From 8084b5f7f6bd76e504478553e1a7c4bfbb78a469 Mon Sep 17 00:00:00 2001
From: Aryeh Hillman <aryeh.hillman@gmail.com>
Date: Wed, 17 Apr 2024 16:42:21 -0700
Subject: [PATCH] Check for sudo in Raspberry/examples/main.c

Before:

```sh
$ ./epd -2.51 0
/***********************************/
bcm2835 init success !!!
Segmentation fault
```

After:
```sh
$ sudo ./epd -2.51 0
/***********************************/
bcm2835 init success !!!
/***********************************/
VCOM value:2510
Display mode:0
...
```
---
 Raspberry/examples/main.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Raspberry/examples/main.c b/Raspberry/examples/main.c
index 330c9f4..235ad45 100644
--- a/Raspberry/examples/main.c
+++ b/Raspberry/examples/main.c
@@ -67,6 +67,12 @@ int main(int argc, char *argv[])
     //Exception handling:ctrl + c
     signal(SIGINT, Handler);
 
+    if (geteuid() != 0) {
+        Debug("Please run with root!\r\n");
+        Debug("Example: sudo ./epd\r\n");
+        exit(1);
+    }
+
     if (argc < 2){
         Debug("Please input VCOM value on FPC cable!\r\n");
         Debug("Example: sudo ./epd -2.51\r\n");