File no-suid.patch of Package wiringpi

Author: Dave Jones <dave.jones@canonical.com>
Description: Removed check for root on execution of gpio.
 The wiringPi library already has the ability to use the unprivileged
 /dev/gpiomem device if it can't open /dev/mem so there's no need to require
 root access for the gpio command, and hence no need to set the gpio command
 to have suid root privileges.

Index: b/gpio/gpio.c
===================================================================
--- a/gpio/gpio.c	2020-08-27 10:38:41.019466888 +0200
+++ b/gpio/gpio.c	2020-08-27 10:40:02.110609029 +0200
@@ -1371,12 +1371,6 @@ int main (int argc, char *argv [])
     exit (EXIT_SUCCESS) ;
   }
 
-  if (geteuid () != 0)
-  {
-    fprintf (stderr, "%s: Must be root to run. Program should be suid root. This is an error.\n", argv [0]) ;
-    exit (EXIT_FAILURE) ;
-  }
-
 // Initial test for /sys/class/gpio operations:
 
   /**/ if (strcasecmp (argv [1], "exports"    ) == 0)	{ doExports     (argc, argv) ;	return 0 ; }