#!/bin/sh
#
# This amd automounter script is called when remote host should be
# (un)mounted under /shfs directory. Feel free to modify this script 
# to satisfy your needs (e.g add special options to shfsmount, 
# restrict mount to some users, etc.).
#
# mount user-id key dir
# umount dir

umask 022

case `basename $0` in
    "mount")
	ID="$1"; KEY="$2"; DIR="$3"
	if [ -z "$ID" -o -z "$KEY" -o -z "$DIR" ]; then
		echo "Invalid usage."
		exit 2
	fi

	RUSER=`echo "$KEY" | cut -d"%" -f1`
	RHOST=`echo "$KEY" | cut -d"%" -f2-`

	SSH_AGENT_PID=`ps -C ssh-agent -opid=,uid= | sed -n "s/^[ \t]\{1,\}\([0-9]\{1,\}\)\{1,\}[ \t]\{1,\}$ID\$/\1/p" | tail -n 1`
	SSH_AUTH_SOCK=`find /tmp -follow -maxdepth 4 -type s -user "$ID" | grep ssh | grep agent | tail -n 1`

	if [ ! -z "$SSH_AGENT_PID" -a ! -z "$SSH_AUTH_SOCK" ]; then
		export SSH_AGENT_PID SSH_AUTH_SOCK
	fi

	IDG=`grep "^[^:]*:[^:]*:$ID:.*$" /etc/passwd | cut -d":" -f4`

	mkdir -p $DIR
	shfsmount -u "$ID" -O "-o BatchMode=yes" "$RUSER@$RHOST" "$DIR" -o uid="$ID",gid="$IDG" >/dev/null 2>&1

	if [ $? -ne 0 ]; then
		rmdir $DIR
		exit 2
	else
		exit 0
	fi
	;;
	
     umount)
	DIR="$1"
	if [ -z "$DIR" ]; then
		echo "Invalid usage."
		exit 2
	fi

	if umount "$DIR" >/dev/null 2>&1; then
		rmdir "$DIR" >/dev/null 2>&1
		exit 0;
	fi
	exit 2
    ;;

    *)
	echo "Invalid usage."
	exit 2
esac