142 lines
3.6 KiB
Bash
142 lines
3.6 KiB
Bash
#!/bin/sh -T
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# $FreeBSD$
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# Copyright (c) 2003 Cyrille Lefevre. All rights reserved.
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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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#
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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
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# the documentation and/or other materials provided with the
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# distribution.
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# 3. The name of the authors and contributors may not be used to
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# endorse or promote products derived from this software without
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# specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS''
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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# PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS
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# OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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# OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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setistart () { # dir
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local dir
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dir=$1
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# goto the startup dir
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cd ${dir} || return
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# don't start a dying client
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[ -f stop_after_send.txt ] && return
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# fire up a setiathome client
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${program_path} ${program_args} > /dev/null &
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# memorize the startup dir
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eval pid_$!=${dir}
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# and the client process ID
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setipids="${setipids} $!"
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}
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setikill () { # SIGTERM handler
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local pids pid
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# save pids to kill
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pids="${sleeppid} ${setipids}"
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# avoid futher setiathome startup
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unset setipids
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# kill'em all if any
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for pid in ${pids}; do
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ps p ${pid} > /dev/null && kill ${pid}
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done
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}
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setirestart () { # SIGCHLD handler
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local pids pid dir
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# killing in progress
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[ -n "${setipids}" ] || return
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# restart in process
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[ -n "${sleeppids}" ] && return
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# wait for setiathome servers to come up
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sleep ${seti_sleep_time} &
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# wait even if more than one setiathome client dies
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sleeppid=$!
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while ps p ${sleeppid} > /dev/null; do
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wait ${sleeppid}
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done
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unset sleeppid
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# killing while sleeping
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[ -n "${setipids}" ] || return
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# save pids to restart
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pids=${setipids}
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# reset the process ID list
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unset setipids
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for pid in ${pids}; do
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if ps p ${pid} > /dev/null; then
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# still alive
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setipids="${setipids} ${pid}"
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else
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# backup the startup dir
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eval dir=\${pid_${pid}}
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# clean the old one
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unset pid_${pid}
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# launch the dead client
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eval setistart ${dir}
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fi
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done
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}
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if [ -z "${program_path}" ]; then
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case $0 in
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/*) rc_dir=${0%/*} ;;
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*) rc_dir=${PWD:-$(pwd)} ;;
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esac
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rc_file=${0##*/}
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rc_path=${rc_dir}/${rc_file}
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if ! PREFIX=$(expr ${rc_path} : "\(/.*\)/libexec/${rc_file}\$"); then
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echo "${rc_file}: Cannot determine PREFIX." >&2
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echo "Please use the complete pathname." >&2
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exit 64
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fi
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echo "Don't use this script directly, uses the following one instead :" >&2
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echo " ${PREFIX}/etc/rc.d/${rc_file%.bin}.sh start" >&2
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exit 1
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fi
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# save this shell process ID
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echo $$ > ${seti_wrkdir}/shpid.sah
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# setup handlers
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trap setikill TERM
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trap setirestart CHLD
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# startup setiathome client(s)
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for dir in ${seti_wrksuff}; do
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setistart ${seti_wrkdir}/${dir}
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done
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# wait for them until death
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while [ -n "${setipids}" ]; do
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wait
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done
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