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#!/usr/bin/env bash
set -eu
set -o pipefail
[[ ${DEBUG:-} != true ]] || set -x
function error() { echo "ERROR: $1" >&2 ; exit 1; }
function info() { echo "INFO: $1"; }
function q1() { printf "%q" "$1"; }
function q() { local sep=""; [[ $# -gt 0 ]] || return; for i in "$@"; do printf "%s%q" "$sep" "$i"; sep=" "; done; }
function cleanup()
{
local code=$?
trap - INT TERM QUIT EXIT
[[ -z ${tmpdir:-} ]] || rm -rf $tmpdir
[[ -z ${remote_tmpdir:-} ]] || $SSH $HOSTNAME -- rm -rf $remote_tmpdir </dev/null
[[ -z ${remote_msg:-} ]] || rm -f $remote_msg
exit $code
}
HOSTNAME="${1:-}"
[[ -n $HOSTNAME ]] || error "missing hostname argument"
HOSTNAME=$HOSTNAME
shift
trap cleanup INT TERM QUIT EXIT
SSH_OPTS="-oConnectTimeout=30 -oConnectionAttempts=10 -oStrictHostKeyChecking=no -oUserKnownHostsFile=/dev/null -oLogLevel=ERROR -oBatchMode=yes -oControlPath=none"
# Allow overriding timeout value externally. Setting TIMEOUT to "0"
# disables the use of timeout. Default value: 3m.
if [ ${TIMEOUT:=3m} != 0 ]; then
T_OUT="timeout $TIMEOUT"
else
T_OUT=""
fi
SSH="$T_OUT ssh $SSH_OPTS"
SCP="$T_OUT scp $SSH_OPTS"
info ""
info "===================================================================="
info "Execute remotely on host: $HOSTNAME: $(q "$@")"
info "===================================================================="
tmpdir=$(mktemp -d)
find . -mindepth 1 -maxdepth 1 -type f -exec cp -a {} $tmpdir/ \;
# Debug traces
#uname -a
#ls $HOME/.ssh
#cat $HOME/.ssh/config
#ssh-add -l
#$SSH $HOSTNAME -- true
# Check that the remote host is accessible
remote_ok=false
remote_msg=$(mktemp)
# Wait until it has booted
while ! $remote_ok
do
$SSH $HOSTNAME -- true >& $remote_msg || break
grep "System is booting up. See pam_nologin" $remote_msg || remote_ok=true
[ $remote_ok ] && break
sleep 30
done
if ! $remote_ok; then
error "SSH connexion to $HOSTNAME failed."
fi
remote_tmpdir=$($SSH $HOSTNAME -- mktemp -d </dev/null) || error "Connexion to $HOSTNAME failed (error code: $?)."
$SCP -pr $tmpdir/* $HOSTNAME:$remote_tmpdir/ || error "Failed to copy files to $HOSTNAME (error code: $?)."
result=0
$SSH $HOSTNAME -- bash -c "\"cd $remote_tmpdir && $(q "$@")\"" </dev/null || result=$?
if [ $result -eq 255 ]; then
error "SSH connexion to $HOSTNAME failed."
fi
exit $result
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