[PATCH] Use an unique temporary multistrap file and remove it afterwards

With adding the Process ID to the temporary multistrap configuration file
makes it unique. This allows multiple invocations on the same time.
For multi user system as Linux is, is this important.

Also is the temp file deleted after usage.
---
 polystrap.sh |    9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/polystrap.sh b/polystrap.sh
index 8f2e64d..67e2108 100755
--- a/polystrap.sh
+++ b/polystrap.sh
@@ -92,14 +92,15 @@ echo "--------------------------"
 [ -e "$ROOTDIR.tar" ] && { echo "tarball still exists"; exit; }
 [ -e "$ROOTDIR" ] && { echo "root directory still exists"; exit; }
 
-# create multistrap.conf
-echo -n > /tmp/multistrap.conf
+# create a temporary multistrap.conf, the Process ID, $$, makes it unique
+echo -n > /tmp/multistrap.conf.$$
 while read line; do
-        eval echo $line >> /tmp/multistrap.conf
+        eval echo $line >> /tmp/multistrap.conf.$$
 done < $PLATFORM/multistrap.conf
 
 # download and extract packages
-multistrap -f /tmp/multistrap.conf
+multistrap -f /tmp/multistrap.conf.$$
+rm -f /tmp/multistrap.conf.$$
 
 # backup ldconfig and ldd
 mv $ROOTDIR/sbin/ldconfig $ROOTDIR/sbin/ldconfig.REAL
-- 
1.6.2