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|
#!/bin/bash
CFG_FILE=$HOME/.config/ssh-check.list
TIMEOUT=5 # seconds
read -d '' SSH_OPTIONS <<END
-o ConnectTimeout=$TIMEOUT
-o ControlPath=none
-o PasswordAuthentication=no
-o StrictHostKeyChecking=yes
END
quietly()
{
"$@" </dev/null >/dev/null 2>&1
}
match()
{
local search_text="$1" search_pattern invert=
shift
for search_pattern in "$@"
do
if [[ "$search_pattern" = '!'* ]]
then
invert=y
fi
if (set +e
[[ $search_text = ${search_pattern#!} ]]
[ $? ${invert:+ !}= 0 ])
then
return
fi
done
false
}
main()
{
local h
declare -a hosts=()
declare -i max_found_host_length=0
while read h cmd
do
if [ ${#h} -gt $max_found_host_length ]
then
max_found_host_length=${#h}
fi
hosts+=("$h $cmd")
done < "$CFG_FILE"
while true
do
{
default_hostcmd=uptime
for h in "${hosts[@]}"
do
host=${h%% *}
hostcmd=${h#* }
[ "$host" ] || continue
[ $# = 0 ] || match "$host" "$@" || continue
(
#.........."1234567890123456"
successpat=" Success: %-${max_found_host_length}s %s\n"
failurepat="*FAILURE: %-${max_found_host_length}s %s\n"
command_stderr=$(mktemp)
if command_stdout=$(ssh -n $SSH_OPTIONS -- \
"$host" \
"${hostcmd:-$default_hostcmd}" \
2>"$command_stderr")
then
if [ "$hostcmd" ]
then
logtail=${command_stdout: -40 }
else
logtail=${command_stdout: 1 : 40 }
fi
printf "$successpat" "$host" "${logtail@Q}"
else
REPLY=
while read
do
REPLY=${REPLY%$'\r'}
printf "$failurepat" "$host" "${REPLY@Q}"
done <"$command_stderr" >&2
logtail=${REPLY: -40 }
printf "$failurepat" "$host" "${logtail@Q}"
fi
rm "$command_stderr"
) &
done
wait
} | column -t -s'$'
tty -s && break
sleep 5
done
}
edit_config()
{
set -e
f=$(mktemp)
if [ -e "$CFG_FILE" ]
then
cp "$CFG_FILE" "$f"
fi
touch -r "$f" "$f".timestamp
$EDITOR "$f"
[ -e "$f" -a "$f" -nt "$f".timestamp ]
mv "$f" "$CFG_FILE"
set +e
rm "$f".timestamp
}
usage()
{
cat <<EOF
Usage: $0 [--help | -h] [--verbose | -v] [--edit] [--run] [--] [host pattern] [...]
EOF
}
unset run_anyway do_edit
while [ $# -gt 0 ]
do
case "$1" in
--edit) do_edit=y;;
--run) run_anyway=y;;
--help | -h) usage; exit;;
--command) REMOTE_COMMAND=$2; shift 2;;
--verbose | -v) VERBOSE=y; shift;;
--) shift; break;;
-*) usage >&2; exit 1 ;;
*) break;;
esac
shift
done
if [ "$do_edit" ]
then
edit_config
r=$?
if ! [ "${run_anyway}" ]
then
exit $r
fi
elif [ ! -e "$CFG_FILE" -a -t 0 ]
then
edit_config
fi
main "$@"
|
