#define _GNU_SOURCE
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <assert.h>
// ls -i -l /tmp >> log
//
int main(int argc, char *argv[])
{
	int redirection = open("./log",O_WRONLY | O_APPEND | O_CREAT , 0644);
	assert(redirection >= 0);
	// dup2 ferme 1, et duplique redirection
	dup2(redirection,1);
	close(redirection);
	execlp("ls","ls","-i","-l","/tmp",NULL);
	assert(0);
	return 0;
}