From 3d80df43cd459d1985fd419d805335d852f4c38f Mon Sep 17 00:00:00 2001
From: Jan-Philipp Litza <janphilipp@litza.de>
Date: Tue, 14 Jun 2016 18:12:13 +0200
Subject: [PATCH] Remove the need for a temporary file

---
 example-dns-01-nsupdate-script.md | 10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

diff --git a/example-dns-01-nsupdate-script.md b/example-dns-01-nsupdate-script.md
index faacdd0..40cd638 100644
--- a/example-dns-01-nsupdate-script.md
+++ b/example-dns-01-nsupdate-script.md
@@ -16,20 +16,16 @@ set -u
 set -o pipefail
 umask 077
 
-updatefile="$(mktemp)"
-
 NSUPDATE="nsupdate -k /path/to/Kdnsupdatekey.private"
 done="no"
 
 if [[ "$1" = "deploy_challenge" ]]; then
-    printf "update add _acme-challenge.%s. 300 in TXT \"%s\"\n\n" "${2}" "${4}" > "${updatefile}"
-    $NSUPDATE "${updatefile}"
+    printf "update add _acme-challenge.%s. 300 in TXT \"%s\"\n\n" "${2}" "${4}" | $NSUPDATE
     done="yes"
 fi
 
 if [[ "$1" = "clean_challenge" ]]; then
-    printf "update delete _acme-challenge.%s. 300 in TXT \"%s\"\n\n" "${2}" "${4}" > "${updatefile}"
-    $NSUPDATE "${updatefile}"
+    printf "update delete _acme-challenge.%s. 300 in TXT \"%s\"\n\n" "${2}" "${4}" | $NSUPDATE
     done="yes"
 fi
 
@@ -38,8 +34,6 @@ if [[ "${1}" = "deploy_cert" ]]; then
     done="yes"
 fi
 
-rm -f "${updatefile}"
-
 if [[ ! "${done}" = "yes" ]]; then
     echo Unkown hook "${1}"
     exit 1