From f50f17f1e03c7bffe962205fcbe6e432eb9a0215 Mon Sep 17 00:00:00 2001
From: cozis <francesco.cozzuto@gmail.com>
Date: Sat, 23 May 2026 17:13:39 +0200
Subject: [PATCH] simulator: Implement Simulator.dumpFiles to easily inspect
 the in-memory file system's state

---
 src/file_system.zig | 20 ++++++++++++++++++++
 src/node.zig        |  4 ++++
 src/simulator.zig   |  6 ++++++
 3 files changed, 30 insertions(+)

diff --git a/src/file_system.zig b/src/file_system.zig
index dff4b29..2f507b1 100644
--- a/src/file_system.zig
+++ b/src/file_system.zig
@@ -414,3 +414,23 @@ pub fn fileSize(self: *FileSystem, open_file: *OpenFile) usize {
     _ = self;
     return open_file.entity.bytes.items.len;
 }
+
+fn dumpEntity(entity: *Entity, depth: u32) void {
+    if (entity.is_dir) {
+        for (entity.children.items) |item| {
+            for (0..depth) |_|
+                std.debug.print("  ", .{});
+            std.debug.print("{s}\n", .{ item.getName() });
+            dumpEntity(item.addr, depth+1);
+        }
+    } else {
+        for (0..depth) |_|
+            std.debug.print("  ", .{});
+        std.debug.print("[{s}]", .{ entity.bytes.items });
+    }
+}
+
+pub fn dump(self: *FileSystem) void {
+    dumpEntity(self.root, 0);
+    std.debug.print("\n", .{});
+}
diff --git a/src/node.zig b/src/node.zig
index 5480120..b9dd06b 100644
--- a/src/node.zig
+++ b/src/node.zig
@@ -381,3 +381,7 @@ pub fn closeSocket(self: *Node, handle: Handle) HandleError!void {
     }
     desc.kind = .unused;
 }
+
+pub fn dumpFiles(self: *Node) void {
+    self.file_system.dump();
+}
diff --git a/src/simulator.zig b/src/simulator.zig
index f33e1d4..9cfc6fd 100644
--- a/src/simulator.zig
+++ b/src/simulator.zig
@@ -77,6 +77,12 @@ pub fn scheduleOne(self: *Simulator) bool {
     return self.scheduler.scheduleOne();
 }
 
+pub fn dumpFiles(self: *Simulator) void {
+    for (self.nodes.items) |node| {
+        node.dumpFiles();
+    }
+}
+
 // Reads the first word of a command
 //     "program arg1 arg2 arg3" -> "program"
 fn extractProgramNameFromCommand(command: []const u8) ?[]const u8 {