teres1-ledctrl: add more looops

SOFTWARE/A64-TERES/teres1-ledctrl/teres1-ledctrl.c

@@ -15,6 +15,8 @@
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
 
 #include <linux/input.h>
 
@@ -69,17 +71,14 @@ int main (int argc, char **argv)
 
   device = argv[1];
 
-  if((fd = open(device, O_RDONLY)) == -1)
+  for (;;)
+  {
+    if((fd = open(device, O_RDONLY)) != -1)
     {
-    perror("Could not open input device");
-    exit(255);
-  }
-
       export_gpio(LED_NUM);
       export_gpio(LED_CAPS);
 
-
-  while(read(fd, &ie, sizeof(struct input_event)))
+      while(read(fd, &ie, sizeof(struct input_event)) > 0)
       {
         switch (ie.type)
         {
@@ -97,6 +96,12 @@ int main (int argc, char **argv)
             break;
         }
       }
+    }
 
-  return 0;
+    // something went wrong: rinse and repeat
+    close(fd);
+    usleep(65535u);
+  }
+
+  return 0; // never
 }