FRI-OS
example/posix/processes-execl.c

Shows how to execute and external program in a process

#include <stdio.h>
#include <unistd.h>
int main(int argc, const char* argv[])
{
printf("Starting\n");
execlp("ls", "ls", "-l", "-a", ".", NULL);
printf("Something went wrong\n");
return 1;
}