#!/bin/sh
#
# fhfind: takes the expanded filehandle string from an
# NFS write error or stale filehandle message and maps
# it to a pathname on the server.
#
# The device id in the filehandle is used to locate the
# filesystem mountpoint.  This is then used as the starting
# point for a find for the file with the inode number
# extracted from the filehandle.
# 
# If the filesystem is big - the find may take a long time.
# Since there's no way to terminate the find upon finding
# the file, you may need to kill fhfind after it prints
# the path.
#

if [ $# -ne 8 ]; then
        echo
        echo "Usage: fhfind <filehandle> e.g."
        echo
        echo "  fhfind 1540002 2 a0000 4df07 48df4455 a0000 2 25d1121d"
        exit 1
fi

# Filesystem ID

FSID1=$1
FSID2=$2

# FID for the file

FFID1=$3
FFID2=`echo $4 | tr [a-z] [A-Z]` # uppercase for bc
FFID3=$5

# FID for the export point (not used)

EFID1=$6
EFID2=$7
EFID3=$8

# Use the device id to find the /etc/mnttab
# entry and thus the mountpoint for the filesystem.

E=`grep $FSID1 /etc/mnttab`
if [ "$E" = "" ] ; then
        echo
        echo "Cannot find filesystem for devid $FSID1"
        exit 0
fi

set - $E
MNTPNT=$2

INUM=`echo "ibase=16;$FFID2" | bc` # hex to decimal for find

echo
echo "Now searching $MNTPNT for inode number $INUM"
echo

find $MNTPNT -mount -inum $INUM -print 2>/dev/null