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|
#!/bin/bash
web_content_pids()
{
top -w512 -b -o '%MEM' | {
unset PIDS
while read line
do
case "$line" in
top*)
if [ "${PIDS+is_set}" ]
then
echo $PIDS
fi
while [ "$line" ]
do read line
done
PIDS=
;;
*)
set -- $line
[ "${12} ${13}" = "Web Content" ] || continue
PIDS="$PIDS $1"
;;
esac
done
}
}
sum()
{
local total=0 n
for n in $*
do
total=$((total + n))
done
echo $total
}
last()
{
local n=$1
shift
set -- $*
while [ $# -ge "$n" ]
do
shift
done
printf '%s\n' "$*"
}
new_pids()
{
# This is not correct because the correct code is not implemented yet.
# But this is OK for testing the other parts. Fixing this is only an
# optimization.
[ "$1" != "$2" ]
}
enable -f /usr/lib/bash/sleep sleep 2>/dev/null || true
unset IOTOP_PID
relaunch_iotop()
{
if [ "$IOTOP_PID" ]
then
kill "$IOTOP_PID"
fi
web_content_pids | (
while read pids
do
set -- $pids
if [ $# = 0 ]
then
kill_iotop
elif new_pids "$pids" "$oldpids"
then
kill_iotop
IOTOP_PID=$(launch_iotop "$@")
fi
sleep 1
oldpids=$pids
done
)
}
kill_iotop()
{
if [ "$IOTOP_PID" ]
then
(
set -x
kill "$IOTOP_PID"
)
fi
}
launch_iotop()
{
set -- $(printf '\55\55pid=%s\n' "$@" | tac)
(set -x
iotop -qq -b "$@") | iotop_reader &
echo $!
}
iotop_reader()
{
log=
pct_log=
while read line
do
case "$line" in
"Total DISK"*)
pct=$(sum $pct_log)
[ "$pct" -ge 85 ] && over=y || over=
pct_log=
if [ "$over" ]
then
log=$(last 10 $log 1)
over=
sum=$(sum $log)
if [ "$(sum $log)" -gt 4 ]
then
log= # this is year zero; all past history is erased.
(
set -x
fireslay -y
)
fi
else
log=$(last 10 $log 0)
fi
case "$log" in
*1* | * )
(
set -x
: $log
)
;;
esac
;;
"Current DISK"*) continue ;;
*)
set -- $line
pct=${10%.*}
pct_log="$pct_log $pct"
;;
esac
done
}
if [ "$UID" != 0 ]
then
sudo -- "$0" "$@"
exit
fi
while [ $# -gt 0 ]
do
case "$1" in
-q | --quiet )
exec 2>/dev/null
shift
;;
-a | --all )
IOSLAY_KILL_ALL=y
shift
;;
-- )
shift
break
;;
-* )
exit 1
;;
* )
break
;;
esac
done
# if [ $# -gt 0 ]
# then
# echo "$0: Error: usage" >&2
# exit 1
# fi
iotop -qq -b $(printf '\55\55pid=%s\n' "$@") | iotop_reader
|
