led-c/main.c

#include<stdio.h>
#include<stdlib.h>
#include<string.h>

#define LED3P "/sys/class/leds/beaglebone:green:usr3"

int main() {
	FILE* fp;
	char fullFile[100];
	//trigger non
	sprintf(fullFile, LED3P "%s", "/trigger");
	fp = fopen(fullFile, "w+");
	fprintf(fp, "%s", "none");
	fclose(fp);
	// Led on
	sprintf(fullFile, LED3P "%s", "/brightness");
	fp = fopen(fullFile, "w+");
	fprintf(fp, "%s", "1");
	fclose(fp);
	printf("Done\n");
	return 0;
}