Fix potential permissions error with result file

.github/workflows/test-pinspawn.yml

@@ -30,7 +30,7 @@ jobs:
 
       - name: Grow the image
         id: grow-image
-        uses: ethanjli/[email protected].0
+        uses: ethanjli/[email protected].1
         with:
           image: ${{ steps.download-base.outputs.destination }}
           destination: rpi-os-image.img

README.md

@@ -115,16 +115,17 @@ Note: the system in the container will shut down after the specified commands fi
   uses: ethanjli/[email protected]
   with:
     image: rpi-os-image.img
-    args: |
-      --bind "$(pwd)":/run/external
+    args: --bind "$(pwd)":/run/external
     boot: true
     run: |
-      echo "Waiting for boot to finish..."
-      systemctl is-system-running --wait
-      systemd-analyze
+      while ! systemd-analyze 2>/dev/null; do
+        echo "Waiting for boot to finish..."
+        sleep 5
+      done
       systemd-analyze critical-chain | cat
       systemd-analyze blame | cat
       systemd-analyze plot > /run/external/bootup-timeline.svg
+      echo "Done!"
 
 - name: Upload the bootup timeline to Job Artifacts
   uses: actions/upload-artifact@v4

pinspawn.sh

@@ -166,7 +166,7 @@ if [ ! -z "$boot_run_service" ]; then
   # Check the return code of the shell script
   # Note: this is not needed in unbooted containers because errors there are propagated to the
   # caller of the script
-  if [ ! -f "$boot_tmp_result" ]; then
+  if [ ! "$(sudo cat "$boot_tmp_result" > /dev/null)" ]; then
     echo "Error: $boot_run_service did not store a result indicating success/failure!"
     exit 1
   elif [ "$(sudo cat "$boot_tmp_result")" != "0" ]; then