From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jordi Pujol <jordipujolp@gmail.com>
Subject: Re: overlayfs.v8 testing on a Live system
Date: Thu, 21 Apr 2011 10:15:55 +0200
Message-ID: <201104211015.55370.jordipujolp@gmail.com>
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Cc: Miklos Szeredi <miklos@szeredi.hu>
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A Dimecres 20 Abril 2011 15:37:07, v=E0reu escriure:
> Hmm, can you please send a minimal script and necessary files with which
> I can reproduce this?

Here is attached an script that tries to reproduce that, but the problem do=
es=20
not happen, some conditions are not met, I will continue studying what is t=
he=20
situation to cause this problem,

Thanks,

Jordi Pujol

Live never ending Tale
GNU/Linux Live forever!
http://livenet.selfip.com

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#!/bin/sh

set -e

_append() {
	local g="${1}"
	local n="${2}"
	local i

	i=1
	while [ ${i} -le ${n} ]; do
		sed -i -e '$ s/^\(.*\)$/\1'${i}'/' "${g}"
		sed -i -e '$ s/^\(.*\)$/\1'${i}'/' "${g}"
		sed -i -e '$ s/^\(.*\)$/\1\n'${i}'x\1/' "${g}"
		i=$((${i}+1))
	done
	:
}

f="$(basename "$(mktemp --tmpdir="$(pwd)" "f-XXX")")"
echo "filename ${f}"
u="u-${f#*-}"
l="l-${f#*-}"
r="r-${f#*-}"

c="${1:-"10"}"
[ ${c} -ge 10 ] || c=10

echo "0" > "${f}"
mkdir "${u}"
mkdir "${l}"
mkdir "${r}"

_append "${f}" "10"
cp "${f}" "${l}/${f}"

mount -t overlayfs -o upperdir=${u},lowerdir=${l} overlayfs ${r}

_append "${f}" "${c}"
_append "${r}/${f}" "${c}"

diff "${f}" "${r}/${f}"

umount ${r}

echo "done."
:

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