ssh-executed-with-command

#!/bin/bash

# This script is meant to be used from within ssh_config.
#
# It fixes weird behavior of SSH where it returns error when executing
# command from command line while RemoteCommand was used in configuration file
# for this host, like this:
#
# Host pirx
#     RemoteCommand fish
#     RequestTTY yes
#
# Such configuration results in error when executing remote command:
# #> ssh pirx ls                                                                                                                                                                     śro, 10 cze 2020, 11:26:07
# Cannot execute command-line and remote command.
#
# To fix this behavior simply add the following to your .ssh/config or /etc/ssh/ssh_config file:
#
# Match exec "ssh-executed-with-command"
#     RemoteCommand none
#     RequestTTY auto
#

if [[ -z "$1" ]]; then
	pid=$PPID

	while [[ "$(cat "/proc/$pid/comm")" != "ssh" ]]; do
		pid="$(ps -o ppid= $pid)"
		pid="${pid//[[:blank:]]/}"
		if (( pid == 0 )); then
			exit 0
		fi
	done

	exec xargs -0 "$0" < /proc/$pid/cmdline
fi

shift

unrecognizedOptions=0
while getopts 46AaCfGgKkMNnqsTtVvXxYyB:b:c:D:E:e:F:I:i:J:L:l:m:O:o:p:Q:R:S:W:w: FLAG; do
	case $FLAG in
		\?|:)
			(( unrecognizedOptions++ ))
			;;
		*)
			;;
	esac
done


if (( unrecognizedOptions > 0 )) || (( $# > 1 )); then
	exit 0
fi

exit 1