From c99b053afb0f7ce2f4416a8c225d467fbb087c5d Mon Sep 17 00:00:00 2001
From: kmpm <git@kmpm.se>
Date: Thu, 9 Apr 2020 18:17:47 +0200
Subject: [PATCH] stop on parted error

---
 pishrink.sh | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/pishrink.sh b/pishrink.sh
index d2f922a..4ddce81 100755
--- a/pishrink.sh
+++ b/pishrink.sh
@@ -160,7 +160,13 @@ trap cleanup ERR EXIT
 #Gather info
 info "Gathering data"
 beforesize=$(ls -lh "$img" | cut -d ' ' -f 5)
-parted_output=$(parted -ms "$img" unit B print | tail -n 1)
+if ! parted_output=$(parted -ms "$img" unit B print); then
+  rc=$?
+	error $LINENO "parted failed with rc $rc"
+  info "Possibly invalid image. Run 'parted $img unit B print' manually to investigate"
+	exit -6
+fi
+parted_output=$(echo "$parted_output" | tail -n 1)
 partnum=$(echo "$parted_output" | cut -d ':' -f 1)
 partstart=$(echo "$parted_output" | cut -d ':' -f 2 | tr -d 'B')
 loopback=$(losetup -f --show -o "$partstart" "$img")