#! /sbin/nologin
# $Id$

agenteval=/tmp/.$USER.ssh-agent.eval
if lockfile -1 -r 3 -l 10 -s 1 $agenteval.lock;then
	test -f $agenteval -a -O $agenteval -a -G $agenteval &&
			# ">/dev/null" to prevent: echo Agent pid 31074;
			source $agenteval >/dev/null
	if [ "ssh-agent" != "`(xargs -0 </proc/"$SSH_AGENT_PID"/cmdline sh -c 'echo "$0"') 2>/dev/null `" ];then
		rm -f $agenteval
		(test ! -e $agenteval && ssh-agent -s >$agenteval) || echo >&2 'Failing ssh-agent!'
		# ">/dev/null" to prevent: echo Agent pid 31074;
		source $agenteval >/dev/null
	fi
	rm -f $agenteval.lock
fi
for key in $HOME/.ssh/id_dsa;do
	# Prevent gdm(8) lockups on non-interactive consoles.
	tty -s || continue
	(ssh-add -l|grep -qw "$key") && continue
	if lockfile -! -1 -r 0 $agenteval.input.lock 2>/dev/null;then
		echo >&2 -n "Locking: $agenteval.input.lock ... "
		lockfile -1 -r -1 $agenteval.input.lock
		echo >&2 "locked"
	fi
	# Recheck identity existence after the lock acquire
	if ssh-add -l|grep -qw "$key";then
		echo >&2 "Identity $key already appended in the meantime."
	else
		# "2>/dev/null" to prevent: Identity added: .ssh/id_dsa (.ssh/id_dsa)
		ssh-add "$key" 2>/dev/null
	fi
	rm -f $agenteval.input.lock
	echo >&2 "$agenteval.input.lock unlocked."
done
unset agenteval