From c082c8d62be63c7acf31de37c4b87a5b5d8118fa Mon Sep 17 00:00:00 2001
From: tv <tv@krebsco.de>
Date: Thu, 18 Apr 2019 11:31:19 +0200
Subject: krebs.permown: use named pipe

This commit fixes following issues:
1. reexecution causes stray inotifywait processes
2. errors in the while part renderes the service defunct
---
 krebs/3modules/permown.nix | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/krebs/3modules/permown.nix b/krebs/3modules/permown.nix
index 0f2ba86c..63adb223 100644
--- a/krebs/3modules/permown.nix
+++ b/krebs/3modules/permown.nix
@@ -65,17 +65,30 @@ with import <stockholm/lib>;
             find "$ROOT_PATH" -type d -exec chmod "$DIR_MODE" {} +
             find "$ROOT_PATH" -type f -exec chmod "$FILE_MODE" {} +
 
-            inotifywait -mrq -e CREATE --format %w%f "$ROOT_PATH" |
+            paths=/tmp/paths
+            rm -f "$paths"
+            mkfifo "$paths"
+
+            inotifywait -mrq -e CREATE --format %w%f "$ROOT_PATH" > "$paths" &
+            inotifywaitpid=$!
+
+            trap cleanup EXIT
+            cleanup() {
+              kill "$inotifywaitpid"
+            }
+
             while read -r path; do
               if test -d "$path"; then
+                cleanup
                 exec "$0" "$@"
               fi
               chown -h "$OWNER_GROUP" "$path"
               if test -f "$path"; then
                 chmod "$FILE_MODE" "$path"
               fi
-            done
+            done < "$paths"
           '';
+          PrivateTemp = true;
           Restart = "always";
           RestartSec = 10;
           UMask = plan.umask;
-- 
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