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#!/bin/bash
# rexec.sh
# ltask lightweight remote task execution
# Copyright (C) 2020 Jonas Gunz <himself@jonasgunz.de>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
ARGC=$#
ARGV=($@)
SSH_IDENTITY=~/.ssh/id_rsa
SSH_PORT=22
SSH_HOST=
SSH_OPTIONS="-q -o NumberOfPasswordPrompts=0 -o StrictHostKeyChecking=no"
SSH="ssh $SSH_OPTIONS"
SCRIPT_FILES=()
SCRIPT_INTERPRETER=/bin/sh
FILES=()
function parse_args() {
for (( i=0; i < $ARGC;i++ )); do
local ARGREGEX="^-.*"
if [[ ! ${ARGV[$i]} =~ $ARGREGEX ]]; then
[ -z $SSH_HOST ] && SSH_HOST=${ARGV[$i]} && continue
SCRIPT_FILES+=(${ARGV[$i]})
continue
fi
case ${ARGV[$i]} in
-p)
i=$((i+1))
SSH_PORT=${ARGV[$i]};;
-s)
i=$((i+1))
SSH=${ARGV[$i]} $SSH_OPTIONS;;
-i)
i=$((i+1))
SSH_IDENTITY=${ARGV[$i]};;
-f)
i=$((i+1))
FILES+=(${ARGV[$i]});;
-h)
print_help 0;;
*)
echo Invalid Argument ${ARGV[$i]}
echo $0 -h for help
exit 1;;
esac
done
[ -z $SSH_HOST ] && echo No host specified && exit 1
[ ${#SCRIPT_FILES[@]} -eq 0 ] && echo No script specified && exit 1
}
function print_help() {
cat << EOF
Execute a script on a remote host via SSH
Usage:
$0 [OPTIONS] [USER@]HOST SCRIPT
-p <PORT> SSH port (default: 22)
-s <SSH> Custom SSH program
-i <IDENTITY> SSH Identity file (default: ~/.ssh/id_rsa.pub)
-f FILE Copy FILE to target before execution
-h Print this help text
EOF
exit $1
}
parse_args
[ ${#FILES[@]} -gt 0 ] && scp $SSH_OPTIONS -i $SSH_IDENTITY -P $SSH_PORT ${FILES[@]} $SSH_HOST:
cat ${SCRIPT_FILES[@]} | $SSH -p $SSH_PORT -i $SSH_IDENTITY $SSH_HOST '/bin/bash 2> >(while read line; do echo [ERR] $line; done)' 2>/dev/null
exit $?
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