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#!/bin/bash
# Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
# define prog entry (called from progdefs file)
# $1 - program name
# $2 - instance name
# $3 - usage string
# $4 - full program name (if not set, $BINREF/$1 will be used)
prog() {
idx=$entry_cnt
eval "prog_$idx=\"$1\""
eval "instance_$idx=\"$2\""
eval "usage_$idx=\"$3\""
eval "name_$idx=\"$4\""
entry_cnt=$(($entry_cnt + 1))
}
# initial usage check, then load progdefs
if [ "$#" -lt 1 ]; then
echo "usage: $0 <progdefs> ..."
exit 1
fi
progdefs=$1
shift
usage=""
name=""
entry_cnt=0
case $progdefs in */*) ;; *) progdefs="./$progdefs" ;; esac
. $progdefs # read progdefs file
# print dynamic usage based on progdefs
print_usage() {
idx=0
while [ $idx -lt $entry_cnt ]; do
eval "p=\"\$prog_$idx\""
eval "i=\"\$instance_$idx\""
echo "usage: ... (start|stop|check) $p $i"
idx=$(($idx + 1))
done
echo "usage: ... (start|stop|check) all"
echo "start/stop/check programs."
exit 1
}
# check if given prog/instance pair is available
# $1 - prog
# $2 - instance
check_entry() {
idx=0
while [ $idx -lt $entry_cnt ]; do
eval "p=\"\$prog_$idx\""
eval "i=\"\$instance_$idx\""
if [ "$p" = "$1" ] && [ "$i" = "$2" ]; then
eval "usage=\"\$usage_$idx\""
eval "name=\"\$name_$idx\""
return 0
fi
idx=$(($idx + 1))
done
return 1
}
# check for correct usage based on progdefs
check_usage() {
if [ "$1" != "start" ] && [ "$1" != "stop" ] && [ "$1" != "check" ]; then
print_usage
fi
if [ "$#" -eq 2 ] && [ "$2" = "all" ]; then
return 0
fi
if [ "$#" -eq 3 ] && check_entry "$2" "$3"; then
return 0
fi
print_usage
}
# start a single program
# $1 - program name
# $2 - instance name
# $3 - usage string
# $4 - full program name (if not set, $BINREF/$1 will be used)
start() {
pid=`cat pid."$1"."$2" 2>/dev/null`
if [ "X$pid" != "X" ] && kill -0 $pid 2> /dev/null; then
return 0
fi
if [ "X$4" != "X" ]; then
$4 $3 > out."$1"."$2" 2>&1 &
else
$BINREF/$1 $3 > out."$1"."$2" 2>&1 &
fi
echo "$!" > pid."$1"."$2"
}
# stop a single program
# $1 - program name
# $2 - instance name
stop() {
pid=`cat pid."$1"."$2" 2>/dev/null`
if [ "X$pid" = "X" ]; then
return 0
fi
kill $pid > /dev/null 2>&1
rm -f pid."$1"."$2"
}
# check a single program
# $1 - program name
# $2 - instance name
check() {
pid=`cat pid."$1"."$2" 2>/dev/null`
if [ "X$pid" != "X" ] && kill -0 $pid 2> /dev/null; then
echo "$1/$2 is running"
else
echo "$1/$2 is not running"
fi
}
# start all known programs
start_all() {
idx=0
while [ $idx -lt $entry_cnt ]; do
eval "p=\$prog_$idx"
eval "i=\$instance_$idx"
eval "u=\$usage_$idx"
eval "n=\$name_$idx"
start "$p" "$i" "$u" "$n"
idx=$(($idx + 1))
done
}
# stop all known programs
stop_all() {
idx=0
while [ $idx -lt $entry_cnt ]; do
eval "p=\$prog_$idx"
eval "i=\$instance_$idx"
stop "$p" "$i"
idx=$(($idx + 1))
done
}
# check all known programs
check_all() {
idx=0
while [ $idx -lt $entry_cnt ]; do
eval "p=\$prog_$idx"
eval "i=\$instance_$idx"
check "$p" "$i"
idx=$(($idx + 1))
done
}
############################
############################
check_usage "$@"
# handle start/stop/check all
if [ "$2" = "all" ]; then
if [ "$1" = "start" ]; then
start_all
elif [ "$1" = "stop" ]; then
stop_all
else
check_all
fi
exit 0
fi
# handle start/stop/check of single program
if [ "$1" = "start" ]; then
start "$2" "$3" "$usage" "$name"
elif [ "$1" = "stop" ]; then
stop "$2" "$3"
else
check "$2" "$3"
fi
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