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#! /bin/bash
#*********************************************************************
#
# This script is part of FAI (Fully Automatic Installation)
# (c) 2003-2006 by Thomas Lange, lange@informatik.uni-koeln.de
# Universitaet zu Koeln
#
#*********************************************************************
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
mkrwsize() {
# save all dirs and files under directory $2
# mount tmpfs on top of dir $2
# extract dirs and files into tmpfs
local n=
if [ ! -d "$2" ]; then
echo "WARNING: $2 is not a directory. Cannot make it writeable."
return
fi
# test for already writable
temp=$(mktemp -q -p $2)
if [ $? -eq 0 ]; then
echo "mkrw: $2 is already writable."
rm $temp
return
fi
[ -n "$3" ] && n="-n"
local tmp1=$(mktemp) || exit 12
tar -C $2 -cf $tmp1 .
mount $n -o size=$1 -t tmpfs tmpfs $2
tar -C $2 -xf $tmp1
rm -f $tmp1
}
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
size=10m # default size
while getopts s:n opt ; do
case "$opt" in
s) size="$OPTARG" ;;
n) no_mount=1 ;;
esac
done
shift $(($OPTIND - 1))
for d in "$@"; do
[ -d "$d" ] && mkrwsize $size $d $no_mount
done
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