TEST-70-TPM2: use "truncate" to generate disk image

Let'se operate on a sparse file here, to reuduce memory use.

diff --git a/test/units/testsuite-70.sh b/test/units/testsuite-70.sh
index 258f39c38d0a5dceaa63299feafa3b4a4113b6d3..1f626ee62f0cfa44d800d22603401195e6f1ee93 100755 (executable)
--- a/test/units/testsuite-70.sh
+++ b/test/units/testsuite-70.sh
@@ -5,10 +5,9 @@ set -o pipefail
 
 export SYSTEMD_LOG_LEVEL=debug
 
-
 # Prepare fresh disk image
 img="/var/tmp/test.img"
-dd if=/dev/zero of=$img bs=1024k count=20 status=none
+truncate -s 20M $img
 echo -n passphrase >/tmp/passphrase
 cryptsetup luksFormat -q --pbkdf pbkdf2 --pbkdf-force-iterations 1000 --use-urandom $img /tmp/passphrase