From e9d203ae7b06f02b475faa9779a346f4f4225238 Mon Sep 17 00:00:00 2001
From: jtc42 <jtc9242@gmail.com>
Date: Wed, 27 Nov 2019 19:28:55 +0000
Subject: [PATCH] Better is_raspberrypi

---
 .../api/v2/blueprints/actions/system.py       | 46 ++++++++++++++++---
 1 file changed, 40 insertions(+), 6 deletions(-)

diff --git a/openflexure_microscope/api/v2/blueprints/actions/system.py b/openflexure_microscope/api/v2/blueprints/actions/system.py
index f3c9de79..3b89e8d9 100644
--- a/openflexure_microscope/api/v2/blueprints/actions/system.py
+++ b/openflexure_microscope/api/v2/blueprints/actions/system.py
@@ -1,15 +1,49 @@
 from openflexure_microscope.api.views import MicroscopeView
 
 import subprocess
-import os
+import io
 from sys import platform
 
 
-def is_raspberrypi():
-    if (platform != "linux"):
-        return False
-    else:
-        return (os.uname()[1] == 'raspberrypi')
+def is_raspberrypi(raise_on_errors=False):
+    """
+    Checks if Raspberry Pi.
+    """
+    try:
+        with io.open('/proc/cpuinfo', 'r') as cpuinfo:
+            found = False
+            for line in cpuinfo:
+                if line.startswith('Hardware'):
+                    found = True
+                    label, value = line.strip().split(':', 1)
+                    value = value.strip()
+                    if value not in (
+                        'BCM2708',
+                        'BCM2709',
+                        'BCM2835',
+                        'BCM2836'
+                    ):
+                        if raise_on_errors:
+                            raise ValueError(
+                                'This system does not appear to be a '
+                                'Raspberry Pi.'
+                            )
+                        else:
+                            return False
+            if not found:
+                if raise_on_errors:
+                    raise ValueError(
+                        'Unable to determine if this system is a Raspberry Pi.'
+                    )
+                else:
+                    return False
+    except IOError:
+        if raise_on_errors:
+            raise ValueError('Unable to open `/proc/cpuinfo`.')
+        else:
+            return False
+
+    return True
 
 class ShutdownAPI(MicroscopeView):
     """