From 17e1027ea2184c6ea6961144b064f2779793311d Mon Sep 17 00:00:00 2001
From: Hector Martin <marcan@marcan.st>
Date: Fri, 18 Mar 2022 08:51:42 +0900
Subject: [PATCH] [users] Read product from the device tree on DT platforms

Non-DMI platforms may have a device tree instead (e.g. many embedded
devices, Apple Silicon Macs). If we find a model string in the DT, use
that as a fallback when DMI is not available.

Signed-off-by: Hector Martin <marcan@marcan.st>
---
 src/modules/users/Config.cpp | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/src/modules/users/Config.cpp b/src/modules/users/Config.cpp
index 20c9dea6f..72d765f4b 100644
--- a/src/modules/users/Config.cpp
+++ b/src/modules/users/Config.cpp
@@ -339,15 +339,30 @@ guessProductName()
     if ( !tried )
     {
         QFile dmiFile( QStringLiteral( "/sys/devices/virtual/dmi/id/product_name" ) );
+        QFile modelFile( QStringLiteral( "/proc/device-tree/model" ) );
 
         if ( dmiFile.exists() && dmiFile.open( QIODevice::ReadOnly ) )
         {
             dmiProduct = cleanupForHostname( QString::fromLocal8Bit( dmiFile.readAll().simplified().data() ) );
+            if ( !dmiProduct.isEmpty() )
+            {
+                tried = true;
+                return dmiProduct;
+            }
         }
-        if ( dmiProduct.isEmpty() )
+
+        if ( modelFile.exists() && modelFile.open( QIODevice::ReadOnly ) )
         {
-            dmiProduct = QStringLiteral( "pc" );
+            dmiProduct
+                = cleanupForHostname( QString::fromLocal8Bit( modelFile.readAll().chopped( 1 ).simplified().data() ) );
+            if ( !dmiProduct.isEmpty() )
+            {
+                tried = true;
+                return dmiProduct;
+            }
         }
+
+        dmiProduct = QStringLiteral( "pc" );
         tried = true;
     }
     return dmiProduct;