747 lines
17 KiB
Plaintext
747 lines
17 KiB
Plaintext
# $NetBSD: rc.subr,v 1.38 2001/11/19 03:18:32 lukem Exp $
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#
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# Copyright (c) 1997-2000 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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#
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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."
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return 1
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;;
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esac
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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 in $*; do
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_revlist="$_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
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# Go through the list of critical filesystems, checking each one
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# 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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if [ $1 = local ]; then
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_fslist=$critical_filesystems_beforenet
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else
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_fslist=$critical_filesystems
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fi
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for _fs in $_fslist; do
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mount | (
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_ismounted=no
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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=yes
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fi
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done
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if [ $_ismounted = no ]; then
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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
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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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#
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check_pidfile()
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{
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_pidfile=$1
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_procname=$2
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if [ -z "$_pidfile" -o -z "$_procname" ]; then
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err 3 'USAGE: check_pidfile pidfile procname'
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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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_procnamebn=${_procname##*/}
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ps -p $_pid -o 'pid,command' | while read _npid _arg0 _argv; do
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case "$_npid" in
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PID)
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continue ;;
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esac
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case "$_arg0" in
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$_procname|$_procnamebn|${_procnamebn}:|"(${_procnamebn})")
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echo $_npid
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return
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;;
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esac
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done
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}
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#
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# check_process procname
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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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#
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check_process()
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{
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_procname=$1
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if [ -z "$_procname" ]; then
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err 3 'USAGE: check_process procname'
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fi
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_procnamebn=${_procname##*/}
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_pref=
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ps -ax -o 'pid,command' | while read _npid _arg0 _argv; do
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case "$_npid" in
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PID)
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continue ;;
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esac
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case "$_arg0" in
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$_procname|$_procnamebn|${_procnamebn}:|"(${_procnamebn})")
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echo -n "$_pref$_npid"
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_pref=" "
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;;
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esac
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done
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}
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#
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# wait_for_pids pid [pid ...]
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# spins until none of the pids exist
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#
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wait_for_pids()
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{
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_list=$*
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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 arg
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# Search for arg 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 ${arg}_cmd or the default command (see below).
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#
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# If arg 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.
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# force 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 function
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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 ${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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# extra_commands n List of extra commands supported.
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#
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# pidfile n If set, use check_pidfile $pidfile, else if
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# $command is set, use check_process $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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#
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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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#
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# ${name}_group n Group to run chrooted ${command} as.
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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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#
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# ${_arg}_cmd n If set, use this as the action when invoked;
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# $_arg is available to the action to use.
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# Otherwise, use default command (see below)
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#
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# ${_arg}_precmd n If set, run just before performing the main
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# action in the default command (i.e, after
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# checking for required bits and process
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# (non)existance).
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# If this completes with a non-zero exit code,
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# don't run ${_arg}_cmd.
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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 commands for a given arg:
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#
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# arg default
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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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# _pid=`check_pidfile $pidfile`
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# else
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# _pid=`check_process $command`
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# kill $sig_stop $_pid
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# wait_for_pids $_pid
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# ($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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#
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#
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run_rc_command()
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{
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_arg=$1
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if [ -z "$name" ]; then
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err 3 'run_rc_command: $name is not set.'
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fi
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case "$_arg" in
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fast*) # "fast" prefix; don't check pid
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_arg=${_arg#fast}
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_rc_fast_run=YES
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;;
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force*) # "force prefix; always start
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_arg=${_arg#force}
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_rc_force_run=YES
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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 $extra_commands"
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_pid=
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_pidcmd=
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# setup pid check command if not fast
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if [ -z "$_rc_fast_run" ]; then
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if [ -n "$pidfile" ]; then
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_pidcmd='_pid=`check_pidfile '$pidfile' '$command'`'
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elif [ -n "$command" ]; then
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_pidcmd='_pid=`check_process '$command'`'
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fi
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if [ -n "$_pidcmd" ]; then
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_keywords="${_keywords} status poll"
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fi
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fi
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if [ -z "$_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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_flags=$flags
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else
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eval _flags=\$${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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# if ${rcvar} is set, and $1 is not
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# "rcvar" or "status", then run
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# checkyesno ${rcvar}
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# and return if that failed
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#
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# XXXX use case?
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if [ -n "${rcvar}" -a "$_arg" != "rcvar" -a "$_arg" != "status" ]; 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" != "$_arg" ]; then
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continue
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fi
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# if there's a custom ${XXX_cmd},
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# run that instead of the default
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#
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eval _cmd=\$${_arg}_cmd _precmd=\$${_arg}_precmd
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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_run" ]; then
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return 1
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fi
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eval $_cmd
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return 0
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fi
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case "$_arg" in # default operations...
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status)
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if [ -n "$_pid" ]; then
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echo "${name} is running as pid $_pid."
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else
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echo "${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 "$_pid" ]; then
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echo "${name} already running? (pid=$_pid)."
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exit 1
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fi
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if [ ! -x $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 set."
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if [ -z "$_rc_force_run" ]; 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_run" ]; 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 $required_files; do
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if [ ! -r "${_f}" ]; then
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warn "${_f} is not readable."
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if [ -z "$_rc_force_run" ]; 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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# 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_run" ]; then
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return 1
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fi
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# setup the command to run, and run it
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#
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echo "Starting ${name}."
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if [ -n "$_chroot" ]; then
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_doit="\
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${_nice:+nice -n $_nice }\
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chroot ${_user:+-u $_user }${_group:+-g $_group }${_groups:+-G $_groups }\
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$_chroot $command $_flags $command_args"
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else
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_doit="\
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${_chdir:+cd $_chdir; }\
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${_nice:+nice -n $_nice }\
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$command $_flags $command_args"
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if [ -n "$_user" ]; then
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_doit="su -m $_user -c 'sh -c \"$_doit\"'"
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fi
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fi
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eval $_doit
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;;
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stop)
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if [ -z "$_pid" ]; then
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if [ -n "$pidfile" ]; then
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echo \
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"${name} not running? (check $pidfile)."
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else
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echo "${name} not running?"
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fi
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exit 1
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fi
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if ! eval $_precmd && [ -z "$_rc_force_run" ]; then
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return 1
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fi
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echo "Stopping ${name}."
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_doit="kill -${sig_stop:-TERM} $_pid"
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if [ -n "$_user" ]; then
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_doit="su -m $_user -c 'sh -c \"$_doit\"'"
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fi
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eval $_doit
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wait_for_pids $_pid
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;;
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reload)
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if [ -z "$_pid" ]; then
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if [ -n "$pidfile" ]; then
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echo \
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"${name} not running? (check $pidfile)."
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else
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echo "${name} not running?"
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fi
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exit 1
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fi
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echo "Reloading ${name} config files."
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if ! eval $_precmd && [ -z "$_rc_force_run" ]; then
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return 1
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fi
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_doit="kill -${sig_reload:-HUP} $_pid"
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if [ -n "$_user" ]; then
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_doit="su -m $_user -c 'sh -c \"$_doit\"'"
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fi
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eval $_doit
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;;
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restart)
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if ! eval $_precmd && [ -z "$_rc_force_run" ]; then
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return 1
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fi
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# prevent restart being called more
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# than once by any given script
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#
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if [ -n "$_rc_restart_done" ]; then
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return 0
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fi
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_rc_restart_done=YES
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( $0 ${_rc_force_run:+force}stop )
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$0 ${_rc_force_run:+force}start
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;;
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poll)
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if [ -n "$_pid" ]; then
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wait_for_pids $_pid
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fi
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;;
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rcvar)
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echo "# $name"
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if [ -n "$rcvar" ]; then
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if checkyesno ${rcvar}; then
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echo "\$${rcvar}=YES"
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else
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echo "\$${rcvar}=NO"
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fi
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fi
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;;
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|
|
*)
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rc_usage "$_keywords"
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;;
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|
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esac
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return 0
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done
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|
|
echo 1>&2 "$0: unknown directive '$_arg'."
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rc_usage "$_keywords"
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exit 1
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}
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|
|
|
#
|
|
# 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.
|
|
#
|
|
# Note: because `.sh' files are sourced into the current environment
|
|
# run_rc_command() shouldn't be used because its difficult to ensure
|
|
# that the global variable state before and after the sourcing of
|
|
# the .sh file won't adversely affect other scripts.
|
|
#
|
|
run_rc_script()
|
|
{
|
|
_file=$1
|
|
_arg=$2
|
|
if [ -z "$_file" -o -z "$_arg" ]; then
|
|
err 3 'USAGE: run_rc_script file arg'
|
|
fi
|
|
|
|
if [ -n "$rc_fast_and_loose" ]; then
|
|
unset name command command_args extra_commands pidfile rcvar
|
|
unset required_dirs required_files required_vars
|
|
eval unset ${_arg}_cmd ${_arg}_precmd
|
|
set $_arg ; . $_file
|
|
else
|
|
case "$_file" in
|
|
*.sh) # run in current shell
|
|
set $_arg ; . $_file
|
|
;;
|
|
*[~#]|*.OLD|*.orig) # scratch file; skip
|
|
warn "Ignoring scratch file $_file"
|
|
;;
|
|
*) # run in subshell
|
|
if [ -x $_file ]; then
|
|
( set $_arg ; . $_file )
|
|
fi
|
|
;;
|
|
esac
|
|
fi
|
|
}
|
|
|
|
#
|
|
# load_rc_config
|
|
# 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 [ -z "$_rc_conf_loaded" ]; then
|
|
. /etc/rc.conf
|
|
_rc_conf_loaded=YES
|
|
fi
|
|
if [ -f /etc/rc.conf.d/"$_command" ]; then
|
|
. /etc/rc.conf.d/"$_command"
|
|
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]("
|
|
|
|
_sep=
|
|
for _elem in $*; do
|
|
echo -n 1>&2 "$_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
|
|
|
|
logger "$0: ERROR: $*"
|
|
echo 1>&2 "$0: ERROR: $*"
|
|
exit $exitval
|
|
}
|
|
|
|
#
|
|
# warn message
|
|
# Display message to stderr and log to the syslog.
|
|
#
|
|
warn()
|
|
{
|
|
logger "$0: WARNING: $*"
|
|
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
|
|
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
|
|
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
|
|
}
|