From 2692e34e5c38537680ea3d33c762c96bb1112a0e Mon Sep 17 00:00:00 2001
From: Jonas Gunz <himself@jonasgunz.de>
Date: Wed, 27 May 2020 00:07:36 +0200
Subject: Initial

---
 tools/rexec.sh | 89 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 89 insertions(+)
 create mode 100755 tools/rexec.sh

(limited to 'tools/rexec.sh')

diff --git a/tools/rexec.sh b/tools/rexec.sh
new file mode 100755
index 0000000..0b54a74
--- /dev/null
+++ b/tools/rexec.sh
@@ -0,0 +1,89 @@
+#!/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="-o NumberOfPasswordPrompts=0 -o StrictHostKeyChecking=no"
+SSH="ssh $SSH_OPTIONS"
+
+SCRIPT_FILE=
+SCRIPT_INTERPRETER=/bin/sh
+
+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
+			[ -z $SCRIPT_FILE ] && SCRIPT_FILE=${ARGV[$i]} && continue
+			
+			print_help 1
+		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]};;
+			-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
+	[ -z $SCRIPT_FILE ] && echo No script specified && exit 1
+}
+
+function print_help() {
+	echo << 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)
+	-h		Print this help text
+EOF
+	exit $1
+}
+
+parse_args
+
+[ ! -f $SCRIPT_FILE ] && echo \"$SCRIPT_FILE\" not found && exit 1
+
+INTERPRETER_STRING=$(head -n 1 $SCRIPT_FILE)
+INTERPRETER_REGEX="^#!.*"
+[[ $INTERPRETER_STRING =~ $INTERPRETER_REGEX ]] && SCRIPT_INTERPRETER=$(tail -c +3 <<< $INTERPRETER_STRING)
+
+cat $SCRIPT_FILE | $SSH -p $SSH_PORT -i $SSH_IDENTITY $SSH_HOST $SCRIPT_INTERPRETER
-- 
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