911 lines
21 KiB
Plaintext
911 lines
21 KiB
Plaintext
# $NetBSD: rc.subr,v 1.67 2006/10/07 11:25:15 elad Exp $
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#
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# Copyright (c) 1997-2004 The NetBSD Foundation, Inc.
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# All rights reserved.
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#
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# This code is derived from software contributed to The NetBSD Foundation
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# by Luke Mewburn.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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# 3. All advertising materials mentioning features or use of this software
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# must display the following acknowledgement:
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# This product includes software developed by the NetBSD
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# Foundation, Inc. and its contributors.
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# 4. Neither the name of The NetBSD Foundation nor the names of its
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# contributors may be used to endorse or promote products derived
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# from this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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# ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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# rc.subr
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# functions used by various rc scripts
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#
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: ${rcvar_manpage:='rc.conf(5)'}
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#
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# functions
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# ---------
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#
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# checkyesno var
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# Test $1 variable, and warn if not set to YES or NO.
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# Return 0 if it's "yes" (et al), nonzero otherwise.
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#
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checkyesno()
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{
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eval _value=\$${1}
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case $_value in
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# "yes", "true", "on", or "1"
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[Yy][Ee][Ss]|[Tt][Rr][Uu][Ee]|[Oo][Nn]|1)
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return 0
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;;
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# "no", "false", "off", or "0"
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[Nn][Oo]|[Ff][Aa][Ll][Ss][Ee]|[Oo][Ff][Ff]|0)
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return 1
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;;
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*)
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warn "\$${1} is not set properly - see ${rcvar_manpage}."
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return 1
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;;
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esac
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}
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#
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# reverse_list list
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# print the list in reverse order
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#
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reverse_list()
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{
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_revlist=
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for _revfile; do
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_revlist="$_revfile $_revlist"
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done
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echo $_revlist
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}
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#
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# mount_critical_filesystems type
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# Go through the list of critical filesystems as provided in
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# the rc.conf(5) variable $critical_filesystems_${type}, checking
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# each one to see if it is mounted, and if it is not, mounting it.
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#
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mount_critical_filesystems()
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{
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eval _fslist=\$critical_filesystems_${1}
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for _fs in $_fslist; do
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mount | (
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_ismounted=false
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while read what _on on _type type; do
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if [ $on = $_fs ]; then
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_ismounted=true
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fi
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done
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if $_ismounted; then
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:
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else
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mount $_fs >/dev/null 2>&1
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fi
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)
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done
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}
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#
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# check_pidfile pidfile procname [interpreter]
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# Parses the first line of pidfile for a PID, and ensures
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# that the process is running and matches procname.
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# Prints the matching PID upon success, nothing otherwise.
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# interpreter is optional; see _find_processes() for details.
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#
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check_pidfile()
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{
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_pidfile=$1
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_procname=$2
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_interpreter=$3
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if [ -z "$_pidfile" -o -z "$_procname" ]; then
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err 3 'USAGE: check_pidfile pidfile procname [interpreter]'
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fi
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if [ ! -f $_pidfile ]; then
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return
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fi
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read _pid _junk < $_pidfile
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if [ -z "$_pid" ]; then
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return
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fi
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_find_processes $_procname ${_interpreter:-.} '-p '"$_pid"
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}
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#
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# check_process procname [interpreter]
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# Ensures that a process (or processes) named procname is running.
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# Prints a list of matching PIDs.
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# interpreter is optional; see _find_processes() for details.
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#
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check_process()
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{
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_procname=$1
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_interpreter=$2
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if [ -z "$_procname" ]; then
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err 3 'USAGE: check_process procname [interpreter]'
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fi
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_find_processes $_procname ${_interpreter:-.} '-ax'
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}
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#
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# _find_processes procname interpreter psargs
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# Search for procname in the output of ps generated by psargs.
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# Prints the PIDs of any matching processes, space separated.
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#
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# If interpreter == ".", check the following variations of procname
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# against the first word of each command:
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# procname
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# `basename procname`
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# `basename procname` + ":"
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# "(" + `basename procname` + ")"
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#
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# If interpreter != ".", read the first line of procname, remove the
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# leading #!, normalise whitespace, append procname, and attempt to
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# match that against each command, either as is, or with extra words
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# at the end. As an alternative, to deal with interpreted deaemons
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# using perl, the basename of the interpreter plus a colon is also
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# tried as the prefix to procname.
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#
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_find_processes()
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{
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if [ $# -ne 3 ]; then
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err 3 'USAGE: _find_processes procname interpreter psargs'
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fi
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_procname=$1
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_interpreter=$2
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_psargs=$3
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_pref=
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if [ $_interpreter != "." ]; then # an interpreted script
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read _interp < ${_chroot:-}/$_procname # read interpreter name
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_interp=${_interp#\#!} # strip #!
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set -- $_interp
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if [ $_interpreter != $1 ]; then
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warn "\$command_interpreter $_interpreter != $1"
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fi
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_interp="$* $_procname" # cleanup spaces, add _procname
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_interpbn=${1##*/}
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_fp_args='_argv'
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_fp_match='case "$_argv" in
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${_interp}|"${_interp} "*|"${_interpbn}: ${_procname}"*)'
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else # a normal daemon
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_procnamebn=${_procname##*/}
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_fp_args='_arg0 _argv'
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_fp_match='case "$_arg0" in
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$_procname|$_procnamebn|${_procnamebn}:|"(${_procnamebn})")'
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fi
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_proccheck='
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ps -o "pid,command" '"$_psargs"' |
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while read _npid '"$_fp_args"'; do
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case "$_npid" in
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PID)
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continue ;;
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esac ; '"$_fp_match"'
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echo -n "$_pref$_npid" ;
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_pref=" "
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;;
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esac
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done'
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#echo 1>&2 "proccheck is :$_proccheck:"
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eval $_proccheck
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}
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#
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# wait_for_pids pid [pid ...]
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# spins until none of the pids exist
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#
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wait_for_pids()
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{
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_list="$@"
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if [ -z "$_list" ]; then
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return
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fi
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_prefix=
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while true; do
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_nlist="";
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for _j in $_list; do
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if kill -0 $_j 2>/dev/null; then
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_nlist="${_nlist}${_nlist:+ }$_j"
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fi
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done
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if [ -z "$_nlist" ]; then
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break
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fi
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_list=$_nlist
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echo -n ${_prefix:-"Waiting for PIDS: "}$_list
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_prefix=", "
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sleep 2
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done
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if [ -n "$_prefix" ]; then
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echo "."
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fi
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}
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#
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# run_rc_command argument
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# Search for argument in the list of supported commands, which is:
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# "start stop restart rcvar status poll ${extra_commands}"
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# If there's a match, run ${argument}_cmd or the default method
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# (see below).
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#
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# If argument has a given prefix, then change the operation as follows:
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# Prefix Operation
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# ------ ---------
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# fast Skip the pid check, and set rc_fast=yes
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# force Set ${rcvar} to YES, and set rc_force=yes
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# one Set ${rcvar} to YES
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#
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# The following globals are used:
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#
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# Name Needed Purpose
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# ---- ------ -------
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# name y Name of script.
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#
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# command n Full path to command.
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# Not needed if ${rc_arg}_cmd is set for
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# each keyword.
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#
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# command_args n Optional args/shell directives for command.
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#
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# command_interpreter n If not empty, command is interpreted, so
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# call check_{pidfile,process}() appropriately.
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#
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# extra_commands n List of extra commands supported.
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#
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# pidfile n If set, use check_pidfile $pidfile $command,
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# otherwise use check_process $command.
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# In either case, only check if $command is set.
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#
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# procname n Process name to check for instead of $command.
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#
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# rcvar n This is checked with checkyesno to determine
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# if the action should be run.
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#
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# ${name}_chroot n Directory to chroot to before running ${command}
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# Requires /usr to be mounted.
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#
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# ${name}_chdir n Directory to cd to before running ${command}
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# (if not using ${name}_chroot).
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#
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# ${name}_flags n Arguments to call ${command} with.
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# NOTE: $flags from the parent environment
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# can be used to override this.
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#
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# ${name}_nice n Nice level to run ${command} at.
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#
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# ${name}_user n User to run ${command} as, using su(1) if not
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# using ${name}_chroot.
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# Requires /usr to be mounted.
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#
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# ${name}_group n Group to run chrooted ${command} as.
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# Requires /usr to be mounted.
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#
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# ${name}_groups n Comma separated list of supplementary groups
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# to run the chrooted ${command} with.
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# Requires /usr to be mounted.
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#
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# ${name}_systrace n Flags passed to systrace(1) if it is used.
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# Setting this variable enables systracing
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# of the given program. The use of "-a" is
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# recommended so that the boot process is not
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# stalled. In order to pass no flags to
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# systrace, set this variable to "--".
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#
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# ${rc_arg}_cmd n If set, use this as the method when invoked;
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# Otherwise, use default command (see below)
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#
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# ${rc_arg}_precmd n If set, run just before performing the
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# ${rc_arg}_cmd method in the default
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# operation (i.e, after checking for required
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# bits and process (non)existence).
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# If this completes with a non-zero exit code,
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# don't run ${rc_arg}_cmd.
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#
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# ${rc_arg}_postcmd n If set, run just after performing the
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# ${rc_arg}_cmd method, if that method
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# returned a zero exit code.
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#
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# required_dirs n If set, check for the existence of the given
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# directories before running the default
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# (re)start command.
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#
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# required_files n If set, check for the readability of the given
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# files before running the default (re)start
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# command.
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#
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# required_vars n If set, perform checkyesno on each of the
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# listed variables before running the default
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# (re)start command.
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#
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# Default behaviour for a given argument, if no override method is
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# provided:
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#
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# Argument Default behaviour
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# -------- -----------------
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# start if !running && checkyesno ${rcvar}
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# ${command}
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#
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# stop if ${pidfile}
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# rc_pid=$(check_pidfile $pidfile $command)
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# else
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# rc_pid=$(check_process $command)
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# kill $sig_stop $rc_pid
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# wait_for_pids $rc_pid
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# ($sig_stop defaults to TERM.)
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#
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# reload Similar to stop, except use $sig_reload instead,
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# and doesn't wait_for_pids.
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# $sig_reload defaults to HUP.
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#
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# restart Run `stop' then `start'.
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#
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# status Show if ${command} is running, etc.
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#
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# poll Wait for ${command} to exit.
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#
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# rcvar Display what rc.conf variable is used (if any).
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#
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# Variables available to methods, and after run_rc_command() has
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# completed:
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#
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# Variable Purpose
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# -------- -------
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# rc_arg Argument to command, after fast/force/one processing
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# performed
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#
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# rc_flags Flags to start the default command with.
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# Defaults to ${name}_flags, unless overridden
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# by $flags from the environment.
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# This variable may be changed by the precmd method.
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#
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# rc_pid PID of command (if appropriate)
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#
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# rc_fast Not empty if "fast" was provided (q.v.)
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#
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# rc_force Not empty if "force" was provided (q.v.)
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#
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#
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run_rc_command()
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{
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rc_arg=$1
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if [ -z "$name" ]; then
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err 3 'run_rc_command: $name is not set.'
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fi
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_rc_prefix=
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case "$rc_arg" in
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fast*) # "fast" prefix; don't check pid
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rc_arg=${rc_arg#fast}
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rc_fast=yes
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;;
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force*) # "force" prefix; always run
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rc_force=yes
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_rc_prefix=force
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rc_arg=${rc_arg#${_rc_prefix}}
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if [ -n "${rcvar}" ]; then
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eval ${rcvar}=YES
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fi
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;;
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one*) # "one" prefix; set ${rcvar}=yes
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_rc_prefix=one
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rc_arg=${rc_arg#${_rc_prefix}}
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if [ -n "${rcvar}" ]; then
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eval ${rcvar}=YES
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fi
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;;
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esac
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_keywords="start stop restart rcvar $extra_commands"
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rc_pid=
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_pidcmd=
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_procname=${procname:-${command}}
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# setup pid check command if not fast
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if [ -z "$rc_fast" -a -n "$_procname" ]; then
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if [ -n "$pidfile" ]; then
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_pidcmd='rc_pid=$(check_pidfile '"$pidfile $_procname $command_interpreter"')'
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else
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_pidcmd='rc_pid=$(check_process '"$_procname $command_interpreter"')'
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fi
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if [ -n "$_pidcmd" ]; then
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_keywords="${_keywords} status poll"
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fi
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fi
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if [ -z "$rc_arg" ]; then
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rc_usage "$_keywords"
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fi
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if [ -n "$flags" ]; then # allow override from environment
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rc_flags=$flags
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else
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eval rc_flags=\$${name}_flags
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fi
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eval _chdir=\$${name}_chdir _chroot=\$${name}_chroot \
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_nice=\$${name}_nice _user=\$${name}_user \
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_group=\$${name}_group _groups=\$${name}_groups \
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_systrace=\$${name}_systrace
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if [ -n "$_user" ]; then # unset $_user if running as that user
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if [ "$_user" = "$(id -un)" ]; then
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unset _user
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fi
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fi
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# if ${rcvar} is set, and $1 is not
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# "rcvar", then run
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# checkyesno ${rcvar}
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# and return if that failed
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#
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if [ -n "${rcvar}" -a "$rc_arg" != "rcvar" ]; then
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if ! checkyesno ${rcvar}; then
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return 0
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fi
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fi
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eval $_pidcmd # determine the pid if necessary
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for _elem in $_keywords; do
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if [ "$_elem" != "$rc_arg" ]; then
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continue
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fi
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# if there's a custom ${XXX_cmd},
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# run that instead of the default
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#
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eval _cmd=\$${rc_arg}_cmd _precmd=\$${rc_arg}_precmd \
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_postcmd=\$${rc_arg}_postcmd
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if [ -n "$_cmd" ]; then
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# if the precmd failed and force
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# isn't set, exit
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#
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if ! eval $_precmd && [ -z "$rc_force" ]; then
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return 1
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fi
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if ! eval $_cmd && [ -z "$rc_force" ]; then
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return 1
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fi
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eval $_postcmd
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return 0
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fi
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case "$rc_arg" in # default operations...
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status)
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if [ -n "$rc_pid" ]; then
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echo "${name} is running as pid $rc_pid."
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else
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echo "${name} is not running."
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return 1
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fi
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;;
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start)
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if [ -n "$rc_pid" ]; then
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echo 1>&2 "${name} already running? (pid=$rc_pid)."
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exit 1
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fi
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if [ ! -x ${_chroot}${command} ]; then
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return 0
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fi
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# check for required variables,
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# directories, and files
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#
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for _f in $required_vars; do
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if ! checkyesno $_f; then
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warn "\$${_f} is not enabled."
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if [ -z "$rc_force" ]; then
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return 1
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fi
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fi
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done
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for _f in $required_dirs; do
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if [ ! -d "${_f}/." ]; then
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warn "${_f} is not a directory."
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if [ -z "$rc_force" ]; then
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return 1
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fi
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fi
|
|
done
|
|
for _f in $required_files; do
|
|
if [ ! -r "${_f}" ]; then
|
|
warn "${_f} is not readable."
|
|
if [ -z "$rc_force" ]; then
|
|
return 1
|
|
fi
|
|
fi
|
|
done
|
|
|
|
# if the precmd failed and force
|
|
# isn't set, exit
|
|
#
|
|
if ! eval $_precmd && [ -z "$rc_force" ]; then
|
|
return 1
|
|
fi
|
|
|
|
# setup the command to run, and run it
|
|
#
|
|
echo "Starting ${name}."
|
|
if [ -n "$_chroot" ]; then
|
|
_doit="\
|
|
${_nice:+nice -n $_nice }\
|
|
${_systrace:+systrace $_systrace }\
|
|
chroot ${_user:+-u $_user }${_group:+-g $_group }${_groups:+-G $_groups }\
|
|
$_chroot $command $rc_flags $command_args"
|
|
else
|
|
_doit="\
|
|
${_chdir:+cd $_chdir; }\
|
|
${_nice:+nice -n $_nice }\
|
|
${_systrace:+systrace $_systrace }\
|
|
$command $rc_flags $command_args"
|
|
if [ -n "$_user" ]; then
|
|
_doit="su -m $_user -c 'sh -c \"$_doit\"'"
|
|
fi
|
|
fi
|
|
|
|
# if the cmd failed and force
|
|
# isn't set, exit
|
|
#
|
|
if ! eval $_doit && [ -z "$rc_force" ]; then
|
|
return 1
|
|
fi
|
|
|
|
# finally, run postcmd
|
|
#
|
|
eval $_postcmd
|
|
;;
|
|
|
|
stop)
|
|
if [ -z "$rc_pid" ]; then
|
|
if [ -n "$pidfile" ]; then
|
|
echo 1>&2 \
|
|
"${name} not running? (check $pidfile)."
|
|
else
|
|
echo 1>&2 "${name} not running?"
|
|
fi
|
|
exit 1
|
|
fi
|
|
|
|
# if the precmd failed and force
|
|
# isn't set, exit
|
|
#
|
|
if ! eval $_precmd && [ -z "$rc_force" ]; then
|
|
return 1
|
|
fi
|
|
|
|
# send the signal to stop
|
|
#
|
|
echo "Stopping ${name}."
|
|
_doit="kill -${sig_stop:-TERM} $rc_pid"
|
|
if [ -n "$_user" ]; then
|
|
_doit="su -m $_user -c 'sh -c \"$_doit\"'"
|
|
fi
|
|
|
|
# if the stop cmd failed and force
|
|
# isn't set, exit
|
|
#
|
|
if ! eval $_doit && [ -z "$rc_force" ]; then
|
|
return 1
|
|
fi
|
|
|
|
# wait for the command to exit,
|
|
# and run postcmd.
|
|
wait_for_pids $rc_pid
|
|
eval $_postcmd
|
|
;;
|
|
|
|
reload)
|
|
if [ -z "$rc_pid" ]; then
|
|
if [ -n "$pidfile" ]; then
|
|
echo 1>&2 \
|
|
"${name} not running? (check $pidfile)."
|
|
else
|
|
echo 1>&2 "${name} not running?"
|
|
fi
|
|
exit 1
|
|
fi
|
|
echo "Reloading ${name} config files."
|
|
if ! eval $_precmd && [ -z "$rc_force" ]; then
|
|
return 1
|
|
fi
|
|
_doit="kill -${sig_reload:-HUP} $rc_pid"
|
|
if [ -n "$_user" ]; then
|
|
_doit="su -m $_user -c 'sh -c \"$_doit\"'"
|
|
fi
|
|
if ! eval $_doit && [ -z "$rc_force" ]; then
|
|
return 1
|
|
fi
|
|
eval $_postcmd
|
|
;;
|
|
|
|
restart)
|
|
if ! eval $_precmd && [ -z "$rc_force" ]; then
|
|
return 1
|
|
fi
|
|
# prevent restart being called more
|
|
# than once by any given script
|
|
#
|
|
if ${_rc_restart_done:-false}; then
|
|
return 0
|
|
fi
|
|
_rc_restart_done=true
|
|
|
|
( $0 ${_rc_prefix}stop )
|
|
$0 ${_rc_prefix}start
|
|
|
|
eval $_postcmd
|
|
;;
|
|
|
|
poll)
|
|
if [ -n "$rc_pid" ]; then
|
|
wait_for_pids $rc_pid
|
|
fi
|
|
;;
|
|
|
|
rcvar)
|
|
echo "# $name"
|
|
if [ -n "$rcvar" ]; then
|
|
if checkyesno ${rcvar}; then
|
|
echo "\$${rcvar}=YES"
|
|
else
|
|
echo "\$${rcvar}=NO"
|
|
fi
|
|
fi
|
|
;;
|
|
|
|
*)
|
|
rc_usage "$_keywords"
|
|
;;
|
|
|
|
esac
|
|
return 0
|
|
done
|
|
|
|
echo 1>&2 "$0: unknown directive '$rc_arg'."
|
|
rc_usage "$_keywords"
|
|
exit 1
|
|
}
|
|
|
|
#
|
|
# run_rc_script file arg
|
|
# Start the script `file' with `arg', and correctly handle the
|
|
# return value from the script. If `file' ends with `.sh', it's
|
|
# sourced into the current environment. If `file' appears to be
|
|
# a backup or scratch file, ignore it. Otherwise if it's
|
|
# executable run as a child process.
|
|
#
|
|
run_rc_script()
|
|
{
|
|
_file=$1
|
|
_arg=$2
|
|
if [ -z "$_file" -o -z "$_arg" ]; then
|
|
err 3 'USAGE: run_rc_script file arg'
|
|
fi
|
|
|
|
unset name command command_args command_interpreter \
|
|
extra_commands pidfile procname \
|
|
rcvar required_dirs required_files required_vars
|
|
eval unset ${_arg}_cmd ${_arg}_precmd ${_arg}_postcmd
|
|
|
|
case "$_file" in
|
|
*.sh) # run in current shell
|
|
set $_arg ; . $_file
|
|
;;
|
|
*[~#]|*.OLD|*.orig|*,v) # scratch file; skip
|
|
warn "Ignoring scratch file $_file"
|
|
;;
|
|
*) # run in subshell
|
|
if [ -x $_file ]; then
|
|
if [ -n "$rc_fast_and_loose" ]; then
|
|
set $_arg ; . $_file
|
|
else
|
|
( set $_arg ; . $_file )
|
|
fi
|
|
fi
|
|
;;
|
|
esac
|
|
}
|
|
|
|
#
|
|
# load_rc_config command
|
|
# Source in the configuration file for a given command.
|
|
#
|
|
load_rc_config()
|
|
{
|
|
_command=$1
|
|
if [ -z "$_command" ]; then
|
|
err 3 'USAGE: load_rc_config command'
|
|
fi
|
|
|
|
if ${_rc_conf_loaded:-false}; then
|
|
:
|
|
else
|
|
. /etc/rc.conf
|
|
_rc_conf_loaded=true
|
|
fi
|
|
if [ -f /etc/rc.conf.d/"$_command" ]; then
|
|
. /etc/rc.conf.d/"$_command"
|
|
fi
|
|
}
|
|
|
|
#
|
|
# load_rc_config_var cmd var
|
|
# Read the rc.conf(5) var for cmd and set in the
|
|
# current shell, using load_rc_config in a subshell to prevent
|
|
# unwanted side effects from other variable assignments.
|
|
#
|
|
load_rc_config_var()
|
|
{
|
|
if [ $# -ne 2 ]; then
|
|
err 3 'USAGE: load_rc_config_var cmd var'
|
|
fi
|
|
eval $(eval '(
|
|
load_rc_config '$1' >/dev/null;
|
|
if [ -n "${'$2'}" -o "${'$2'-UNSET}" != "UNSET" ]; then
|
|
echo '$2'=\'\''${'$2'}\'\'';
|
|
fi
|
|
)' )
|
|
}
|
|
|
|
#
|
|
# rc_usage commands
|
|
# Print a usage string for $0, with `commands' being a list of
|
|
# valid commands.
|
|
#
|
|
rc_usage()
|
|
{
|
|
echo -n 1>&2 "Usage: $0 [fast|force|one]("
|
|
|
|
_sep=
|
|
for _elem; do
|
|
echo -n 1>&2 "$_sep$_elem"
|
|
_sep="|"
|
|
done
|
|
echo 1>&2 ")"
|
|
exit 1
|
|
}
|
|
|
|
#
|
|
# err exitval message
|
|
# Display message to stderr and log to the syslog, and exit with exitval.
|
|
#
|
|
err()
|
|
{
|
|
exitval=$1
|
|
shift
|
|
|
|
if [ -x /usr/bin/logger ]; then
|
|
logger "$0: ERROR: $*"
|
|
fi
|
|
echo 1>&2 "$0: ERROR: $*"
|
|
exit $exitval
|
|
}
|
|
|
|
#
|
|
# warn message
|
|
# Display message to stderr and log to the syslog.
|
|
#
|
|
warn()
|
|
{
|
|
if [ -x /usr/bin/logger ]; then
|
|
logger "$0: WARNING: $*"
|
|
fi
|
|
echo 1>&2 "$0: WARNING: $*"
|
|
}
|
|
|
|
#
|
|
# backup_file action file cur backup
|
|
# Make a backup copy of `file' into `cur', and save the previous
|
|
# version of `cur' as `backup' or use rcs for archiving.
|
|
#
|
|
# This routine checks the value of the backup_uses_rcs variable,
|
|
# which can be either YES or NO.
|
|
#
|
|
# The `action' keyword can be one of the following:
|
|
#
|
|
# add `file' is now being backed up (and is possibly
|
|
# being reentered into the backups system). `cur'
|
|
# is created and RCS files, if necessary, are
|
|
# created as well.
|
|
#
|
|
# update `file' has changed and needs to be backed up.
|
|
# If `cur' exists, it is copied to to `back' or
|
|
# checked into RCS (if the repository file is old),
|
|
# and then `file' is copied to `cur'. Another RCS
|
|
# check in done here if RCS is being used.
|
|
#
|
|
# remove `file' is no longer being tracked by the backups
|
|
# system. If RCS is not being used, `cur' is moved
|
|
# to `back', otherwise an empty file is checked in,
|
|
# and then `cur' is removed.
|
|
#
|
|
#
|
|
backup_file()
|
|
{
|
|
_action=$1
|
|
_file=$2
|
|
_cur=$3
|
|
_back=$4
|
|
|
|
if checkyesno backup_uses_rcs; then
|
|
_msg0="backup archive"
|
|
_msg1="update"
|
|
|
|
# ensure that history file is not locked
|
|
if [ -f $_cur,v ]; then
|
|
rcs -q -u -U -M $_cur
|
|
fi
|
|
|
|
# ensure after switching to rcs that the
|
|
# current backup is not lost
|
|
if [ -f $_cur ]; then
|
|
# no archive, or current newer than archive
|
|
if [ ! -f $_cur,v -o $_cur -nt $_cur,v ]; then
|
|
ci -q -f -u -t-"$_msg0" -m"$_msg1" $_cur
|
|
rcs -q -kb -U $_cur
|
|
co -q -f -u $_cur
|
|
fi
|
|
fi
|
|
|
|
case $_action in
|
|
add|update)
|
|
cp -p $_file $_cur
|
|
ci -q -f -u -t-"$_msg0" -m"$_msg1" $_cur
|
|
rcs -q -kb -U $_cur
|
|
co -q -f -u $_cur
|
|
chown root:wheel $_cur $_cur,v
|
|
;;
|
|
remove)
|
|
cp /dev/null $_cur
|
|
ci -q -f -u -t-"$_msg0" -m"$_msg1" $_cur
|
|
rcs -q -kb -U $_cur
|
|
chown root:wheel $_cur $_cur,v
|
|
rm $_cur
|
|
;;
|
|
esac
|
|
else
|
|
case $_action in
|
|
add|update)
|
|
if [ -f $_cur ]; then
|
|
cp -p $_cur $_back
|
|
fi
|
|
cp -p $_file $_cur
|
|
chown root:wheel $_cur
|
|
;;
|
|
remove)
|
|
mv -f $_cur $_back
|
|
;;
|
|
esac
|
|
fi
|
|
}
|
|
|
|
_rc_subr_loaded=:
|