85 lines
2.2 KiB
Plaintext
85 lines
2.2 KiB
Plaintext
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#!/bin/zsh
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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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'
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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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while [[ $# -gt 0 ]]
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do
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case $1 in
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-n | --name )
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REMOTE_NAME=$2
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CONNECTION_STRING=$(REMOTE__GET_CONNECTION_STRING $REMOTE_NAME)
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shift 1
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;;
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-s | --connection_string )
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CONNECTION_STRING="$2"
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shift 1
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;;
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-t | --maximum-timout )
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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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shift 1
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;;
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-c | --command )
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COMMAND=$2
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shift 1
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;;
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* ) ERROR "unrecognized argument '$1'" ;;
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esac
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shift 1
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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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CHECK_ERRORS
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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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CONNECTION_TEST() {
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[ $REMOTE_NAME ] && {
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[[ $(REMOTE__QUERY_CONNECTION .sessions.$REMOTE_NAME) =~ 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 --no-tty $REMOTE_NAME))
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REMOTE_ARGS+=(-o BatchMode=yes)
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DEBUG "attempting\nssh ${REMOTE_ARGS[@]} \"$CONNECTION_STRING\" \"$COMMAND\""
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timeout $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)" \
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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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