From 84e9d4221168cbce48d9ed6a60e33efa841c16b8 Mon Sep 17 00:00:00 2001
From: Adeeb Shihadeh <adeebshihadeh@gmail.com>
Date: Wed, 1 Oct 2025 19:16:26 -0700
Subject: [PATCH] persistent boot debug logs (#491)

* store debug logs

* lil more

* py
---
 userspace/files/agnos-debug.service | 10 +++++++++
 userspace/services.sh               |  1 +
 userspace/usr/comma/debug.py        | 32 +++++++++++++++++++++++++++++
 userspace/usr/comma/fs_setup.sh     |  3 +++
 4 files changed, 46 insertions(+)
 create mode 100644 userspace/files/agnos-debug.service
 create mode 100755 userspace/usr/comma/debug.py

diff --git a/userspace/files/agnos-debug.service b/userspace/files/agnos-debug.service
new file mode 100644
index 0000000..8dbb59e
--- /dev/null
+++ b/userspace/files/agnos-debug.service
@@ -0,0 +1,10 @@
+[Unit]
+After=local-fs.target
+
+[Service]
+Type=oneshot
+User=comma
+ExecStart=/usr/comma/debug.py
+
+[Install]
+WantedBy=multi-user.target
diff --git a/userspace/services.sh b/userspace/services.sh
index 300a088..093b0a6 100755
--- a/userspace/services.sh
+++ b/userspace/services.sh
@@ -10,6 +10,7 @@ systemctl enable cdsprpcd
 systemctl enable fs_setup.service
 systemctl enable serial-hostname.service
 systemctl enable comma.service
+systemctl enable agnos-debug.service
 systemctl enable gpio.service
 systemctl enable lte.service
 systemctl enable sound.service
diff --git a/userspace/usr/comma/debug.py b/userspace/usr/comma/debug.py
new file mode 100755
index 0000000..8bce256
--- /dev/null
+++ b/userspace/usr/comma/debug.py
@@ -0,0 +1,32 @@
+#!/usr/bin/env python3
+
+import os
+import shutil
+from pathlib import Path
+
+ROOT = Path("/cache/debug/")
+
+
+if __name__ == "__main__":
+  boots = sorted(list(ROOT.iterdir()), key=lambda p: int(p.stem, 16), reverse=True)
+
+  # limit to 100 boots
+  for d in boots[100:]:
+    print("cleaning up", d)
+    shutil.rmtree(d)
+
+  # make a directory for this boot
+  n = 0
+  if len(boots):
+    n = int(boots[0].stem, 16) + 1
+  boot_dir = ROOT / f"{n:08x}"
+  boot_dir.mkdir(parents=True)
+
+  # log some stuff
+  pstore = boot_dir / "pstore"
+  pstore.mkdir()
+  os.system(f"cp /sys/fs/pstore/* {pstore} 2>/dev/null")
+
+  os.system(f"uname -a > {boot_dir / 'uname'}")
+  shutil.copyfile("/VERSION", boot_dir / "VERSION")
+
diff --git a/userspace/usr/comma/fs_setup.sh b/userspace/usr/comma/fs_setup.sh
index 50e9a0f..5a033a1 100755
--- a/userspace/usr/comma/fs_setup.sh
+++ b/userspace/usr/comma/fs_setup.sh
@@ -24,6 +24,9 @@ touch /data/etc/localtime
 mkdir -p /data/etc/netplan
 mkdir -p /data/etc/NetworkManager/system-connections
 
+# /cache
+chown -R comma:comma /cache/
+
 # /data/ssh
 mkdir -p /data/ssh
 chown comma: /data/ssh