133 lines
3.6 KiB
Bash
Executable File
133 lines
3.6 KiB
Bash
Executable File
#!/bin/zsh
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use bastion --group remote
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use config --group remote
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DEPENDENCIES+=(timeout ssh)
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#####################################################################
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USAGE__options='
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-n, --name session name to test
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-s, --connection-string explicit session host / ssh connection string to test
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-t, --maximum-timeout maximum connection timeout before failure (in seconds)
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-c, --command testing command; performs echo by default
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--use-bastion true / false override for bastion preference
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(default: session.name.bastion.preferred or "false")
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'
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USAGE__description='
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Tests whether you can connect to a particular session or
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host string.
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'
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#####################################################################
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MAIN() {
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local CONNECTION_STRING REMOTE_NAME
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local TIMEOUT_SECONDS=3
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local COMMAND='echo OK &>/dev/null'
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local USE_BASTION
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while [[ $# -gt 0 ]]
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do
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local _S=1
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case $1 in
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-n | --name )
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((_S+=1))
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REMOTE_NAME=$2
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CONNECTION_STRING=$(REMOTE__GET_CONNECTION_STRING $REMOTE_NAME)
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;;
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-s | --connection_string )
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((_S+=1))
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CONNECTION_STRING="$2"
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;;
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-t | --maximum-timout )
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((_S+=1))
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TIMEOUT_SECONDS=$2
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[[ $TIMEOUT_SECONDS -gt 0 ]] \
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|| ERROR "invalid timeout seconds '$TIMEOUT_SECONDS'"
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;;
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-c | --command )
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((_S+=1))
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COMMAND=$2
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;;
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--use-bastion )
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((_S+=1))
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USE_BASTION=$2
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case $USE_BASTION in
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true | false ) ;;
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* ) ERROR "invalid setting for '--use-bastion' (must be 'true' or 'false')" ;;
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esac
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;;
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* ) ERROR "unrecognized argument '$1'" ;;
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esac
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[[ $_S -le $# ]] \
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&& shift $_S \
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|| ERROR "missing argument for '$1'" \
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|| shift $#
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done
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[ $CONNECTION_STRING ] \
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|| ERROR "unable to determine connection string"
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[ $USE_BASTION ] || {
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USE_BASTION=$(\
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REMOTE__QUERY_CONNECTION_WITH_FALLBACK \
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".sessions.$REMOTE_NAME.bastion.preferred" \
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'false' \
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;
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)
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}
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CHECK_ERRORS
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##########################################
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local BASTION_HOST
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[[ $USE_BASTION =~ true ]] && {
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BASTION_HOST=$(\
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REMOTE__QUERY_CONNECTION_WITH_FALLBACK \
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".sessions.$REMOTE_NAME.bastion.session" \
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)
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}
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[[ $USE_BASTION =~ true ]] && {
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[ $BASTION_HOST ] \
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|| ERROR "cannot connect to $REMOTE_NAME; no configured bastion host" \
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|| return 1
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}
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case $CONNECTION_STRING in
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localhost | $USER@localhost )
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CONNECTION_TEST() { return 0; } # current user on local machine can always connect
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;;
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* )
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[[ $USE_BASTION =~ true ]] && {
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DEBUG "MAIN -n $BASTION_HOST -c \"$(GET_PASSTHROUGH_PREFIX) remote test -- -n $REMOTE_NAME -c \"$COMMAND\"\""
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BASTION_TARGET="$REMOTE_NAME" MAIN -n $BASTION_HOST -c "$(GET_PASSTHROUGH_PREFIX) remote test -- -n $REMOTE_NAME -c \"$COMMAND\""
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return $?
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}
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CONNECTION_TEST() {
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[ $REMOTE_NAME ] && {
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[[ $(REMOTE__QUERY_CONNECTION .sessions.$REMOTE_NAME.enabled) =~ false ]] && {
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return 1
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}
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}
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local REMOTE_ARGS=()
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REMOTE_ARGS+=($(REMOTE__GET_SSH_ARGS --type ssh $REMOTE_NAME))
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REMOTE_ARGS+=(-o BatchMode=yes)
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DEBUG "attempting\ntimeout $TIMEOUT_SECONDS ssh $REMOTE_ARGS $CONNECTION_STRING "'\'"\"$COMMAND"'\'"\"" >&2
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timeout --foreground $TIMEOUT_SECONDS ssh ${REMOTE_ARGS[@]} "$CONNECTION_STRING" "$COMMAND" >&2
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}
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;;
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esac
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[ $REMOTE_NAME ] || REMOTE_NAME=explicit
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STATUS "testing connection $CONNECTION_STRING ($REMOTE_NAME$([ $BASTION_TARGET ] && echo " -> $BASTION_TARGET"))" \
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&& CONNECTION_TEST \
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&& SUCCESS "successfully connected to '$CONNECTION_STRING' ($REMOTE_NAME)" \
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|| ERROR "connection to '$CONNECTION_STRING ($REMOTE_NAME)' failed" \
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}
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