3

lib/log.sh

@@ -1,6 +1,19 @@
 #!/usr/bin/env bash
 
 log_init() {
+  local fallback_dir=""
+  local fallback_file=""
+
+  mkdir -p "$RUNTIME_LOG_DIR" 2>/dev/null || true
+  if : > "$RUNTIME_LOG_FILE" 2>/dev/null; then
+    return 0
+  fi
+
+  fallback_dir="${TMPDIR:-/tmp}/postinstall-debian-$(id -u)"
+  fallback_file="$fallback_dir/install.log"
+  mkdir -p "$fallback_dir"
+  RUNTIME_LOG_DIR="$fallback_dir"
+  RUNTIME_LOG_FILE="$fallback_file"
   : > "$RUNTIME_LOG_FILE"
 }