rc.subr revision 1.55
1# $NetBSD: rc.subr,v 1.55 2003/01/05 22:59:35 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 - see rc.conf(5)." 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=false 95 while read what _on on _type type; do 96 if [ $on = $_fs ]; then 97 _ismounted=true 98 fi 99 done 100 if $_ismounted; then 101 : 102 else 103 mount $_fs >/dev/null 2>&1 104 fi 105 ) 106 done 107} 108 109# 110# check_pidfile pidfile procname [interpreter] 111# Parses the first line of pidfile for a PID, and ensures 112# that the process is running and matches procname. 113# Prints the matching PID upon success, nothing otherwise. 114# interpreter is optional; see _find_processes() for details. 115# 116check_pidfile() 117{ 118 _pidfile=$1 119 _procname=$2 120 _interpreter=$3 121 if [ -z "$_pidfile" -o -z "$_procname" ]; then 122 err 3 'USAGE: check_pidfile pidfile procname [interpreter]' 123 fi 124 if [ ! -f $_pidfile ]; then 125 return 126 fi 127 read _pid _junk < $_pidfile 128 if [ -z "$_pid" ]; then 129 return 130 fi 131 _find_processes $_procname ${_interpreter:-.} '-p '"$_pid" 132} 133 134# 135# check_process procname [interpreter] 136# Ensures that a process (or processes) named procname is running. 137# Prints a list of matching PIDs. 138# interpreter is optional; see _find_processes() for details. 139# 140check_process() 141{ 142 _procname=$1 143 _interpreter=$2 144 if [ -z "$_procname" ]; then 145 err 3 'USAGE: check_process procname [interpreter]' 146 fi 147 _find_processes $_procname ${_interpreter:-.} '-ax' 148} 149 150# 151# _find_processes procname interpreter psargs 152# Search for procname in the output of ps generated by psargs. 153# Prints the PIDs of any matching processes, space separated. 154# 155# If interpreter == ".", check the following variations of procname 156# against the first word of each command: 157# procname 158# `basename procname` 159# `basename procname` + ":" 160# "(" + `basename procname` + ")" 161# 162# If interpreter != ".", read the first line of procname, remove the 163# leading #!, normalise whitespace, append procname, and attempt to 164# match that against each command, either as is, or with extra words 165# at the end. 166# 167_find_processes() 168{ 169 if [ $# -ne 3 ]; then 170 err 3 'USAGE: _find_processes procname interpreter psargs' 171 fi 172 _procname=$1 173 _interpreter=$2 174 _psargs=$3 175 176 _pref= 177 if [ $_interpreter != "." ]; then # an interpreted script 178 read _interp < $_procname # read interpreter name 179 _interp=${_interp#\#!} # strip #! 180 set -- $_interp 181 if [ $_interpreter != $1 ]; then 182 warn "\$command_interpreter $_interpreter != $1" 183 fi 184 _interp="$* $_procname" # cleanup spaces, add _procname 185 _fp_args='_argv' 186 _fp_match='case "$_argv" in 187 ${_interp}|"${_interp} "*)' 188 else # a normal daemon 189 _procnamebn=${_procname##*/} 190 _fp_args='_arg0 _argv' 191 _fp_match='case "$_arg0" in 192 $_procname|$_procnamebn|${_procnamebn}:|"(${_procnamebn})")' 193 fi 194 195 _proccheck=' 196 ps -o "pid,command" '"$_psargs"' | 197 while read _npid '"$_fp_args"'; do 198 case "$_npid" in 199 PID) 200 continue ;; 201 esac ; '"$_fp_match"' 202 echo -n "$_pref$_npid" ; 203 _pref=" " 204 ;; 205 esac 206 done' 207 208#echo 1>&2 "proccheck is :$_proccheck:" 209 eval $_proccheck 210} 211 212# 213# wait_for_pids pid [pid ...] 214# spins until none of the pids exist 215# 216wait_for_pids() 217{ 218 _list=$* 219 if [ -z "$_list" ]; then 220 return 221 fi 222 _prefix= 223 while true; do 224 _nlist=""; 225 for _j in $_list; do 226 if kill -0 $_j 2>/dev/null; then 227 _nlist="${_nlist}${_nlist:+ }$_j" 228 fi 229 done 230 if [ -z "$_nlist" ]; then 231 break 232 fi 233 _list=$_nlist 234 echo -n ${_prefix:-"Waiting for PIDS: "}$_list 235 _prefix=", " 236 sleep 2 237 done 238 if [ -n "$_prefix" ]; then 239 echo "." 240 fi 241} 242 243# 244# run_rc_command argument 245# Search for argument in the list of supported commands, which is: 246# "start stop restart rcvar status poll ${extra_commands}" 247# If there's a match, run ${argument}_cmd or the default method 248# (see below). 249# 250# If argument has a given prefix, then change the operation as follows: 251# Prefix Operation 252# ------ --------- 253# fast Skip the pid check, and set rc_fast=yes 254# force Set ${rcvar} to YES, and set rc_force=yes 255# 256# The following globals are used: 257# 258# Name Needed Purpose 259# ---- ------ ------- 260# name y Name of script. 261# 262# command n Full path to command. 263# Not needed if ${rc_arg}_cmd is set for 264# each keyword. 265# 266# command_args n Optional args/shell directives for command. 267# 268# command_interpreter n If not empty, command is interpreted, so 269# call check_{pidfile,process}() appropriately. 270# 271# extra_commands n List of extra commands supported. 272# 273# pidfile n If set, use check_pidfile $pidfile $command, 274# otherwise use check_process $command. 275# In either case, only check if $command is set. 276# 277# procname n Process name to check for instead of $command. 278# 279# rcvar n This is checked with checkyesno to determine 280# if the action should be run. 281# 282# ${name}_chroot n Directory to chroot to before running ${command} 283# Requires /usr to be mounted. 284# 285# ${name}_chdir n Directory to cd to before running ${command} 286# (if not using ${name}_chroot). 287# 288# ${name}_flags n Arguments to call ${command} with. 289# NOTE: $flags from the parent environment 290# can be used to override this. 291# 292# ${name}_nice n Nice level to run ${command} at. 293# 294# ${name}_user n User to run ${command} as, using su(1) if not 295# using ${name}_chroot. 296# Requires /usr to be mounted. 297# 298# ${name}_group n Group to run chrooted ${command} as. 299# Requires /usr to be mounted. 300# 301# ${name}_groups n Comma separated list of supplementary groups 302# to run the chrooted ${command} with. 303# Requires /usr to be mounted. 304# 305# ${name}_systrace n Flags passed to systrace(1) if it is used. 306# Setting this variable enables systracing 307# of the given program. The use of "-a" is 308# recommended so that the boot process is not 309# stalled. In order to pass no flags to 310# systrace, set this variable to "--". 311# 312# ${rc_arg}_cmd n If set, use this as the method when invoked; 313# Otherwise, use default command (see below) 314# 315# ${rc_arg}_precmd n If set, run just before performing the 316# ${rc_arg}_cmd method in the default 317# operation (i.e, after checking for required 318# bits and process (non)existence). 319# If this completes with a non-zero exit code, 320# don't run ${rc_arg}_cmd. 321# 322# ${rc_arg}_postcmd n If set, run just after performing the 323# ${rc_arg}_cmd method, if that method 324# returned a zero exit code. 325# 326# required_dirs n If set, check for the existence of the given 327# directories before running the default 328# (re)start command. 329# 330# required_files n If set, check for the readability of the given 331# files before running the default (re)start 332# command. 333# 334# required_vars n If set, perform checkyesno on each of the 335# listed variables before running the default 336# (re)start command. 337# 338# Default behaviour for a given argument, if no override method is 339# provided: 340# 341# Argument Default behaviour 342# -------- ----------------- 343# start if !running && checkyesno ${rcvar} 344# ${command} 345# 346# stop if ${pidfile} 347# rc_pid=$(check_pidfile $pidfile $command) 348# else 349# rc_pid=$(check_process $command) 350# kill $sig_stop $rc_pid 351# wait_for_pids $rc_pid 352# ($sig_stop defaults to TERM.) 353# 354# reload Similar to stop, except use $sig_reload instead, 355# and doesn't wait_for_pids. 356# $sig_reload defaults to HUP. 357# 358# restart Run `stop' then `start'. 359# 360# status Show if ${command} is running, etc. 361# 362# poll Wait for ${command} to exit. 363# 364# rcvar Display what rc.conf variable is used (if any). 365# 366# Variables available to methods, and after run_rc_command() has 367# completed: 368# 369# Variable Purpose 370# -------- ------- 371# rc_arg Argument to command, after fast/force processing 372# performed 373# 374# rc_flags Flags to start the default command with. 375# Defaults to ${name}_flags, unless overridden 376# by $flags from the environment. 377# This variable may be changed by the precmd method. 378# 379# rc_pid PID of command (if appropriate) 380# 381# rc_fast Not empty if "fast" was provided (q.v.) 382# 383# rc_force Not empty if "force" was provided (q.v.) 384# 385# 386run_rc_command() 387{ 388 rc_arg=$1 389 if [ -z "$name" ]; then 390 err 3 'run_rc_command: $name is not set.' 391 fi 392 393 case "$rc_arg" in 394 fast*) # "fast" prefix; don't check pid 395 rc_arg=${rc_arg#fast} 396 rc_fast=yes 397 ;; 398 force*) # "force prefix; always start 399 rc_arg=${rc_arg#force} 400 rc_force=yes 401 if [ -n "${rcvar}" ]; then 402 eval ${rcvar}=YES 403 fi 404 ;; 405 esac 406 407 _keywords="start stop restart rcvar $extra_commands" 408 rc_pid= 409 _pidcmd= 410 _procname=${procname:-${command}} 411 412 # setup pid check command if not fast 413 if [ -z "$rc_fast" -a -n "$_procname" ]; then 414 if [ -n "$pidfile" ]; then 415 _pidcmd='rc_pid=$(check_pidfile '"$pidfile $_procname $command_interpreter"')' 416 else 417 _pidcmd='rc_pid=$(check_process '"$_procname $command_interpreter"')' 418 fi 419 if [ -n "$_pidcmd" ]; then 420 _keywords="${_keywords} status poll" 421 fi 422 fi 423 424 if [ -z "$rc_arg" ]; then 425 rc_usage "$_keywords" 426 fi 427 428 if [ -n "$flags" ]; then # allow override from environment 429 rc_flags=$flags 430 else 431 eval rc_flags=\$${name}_flags 432 fi 433 eval _chdir=\$${name}_chdir _chroot=\$${name}_chroot \ 434 _nice=\$${name}_nice _user=\$${name}_user \ 435 _group=\$${name}_group _groups=\$${name}_groups \ 436 _systrace=\$${name}_systrace 437 438 if [ -n "$_user" ]; then # unset $_user if running as that user 439 if [ "$_user" = "$(id -un)" ]; then 440 unset _user 441 fi 442 fi 443 444 # if ${rcvar} is set, and $1 is not 445 # "rcvar", then run 446 # checkyesno ${rcvar} 447 # and return if that failed 448 # 449 if [ -n "${rcvar}" -a "$rc_arg" != "rcvar" ]; then 450 if ! checkyesno ${rcvar}; then 451 return 0 452 fi 453 fi 454 455 eval $_pidcmd # determine the pid if necessary 456 457 for _elem in $_keywords; do 458 if [ "$_elem" != "$rc_arg" ]; then 459 continue 460 fi 461 462 # if there's a custom ${XXX_cmd}, 463 # run that instead of the default 464 # 465 eval _cmd=\$${rc_arg}_cmd _precmd=\$${rc_arg}_precmd \ 466 _postcmd=\$${rc_arg}_postcmd 467 if [ -n "$_cmd" ]; then 468 # if the precmd failed and force 469 # isn't set, exit 470 # 471 if ! eval $_precmd && [ -z "$rc_force" ]; then 472 return 1 473 fi 474 475 if ! eval $_cmd && [ -z "$rc_force" ]; then 476 return 1 477 fi 478 eval $_postcmd 479 return 0 480 fi 481 482 case "$rc_arg" in # default operations... 483 484 status) 485 if [ -n "$rc_pid" ]; then 486 echo "${name} is running as pid $rc_pid." 487 else 488 echo "${name} is not running." 489 return 1 490 fi 491 ;; 492 493 start) 494 if [ -n "$rc_pid" ]; then 495 echo "${name} already running? (pid=$rc_pid)." 496 exit 1 497 fi 498 499 if [ ! -x $command ]; then 500 return 0 501 fi 502 503 # check for required variables, 504 # directories, and files 505 # 506 for _f in $required_vars; do 507 if ! checkyesno $_f; then 508 warn "\$${_f} is not set." 509 if [ -z "$rc_force" ]; then 510 return 1 511 fi 512 fi 513 done 514 for _f in $required_dirs; do 515 if [ ! -d "${_f}/." ]; then 516 warn "${_f} is not a directory." 517 if [ -z "$rc_force" ]; then 518 return 1 519 fi 520 fi 521 done 522 for _f in $required_files; do 523 if [ ! -r "${_f}" ]; then 524 warn "${_f} is not readable." 525 if [ -z "$rc_force" ]; then 526 return 1 527 fi 528 fi 529 done 530 531 # if the precmd failed and force 532 # isn't set, exit 533 # 534 if ! eval $_precmd && [ -z "$rc_force" ]; then 535 return 1 536 fi 537 538 # setup the command to run, and run it 539 # 540 echo "Starting ${name}." 541 if [ -n "$_chroot" ]; then 542 _doit="\ 543${_nice:+nice -n $_nice }\ 544${_systrace:+systrace $_systrace }\ 545chroot ${_user:+-u $_user }${_group:+-g $_group }${_groups:+-G $_groups }\ 546$_chroot $command $rc_flags $command_args" 547 else 548 _doit="\ 549${_chdir:+cd $_chdir; }\ 550${_nice:+nice -n $_nice }\ 551${_systrace:+systrace $_systrace }\ 552$command $rc_flags $command_args" 553 if [ -n "$_user" ]; then 554 _doit="su -m $_user -c 'sh -c \"$_doit\"'" 555 fi 556 fi 557 558 # if the cmd failed and force 559 # isn't set, exit 560 # 561 if ! eval $_doit && [ -z "$rc_force" ]; then 562 return 1 563 fi 564 565 # finally, run postcmd 566 # 567 eval $_postcmd 568 ;; 569 570 stop) 571 if [ -z "$rc_pid" ]; then 572 if [ -n "$pidfile" ]; then 573 echo \ 574 "${name} not running? (check $pidfile)." 575 else 576 echo "${name} not running?" 577 fi 578 exit 1 579 fi 580 581 # if the precmd failed and force 582 # isn't set, exit 583 # 584 if ! eval $_precmd && [ -z "$rc_force" ]; then 585 return 1 586 fi 587 588 # send the signal to stop 589 # 590 echo "Stopping ${name}." 591 _doit="kill -${sig_stop:-TERM} $rc_pid" 592 if [ -n "$_user" ]; then 593 _doit="su -m $_user -c 'sh -c \"$_doit\"'" 594 fi 595 596 # if the stop cmd failed and force 597 # isn't set, exit 598 # 599 if ! eval $_doit && [ -z "$rc_force" ]; then 600 return 1 601 fi 602 603 # wait for the command to exit, 604 # and run postcmd. 605 wait_for_pids $rc_pid 606 eval $_postcmd 607 ;; 608 609 reload) 610 if [ -z "$rc_pid" ]; then 611 if [ -n "$pidfile" ]; then 612 echo \ 613 "${name} not running? (check $pidfile)." 614 else 615 echo "${name} not running?" 616 fi 617 exit 1 618 fi 619 echo "Reloading ${name} config files." 620 if ! eval $_precmd && [ -z "$rc_force" ]; then 621 return 1 622 fi 623 _doit="kill -${sig_reload:-HUP} $rc_pid" 624 if [ -n "$_user" ]; then 625 _doit="su -m $_user -c 'sh -c \"$_doit\"'" 626 fi 627 if ! eval $_doit && [ -z "$rc_force" ]; then 628 return 1 629 fi 630 eval $_postcmd 631 ;; 632 633 restart) 634 if ! eval $_precmd && [ -z "$rc_force" ]; then 635 return 1 636 fi 637 # prevent restart being called more 638 # than once by any given script 639 # 640 if ${_rc_restart_done:-false}; then 641 return 0 642 fi 643 _rc_restart_done=true 644 645 ( $0 ${rc_force:+force}stop ) 646 $0 ${rc_force:+force}start 647 648 eval $_postcmd 649 ;; 650 651 poll) 652 if [ -n "$rc_pid" ]; then 653 wait_for_pids $rc_pid 654 fi 655 ;; 656 657 rcvar) 658 echo "# $name" 659 if [ -n "$rcvar" ]; then 660 if checkyesno ${rcvar}; then 661 echo "\$${rcvar}=YES" 662 else 663 echo "\$${rcvar}=NO" 664 fi 665 fi 666 ;; 667 668 *) 669 rc_usage "$_keywords" 670 ;; 671 672 esac 673 return 0 674 done 675 676 echo 1>&2 "$0: unknown directive '$rc_arg'." 677 rc_usage "$_keywords" 678 exit 1 679} 680 681# 682# run_rc_script file arg 683# Start the script `file' with `arg', and correctly handle the 684# return value from the script. If `file' ends with `.sh', it's 685# sourced into the current environment. If `file' appears to be 686# a backup or scratch file, ignore it. Otherwise if it's 687# executable run as a child process. 688# 689run_rc_script() 690{ 691 _file=$1 692 _arg=$2 693 if [ -z "$_file" -o -z "$_arg" ]; then 694 err 3 'USAGE: run_rc_script file arg' 695 fi 696 697 unset name command command_args command_interpreter \ 698 extra_commands pidfile procname \ 699 rcvar required_dirs required_files required_vars 700 eval unset ${_arg}_cmd ${_arg}_precmd ${_arg}_postcmd 701 702 case "$_file" in 703 *.sh) # run in current shell 704 set $_arg ; . $_file 705 ;; 706 *[~#]|*.OLD|*.orig) # scratch file; skip 707 warn "Ignoring scratch file $_file" 708 ;; 709 *) # run in subshell 710 if [ -x $_file ]; then 711 if [ -n "$rc_fast_and_loose" ]; then 712 set $_arg ; . $_file 713 else 714 ( set $_arg ; . $_file ) 715 fi 716 fi 717 ;; 718 esac 719} 720 721# 722# load_rc_config 723# Source in the configuration file for a given command. 724# 725load_rc_config() 726{ 727 _command=$1 728 if [ -z "$_command" ]; then 729 err 3 'USAGE: load_rc_config command' 730 fi 731 732 if ${_rc_conf_loaded:-false}; then 733 : 734 else 735 . /etc/rc.conf 736 _rc_conf_loaded=true 737 fi 738 if [ -f /etc/rc.conf.d/"$_command" ]; then 739 . /etc/rc.conf.d/"$_command" 740 fi 741} 742 743 744# 745# rc_usage commands 746# Print a usage string for $0, with `commands' being a list of 747# valid commands. 748# 749rc_usage() 750{ 751 echo -n 1>&2 "Usage: $0 [fast|force](" 752 753 _sep= 754 for _elem in $*; do 755 echo -n 1>&2 "$_sep$_elem" 756 _sep="|" 757 done 758 echo 1>&2 ")" 759 exit 1 760} 761 762# 763# err exitval message 764# Display message to stderr and log to the syslog, and exit with exitval. 765# 766err() 767{ 768 exitval=$1 769 shift 770 771 if [ -x /usr/bin/logger ]; then 772 logger "$0: ERROR: $*" 773 fi 774 echo 1>&2 "$0: ERROR: $*" 775 exit $exitval 776} 777 778# 779# warn message 780# Display message to stderr and log to the syslog. 781# 782warn() 783{ 784 if [ -x /usr/bin/logger ]; then 785 logger "$0: WARNING: $*" 786 fi 787 echo 1>&2 "$0: WARNING: $*" 788} 789 790# 791# backup_file action file cur backup 792# Make a backup copy of `file' into `cur', and save the previous 793# version of `cur' as `backup' or use rcs for archiving. 794# 795# This routine checks the value of the backup_uses_rcs variable, 796# which can be either YES or NO. 797# 798# The `action' keyword can be one of the following: 799# 800# add `file' is now being backed up (and is possibly 801# being reentered into the backups system). `cur' 802# is created and RCS files, if necessary, are 803# created as well. 804# 805# update `file' has changed and needs to be backed up. 806# If `cur' exists, it is copied to to `back' or 807# checked into RCS (if the repository file is old), 808# and then `file' is copied to `cur'. Another RCS 809# check in done here if RCS is being used. 810# 811# remove `file' is no longer being tracked by the backups 812# system. If RCS is not being used, `cur' is moved 813# to `back', otherwise an empty file is checked in, 814# and then `cur' is removed. 815# 816# 817backup_file() 818{ 819 _action=$1 820 _file=$2 821 _cur=$3 822 _back=$4 823 824 if checkyesno backup_uses_rcs; then 825 _msg0="backup archive" 826 _msg1="update" 827 828 # ensure that history file is not locked 829 if [ -f $_cur,v ]; then 830 rcs -q -u -U -M $_cur 831 fi 832 833 # ensure after switching to rcs that the 834 # current backup is not lost 835 if [ -f $_cur ]; then 836 # no archive, or current newer than archive 837 if [ ! -f $_cur,v -o $_cur -nt $_cur,v ]; then 838 ci -q -f -u -t-"$_msg0" -m"$_msg1" $_cur 839 rcs -q -kb -U $_cur 840 co -q -f -u $_cur 841 fi 842 fi 843 844 case $_action in 845 add|update) 846 cp -p $_file $_cur 847 ci -q -f -u -t-"$_msg0" -m"$_msg1" $_cur 848 rcs -q -kb -U $_cur 849 co -q -f -u $_cur 850 chown root:wheel $_cur $_cur,v 851 ;; 852 remove) 853 cp /dev/null $_cur 854 ci -q -f -u -t-"$_msg0" -m"$_msg1" $_cur 855 rcs -q -kb -U $_cur 856 chown root:wheel $_cur $_cur,v 857 rm $_cur 858 ;; 859 esac 860 else 861 case $_action in 862 add|update) 863 if [ -f $_cur ]; then 864 cp -p $_cur $_back 865 fi 866 cp -p $_file $_cur 867 chown root:wheel $_cur 868 ;; 869 remove) 870 mv -f $_cur $_back 871 ;; 872 esac 873 fi 874} 875