[ClamAV] Use tini, check if background procs are running, use pipe to output to stdout

data/Dockerfiles/clamd/bootstrap.sh

@@ -1,14 +1,34 @@
 #!/bin/bash
-touch /var/log/clamav/clamd.log /var/log/clamav/freshclam.log
-chown -R clamav:clamav /var/log/clamav/
 
 if [[ "${SKIP_CLAMD}" =~ ^([yY][eE][sS]|[yY])+$ ]]; then
-	echo "SKIP_CLAMD=y, skipping ClamAV..."
-	sleep 365d
-	exit 0
+  echo "SKIP_CLAMD=y, skipping ClamAV..."
+  sleep 365d
+  exit 0
 fi
 
-freshclam -d &
-clamd &
+# Create log pipes
+touch /var/log/clamav/clamd.log /var/log/clamav/freshclam.log
+mkfifo -m 600 /tmp/logpipe_clamd
+mkfifo -m 600 /tmp/logpipe_freshclam
+chown -R clamav:clamav /var/log/clamav/ /tmp/logpipe_*
+cat <> /tmp/logpipe_clamd 1>&2 &
+cat <> /tmp/logpipe_freshclam 1>&2 &
 
-tail -f /var/log/clamav/clamd.log /var/log/clamav/freshclam.log
+# Prepare
+BACKGROUND_TASKS=()
+
+freshclam -d &
+BACKGROUND_TASKS+=($!)
+
+clamd &
+BACKGROUND_TASKS+=($!)
+
+while true; do
+  for bg_task in ${BACKGROUND_TASKS[*]}; do
+    if ! kill -0 ${bg_task} 1>&2; then
+      echo "Worker ${bg_task} died, stopping container waiting for respawn..."
+      kill -TERM 1
+    fi
+    sleep 10
+  done
+done