test: wait for loopback device being ready to manipulate

Follow-up for 6626ea08f6db3c050b5e05fa760cf0e371862173.

diff --git a/src/partition/test-repart.sh b/src/partition/test-repart.sh
index d50a79a15e17a3c6389fa3a8026bbca2941befe3..178379312748ad06ba87ab407b09ac8f8623da7f 100755 (executable)
--- a/src/partition/test-repart.sh
+++ b/src/partition/test-repart.sh
@@ -199,6 +199,11 @@ $D/zzz7 : start=     6291416, size=       98304, type=0FC63DAF-8483-4772-8E79-3D
 EOF
 
     LOOP="$(losetup -P --show --find "$D/zzz")"
+    while : ; do
+        test -e "$LOOP" && break
+        sleep .2
+    done
+
     VOLUME="test-repart-$RANDOM"
 
     touch "$D/empty-password"