mount from remote system using fuse and sshfs

Forum: DSL Tips and Tricks
Topic: mount from remote system using fuse and sshfs
started by: fredvej

Posted by fredvej on Feb. 26 2007,18:34

Here's a script to mount something from a remote system running an SSH server. On your local machine you need a mountpoint, load the fuse module and mount using sshfs.

Code Sample

# script mounts a path from a remote system using fuse and sshfs

THISPROG=`basename $0`
PUBLICIP=12.34.56.78
LOCALIP=192.168.0.2
SSHPORT=22

USAGE="
Usage : $THISPROG [options] {username} {remote path to mount} {local mount point}

local mount point must be an existing directory

options :

-r {IP address} : use IP adress for remote host , e.g. -r 123.45.67.89
Default remote IP is $PUBLICIP

-p {port number} : Port number to use for ssh connection , default $SSHPORT

-l {IP address | d} : remote host at local LAN , no caching.
Use provided IP address or default (d) $LOCALIP
"

############ FUNCTIONS ######################

Exit_if_Error ()
{
if [ $RETURN -ne 0 ]
then
echo "$COMMAND failed with return code $RETURN"
exit $RETURN
fi
}

LoadModule ()
{
MOD2LOAD=$1
ISLOADED=`lsmod | grep $MOD2LOAD`
if [ -z "$ISLOADED" ]
then
COMMAND="$SUDO /sbin/modprobe -v $MOD2LOAD"
echo "probing module with $COMMAND"
$COMMAND
RETURN=$?
Exit_if_Error
fi
}

############ MAIN ###########################

# follow_symlinks not in DSL 3.2 #FSOPTIONS="-o compression=yes,transform_symlinks,follow_symlinks,allow_other,nonempty"
FSOPTIONS="-o compression=yes,transform_symlinks,allow_other,nonempty"
HOSTIP=$PUBLICIP

while getopts 'r:p:l:hH' OPTION
do
case $OPTION in
r)
HOSTIP=$OPTARG
;;
l)
HOSTIP=$OPTARG
if [ "$HOSTIP" = "d" ]
then
HOSTIP=$LOCALIP
fi
FSOPTIONS="${FSOPTIONS},sshfs_sync,no_readahead,cache=no"
;;
p)
SSHPORT=$OPTARG
;;
h|H)
echo "$USAGE"
exit 1
;;
*)
echo "$USAGE"
exit 1
;;
esac
done

shift `expr $OPTIND - 1`
FSOPTIONS="-p $SSHPORT $FSOPTIONS"

LOGINAS=$1
RPATH="$2"
MPOINT="$3"

if [ $# -ne 3 ]
then
echo "
Number of parameters must be 3 - aborting !"
echo "$USAGE"
exit 1
fi

USELOGIN="${LOGINAS}@"

if [ ! -d "$MPOINT" ]
then
echo "
mount point '$MPOINT' is not found or is not a directory - aborting !"
echo "$USAGE"
exit 2
fi

USERID=`id -u`
if [ "$USERID" = "0" ]
then
SUDO=""
else
SUDO=/usr/bin/sudo
if [ -n "$FSOPTIONS" ]
then
# local uid on local mountpoint, remote user's id on remote filesystem
FSOPTIONS="${FSOPTIONS},uid=$USERID"
fi
fi

LoadModule fuse

COMMAND="$SUDO sshfs \"${USELOGIN}${HOSTIP}:${RPATH}\" \"$MPOINT\" ${FSOPTIONS}"
echo "mounting with $COMMAND"
$SUDO sshfs "${USELOGIN}${HOSTIP}:${RPATH}" "$MPOINT" ${FSOPTIONS}
RETURN=$?
Exit_if_Error

Unmount :

Code Sample

sudo fusermount -u $MPOINT

Enjoy

Posted by fredvej on Feb. 28 2007,15:18

Sorry, follow_symlinks is not recognised by DSL as an sshfs option.

Correction to the script :
FSOPTIONS="-o compression=yes,transform_symlinks,allow_other,nonempty"