
  18 #
  19 # THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20 # ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21 # TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22 # PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23 # BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24 # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25 # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26 # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27 # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28 # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29 # POSSIBILITY OF SUCH DAMAGE.
  30 #
  31 # rc.subr
  32 #       functions used by various rc scripts
  33 #
  34
  35 : ${RC_PID:=$$}; export RC_PID
  36
  37 #
  38 #       Operating System dependent/independent variables
  39 #
  40
  41 if [ -z "${_rc_subr_loaded}" ]; then
  42
  43 _rc_subr_loaded="YES"
  44
  45 SYSCTL="/sbin/sysctl"
  46 SYSCTL_N="${SYSCTL} -n"
  47 SYSCTL_W="${SYSCTL}"
  48 ID="/usr/bin/id"
  49 IDCMD="if [ -x $ID ]; then $ID -un; fi"
  50 PS="/bin/ps -ww"
  51 JID=`$PS -p $$ -o jid=`
  52
  53 #
  54 #       functions
  55 #       ---------
  56
  57 # list_vars pattern
  58 #       List vars matching pattern.
  59 #
  60 list_vars()
  61 {
  62         set | { while read LINE; do
  63                 var="${LINE%%=*}"
  64                 case "$var" in
  65                 "$LINE"|*[!a-zA-Z0-9_]*) continue ;;
  66                 $1) echo $var
  67                 esac
  68         done; }
  69 }
  70
  71 # set_rcvar [var] [defval] [desc]
  72 #
  73 #       Echo or define a rc.conf(5) variable name.  Global variable
  74 #       $rcvars is used.
  75 #
  76 #       If no argument is specified, echo "${name}_enable".
  77 #
  78 #       If only a var is specified, echo "${var}_enable".
  79 #
  80 #       If var and defval are specified, the ${var} is defined as
  81 #       rc.conf(5) variable and the default value is ${defvar}.  An
  82 #       optional argument $desc can also be specified to add a
  83 #       description for that.
  84 #
  85 set_rcvar()
  86 {
  87         local _var
  88
  89         case $# in
  90         0)      echo ${name}_enable ;;
  91         1)      echo ${1}_enable ;;
  92         *)
  93                 debug "set_rcvar: \$$1=$2 is added" \
  94                     " as a rc.conf(5) variable."
  95                 _var=$1
  96                 rcvars="${rcvars# } $_var"
  97                 eval ${_var}_defval=\"$2\"
  98                 shift 2
  99                 eval ${_var}_desc=\"$*\"
 100         ;;
 101         esac
 102 }
 103
 104 # set_rcvar_obsolete oldvar [newvar] [msg]
 105 #       Define obsolete variable.
 106 #       Global variable $rcvars_obsolete is used.
 107 #
 108 set_rcvar_obsolete()
 109 {
 110         local _var
 111         _var=$1
 112         debug "set_rcvar_obsolete: \$$1(old) -> \$$2(new) is defined"
 113
 114         rcvars_obsolete="${rcvars_obsolete# } $1"
 115         eval ${1}_newvar=\"$2\"
 116         shift 2
 117         eval ${_var}_obsolete_msg=\"$*\"
 118 }
 119
 120 #
 121 # force_depend script [rcvar]
 122 #       Force a service to start. Intended for use by services
 123 #       to resolve dependency issues.
 124 #       $1 - filename of script, in /etc/rc.d, to run
 125 #       $2 - name of the script's rcvar (minus the _enable)
 126 #
 127 force_depend()
 128 {
 129         local _depend _dep_rcvar
 130
 131         _depend="$1"
 132         _dep_rcvar="${2:-$1}_enable"
 133
 134         [ -n "$rc_fast" ] && ! checkyesno always_force_depends &&
 135             checkyesno $_dep_rcvar && return 0
 136
 137         /etc/rc.d/${_depend} forcestatus >/dev/null 2>&1 && return 0
 138
 139         info "${name} depends on ${_depend}, which will be forced to start."
 140         if ! /etc/rc.d/${_depend} forcestart; then
 141                 warn "Unable to force ${_depend}. It may already be running."
 142                 return 1
 143         fi
 144 }
 145
 146 #
 147 # checkyesno var
 148 #       Test $1 variable, and warn if not set to YES or NO.
 149 #       Return 0 if it's "yes" (et al), nonzero otherwise.
 150 #
 151 checkyesno()
 152 {
 153         eval _value=\$${1}
 154         debug "checkyesno: $1 is set to $_value."
 155         case $_value in
 156
 157                 #       "yes", "true", "on", or "1"
 158         [Yy][Ee][Ss]|[Tt][Rr][Uu][Ee]|[Oo][Nn]|1)
 159                 return 0
 160                 ;;
 161
 162                 #       "no", "false", "off", or "0"
 163         [Nn][Oo]|[Ff][Aa][Ll][Ss][Ee]|[Oo][Ff][Ff]|0)
 164                 return 1
 165                 ;;
 166         *)
 167                 warn "\$${1} is not set properly - see rc.conf(5)."
 168                 return 1
 169                 ;;
 170         esac
 171 }
 172
 173 #
 174 # reverse_list list
 175 #       print the list in reverse order
 176 #
 177 reverse_list()
 178 {
 179         _revlist=
 180         for _revfile; do
 181                 _revlist="$_revfile $_revlist"
 182         done
 183         echo $_revlist
 184 }
 185
 186 # stop_boot always
 187 #       If booting directly to multiuser or $always is enabled,
 188 #       send SIGTERM to the parent (/etc/rc) to abort the boot.
 189 #       Otherwise just exit.
 190 #
 191 stop_boot()
 192 {
 193         local always
 194
 195         case $1 in
 196                 #       "yes", "true", "on", or "1"
 197         [Yy][Ee][Ss]|[Tt][Rr][Uu][Ee]|[Oo][Nn]|1)
 198                 always=true
 199                 ;;
 200         *)
 201                 always=false
 202                 ;;
 203         esac
 204         if [ "$autoboot" = yes -o "$always" = true ]; then
 205                 echo "ERROR: ABORTING BOOT (sending SIGTERM to parent)!"
 206                 kill -TERM ${RC_PID}
 207         fi
 208         exit 1
 209 }
 210
 211 #
 212 # mount_critical_filesystems type
 213 #       Go through the list of critical filesystems as provided in
 214 #       the rc.conf(5) variable $critical_filesystems_${type}, checking
 215 #       each one to see if it is mounted, and if it is not, mounting it.
 216 #
 217 mount_critical_filesystems()
 218 {
 219         eval _fslist=\$critical_filesystems_${1}
 220         for _fs in $_fslist; do
 221                 mount | (
 222                         _ismounted=false
 223                         while read what _on on _type type; do
 224                                 if [ $on = $_fs ]; then
 225                                         _ismounted=true
 226                                 fi
 227                         done
 228                         if $_ismounted; then
 229                                 :
 230                         else
 231                                 mount $_fs >/dev/null 2>&1
 232                         fi
 233                 )
 234         done
 235 }
 236
 237 #
 238 # check_pidfile pidfile procname [interpreter]
 239 #       Parses the first line of pidfile for a PID, and ensures
 240 #       that the process is running and matches procname.
 241 #       Prints the matching PID upon success, nothing otherwise.
 242 #       interpreter is optional; see _find_processes() for details.
 243 #
 244 check_pidfile()
 245 {
 246         _pidfile=$1
 247         _procname=$2
 248         _interpreter=$3
 249         if [ -z "$_pidfile" -o -z "$_procname" ]; then
 250                 err 3 'USAGE: check_pidfile pidfile procname [interpreter]'
 251         fi
 252         if [ ! -f $_pidfile ]; then
 253                 debug "pid file ($_pidfile): not readable."
 254                 return
 255         fi
 256         read _pid _junk < $_pidfile
 257         if [ -z "$_pid" ]; then
 258                 debug "pid file ($_pidfile): no pid in file."
 259                 return
 260         fi
 261         _find_processes $_procname ${_interpreter:-.} '-p '"$_pid"
 262 }
 263
 264 #
 265 # check_process procname [interpreter]
 266 #       Ensures that a process (or processes) named procname is running.
 267 #       Prints a list of matching PIDs.
 268 #       interpreter is optional; see _find_processes() for details.
 269 #
 270 check_process()
 271 {
 272         _procname=$1
 273         _interpreter=$2
 274         if [ -z "$_procname" ]; then
 275                 err 3 'USAGE: check_process procname [interpreter]'
 276         fi
 277         _find_processes $_procname ${_interpreter:-.} '-ax'
 278 }
 279
 280 #
 281 # _find_processes procname interpreter psargs
 282 #       Search for procname in the output of ps generated by psargs.
 283 #       Prints the PIDs of any matching processes, space separated.
 284 #
 285 #       If interpreter == ".", check the following variations of procname
 286 #       against the first word of each command:
 287 #               procname
 288 #               `basename procname`
 289 #               `basename procname` + ":"
 290 #               "(" + `basename procname` + ")"
 291 #               "[" + `basename procname` + "]"
 292 #
 293 #       If interpreter != ".", read the first line of procname, remove the
 294 #       leading #!, normalise whitespace, append procname, and attempt to
 295 #       match that against each command, either as is, or with extra words
 296 #       at the end.  As an alternative, to deal with interpreted daemons
 297 #       using perl, the basename of the interpreter plus a colon is also
 298 #       tried as the prefix to procname.
 299 #
 300 _find_processes()
 301 {
 302         if [ $# -ne 3 ]; then
 303                 err 3 'USAGE: _find_processes procname interpreter psargs'
 304         fi
 305         _procname=$1
 306         _interpreter=$2
 307         _psargs=$3
 308
 309         _pref=
 310         if [ $_interpreter != "." ]; then       # an interpreted script
 311                 _script="${_chroot}${_chroot:+/}$_procname"
 312                 if [ -r "$_script" ]; then
 313                         read _interp < $_script # read interpreter name
 314                         case "$_interp" in
 315                         \#!*)
 316                                 _interp=${_interp#\#!}  # strip #!
 317                                 set -- $_interp
 318                                 case $1 in
 319                                 */bin/env)
 320                                         shift   # drop env to get real name
 321                                         ;;
 322                                 esac
 323                                 if [ $_interpreter != $1 ]; then
 324                                         warn "\$command_interpreter $_interpreter != $1"
 325                                 fi
 326                                 ;;
 327                         *)
 328                                 warn "no shebang line in $_script"
 329                                 set -- $_interpreter
 330                                 ;;
 331                         esac
 332                 else
 333                         warn "cannot read shebang line from $_script"
 334                         set -- $_interpreter
 335                 fi
 336                 _interp="$* $_procname"         # cleanup spaces, add _procname
 337                 _interpbn=${1##*/}
 338                 _fp_args='_argv'
 339                 _fp_match='case "$_argv" in
 340                     ${_interp}|"${_interp} "*|"[${_interpbn}]"|"${_interpbn}: ${_procname}"*)'
 341         else                                    # a normal daemon
 342                 _procnamebn=${_procname##*/}
 343                 _fp_args='_arg0 _argv'
 344                 _fp_match='case "$_arg0" in
 345                     $_procname|$_procnamebn|${_procnamebn}:|"(${_procnamebn})"|"[${_procnamebn}]")'
 346         fi
 347
 348         _proccheck="\
 349                 $PS 2>/dev/null -o pid= -o jid= -o command= $_psargs"' |
 350                 while read _npid _jid '"$_fp_args"'; do
 351                         '"$_fp_match"'
 352                                 if [ "$JID" -eq "$_jid" ];
 353                                 then echo -n "$_pref$_npid";
 354                                 _pref=" ";
 355                                 fi
 356                                 ;;
 357                         esac
 358                 done'
 359
 360 #       debug "in _find_processes: proccheck is ($_proccheck)."
 361         eval $_proccheck
 362 }
 363
 364 # sort_lite [-b] [-n] [-k POS] [-t SEP]
 365 #       A lite version of sort(1) (supporting a few options) that can be used
 366 #       before the real sort(1) is available (e.g., in scripts that run prior
 367 #       to mountcritremote). Requires only shell built-in functionality.
 368 #
 369 sort_lite()
 370 {
 371         local funcname=sort_lite
 372         local sort_sep="$IFS" sort_ignore_leading_space=
 373         local sort_field=0 sort_strict_fields= sort_numeric=
 374         local nitems=0 skip_leading=0 trim=
 375
 376         local OPTIND flag
 377         while getopts bnk:t: flag; do
 378                 case "$flag" in
 379                 b) sort_ignore_leading_space=1 ;;
 380                 n) sort_numeric=1 sort_ignore_leading_space=1 ;;
 381                 k) sort_field="${OPTARG%%,*}" ;; # only up to first comma
 382                         # NB: Unlike sort(1) only one POS allowed
 383                 t) sort_sep="$OPTARG"
 384                    if [ ${#sort_sep} -gt 1 ]; then
 385                         echo "$funcname: multi-character tab \`$sort_sep'" >&2
 386                         return 1
 387                    fi
 388                    sort_strict_fields=1
 389                    ;;
 390                 \?) return 1 ;;
 391                 esac
 392         done
 393         shift $(( $OPTIND - 1 ))
 394
 395         # Create transformation pattern to trim leading text if desired
 396         case "$sort_field" in
 397         ""|[!0-9]*|*[!0-9.]*)
 398                 echo "$funcname: invalid sort field \`$sort_field'" >&2
 399                 return 1
 400                 ;;
 401         *.*)
 402                 skip_leading=${sort_field#*.} sort_field=${sort_field%%.*}
 403                 while [ ${skip_leading:-0} -gt 1 ] 2> /dev/null; do
 404                         trim="$trim?" skip_leading=$(( $skip_leading - 1 ))
 405                 done
 406         esac
 407
 408         # Copy input to series of local numbered variables
 409         # NB: IFS of NULL preserves leading whitespace
 410         local LINE
 411         while IFS= read -r LINE || [ "$LINE" ]; do
 412                 nitems=$(( $nitems + 1 ))
 413                 local src_$nitems="$LINE"
 414         done
 415
 416         #
 417         # Sort numbered locals using insertion sort
 418         #
 419         local curitem curitem_orig curitem_mod curitem_haskey
 420         local dest dest_orig dest_mod dest_haskey
 421         local d gt n
 422         local i=1
 423         while [ $i -le $nitems ]; do
 424                 curitem_haskey=1 # Assume sort field (-k POS) exists
 425                 eval curitem=\"\$src_$i\"
 426                 curitem_mod="$curitem" # for modified comparison
 427                 curitem_orig="$curitem" # for original comparison
 428
 429                 # Trim leading whitespace if desired
 430                 if [ "$sort_ignore_leading_space" ]; then
 431                         while case "$curitem_orig" in
 432                                 [$IFS]*) : ;; *) false; esac
 433                         do
 434                                 curitem_orig="${curitem_orig#?}"
 435                         done
 436                         curitem_mod="$curitem_orig"
 437                 fi
 438
 439                 # Shift modified comparison value if sort field (-k POS) is > 1
 440                 n=$sort_field
 441                 while [ $n -gt 1 ]; do
 442                         case "$curitem_mod" in
 443                         *[$sort_sep]*)
 444                                 # Cut text up-to (and incl.) first separator
 445                                 curitem_mod="${curitem_mod#*[$sort_sep]}"
 446
 447                                 # Skip NULLs unless strict field splitting
 448                                 [ "$sort_strict_fields" ] ||
 449                                         [ "${curitem_mod%%[$sort_sep]*}" ] ||
 450                                         [ $n -eq 2 ] ||
 451                                         continue
 452                                 ;;
 453                         *)
 454                                 # Asked for a field that doesn't exist
 455                                 curitem_haskey= break
 456                         esac
 457                         n=$(( $n - 1 ))
 458                 done
 459
 460                 # Trim trailing words if sort field >= 1
 461                 [ $sort_field -ge 1 -a "$sort_numeric" ] &&
 462                         curitem_mod="${curitem_mod%%[$sort_sep]*}"
 463
 464                 # Apply optional trim (-k POS.TRIM) to cut leading characters
 465                 curitem_mod="${curitem_mod#$trim}"
 466
 467                 # Determine the type of modified comparison to use initially
 468                 # NB: Prefer numerical if requested but fallback to standard
 469                 case "$curitem_mod" in
 470                 ""|[!0-9]*) # NULL or begins with non-number
 471                         gt=">"
 472                         [ "$sort_numeric" ] && curitem_mod=0
 473                         ;;
 474                 *)
 475                         if [ "$sort_numeric" ]; then
 476                                 gt="-gt"
 477                                 curitem_mod="${curitem_mod%%[!0-9]*}"
 478                                         # NB: trailing non-digits removed
 479                                         # otherwise numeric comparison fails
 480                         else
 481                                 gt=">"
 482                         fi
 483                 esac
 484
 485                 # If first time through, short-circuit below position-search
 486                 if [ $i -le 1 ]; then
 487                         d=0
 488                 else
 489                         d=1
 490                 fi
 491
 492                 #
 493                 # Find appropriate element position
 494                 #
 495                 while [ $d -gt 0 ]
 496                 do
 497                         dest_haskey=$curitem_haskey
 498                         eval dest=\"\$dest_$d\"
 499                         dest_mod="$dest" # for modified comparison
 500                         dest_orig="$dest" # for original comparison
 501
 502                         # Trim leading whitespace if desired
 503                         if [ "$sort_ignore_leading_space" ]; then
 504                                 while case "$dest_orig" in
 505                                         [$IFS]*) : ;; *) false; esac
 506                                 do
 507                                         dest_orig="${dest_orig#?}"
 508                                 done
 509                                 dest_mod="$dest_orig"
 510                         fi
 511
 512                         # Shift modified value if sort field (-k POS) is > 1
 513                         n=$sort_field
 514                         while [ $n -gt 1 ]; do
 515                                 case "$dest_mod" in
 516                                 *[$sort_sep]*)
 517                                         # Cut text up-to (and incl.) 1st sep
 518                                         dest_mod="${dest_mod#*[$sort_sep]}"
 519
 520                                         # Skip NULLs unless strict fields
 521                                         [ "$sort_strict_fields" ] ||
 522                                             [ "${dest_mod%%[$sort_sep]*}" ] ||
 523                                             [ $n -eq 2 ] ||
 524                                             continue
 525                                         ;;
 526                                 *)
 527                                         # Asked for a field that doesn't exist
 528                                         dest_haskey= break
 529                                 esac
 530                                 n=$(( $n - 1 ))
 531                         done
 532
 533                         # Trim trailing words if sort field >= 1
 534                         [ $sort_field -ge 1 -a "$sort_numeric" ] &&
 535                                 dest_mod="${dest_mod%%[$sort_sep]*}"
 536
 537                         # Apply optional trim (-k POS.TRIM), cut leading chars
 538                         dest_mod="${dest_mod#$trim}"
 539
 540                         # Determine type of modified comparison to use
 541                         # NB: Prefer numerical if requested, fallback to std
 542                         case "$dest_mod" in
 543                         ""|[!0-9]*) # NULL or begins with non-number
 544                                 gt=">"
 545                                 [ "$sort_numeric" ] && dest_mod=0
 546                                 ;;
 547                         *)
 548                                 if [ "$sort_numeric" ]; then
 549                                         gt="-gt"
 550                                         dest_mod="${dest_mod%%[!0-9]*}"
 551                                                 # NB: kill trailing non-digits
 552                                                 # for numeric comparison safety
 553                                 else
 554                                         gt=">"
 555                                 fi
 556                         esac
 557
 558                         # Break if we've found the proper element position
 559                         if [ "$curitem_haskey" -a "$dest_haskey" ]; then
 560                                 if [ "$dest_mod" = "$curitem_mod" ]; then
 561                                         [ "$dest_orig" ">" "$curitem_orig" ] &&
 562                                                 break
 563                                 elif [ "$dest_mod" $gt "$curitem_mod" ] \
 564                                         2> /dev/null
 565                                 then
 566                                         break
 567                                 fi
 568                         else
 569                                 [ "$dest_orig" ">" "$curitem_orig" ] && break
 570                         fi
 571
 572                         # Break if we've hit the end
 573                         [ $d -ge $i ] && break
 574
 575                         d=$(( $d + 1 ))
 576                 done
 577
 578                 # Shift remaining positions forward, making room for new item
 579                 n=$i
 580                 while [ $n -ge $d ]; do
 581                         # Shift destination item forward one placement
 582                         eval dest_$(( $n + 1 ))=\"\$dest_$n\"
 583                         n=$(( $n - 1 ))
 584                 done
 585
 586                 # Place the element
 587                 if [ $i -eq 1 ]; then
 588                         local dest_1="$curitem"
 589                 else
 590                         local dest_$d="$curitem"
 591                 fi
 592
 593                 i=$(( $i + 1 ))
 594         done
 595
 596         # Print sorted results
 597         d=1
 598         while [ $d -le $nitems ]; do
 599                 eval echo \"\$dest_$d\"
 600                 d=$(( $d + 1 ))
 601         done
 602 }
 603
 604 #
 605 # wait_for_pids pid [pid ...]
 606 #       spins until none of the pids exist
 607 #
 608 wait_for_pids()
 609 {
 610         local _list _prefix _nlist _j
 611
 612         _list="$@"
 613         if [ -z "$_list" ]; then
 614                 return
 615         fi
 616         _prefix=
 617         while true; do
 618                 _nlist="";
 619                 for _j in $_list; do
 620                         if kill -0 $_j 2>/dev/null; then
 621                                 _nlist="${_nlist}${_nlist:+ }$_j"
 622                                 [ -n "$_prefix" ] && sleep 1
 623                         fi
 624                 done
 625                 if [ -z "$_nlist" ]; then
 626                         break
 627                 fi
 628                 _list=$_nlist
 629                 echo -n ${_prefix:-"Waiting for PIDS: "}$_list
 630                 _prefix=", "
 631                 pwait $_list 2>/dev/null
 632         done
 633         if [ -n "$_prefix" ]; then
 634                 echo "."
 635         fi
 636 }
 637
 638 #
 639 # get_pidfile_from_conf string file
 640 #
 641 #       Takes a string to search for in the specified file.
 642 #       Ignores lines with traditional comment characters.
 643 #
 644 # Example:
 645 #
 646 # if get_pidfile_from_conf string file; then
 647 #       pidfile="$_pidfile_from_conf"
 648 # else
 649 #       pidfile='appropriate default'
 650 # fi
 651 #
 652 get_pidfile_from_conf()
 653 {
 654         if [ -z "$1" -o -z "$2" ]; then
 655                 err 3 "USAGE: get_pidfile_from_conf string file ($name)"
 656         fi
 657
 658         local string file line
 659
 660         string="$1" ; file="$2"
 661
 662         if [ ! -s "$file" ]; then
 663                 err 3 "get_pidfile_from_conf: $file does not exist ($name)"
 664         fi
 665
 666         while read line; do
 667                 case "$line" in
 668                 *[#\;]*${string}*)      continue ;;
 669                 *${string}*)            break ;;
 670                 esac
 671         done < $file
 672
 673         if [ -n "$line" ]; then
 674                 line=${line#*/}
 675                 _pidfile_from_conf="/${line%%[\"\;]*}"
 676         else
 677                 return 1
 678         fi
 679 }
 680
 681 #
 682 # check_startmsgs
 683 #       If rc_quiet is set (usually as a result of using faststart at
 684 #       boot time) check if rc_startmsgs is enabled.
 685 #
 686 check_startmsgs()
 687 {
 688         if [ -n "$rc_quiet" ]; then
 689                 checkyesno rc_startmsgs
 690         else
 691                 return 0
 692         fi
 693 }
 694
 695 #
 696 # run_rc_command argument
 697 #       Search for argument in the list of supported commands, which is:
 698 #               "start stop restart rcvar status poll ${extra_commands}"
 699 #       If there's a match, run ${argument}_cmd or the default method
 700 #       (see below).
 701 #
 702 #       If argument has a given prefix, then change the operation as follows:
 703 #               Prefix  Operation
 704 #               ------  ---------
 705 #               fast    Skip the pid check, and set rc_fast=yes, rc_quiet=yes
 706 #               force   Set ${rcvar} to YES, and set rc_force=yes
 707 #               one     Set ${rcvar} to YES
 708 #               quiet   Don't output some diagnostics, and set rc_quiet=yes
 709 #
 710 #       The following globals are used:
 711 #
 712 #       Name            Needed  Purpose
 713 #       ----            ------  -------
 714 #       name            y       Name of script.
 715 #
 716 #       command         n       Full path to command.
 717 #                               Not needed if ${rc_arg}_cmd is set for
 718 #                               each keyword.
 719 #
 720 #       command_args    n       Optional args/shell directives for command.
 721 #
 722 #       command_interpreter n   If not empty, command is interpreted, so
 723 #                               call check_{pidfile,process}() appropriately.
 724 #
 725 #       desc            n       Description of script.
 726 #
 727 #       extra_commands  n       List of extra commands supported.
 728 #
 729 #       pidfile         n       If set, use check_pidfile $pidfile $command,
 730 #                               otherwise use check_process $command.
 731 #                               In either case, only check if $command is set.
 732 #
 733 #       procname        n       Process name to check for instead of $command.
 734 #
 735 #       rcvar           n       This is checked with checkyesno to determine
 736 #                               if the action should be run.
 737 #
 738 #       ${name}_program n       Full path to command.
 739 #                               Meant to be used in /etc/rc.conf to override
 740 #                               ${command}.
 741 #
 742 #       ${name}_chroot  n       Directory to chroot to before running ${command}
 743 #                               Requires /usr to be mounted.
 744 #
 745 #       ${name}_chdir   n       Directory to cd to before running ${command}
 746 #                               (if not using ${name}_chroot).
 747 #
 748 #       ${name}_flags   n       Arguments to call ${command} with.
 749 #                               NOTE:   $flags from the parent environment
 750 #                                       can be used to override this.
 751 #
 752 #       ${name}_env     n       Environment variables to run ${command} with.
 753 #
 754 #       ${name}_fib     n       Routing table number to run ${command} with.
 755 #
 756 #       ${name}_nice    n       Nice level to run ${command} at.
 757 #
 758 #       ${name}_user    n       User to run ${command} as, using su(1) if not
 759 #                               using ${name}_chroot.
 760 #                               Requires /usr to be mounted.
 761 #
 762 #       ${name}_group   n       Group to run chrooted ${command} as.
 763 #                               Requires /usr to be mounted.
 764 #
 765 #       ${name}_groups  n       Comma separated list of supplementary groups
 766 #                               to run the chrooted ${command} with.
 767 #                               Requires /usr to be mounted.
 768 #
 769 #       ${name}_prepend n       Command added before ${command}.
 770 #
 771 #       ${rc_arg}_cmd   n       If set, use this as the method when invoked;
 772 #                               Otherwise, use default command (see below)
 773 #
 774 #       ${rc_arg}_precmd n      If set, run just before performing the
 775 #                               ${rc_arg}_cmd method in the default
 776 #                               operation (i.e, after checking for required
 777 #                               bits and process (non)existence).
 778 #                               If this completes with a non-zero exit code,
 779 #                               don't run ${rc_arg}_cmd.
 780 #
 781 #       ${rc_arg}_postcmd n     If set, run just after performing the
 782 #                               ${rc_arg}_cmd method, if that method
 783 #                               returned a zero exit code.
 784 #
 785 #       required_dirs   n       If set, check for the existence of the given
 786 #                               directories before running a (re)start command.
 787 #
 788 #       required_files  n       If set, check for the readability of the given
 789 #                               files before running a (re)start command.
 790 #
 791 #       required_modules n      If set, ensure the given kernel modules are
 792 #                               loaded before running a (re)start command.
 793 #                               The check and possible loads are actually
 794 #                               done after start_precmd so that the modules
 795 #                               aren't loaded in vain, should the precmd
 796 #                               return a non-zero status to indicate a error.
 797 #                               If a word in the list looks like "foo:bar",
 798 #                               "foo" is the KLD file name and "bar" is the
 799 #                               module name.  If a word looks like "foo~bar",
 800 #                               "foo" is the KLD file name and "bar" is a
 801 #                               egrep(1) pattern matching the module name.
 802 #                               Otherwise the module name is assumed to be
 803 #                               the same as the KLD file name, which is most
 804 #                               common.  See load_kld().
 805 #
 806 #       required_vars   n       If set, perform checkyesno on each of the
 807 #                               listed variables before running the default
 808 #                               (re)start command.
 809 #
 810 #       Default behaviour for a given argument, if no override method is
 811 #       provided:
 812 #
 813 #       Argument        Default behaviour
 814 #       --------        -----------------
 815 #       start           if !running && checkyesno ${rcvar}
 816 #                               ${command}
 817 #
 818 #       stop            if ${pidfile}
 819 #                               rc_pid=$(check_pidfile $pidfile $command)
 820 #                       else
 821 #                               rc_pid=$(check_process $command)
 822 #                       kill $sig_stop $rc_pid
 823 #                       wait_for_pids $rc_pid
 824 #                       ($sig_stop defaults to TERM.)
 825 #
 826 #       reload          Similar to stop, except use $sig_reload instead,
 827 #                       and doesn't wait_for_pids.
 828 #                       $sig_reload defaults to HUP.
 829 #                       Note that `reload' isn't provided by default,
 830 #                       it should be enabled via $extra_commands.
 831 #
 832 #       restart         Run `stop' then `start'.
 833 #
 834 #       status          Show if ${command} is running, etc.
 835 #
 836 #       poll            Wait for ${command} to exit.
 837 #
 838 #       rcvar           Display what rc.conf variable is used (if any).
 839 #
 840 #       enabled         Return true if the service is enabled.
 841 #
 842 #       Variables available to methods, and after run_rc_command() has
 843 #       completed:
 844 #
 845 #       Variable        Purpose
 846 #       --------        -------
 847 #       rc_arg          Argument to command, after fast/force/one processing
 848 #                       performed
 849 #
 850 #       rc_flags        Flags to start the default command with.
 851 #                       Defaults to ${name}_flags, unless overridden
 852 #                       by $flags from the environment.
 853 #                       This variable may be changed by the precmd method.
 854 #
 855 #       rc_pid          PID of command (if appropriate)
 856 #
 857 #       rc_fast         Not empty if "fast" was provided (q.v.)
 858 #
 859 #       rc_force        Not empty if "force" was provided (q.v.)
 860 #
 861 #       rc_quiet        Not empty if "quiet" was provided
 862 #
 863 #
 864 run_rc_command()
 865 {
 866         _return=0
 867         rc_arg=$1
 868         if [ -z "$name" ]; then
 869                 err 3 'run_rc_command: $name is not set.'
 870         fi
 871
 872         # Don't repeat the first argument when passing additional command-
 873         # line arguments to the command subroutines.
 874         #
 875         shift 1
 876         rc_extra_args="$*"
 877
 878         _rc_prefix=
 879         case "$rc_arg" in
 880         fast*)                          # "fast" prefix; don't check pid
 881                 rc_arg=${rc_arg#fast}
 882                 rc_fast=yes
 883                 rc_quiet=yes
 884                 ;;
 885         force*)                         # "force" prefix; always run
 886                 rc_force=yes
 887                 _rc_prefix=force
 888                 rc_arg=${rc_arg#${_rc_prefix}}
 889                 if [ -n "${rcvar}" ]; then
 890                         eval ${rcvar}=YES
 891                 fi
 892                 ;;
 893         one*)                           # "one" prefix; set ${rcvar}=yes
 894                 _rc_prefix=one
 895                 rc_arg=${rc_arg#${_rc_prefix}}
 896                 if [ -n "${rcvar}" ]; then
 897                         eval ${rcvar}=YES
 898                 fi
 899                 ;;
 900         quiet*)                         # "quiet" prefix; omit some messages
 901                 _rc_prefix=quiet
 902                 rc_arg=${rc_arg#${_rc_prefix}}
 903                 rc_quiet=yes
 904                 ;;
 905         esac
 906
 907         eval _override_command=\$${name}_program
 908         command=${_override_command:-$command}
 909
 910         _keywords="start stop restart rcvar enabled $extra_commands"
 911         rc_pid=
 912         _pidcmd=
 913         _procname=${procname:-${command}}
 914
 915                                         # setup pid check command
 916         if [ -n "$_procname" ]; then
 917                 if [ -n "$pidfile" ]; then
 918                         _pidcmd='rc_pid=$(check_pidfile '"$pidfile $_procname $command_interpreter"')'
 919                 else
 920                         _pidcmd='rc_pid=$(check_process '"$_procname $command_interpreter"')'
 921                 fi
 922                 if [ -n "$_pidcmd" ]; then
 923                         _keywords="${_keywords} status poll"
 924                 fi
 925         fi
 926
 927         if [ -z "$rc_arg" ]; then
 928                 rc_usage $_keywords
 929         fi
 930
 931         if [ "$rc_arg" = "enabled" ] ; then
 932                 checkyesno ${rcvar}
 933                 return $?
 934         fi
 935
 936         if [ -n "$flags" ]; then        # allow override from environment
 937                 rc_flags=$flags
 938         else
 939                 eval rc_flags=\$${name}_flags
 940         fi
 941         eval _chdir=\$${name}_chdir     _chroot=\$${name}_chroot \
 942             _nice=\$${name}_nice        _user=\$${name}_user \
 943             _group=\$${name}_group      _groups=\$${name}_groups \
 944             _fib=\$${name}_fib          _env=\$${name}_env \
 945             _prepend=\$${name}_prepend
 946
 947         if [ -n "$_user" ]; then        # unset $_user if running as that user
 948                 if [ "$_user" = "$(eval $IDCMD)" ]; then
 949                         unset _user
 950                 fi
 951         fi
 952
 953         [ -z "$autoboot" ] && eval $_pidcmd     # determine the pid if necessary
 954
 955         for _elem in $_keywords; do
 956                 if [ "$_elem" != "$rc_arg" ]; then
 957                         continue
 958                 fi
 959                                         # if ${rcvar} is set, $1 is not "rcvar"
 960                                         # and ${rc_pid} is not set, then run
 961                                         #       checkyesno ${rcvar}
 962                                         # and return if that failed
 963                                         #
 964                 if [ -n "${rcvar}" -a "$rc_arg" != "rcvar" -a "$rc_arg" != "stop" ] ||
 965                     [ -n "${rcvar}" -a "$rc_arg" = "stop" -a -z "${rc_pid}" ]; then
 966                         if ! checkyesno ${rcvar}; then
 967                                 if [ -n "${rc_quiet}" ]; then
 968                                         return 0
 969                                 fi
 970                                 echo -n "Cannot '${rc_arg}' $name. Set ${rcvar} to "
 971                                 echo -n "YES in /etc/rc.conf or use 'one${rc_arg}' "
 972                                 echo "instead of '${rc_arg}'."
 973                                 return 0
 974                         fi
 975                 fi
 976
 977                 if [ $rc_arg = "start" -a -z "$rc_fast" -a -n "$rc_pid" ]; then
 978                         if [ -z "$rc_quiet" ]; then
 979                                 echo 1>&2 "${name} already running? " \
 980                                     "(pid=$rc_pid)."
 981                         fi
 982                         return 1
 983                 fi
 984
 985                                         # if there's a custom ${XXX_cmd},
 986                                         # run that instead of the default
 987                                         #
 988                 eval _cmd=\$${rc_arg}_cmd \
 989                      _precmd=\$${rc_arg}_precmd \
 990                      _postcmd=\$${rc_arg}_postcmd
 991
 992                 if [ -n "$_cmd" ]; then
 993                         _run_rc_precmd || return 1
 994                         _run_rc_doit "$_cmd $rc_extra_args" || return 1
 995                         _run_rc_postcmd
 996                         return $_return
 997                 fi
 998
 999                 case "$rc_arg" in       # default operations...
1000
1001                 status)
1002                         _run_rc_precmd || return 1
1003                         if [ -n "$rc_pid" ]; then
1004                                 echo "${name} is running as pid $rc_pid."
1005                         else
1006                                 echo "${name} is not running."
1007                                 return 1
1008                         fi
1009                         _run_rc_postcmd
1010                         ;;
1011
1012                 start)
1013                         if [ ! -x "${_chroot}${_chroot:+/}${command}" ]; then
1014                                 warn "run_rc_command: cannot run $command"
1015                                 return 1
1016                         fi
1017
1018                         if ! _run_rc_precmd; then
1019                                 warn "failed precmd routine for ${name}"
1020                                 return 1
1021                         fi
1022
1023                                         # setup the full command to run
1024                                         #
1025                         check_startmsgs && echo "Starting ${name}."
1026                         if [ -n "$_chroot" ]; then
1027                                 _doit="\
1028 ${_nice:+nice -n $_nice }\
1029 ${_fib:+setfib -F $_fib }\
1030 ${_env:+env $_env }\
1031 chroot ${_user:+-u $_user }${_group:+-g $_group }${_groups:+-G $_groups }\
1032 $_chroot $command $rc_flags $command_args"
1033                         else
1034                                 _doit="\
1035 ${_chdir:+cd $_chdir && }\
1036 ${_fib:+setfib -F $_fib }\
1037 ${_env:+env $_env }\
1038 $command $rc_flags $command_args"
1039                                 if [ -n "$_user" ]; then
1040                                     _doit="su -m $_user -c 'sh -c \"$_doit\"'"
1041                                 fi
1042                                 if [ -n "$_nice" ]; then
1043                                         if [ -z "$_user" ]; then
1044                                                 _doit="sh -c \"$_doit\""
1045                                         fi
1046                                         _doit="nice -n $_nice $_doit"
1047                                 fi
1048                                 if [ -n "$_prepend" ]; then
1049                                         _doit="$_prepend $_doit"
1050                                 fi
1051                         fi
1052
1053                                         # run the full command
1054                                         #
1055                         if ! _run_rc_doit "$_doit"; then
1056                                 warn "failed to start ${name}"
1057                                 return 1
1058                         fi
1059
1060                                         # finally, run postcmd
1061                                         #
1062                         _run_rc_postcmd
1063                         ;;
1064
1065                 stop)
1066                         if [ -z "$rc_pid" ]; then
1067                                 [ -n "$rc_fast" ] && return 0
1068                                 _run_rc_notrunning
1069                                 return 1
1070                         fi
1071
1072                         _run_rc_precmd || return 1
1073
1074                                         # send the signal to stop
1075                                         #
1076                         echo "Stopping ${name}."
1077                         _doit=$(_run_rc_killcmd "${sig_stop:-TERM}")
1078                         _run_rc_doit "$_doit" || return 1
1079
1080                                         # wait for the command to exit,
1081                                         # and run postcmd.
1082                         wait_for_pids $rc_pid
1083
1084                         _run_rc_postcmd
1085                         ;;
1086
1087                 reload)
1088                         if [ -z "$rc_pid" ]; then
1089                                 _run_rc_notrunning
1090                                 return 1
1091                         fi
1092
1093                         _run_rc_precmd || return 1
1094
1095                         _doit=$(_run_rc_killcmd "${sig_reload:-HUP}")
1096                         _run_rc_doit "$_doit" || return 1
1097
1098                         _run_rc_postcmd
1099                         ;;
1100
1101                 restart)
1102                                         # prevent restart being called more
1103                                         # than once by any given script
1104                                         #
1105                         if ${_rc_restart_done:-false}; then
1106                                 return 0
1107                         fi
1108                         _rc_restart_done=true
1109
1110                         _run_rc_precmd || return 1
1111
1112                         # run those in a subshell to keep global variables
1113                         ( run_rc_command ${_rc_prefix}stop $rc_extra_args )
1114                         ( run_rc_command ${_rc_prefix}start $rc_extra_args )
1115                         _return=$?
1116                         [ $_return -ne 0 ] && [ -z "$rc_force" ] && return 1
1117
1118                         _run_rc_postcmd
1119                         ;;
1120
1121                 poll)
1122                         _run_rc_precmd || return 1
1123                         if [ -n "$rc_pid" ]; then
1124                                 wait_for_pids $rc_pid
1125                         fi
1126                         _run_rc_postcmd
1127                         ;;
1128
1129                 rcvar)
1130                         echo -n "# $name"
1131                         if [ -n "$desc" ]; then
1132                                 echo " : $desc"
1133                         else
1134                                 echo ""
1135                         fi
1136                         echo "#"
1137                         # Get unique vars in $rcvar $rcvars
1138                         for _v in $rcvar $rcvars; do
1139                                 case $v in
1140                                 $_v\ *|\ *$_v|*\ $_v\ *) ;;
1141                                 *)      v="${v# } $_v" ;;
1142                                 esac
1143                         done
1144
1145                         # Display variables.
1146                         for _v in $v; do
1147                                 if [ -z "$_v" ]; then
1148                                         continue
1149                                 fi
1150
1151                                 eval _desc=\$${_v}_desc
1152                                 eval _defval=\$${_v}_defval
1153                                 _h="-"
1154
1155                                 eval echo \"$_v=\\\"\$$_v\\\"\"
1156                                 # decode multiple lines of _desc
1157                                 while [ -n "$_desc" ]; do
1158                                         case $_desc in
1159                                         *^^*)
1160                                                 echo "# $_h ${_desc%%^^*}"
1161                                                 _desc=${_desc#*^^}
1162                                                 _h=" "
1163                                                 ;;
1164                                         *)
1165                                                 echo "# $_h ${_desc}"
1166                                                 break
1167                                                 ;;
1168                                         esac
1169                                 done
1170                                 echo "#   (default: \"$_defval\")"
1171                         done
1172                         echo ""
1173                         ;;
1174
1175                 *)
1176                         rc_usage $_keywords
1177                         ;;
1178
1179                 esac
1180                 return $_return
1181         done
1182
1183         echo 1>&2 "$0: unknown directive '$rc_arg'."
1184         rc_usage $_keywords
1185         # not reached
1186 }
1187
1188 #
1189 # Helper functions for run_rc_command: common code.
1190 # They use such global variables besides the exported rc_* ones:
1191 #
1192 #       name           R/W
1193 #       ------------------
1194 #       _precmd         R
1195 #       _postcmd        R
1196 #       _return         W
1197 #
1198 _run_rc_precmd()
1199 {
1200         check_required_before "$rc_arg" || return 1
1201
1202         if [ -n "$_precmd" ]; then
1203                 debug "run_rc_command: ${rc_arg}_precmd: $_precmd $rc_extra_args"
1204                 eval "$_precmd $rc_extra_args"
1205                 _return=$?
1206
1207                 # If precmd failed and force isn't set, request exit.
1208                 if [ $_return -ne 0 ] && [ -z "$rc_force" ]; then
1209                         return 1
1210                 fi
1211         fi
1212
1213         check_required_after "$rc_arg" || return 1
1214
1215         return 0
1216 }
1217
1218 _run_rc_postcmd()
1219 {
1220         if [ -n "$_postcmd" ]; then
1221                 debug "run_rc_command: ${rc_arg}_postcmd: $_postcmd $rc_extra_args"
1222                 eval "$_postcmd $rc_extra_args"
1223                 _return=$?
1224         fi
1225         return 0
1226 }
1227
1228 _run_rc_doit()
1229 {
1230         debug "run_rc_command: doit: $*"
1231         eval "$@"
1232         _return=$?
1233
1234         # If command failed and force isn't set, request exit.
1235         if [ $_return -ne 0 ] && [ -z "$rc_force" ]; then
1236                 return 1
1237         fi
1238
1239         return 0
1240 }
1241
1242 _run_rc_notrunning()
1243 {
1244         local _pidmsg
1245
1246         if [ -n "$pidfile" ]; then
1247                 _pidmsg=" (check $pidfile)."
1248         else
1249                 _pidmsg=
1250         fi
1251         echo 1>&2 "${name} not running?${_pidmsg}"
1252 }
1253
1254 _run_rc_killcmd()
1255 {
1256         local _cmd
1257
1258         _cmd="kill -$1 $rc_pid"
1259         if [ -n "$_user" ]; then
1260                 _cmd="su -m ${_user} -c 'sh -c \"${_cmd}\"'"
1261         fi
1262         echo "$_cmd"
1263 }
1264
1265 #
1266 # run_rc_script file arg
1267 #       Start the script `file' with `arg', and correctly handle the
1268 #       return value from the script.
1269 #       If `file' ends with `.sh', it's sourced into the current environment
1270 #       when $rc_fast_and_loose is set, otherwise it is run as a child process.
1271 #       If `file' appears to be a backup or scratch file, ignore it.
1272 #       Otherwise if it is executable run as a child process.
1273 #
1274 run_rc_script()
1275 {
1276         _file=$1
1277         _arg=$2
1278         if [ -z "$_file" -o -z "$_arg" ]; then
1279                 err 3 'USAGE: run_rc_script file arg'
1280         fi
1281
1282         unset   name command command_args command_interpreter \
1283                 extra_commands pidfile procname \
1284                 rcvar rcvars rcvars_obsolete required_dirs required_files \
1285                 required_vars
1286         eval unset ${_arg}_cmd ${_arg}_precmd ${_arg}_postcmd
1287
1288         case "$_file" in
1289         /etc/rc.d/*.sh)                 # no longer allowed in the base
1290                 warn "Ignoring old-style startup script $_file"
1291                 ;;
1292         *[~#]|*.OLD|*.bak|*.orig|*,v)   # scratch file; skip
1293                 warn "Ignoring scratch file $_file"
1294                 ;;
1295         *)                              # run in subshell
1296                 if [ -x $_file ]; then
1297                         if [ -n "$rc_fast_and_loose" ]; then
1298                                 set $_arg; . $_file
1299                         else
1300                                 ( trap "echo Script $_file interrupted >&2 ; kill -QUIT $$" 3
1301                                   trap "echo Script $_file interrupted >&2 ; exit 1" 2
1302                                   trap "echo Script $_file running >&2" 29
1303                                   set $_arg; . $_file )
1304                         fi
1305                 fi
1306                 ;;
1307         esac
1308 }
1309
1310 #
1311 # load_rc_config [service]
1312 #       Source in the configuration file(s) for a given service.
1313 #       If no service is specified, only the global configuration
1314 #       file(s) will be loaded.
1315 #
1316 load_rc_config()
1317 {
1318         local _name _rcvar_val _var _defval _v _msg _new _d
1319         _name=$1
1320
1321         if ${_rc_conf_loaded:-false}; then
1322                 :
1323         else
1324                 if [ -r /etc/defaults/rc.conf ]; then
1325                         debug "Sourcing /etc/defaults/rc.conf"
1326                         . /etc/defaults/rc.conf
1327                         source_rc_confs
1328                 elif [ -r /etc/rc.conf ]; then
1329                         debug "Sourcing /etc/rc.conf (/etc/defaults/rc.conf doesn't exist)."
1330                         . /etc/rc.conf
1331                 fi
1332                 _rc_conf_loaded=true
1333         fi
1334
1335         # If a service name was specified, attempt to load
1336         # service-specific configuration
1337         if [ -n "$_name" ] ; then
1338                 for _d in /etc ${local_startup}; do
1339                         _d=${_d%/rc.d}
1340                         if [ -f ${_d}/rc.conf.d/"$_name" ]; then
1341                                 debug "Sourcing ${_d}/rc.conf.d/$_name"
1342                                 . ${_d}/rc.conf.d/"$_name"
1343                         elif [ -d ${_d}/rc.conf.d/"$_name" ] ; then
1344                                 local _rc
1345                                 for _rc in ${_d}/rc.conf.d/"$_name"/* ; do
1346                                         if [ -f "$_rc" ] ; then
1347                                                 debug "Sourcing $_rc"
1348                                                 . "$_rc"
1349                                         fi
1350                                 done
1351                         fi
1352                 done
1353         fi
1354
1355         # Set defaults if defined.
1356         for _var in $rcvar $rcvars; do
1357                 eval _defval=\$${_var}_defval
1358                 if [ -n "$_defval" ]; then
1359                         eval : \${$_var:=\$${_var}_defval}
1360                 fi
1361         done
1362
1363         # check obsolete rc.conf variables
1364         for _var in $rcvars_obsolete; do
1365                 eval _v=\$$_var
1366                 eval _msg=\$${_var}_obsolete_msg
1367                 eval _new=\$${_var}_newvar
1368                 case $_v in
1369                 "")
1370                         ;;
1371                 *)
1372                         if [ -z "$_new" ]; then
1373                                 _msg="Ignored."
1374                         else
1375                                 eval $_new=\"\$$_var\"
1376                                 if [ -z "$_msg" ]; then
1377                                         _msg="Use \$$_new instead."
1378                                 fi
1379                         fi
1380                         warn "\$$_var is obsolete.  $_msg"
1381                         ;;
1382                 esac
1383         done
1384 }
1385
1386 #
1387 # load_rc_config_var name var
1388 #       Read the rc.conf(5) var for name and set in the
1389 #       current shell, using load_rc_config in a subshell to prevent
1390 #       unwanted side effects from other variable assignments.
1391 #
1392 load_rc_config_var()
1393 {
1394         if [ $# -ne 2 ]; then
1395                 err 3 'USAGE: load_rc_config_var name var'
1396         fi
1397         eval $(eval '(
1398                 load_rc_config '$1' >/dev/null;
1399                 if [ -n "${'$2'}" -o "${'$2'-UNSET}" != "UNSET" ]; then
1400                         echo '$2'=\'\''${'$2'}\'\'';
1401                 fi
1402         )' )
1403 }
1404
1405 #
1406 # rc_usage commands
1407 #       Print a usage string for $0, with `commands' being a list of
1408 #       valid commands.
1409 #
1410 rc_usage()
1411 {
1412         echo -n 1>&2 "Usage: $0 [fast|force|one|quiet]("
1413
1414         _sep=
1415         for _elem; do
1416                 echo -n 1>&2 "$_sep$_elem"
1417                 _sep="|"
1418         done
1419         echo 1>&2 ")"
1420         exit 1
1421 }
1422
1423 #
1424 # err exitval message
1425 #       Display message to stderr and log to the syslog, and exit with exitval.
1426 #
1427 err()
1428 {
1429         exitval=$1
1430         shift
1431
1432         if [ -x /usr/bin/logger ]; then
1433                 logger "$0: ERROR: $*"
1434         fi
1435         echo 1>&2 "$0: ERROR: $*"
1436         exit $exitval
1437 }
1438
1439 #
1440 # warn message
1441 #       Display message to stderr and log to the syslog.
1442 #
1443 warn()
1444 {
1445         if [ -x /usr/bin/logger ]; then
1446                 logger "$0: WARNING: $*"
1447         fi
1448         echo 1>&2 "$0: WARNING: $*"
1449 }
1450
1451 #
1452 # info message
1453 #       Display informational message to stdout and log to syslog.
1454 #
1455 info()
1456 {
1457         case ${rc_info} in
1458         [Yy][Ee][Ss]|[Tt][Rr][Uu][Ee]|[Oo][Nn]|1)
1459                 if [ -x /usr/bin/logger ]; then
1460                         logger "$0: INFO: $*"
1461                 fi
1462                 echo "$0: INFO: $*"
1463                 ;;
1464         esac
1465 }
1466
1467 #
1468 # debug message
1469 #       If debugging is enabled in rc.conf output message to stderr.
1470 #       BEWARE that you don't call any subroutine that itself calls this
1471 #       function.
1472 #
1473 debug()
1474 {
1475         case ${rc_debug} in
1476         [Yy][Ee][Ss]|[Tt][Rr][Uu][Ee]|[Oo][Nn]|1)
1477                 if [ -x /usr/bin/logger ]; then
1478                         logger "$0: DEBUG: $*"
1479                 fi
1480                 echo 1>&2 "$0: DEBUG: $*"
1481                 ;;
1482         esac
1483 }
1484
1485 #
1486 # backup_file action file cur backup
1487 #       Make a backup copy of `file' into `cur', and save the previous
1488 #       version of `cur' as `backup' or use rcs for archiving.
1489 #
1490 #       This routine checks the value of the backup_uses_rcs variable,
1491 #       which can be either YES or NO.
1492 #
1493 #       The `action' keyword can be one of the following:
1494 #
1495 #       add             `file' is now being backed up (and is possibly
1496 #                       being reentered into the backups system).  `cur'
1497 #                       is created and RCS files, if necessary, are
1498 #                       created as well.
1499 #
1500 #       update          `file' has changed and needs to be backed up.
1501 #                       If `cur' exists, it is copied to to `back' or
1502 #                       checked into RCS (if the repository file is old),
1503 #                       and then `file' is copied to `cur'.  Another RCS
1504 #                       check in done here if RCS is being used.
1505 #
1506 #       remove          `file' is no longer being tracked by the backups
1507 #                       system.  If RCS is not being used, `cur' is moved
1508 #                       to `back', otherwise an empty file is checked in,
1509 #                       and then `cur' is removed.
1510 #
1511 #
1512 backup_file()
1513 {
1514         _action=$1
1515         _file=$2
1516         _cur=$3
1517         _back=$4
1518
1519         if checkyesno backup_uses_rcs; then
1520                 _msg0="backup archive"
1521                 _msg1="update"
1522
1523                 # ensure that history file is not locked
1524                 if [ -f $_cur,v ]; then
1525                         rcs -q -u -U -M $_cur
1526                 fi
1527
1528                 # ensure after switching to rcs that the
1529                 # current backup is not lost
1530                 if [ -f $_cur ]; then
1531                         # no archive, or current newer than archive
1532                         if [ ! -f $_cur,v -o $_cur -nt $_cur,v ]; then
1533                                 ci -q -f -u -t-"$_msg0" -m"$_msg1" $_cur
1534                                 rcs -q -kb -U $_cur
1535                                 co -q -f -u $_cur
1536                         fi
1537                 fi
1538
1539                 case $_action in
1540                 add|update)
1541                         cp -p $_file $_cur
1542                         ci -q -f -u -t-"$_msg0" -m"$_msg1" $_cur
1543                         rcs -q -kb -U $_cur
1544                         co -q -f -u $_cur
1545                         chown root:wheel $_cur $_cur,v
1546                         ;;
1547                 remove)
1548                         cp /dev/null $_cur
1549                         ci -q -f -u -t-"$_msg0" -m"$_msg1" $_cur
1550                         rcs -q -kb -U $_cur
1551                         chown root:wheel $_cur $_cur,v
1552                         rm $_cur
1553                         ;;
1554                 esac
1555         else
1556                 case $_action in
1557                 add|update)
1558                         if [ -f $_cur ]; then
1559                                 cp -p $_cur $_back
1560                         fi
1561                         cp -p $_file $_cur
1562                         chown root:wheel $_cur
1563                         ;;
1564                 remove)
1565                         mv -f $_cur $_back
1566                         ;;
1567                 esac
1568         fi
1569 }
1570
1571 # make_symlink src link
1572 #       Make a symbolic link 'link' to src from basedir. If the
1573 #       directory in which link is to be created does not exist
1574 #       a warning will be displayed and an error will be returned.
1575 #       Returns 0 on success, 1 otherwise.
1576 #
1577 make_symlink()
1578 {
1579         local src link linkdir _me
1580         src="$1"
1581         link="$2"
1582         linkdir="`dirname $link`"
1583         _me="make_symlink()"
1584
1585         if [ -z "$src" -o -z "$link" ]; then
1586                 warn "$_me: requires two arguments."
1587                 return 1
1588         fi
1589         if [ ! -d "$linkdir" ]; then
1590                 warn "$_me: the directory $linkdir does not exist."
1591                 return 1
1592         fi
1593         if ! ln -sf $src $link; then
1594                 warn "$_me: unable to make a symbolic link from $link to $src"
1595                 return 1
1596         fi
1597         return 0
1598 }
1599
1600 # devfs_rulesets_from_file file
1601 #       Reads a set of devfs commands from file, and creates
1602 #       the specified rulesets with their rules. Returns non-zero
1603 #       if there was an error.
1604 #
1605 devfs_rulesets_from_file()
1606 {
1607         local file _err _me _opts
1608         file="$1"
1609         _me="devfs_rulesets_from_file"
1610         _err=0
1611
1612         if [ -z "$file" ]; then
1613                 warn "$_me: you must specify a file"
1614                 return 1
1615         fi
1616         if [ ! -e "$file" ]; then
1617                 debug "$_me: no such file ($file)"
1618                 return 0
1619         fi
1620
1621         # Disable globbing so that the rule patterns are not expanded
1622         # by accident with matching filesystem entries.
1623         _opts=$-; set -f
1624
1625         debug "reading rulesets from file ($file)"
1626         { while read line
1627         do
1628                 case $line in
1629                 \#*)
1630                         continue
1631                         ;;
1632                 \[*\]*)
1633                         rulenum=`expr "$line" : "\[.*=\([0-9]*\)\]"`
1634                         if [ -z "$rulenum" ]; then
1635                                 warn "$_me: cannot extract rule number ($line)"
1636                                 _err=1
1637                                 break
1638                         fi
1639                         rulename=`expr "$line" : "\[\(.*\)=[0-9]*\]"`
1640                         if [ -z "$rulename" ]; then
1641                                 warn "$_me: cannot extract rule name ($line)"
1642                                 _err=1
1643                                 break;
1644                         fi
1645                         eval $rulename=\$rulenum
1646                         debug "found ruleset: $rulename=$rulenum"
1647                         if ! /sbin/devfs rule -s $rulenum delset; then
1648                                 _err=1
1649                                 break
1650                         fi
1651                         ;;
1652                 *)
1653                         rulecmd="${line%%"\#*"}"
1654                         # evaluate the command incase it includes
1655                         # other rules
1656                         if [ -n "$rulecmd" ]; then
1657                                 debug "adding rule ($rulecmd)"
1658                                 if ! eval /sbin/devfs rule -s $rulenum $rulecmd
1659                                 then
1660                                         _err=1
1661                                         break
1662                                 fi
1663                         fi
1664                         ;;
1665                 esac
1666                 if [ $_err -ne 0 ]; then
1667                         debug "error in $_me"
1668                         break
1669                 fi
1670         done } < $file
1671         case $_opts in *f*) ;; *) set +f ;; esac
1672         return $_err
1673 }
1674
1675 # devfs_init_rulesets
1676 #       Initializes rulesets from configuration files. Returns
1677 #       non-zero if there was an error.
1678 #
1679 devfs_init_rulesets()
1680 {
1681         local file _me
1682         _me="devfs_init_rulesets"
1683
1684         # Go through this only once
1685         if [ -n "$devfs_rulesets_init" ]; then
1686                 debug "$_me: devfs rulesets already initialized"
1687                 return
1688         fi
1689         for file in $devfs_rulesets; do
1690                 if ! devfs_rulesets_from_file $file; then
1691                         warn "$_me: could not read rules from $file"
1692                         return 1
1693                 fi
1694         done
1695         devfs_rulesets_init=1
1696         debug "$_me: devfs rulesets initialized"
1697         return 0
1698 }
1699
1700 # devfs_set_ruleset ruleset [dir]
1701 #       Sets the default ruleset of dir to ruleset. The ruleset argument
1702 #       must be a ruleset name as specified in devfs.rules(5) file.
1703 #       Returns non-zero if it could not set it successfully.
1704 #
1705 devfs_set_ruleset()
1706 {
1707         local devdir rs _me
1708         [ -n "$1" ] && eval rs=\$$1 || rs=
1709         [ -n "$2" ] && devdir="-m "$2"" || devdir=
1710         _me="devfs_set_ruleset"
1711
1712         if [ -z "$rs" ]; then
1713                 warn "$_me: you must specify a ruleset number"
1714                 return 1
1715         fi
1716         debug "$_me: setting ruleset ($rs) on mount-point (${devdir#-m })"
1717         if ! /sbin/devfs $devdir ruleset $rs; then
1718                 warn "$_me: unable to set ruleset $rs to ${devdir#-m }"
1719                 return 1
1720         fi
1721         return 0
1722 }
1723
1724 # devfs_apply_ruleset ruleset [dir]
1725 #       Apply ruleset number $ruleset to the devfs mountpoint $dir.
1726 #       The ruleset argument must be a ruleset name as specified
1727 #       in a devfs.rules(5) file.  Returns 0 on success or non-zero
1728 #       if it could not apply the ruleset.
1729 #
1730 devfs_apply_ruleset()
1731 {
1732         local devdir rs _me
1733         [ -n "$1" ] && eval rs=\$$1 || rs=
1734         [ -n "$2" ] && devdir="-m "$2"" || devdir=
1735         _me="devfs_apply_ruleset"
1736
1737         if [ -z "$rs" ]; then
1738                 warn "$_me: you must specify a ruleset"
1739                 return 1
1740         fi
1741         debug "$_me: applying ruleset ($rs) to mount-point (${devdir#-m })"
1742         if ! /sbin/devfs $devdir rule -s $rs applyset; then
1743                 warn "$_me: unable to apply ruleset $rs to ${devdir#-m }"
1744                 return 1
1745         fi
1746         return 0
1747 }
1748
1749 # devfs_domount dir [ruleset]
1750 #       Mount devfs on dir. If ruleset is specified it is set
1751 #       on the mount-point. It must also be a ruleset name as specified
1752 #       in a devfs.rules(5) file. Returns 0 on success.
1753 #
1754 devfs_domount()
1755 {
1756         local devdir rs _me
1757         devdir="$1"
1758         [ -n "$2" ] && rs=$2 || rs=
1759         _me="devfs_domount()"
1760
1761         if [ -z "$devdir" ]; then
1762                 warn "$_me: you must specify a mount-point"
1763                 return 1
1764         fi
1765         debug "$_me: mount-point is ($devdir), ruleset is ($rs)"
1766         if ! mount -t devfs dev "$devdir"; then
1767                 warn "$_me: Unable to mount devfs on $devdir"
1768                 return 1
1769         fi
1770         if [ -n "$rs" ]; then
1771                 devfs_init_rulesets
1772                 devfs_set_ruleset $rs $devdir
1773                 devfs -m $devdir rule applyset
1774         fi
1775         return 0
1776 }
1777
1778 # Provide a function for normalizing the mounting of memory
1779 # filesystems.  This should allow the rest of the code here to remain
1780 # as close as possible between 5-current and 4-stable.
1781 #   $1 = size
1782 #   $2 = mount point
1783 #   $3 = (optional) extra mdmfs flags
1784 mount_md()
1785 {
1786         if [ -n "$3" ]; then
1787                 flags="$3"
1788         fi
1789         /sbin/mdmfs $flags -s $1 md $2
1790 }
1791
1792 # Code common to scripts that need to load a kernel module
1793 # if it isn't in the kernel yet. Syntax:
1794 #   load_kld [-e regex] [-m module] file
1795 # where -e or -m chooses the way to check if the module
1796 # is already loaded:
1797 #   regex is egrep'd in the output from `kldstat -v',
1798 #   module is passed to `kldstat -m'.
1799 # The default way is as though `-m file' were specified.
1800 load_kld()
1801 {
1802         local _loaded _mod _opt _re
1803
1804         while getopts "e:m:" _opt; do
1805                 case "$_opt" in
1806                 e) _re="$OPTARG" ;;
1807                 m) _mod="$OPTARG" ;;
1808                 *) err 3 'USAGE: load_kld [-e regex] [-m module] file' ;;
1809                 esac
1810         done
1811         shift $(($OPTIND - 1))
1812         if [ $# -ne 1 ]; then
1813                 err 3 'USAGE: load_kld [-e regex] [-m module] file'
1814         fi
1815         _mod=${_mod:-$1}
1816         _loaded=false
1817         if [ -n "$_re" ]; then
1818                 if kldstat -v | egrep -q -e "$_re"; then
1819                         _loaded=true
1820                 fi
1821         else
1822                 if kldstat -q -m "$_mod"; then
1823                         _loaded=true
1824                 fi
1825         fi
1826         if ! $_loaded; then
1827                 if ! kldload "$1"; then
1828                         warn "Unable to load kernel module $1"
1829                         return 1
1830                 else
1831                         info "$1 kernel module loaded."
1832                 fi
1833         else
1834                 debug "load_kld: $1 kernel module already loaded."
1835         fi
1836         return 0
1837 }
1838
1839 # ltr str src dst [var]
1840 #       Change every $src in $str to $dst.
1841 #       Useful when /usr is not yet mounted and we cannot use tr(1), sed(1) nor
1842 #       awk(1). If var is non-NULL, set it to the result.
1843 ltr()
1844 {
1845         local _str _src _dst _out _com _var
1846         _str="$1"
1847         _src="$2"
1848         _dst="$3"
1849         _var="$4"
1850         _out=""
1851
1852         local IFS="${_src}"
1853         for _com in ${_str}; do
1854                 if [ -z "${_out}" ]; then
1855                         _out="${_com}"
1856                 else
1857                         _out="${_out}${_dst}${_com}"
1858                 fi
1859         done
1860         if [ -n "${_var}" ]; then
1861                 setvar "${_var}" "${_out}"
1862         else
1863                 echo "${_out}"
1864         fi
1865 }
1866
1867 # Creates a list of providers for GELI encryption.
1868 geli_make_list()
1869 {
1870         local devices devices2
1871         local provider mountpoint type options rest
1872
1873         # Create list of GELI providers from fstab.
1874         while read provider mountpoint type options rest ; do
1875                 case ":${options}" in
1876                 :*noauto*)
1877                         noauto=yes
1878                         ;;
1879                 *)
1880                         noauto=no
1881                         ;;
1882                 esac
1883
1884                 case ":${provider}" in
1885                 :#*)
1886                         continue
1887                         ;;
1888                 *.eli)
1889                         # Skip swap devices.
1890                         if [ "${type}" = "swap" -o "${options}" = "sw" -o "${noauto}" = "yes" ]; then
1891                                 continue
1892                         fi
1893                         devices="${devices} ${provider}"
1894                         ;;
1895                 esac
1896         done < /etc/fstab
1897
1898         # Append providers from geli_devices.
1899         devices="${devices} ${geli_devices}"
1900
1901         for provider in ${devices}; do
1902                 provider=${provider%.eli}
1903                 provider=${provider#/dev/}
1904                 devices2="${devices2} ${provider}"
1905         done
1906
1907         echo ${devices2}
1908 }
1909
1910 # Find scripts in local_startup directories that use the old syntax
1911 #
1912 find_local_scripts_old() {
1913         zlist=''
1914         slist=''
1915         for dir in ${local_startup}; do
1916                 if [ -d "${dir}" ]; then
1917                         for file in ${dir}/[0-9]*.sh; do
1918                                 grep '^# PROVIDE:' $file >/dev/null 2>&1 &&
1919                                     continue
1920                                 zlist="$zlist $file"
1921                         done
1922                         for file in ${dir}/[!0-9]*.sh; do
1923                                 grep '^# PROVIDE:' $file >/dev/null 2>&1 &&
1924                                     continue
1925                                 slist="$slist $file"
1926                         done
1927                 fi
1928         done
1929 }
1930
1931 find_local_scripts_new() {
1932         local_rc=''
1933         for dir in ${local_startup}; do
1934                 if [ -d "${dir}" ]; then
1935                         for file in `grep -l '^# PROVIDE:' ${dir}/* 2>/dev/null`; do
1936                                 case "$file" in
1937                                 *.sample) ;;
1938                                 *)      if [ -x "$file" ]; then
1939                                                 local_rc="${local_rc} ${file}"
1940                                         fi
1941                                         ;;
1942                                 esac
1943                         done
1944                 fi
1945         done
1946 }
1947
1948 # check_required_{before|after} command
1949 #       Check for things required by the command before and after its precmd,
1950 #       respectively.  The two separate functions are needed because some
1951 #       conditions should prevent precmd from being run while other things
1952 #       depend on precmd having already been run.
1953 #
1954 check_required_before()
1955 {
1956         local _f
1957
1958         case "$1" in
1959         start)
1960                 for _f in $required_vars; do
1961                         if ! checkyesno $_f; then
1962                                 warn "\$${_f} is not enabled."
1963                                 if [ -z "$rc_force" ]; then
1964                                         return 1
1965                                 fi
1966                         fi
1967                 done
1968
1969                 for _f in $required_dirs; do
1970                         if [ ! -d "${_f}/." ]; then
1971                                 warn "${_f} is not a directory."
1972                                 if [ -z "$rc_force" ]; then
1973                                         return 1
1974                                 fi
1975                         fi
1976                 done
1977
1978                 for _f in $required_files; do
1979                         if [ ! -r "${_f}" ]; then
1980                                 warn "${_f} is not readable."
1981                                 if [ -z "$rc_force" ]; then
1982                                         return 1
1983                                 fi
1984                         fi
1985                 done
1986                 ;;
1987         esac
1988
1989         return 0
1990 }
1991
1992 check_required_after()
1993 {
1994         local _f _args
1995
1996         case "$1" in
1997         start)
1998                 for _f in $required_modules; do
1999                         case "${_f}" in
2000                                 *~*)    _args="-e ${_f#*~} ${_f%%~*}" ;;
2001                                 *:*)    _args="-m ${_f#*:} ${_f%%:*}" ;;
2002                                 *)      _args="${_f}" ;;
2003                         esac
2004                         if ! load_kld ${_args}; then
2005                                 if [ -z "$rc_force" ]; then
2006                                         return 1
2007                                 fi
2008                         fi
2009                 done
2010                 ;;
2011         esac
2012
2013         return 0
2014 }
2015
2016 # check_jail mib
2017 #       Return true if security.jail.$mib exists and set to 1.
2018
2019 check_jail()
2020 {
2021         local _mib _v
2022
2023         _mib=$1
2024         if _v=$(${SYSCTL_N} "security.jail.$_mib" 2> /dev/null); then
2025                 case $_v in
2026                 1)      return 0;;
2027                 esac
2028         fi
2029         return 1
2030 }
2031
2032 # check_kern_features mib
2033 #       Return existence of kern.features.* sysctl MIB as true or
2034 #       false.  The result will be cached in $_rc_cache_kern_features_
2035 #       namespace.  "0" means the kern.features.X exists.
2036
2037 check_kern_features()
2038 {
2039         local _v
2040
2041         [ -n "$1" ] || return 1;
2042         eval _v=\$_rc_cache_kern_features_$1
2043         [ -n "$_v" ] && return "$_v";
2044
2045         if ${SYSCTL_N} kern.features.$1 > /dev/null 2>&1; then
2046                 eval _rc_cache_kern_features_$1=0
2047                 return 0
2048         else
2049                 eval _rc_cache_kern_features_$1=1
2050                 return 1
2051         fi
2052 }
2053
2054 # check_namevarlist var
2055 #       Return "0" if ${name}_var is reserved in rc.subr.
2056
2057 _rc_namevarlist="program chroot chdir env flags fib nice user group groups prepend"
2058 check_namevarlist()
2059 {
2060         local _v
2061
2062         for _v in $_rc_namevarlist; do
2063         case $1 in
2064         $_v)    return 0 ;;
2065         esac
2066         done
2067
2068         return 1
2069 }
2070
2071 # _echoonce var msg mode
2072 #       mode=0: Echo $msg if ${$var} is empty.
2073 #               After doing echo, a string is set to ${$var}.
2074 #
2075 #       mode=1: Echo $msg if ${$var} is a string with non-zero length.
2076 #
2077 _echoonce()
2078 {
2079         local _var _msg _mode
2080         eval _var=\$$1
2081         _msg=$2
2082         _mode=$3
2083
2084         case $_mode in
2085         1)      [ -n "$_var" ] && echo "$_msg" ;;
2086         *)      [ -z "$_var" ] && echo -n "$_msg" && eval "$1=finished" ;;
2087         esac
2088 }
2089
2090 fi # [ -z "${_rc_subr_loaded}" ]
2091
2092 _rc_subr_loaded=: