Initial commit

programs/sxmo_setpineled.c

@@ -0,0 +1,45 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+void usage() {
+  fprintf(stderr, "Usage: setpineled [red|green|blue] [0-255]\n");
+}
+
+int main(int argc, char *argv[]) {
+  int brightness;
+  char * color;
+  char * command;
+
+  if (argc < 2) {
+    usage();
+    return 1;
+  }
+  argc--;
+  brightness = atoi(argv[argc--]);
+
+  if (brightness < 0 || brightness > 255) {
+    usage();
+    return 1;
+  }
+
+  color = argv[argc--];
+  if (strcmp(color, "red") && strcmp(color, "blue") && strcmp(color, "green")) {
+    usage();
+    return 1;
+  }
+
+  command = malloc(80);
+  sprintf(
+    command,
+    "sh -c 'echo %d > /sys/devices/platform/leds/leds/pinephone:%s:user/brightness'",
+    brightness,
+    color
+  );
+  if (setuid(0)) {
+    fprintf(stderr, "setuid(0) failed\n");
+  } else {
+    return system(command);
+  }
+}