#!/bin/sh
#-
# Copyright (c) 2012 Eitan Adler
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer
#    in this position and unchanged.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# $FreeBSD: stable/11/usr.bin/ssh-copy-id/ssh-copy-id.sh 283001 2015-05-16 06:15:49Z eadler $

proc usage {
	echo "usage: ssh-copy-id [-lv] [-i keyfile] [-o option] [-p port] [user@]hostname" > !2
	exit 1
}

proc sendkey {
	local h="$1"
	local k="$2"
	printf "%s\n" $k | ssh $port -S none $options "$user$h" /bin/sh -c '''' \
		set -e; \
		umask 077; \
		keyfile=$HOME/.ssh/authorized_keys ; \
		mkdir -p -- "$HOME/.ssh/" ; \
		while read alg key comment ; do \
			[ -n "$key" ] || continue; \
			if ! grep -sqwF "$key" "$keyfile"; then \
				printf "$alg $key $comment\n" >> "$keyfile" ; \
			fi ; \
		done ; \
		if [ -x /sbin/restorecon ]; then \
			/sbin/restorecon -F "$HOME/.ssh/" "$keyfile" >/dev/null 2>&1 || true ; \
		fi \
	'''' 
}

proc agentKeys {
	setglobal keys = ""$[ssh-add -L | grep -v 'The agent has no identities.]$nl$keys""
}

setglobal keys = ''""
setglobal host = ''""
setglobal hasarg = ''""
setglobal user = ''""
setglobal port = ''""
setglobal nl = '"
'"
setglobal options = ''""

setglobal IFS = $nl

while getopts 'i:lo:p:v' arg {
	match $arg {
	with i	
		setglobal hasarg = '"x'"
		if test -r "$(OPTARG).pub" {
			setglobal keys = ""$[cat -- "$(OPTARG).pub]$nl$keys""
		} elif test -r $OPTARG {
			setglobal keys = ""$[cat -- $OPTARG]$nl$keys""
		} else {
			echo "File $OPTARG not found" > !2
			exit 1
		}
		
	with l	
		setglobal hasarg = '"x'"
		agentKeys
		
	with p	
		setglobal port = "-p$nl$OPTARG"
		
	with o	
		setglobal options = "$options$nl-o$nl$OPTARG"
		
	with v
		setglobal options = ""$options$nl-v""
		
	with *	
		usage
		
	}
} >&2

shift $shExpr('OPTIND-1')

if test -z $hasarg {
	agentKeys
}
if test -z $keys || test $keys = $nl {
	echo "no keys found" > !2
	exit 1
}
if test "$Argc" -eq 0 {
	usage
}

for host in [@Argv] {
	sendkey $host $keys
}