#!/bin/bash

# This file must be executable to work! chmod 755!

# Look at what a host is exporting to determine what we can mount.
# This is very simple, but it appears to work surprisingly well

key="$1"

# add "nosymlink" here if you want to suppress symlinking local filesystems
# add "nonstrict" to make it OK for some filesystems to not mount
# choose one of the two lines below depending on the NFS version in your
# environment
opts="-fstype=nfs,hard,intr,nodev,nosuid"
#opts="-fstype=nfs4,hard,intr,nodev,nosuid,async"

# Showmount comes in a number of names and varieties.  "showmount" is
# typically an older version which accepts the '--no-headers' flag
# but ignores it.  "kshowmount" is the newer version installed with knfsd,
# which both accepts and acts on the '--no-headers' flag.
#SHOWMOUNT="kshowmount --no-headers -e $key"
#SHOWMOUNT="showmount -e $key | tail -n +2"

for P in /bin /sbin /usr/bin /usr/sbin
do
	for M in showmount kshowmount
	do
		if [ -x $P/$M ]
		then
			SMNT=$P/$M
			break
		fi
	done
done

[ -x $SMNT ] || exit 1

# Newer distributions get this right
SHOWMOUNT="$SMNT --no-headers -e $key"

$SHOWMOUNT | LC_ALL=C cut -d' ' -f1 | LC_ALL=C sort -u | \
	awk -v key="$key" -v opts="$opts" -- '
	BEGIN	{ ORS=""; first=1 }
		{ if (first) { print opts; first=0 }; print " \\\n\t" $1, key ":" $1 }
	END	{ if (!first) print "\n"; else exit 1 }
	' | sed 's/#/\\#/g'