rc.subr revision 1.47
1# $NetBSD: rc.subr,v 1.47 2002/03/27 08:53:42 lukem Exp $ 2# 3# Copyright (c) 1997-2002 The NetBSD Foundation, Inc. 4# All rights reserved. 5# 6# This code is derived from software contributed to The NetBSD Foundation 7# by Luke Mewburn. 8# 9# Redistribution and use in source and binary forms, with or without 10# modification, are permitted provided that the following conditions 11# are met: 12# 1. Redistributions of source code must retain the above copyright 13# notice, this list of conditions and the following disclaimer. 14# 2. Redistributions in binary form must reproduce the above copyright 15# notice, this list of conditions and the following disclaimer in the 16# documentation and/or other materials provided with the distribution. 17# 3. All advertising materials mentioning features or use of this software 18# must display the following acknowledgement: 19# This product includes software developed by the NetBSD 20# Foundation, Inc. and its contributors. 21# 4. Neither the name of The NetBSD Foundation nor the names of its 22# contributors may be used to endorse or promote products derived 23# from this software without specific prior written permission. 24# 25# THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 26# ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 29# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35# POSSIBILITY OF SUCH DAMAGE. 36# 37# rc.subr 38# functions used by various rc scripts 39# 40 41# 42# functions 43# --------- 44 45# 46# checkyesno var 47# Test $1 variable, and warn if not set to YES or NO. 48# Return 0 if it's "yes" (et al), nonzero otherwise. 49# 50checkyesno() 51{ 52 eval _value=\$${1} 53 case $_value in 54 55 # "yes", "true", "on", or "1" 56 [Yy][Ee][Ss]|[Tt][Rr][Uu][Ee]|[Oo][Nn]|1) 57 return 0 58 ;; 59 60 # "no", "false", "off", or "0" 61 [Nn][Oo]|[Ff][Aa][Ll][Ss][Ee]|[Oo][Ff][Ff]|0) 62 return 1 63 ;; 64 *) 65 warn "\$${1} is not set properly." 66 return 1 67 ;; 68 esac 69} 70 71# reverse_list list 72# print the list in reverse order 73# 74reverse_list() 75{ 76 _revlist= 77 for _revfile in $*; do 78 _revlist="$_revfile $_revlist" 79 done 80 echo $_revlist 81} 82 83# 84# mount_critical_filesystems type 85# Go through the list of critical filesystems as provided in 86# the rc.conf(5) variable $critical_filesystems_${type}, checking 87# each one to see if it is mounted, and if it is not, mounting it. 88# 89mount_critical_filesystems() 90{ 91 eval _fslist=\$critical_filesystems_${1} 92 for _fs in $_fslist; do 93 mount | ( 94 _ismounted=no 95 while read what _on on _type type; do 96 if [ $on = $_fs ]; then 97 _ismounted=yes 98 fi 99 done 100 if [ $_ismounted = no ]; then 101 mount $_fs >/dev/null 2>&1 102 fi 103 ) 104 done 105} 106 107# 108# check_pidfile pidfile procname [interpreter] 109# Parses the first line of pidfile for a PID, and ensures 110# that the process is running and matches procname. 111# Prints the matching PID upon success, nothing otherwise. 112# interpreter is optional; see _find_processes() for details. 113# 114check_pidfile() 115{ 116 _pidfile=$1 117 _procname=$2 118 _interpreter=$3 119 if [ -z "$_pidfile" -o -z "$_procname" ]; then 120 err 3 'USAGE: check_pidfile pidfile procname [interpreter]' 121 fi 122 if [ ! -f $_pidfile ]; then 123 return 124 fi 125 read _pid _junk < $_pidfile 126 if [ -z "$_pid" ]; then 127 return 128 fi 129 _find_processes $_procname ${_interpreter:-.} '-p '"$_pid" 130} 131 132# 133# check_process procname [interpreter] 134# Ensures that a process (or processes) named procname is running. 135# Prints a list of matching PIDs. 136# interpreter is optional; see _find_processes() for details. 137# 138check_process() 139{ 140 _procname=$1 141 _interpreter=$2 142 if [ -z "$_procname" ]; then 143 err 3 'USAGE: check_process procname [interpreter]' 144 fi 145 _find_processes $_procname ${_interpreter:-.} '-ax' 146} 147 148# 149# _find_processes procname interpreter psargs 150# Search for procname in the output of ps generated by psargs. 151# Prints the PIDs of any matching processes, space separated. 152# 153# If interpreter == ".", check the following variations of procname 154# against the first word of each command: 155# procname 156# `basename procname` 157# `basename procname` + ":" 158# "(" + `basename procname` + ")" 159# 160# If interpreter != ".", read the first line of procname, remove the 161# leading #!, normalise whitespace, append procname, and attempt to 162# match that against each command, either as is, or with extra words 163# at the end. 164# 165_find_processes() 166{ 167 if [ $# -ne 3 ]; then 168 err 3 'USAGE: _find_processes procname interpreter psargs' 169 fi 170 _procname=$1 171 _interpreter=$2 172 _psargs=$3 173 174 _pref= 175 if [ $_interpreter != "." ]; then # an interpreted script 176 read _interp < $_procname # read interpreter name 177 _interp=${_interp#\#!} # strip #! 178 set -- $_interp 179 if [ $_interpreter != $1 ]; then 180 warn "\$command_interpreter $_interpreter != $1" 181 fi 182 _interp="$* $_procname" # cleanup spaces, add _procname 183 _fp_args='_argv' 184 _fp_match='case "$_argv" in 185 ${_interp}|"${_interp} "*)' 186 else # a normal daemon 187 _procnamebn=${_procname##*/} 188 _fp_args='_arg0 _argv' 189 _fp_match='case "$_arg0" in 190 $_procname|$_procnamebn|${_procnamebn}:|"(${_procnamebn})")' 191 fi 192 193 _proccheck=' 194 ps -o "pid,command" '"$_psargs"' | 195 while read _npid '"$_fp_args"'; do 196 case "$_npid" in 197 PID) 198 continue ;; 199 esac ; '"$_fp_match"' 200 echo -n "$_pref$_npid" ; 201 _pref=" " 202 ;; 203 esac 204 done' 205 206#echo 1>&2 "proccheck is :$_proccheck:" 207 eval $_proccheck 208} 209 210# 211# wait_for_pids pid [pid ...] 212# spins until none of the pids exist 213# 214wait_for_pids() 215{ 216 _list=$* 217 if [ -z "$_list" ]; then 218 return 219 fi 220 _prefix= 221 while true; do 222 _nlist=""; 223 for _j in $_list; do 224 if kill -0 $_j 2>/dev/null; then 225 _nlist="${_nlist}${_nlist:+ }$_j" 226 fi 227 done 228 if [ -z "$_nlist" ]; then 229 break 230 fi 231 _list=$_nlist 232 echo -n ${_prefix:-"Waiting for PIDS: "}$_list 233 _prefix=", " 234 sleep 2 235 done 236 if [ -n "$_prefix" ]; then 237 echo "." 238 fi 239} 240 241# 242# run_rc_command argument 243# Search for argument in the list of supported commands, which is: 244# "start stop restart rcvar status poll ${extra_commands}" 245# If there's a match, run ${argument}_cmd or the default method 246# (see below). 247# 248# If argument has a given prefix, then change the operation as follows: 249# Prefix Operation 250# ------ --------- 251# fast Skip the pid check, and set rc_fast=YES 252# force Set ${rcvar} to YES, and set rc_force=YES. 253# 254# The following globals are used: 255# 256# Name Needed Purpose 257# ---- ------ ------- 258# name y Name of script. 259# 260# command n Full path to command. 261# Not needed if ${rc_arg}_cmd is set for 262# each keyword. 263# 264# command_args n Optional args/shell directives for command. 265# 266# command_interpreter n If not empty, command is interpreted, so 267# call check_{pidfile,process}() appropriately. 268# 269# extra_commands n List of extra commands supported. 270# 271# pidfile n If set, use check_pidfile $pidfile $command, 272# otherwise use check_process $command. 273# In either case, only check if $command is set. 274# 275# procname n Process name to check for instead of $command. 276# 277# rcvar n This is checked with checkyesno to determine 278# if the action should be run. 279# 280# ${name}_chroot n Directory to chroot to before running ${command} 281# Requires /usr to be mounted. 282# 283# ${name}_chdir n Directory to cd to before running ${command} 284# (if not using ${name}_chroot). 285# 286# ${name}_flags n Arguments to call ${command} with. 287# NOTE: $flags from the parent environment 288# can be used to override this. 289# 290# ${name}_nice n Nice level to run ${command} at. 291# 292# ${name}_user n User to run ${command} as, using su(1) if not 293# using ${name}_chroot. 294# Requires /usr to be mounted. 295# 296# ${name}_group n Group to run chrooted ${command} as. 297# Requires /usr to be mounted. 298# 299# ${name}_groups n Comma separated list of supplementary groups 300# to run the chrooted ${command} with. 301# Requires /usr to be mounted. 302# 303# ${rc_arg}_cmd n If set, use this as the method when invoked; 304# Otherwise, use default command (see below) 305# 306# ${rc_arg}_precmd n If set, run just before performing the 307# ${rc_arg}_cmd method in the default 308# operation (i.e, after checking for required 309# bits and process (non)existence). 310# If this completes with a non-zero exit code, 311# don't run ${rc_arg}_cmd. 312# 313# ${rc_arg}_postcmd n If set, run just after performing the 314# ${rc_arg}_cmd method, if that method 315# returned a zero exit code. 316# 317# required_dirs n If set, check for the existence of the given 318# directories before running the default 319# (re)start command. 320# 321# required_files n If set, check for the readability of the given 322# files before running the default (re)start 323# command. 324# 325# required_vars n If set, perform checkyesno on each of the 326# listed variables before running the default 327# (re)start command. 328# 329# Default behaviour for a given argument, if no override method is 330# provided: 331# 332# Argument Default behaviour 333# -------- ----------------- 334# start if !running && checkyesno ${rcvar} 335# ${command} 336# 337# stop if ${pidfile} 338# rc_pid=$(check_pidfile $pidfile $command) 339# else 340# rc_pid=$(check_process $command) 341# kill $sig_stop $rc_pid 342# wait_for_pids $rc_pid 343# ($sig_stop defaults to TERM.) 344# 345# reload Similar to stop, except use $sig_reload instead, 346# and doesn't wait_for_pids. 347# $sig_reload defaults to HUP. 348# 349# restart Run `stop' then `start'. 350# 351# status Show if ${command} is running, etc. 352# 353# poll Wait for ${command} to exit. 354# 355# rcvar Display what rc.conf variable is used (if any). 356# 357# Variables available to methods, and after run_rc_command() has 358# completed: 359# 360# Variable Purpose 361# -------- ------- 362# rc_arg Argument to command, after fast/force processing 363# performed 364# 365# rc_flags Flags to start the default command with. 366# Defaults to ${name}_flags, unless overridden 367# by $flags from the environment. 368# This variable may be changed by the precmd method. 369# 370# rc_pid PID of command (if appropriate) 371# 372# rc_fast Not empty if "fast" was provided (q.v.) 373# 374# rc_force Not empty if "force" was provided (q.v.) 375# 376# 377run_rc_command() 378{ 379 rc_arg=$1 380 if [ -z "$name" ]; then 381 err 3 'run_rc_command: $name is not set.' 382 fi 383 384 case "$rc_arg" in 385 fast*) # "fast" prefix; don't check pid 386 rc_arg=${rc_arg#fast} 387 rc_fast=YES 388 ;; 389 force*) # "force prefix; always start 390 rc_arg=${rc_arg#force} 391 rc_force=YES 392 if [ -n "${rcvar}" ]; then 393 eval ${rcvar}=YES 394 fi 395 ;; 396 esac 397 398 _keywords="start stop restart rcvar $extra_commands" 399 rc_pid= 400 _pidcmd= 401 _procname=${procname:-${command}} 402 403 # setup pid check command if not fast 404 if [ -z "$rc_fast" -a -n "$_procname" ]; then 405 if [ -n "$pidfile" ]; then 406 _pidcmd='rc_pid=$(check_pidfile '"$pidfile $_procname $command_interpreter"')' 407 else 408 _pidcmd='rc_pid=$(check_process '"$_procname $command_interpreter"')' 409 fi 410 if [ -n "$_pidcmd" ]; then 411 _keywords="${_keywords} status poll" 412 fi 413 fi 414 415 if [ -z "$rc_arg" ]; then 416 rc_usage "$_keywords" 417 fi 418 419 if [ -n "$flags" ]; then # allow override from environment 420 rc_flags=$flags 421 else 422 eval rc_flags=\$${name}_flags 423 fi 424 eval _chdir=\$${name}_chdir _chroot=\$${name}_chroot \ 425 _nice=\$${name}_nice _user=\$${name}_user \ 426 _group=\$${name}_group _groups=\$${name}_groups 427 428 if [ -n "$_user" ]; then # unset $_user if running as that user 429 if [ "$_user" = "$(id -un)" ]; then 430 unset _user 431 fi 432 fi 433 434 # if ${rcvar} is set, and $1 is not 435 # "rcvar", then run 436 # checkyesno ${rcvar} 437 # and return if that failed 438 # 439 if [ -n "${rcvar}" -a "$rc_arg" != "rcvar" ]; then 440 if ! checkyesno ${rcvar}; then 441 return 0 442 fi 443 fi 444 445 eval $_pidcmd # determine the pid if necessary 446 447 for _elem in $_keywords; do 448 if [ "$_elem" != "$rc_arg" ]; then 449 continue 450 fi 451 452 # if there's a custom ${XXX_cmd}, 453 # run that instead of the default 454 # 455 eval _cmd=\$${rc_arg}_cmd _precmd=\$${rc_arg}_precmd \ 456 _postcmd=\$${rc_arg}_postcmd 457 if [ -n "$_cmd" ]; then 458 # if the precmd failed and force 459 # isn't set, exit 460 # 461 if ! eval $_precmd && [ -z "$rc_force" ]; then 462 return 1 463 fi 464 465 if ! eval $_cmd && [ -z "$rc_force" ]; then 466 return 1 467 fi 468 eval $_postcmd 469 return 0 470 fi 471 472 case "$rc_arg" in # default operations... 473 474 status) 475 if [ -n "$rc_pid" ]; then 476 echo "${name} is running as pid $rc_pid." 477 else 478 echo "${name} is not running." 479 return 1 480 fi 481 ;; 482 483 start) 484 if [ -n "$rc_pid" ]; then 485 echo "${name} already running? (pid=$rc_pid)." 486 exit 1 487 fi 488 489 if [ ! -x $command ]; then 490 return 0 491 fi 492 493 # check for required variables, 494 # directories, and files 495 # 496 for _f in $required_vars; do 497 if ! checkyesno $_f; then 498 warn "\$${_f} is not set." 499 if [ -z "$rc_force" ]; then 500 return 1 501 fi 502 fi 503 done 504 for _f in $required_dirs; do 505 if [ ! -d "${_f}/." ]; then 506 warn "${_f} is not a directory." 507 if [ -z "$rc_force" ]; then 508 return 1 509 fi 510 fi 511 done 512 for _f in $required_files; do 513 if [ ! -r "${_f}" ]; then 514 warn "${_f} is not readable." 515 if [ -z "$rc_force" ]; then 516 return 1 517 fi 518 fi 519 done 520 521 # if the precmd failed and force 522 # isn't set, exit 523 # 524 if ! eval $_precmd && [ -z "$rc_force" ]; then 525 return 1 526 fi 527 528 # setup the command to run, and run it 529 # 530 echo "Starting ${name}." 531 if [ -n "$_chroot" ]; then 532 _doit="\ 533${_nice:+nice -n $_nice }\ 534chroot ${_user:+-u $_user }${_group:+-g $_group }${_groups:+-G $_groups }\ 535$_chroot $command $rc_flags $command_args" 536 else 537 _doit="\ 538${_chdir:+cd $_chdir; }\ 539${_nice:+nice -n $_nice }\ 540$command $rc_flags $command_args" 541 if [ -n "$_user" ]; then 542 _doit="su -m $_user -c 'sh -c \"$_doit\"'" 543 fi 544 fi 545 546 # if the cmd failed and force 547 # isn't set, exit 548 # 549 if ! eval $_doit && [ -z "$rc_force" ]; then 550 return 1 551 fi 552 553 # finally, run postcmd 554 # 555 eval $_postcmd 556 ;; 557 558 stop) 559 if [ -z "$rc_pid" ]; then 560 if [ -n "$pidfile" ]; then 561 echo \ 562 "${name} not running? (check $pidfile)." 563 else 564 echo "${name} not running?" 565 fi 566 exit 1 567 fi 568 569 # if the precmd failed and force 570 # isn't set, exit 571 # 572 if ! eval $_precmd && [ -z "$rc_force" ]; then 573 return 1 574 fi 575 576 # send the signal to stop 577 # 578 echo "Stopping ${name}." 579 _doit="kill -${sig_stop:-TERM} $rc_pid" 580 if [ -n "$_user" ]; then 581 _doit="su -m $_user -c 'sh -c \"$_doit\"'" 582 fi 583 584 # if the stop cmd failed and force 585 # isn't set, exit 586 # 587 if ! eval $_doit && [ -z "$rc_force" ]; then 588 return 1 589 fi 590 591 # wait for the command to exit, 592 # and run postcmd. 593 wait_for_pids $rc_pid 594 eval $_postcmd 595 ;; 596 597 reload) 598 if [ -z "$rc_pid" ]; then 599 if [ -n "$pidfile" ]; then 600 echo \ 601 "${name} not running? (check $pidfile)." 602 else 603 echo "${name} not running?" 604 fi 605 exit 1 606 fi 607 echo "Reloading ${name} config files." 608 if ! eval $_precmd && [ -z "$rc_force" ]; then 609 return 1 610 fi 611 _doit="kill -${sig_reload:-HUP} $rc_pid" 612 if [ -n "$_user" ]; then 613 _doit="su -m $_user -c 'sh -c \"$_doit\"'" 614 fi 615 if ! eval $_doit && [ -z "$rc_force" ]; then 616 return 1 617 fi 618 eval $_postcmd 619 ;; 620 621 restart) 622 if ! eval $_precmd && [ -z "$rc_force" ]; then 623 return 1 624 fi 625 # prevent restart being called more 626 # than once by any given script 627 # 628 if [ -n "$_rc_restart_done" ]; then 629 return 0 630 fi 631 _rc_restart_done=YES 632 633 ( $0 ${rc_force:+force}stop ) 634 $0 ${rc_force:+force}start 635 636 eval $_postcmd 637 ;; 638 639 poll) 640 if [ -n "$rc_pid" ]; then 641 wait_for_pids $rc_pid 642 fi 643 ;; 644 645 rcvar) 646 echo "# $name" 647 if [ -n "$rcvar" ]; then 648 if checkyesno ${rcvar}; then 649 echo "\$${rcvar}=YES" 650 else 651 echo "\$${rcvar}=NO" 652 fi 653 fi 654 ;; 655 656 *) 657 rc_usage "$_keywords" 658 ;; 659 660 esac 661 return 0 662 done 663 664 echo 1>&2 "$0: unknown directive '$rc_arg'." 665 rc_usage "$_keywords" 666 exit 1 667} 668 669# 670# run_rc_script file arg 671# Start the script `file' with `arg', and correctly handle the 672# return value from the script. If `file' ends with `.sh', it's 673# sourced into the current environment. If `file' appears to be 674# a backup or scratch file, ignore it. Otherwise if it's 675# executable run as a child process. 676# 677run_rc_script() 678{ 679 _file=$1 680 _arg=$2 681 if [ -z "$_file" -o -z "$_arg" ]; then 682 err 3 'USAGE: run_rc_script file arg' 683 fi 684 685 unset name command command_args command_interpreter \ 686 extra_commands pidfile procname \ 687 rcvar required_dirs required_files required_vars 688 eval unset ${_arg}_cmd ${_arg}_precmd ${_arg}_postcmd 689 690 case "$_file" in 691 *.sh) # run in current shell 692 set $_arg ; . $_file 693 ;; 694 *[~#]|*.OLD|*.orig) # scratch file; skip 695 warn "Ignoring scratch file $_file" 696 ;; 697 *) # run in subshell 698 if [ -x $_file ]; then 699 if [ -n "$rc_fast_and_loose" ]; then 700 set $_arg ; . $_file 701 else 702 ( set $_arg ; . $_file ) 703 fi 704 fi 705 ;; 706 esac 707} 708 709# 710# load_rc_config 711# Source in the configuration file for a given command. 712# 713load_rc_config() 714{ 715 _command=$1 716 if [ -z "$_command" ]; then 717 err 3 'USAGE: load_rc_config command' 718 fi 719 720 if [ -z "$_rc_conf_loaded" ]; then 721 . /etc/rc.conf 722 _rc_conf_loaded=YES 723 fi 724 if [ -f /etc/rc.conf.d/"$_command" ]; then 725 . /etc/rc.conf.d/"$_command" 726 fi 727} 728 729 730# 731# rc_usage commands 732# Print a usage string for $0, with `commands' being a list of 733# valid commands. 734# 735rc_usage() 736{ 737 echo -n 1>&2 "Usage: $0 [fast|force](" 738 739 _sep= 740 for _elem in $*; do 741 echo -n 1>&2 "$_sep$_elem" 742 _sep="|" 743 done 744 echo 1>&2 ")" 745 exit 1 746} 747 748# 749# err exitval message 750# Display message to stderr and log to the syslog, and exit with exitval. 751# 752err() 753{ 754 exitval=$1 755 shift 756 757 logger "$0: ERROR: $*" 758 echo 1>&2 "$0: ERROR: $*" 759 exit $exitval 760} 761 762# 763# warn message 764# Display message to stderr and log to the syslog. 765# 766warn() 767{ 768 logger "$0: WARNING: $*" 769 echo 1>&2 "$0: WARNING: $*" 770} 771 772# 773# backup_file action file cur backup 774# Make a backup copy of `file' into `cur', and save the previous 775# version of `cur' as `backup' or use rcs for archiving. 776# 777# This routine checks the value of the backup_uses_rcs variable, 778# which can be either YES or NO. 779# 780# The `action' keyword can be one of the following: 781# 782# add `file' is now being backed up (and is possibly 783# being reentered into the backups system). `cur' 784# is created and RCS files, if necessary, are 785# created as well. 786# 787# update `file' has changed and needs to be backed up. 788# If `cur' exists, it is copied to to `back' or 789# checked into RCS (if the repository file is old), 790# and then `file' is copied to `cur'. Another RCS 791# check in done here if RCS is being used. 792# 793# remove `file' is no longer being tracked by the backups 794# system. If RCS is not being used, `cur' is moved 795# to `back', otherwise an empty file is checked in, 796# and then `cur' is removed. 797# 798# 799backup_file() 800{ 801 _action=$1 802 _file=$2 803 _cur=$3 804 _back=$4 805 806 if checkyesno backup_uses_rcs; then 807 _msg0="backup archive" 808 _msg1="update" 809 810 # ensure that history file is not locked 811 if [ -f $_cur,v ]; then 812 rcs -q -u -U -M $_cur 813 fi 814 815 # ensure after switching to rcs that the 816 # current backup is not lost 817 if [ -f $_cur ]; then 818 # no archive, or current newer than archive 819 if [ ! -f $_cur,v -o $_cur -nt $_cur,v ]; then 820 ci -q -f -u -t-"$_msg0" -m"$_msg1" $_cur 821 rcs -q -kb -U $_cur 822 fi 823 fi 824 825 case $_action in 826 add|update) 827 cp -p $_file $_cur 828 ci -q -f -u -t-"$_msg0" -m"$_msg1" $_cur 829 rcs -q -kb -U $_cur 830 chown root:wheel $_cur $_cur,v 831 ;; 832 remove) 833 cp /dev/null $_cur 834 ci -q -f -u -t-"$_msg0" -m"$_msg1" $_cur 835 rcs -q -kb -U $_cur 836 chown root:wheel $_cur $_cur,v 837 rm $_cur 838 ;; 839 esac 840 else 841 case $_action in 842 add|update) 843 if [ -f $_cur ]; then 844 cp -p $_cur $_back 845 fi 846 cp -p $_file $_cur 847 chown root:wheel $_cur 848 ;; 849 remove) 850 mv -f $_cur $_back 851 ;; 852 esac 853 fi 854} 855