#include <unistd.h>

int main() {
	write(1, "Hello world\n", 13);
}


#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>

int main(int argc, char **argv) {
	// struct stat *buff;
	// stat(argv[1], buff);
	// long int size = buff->st_size;

	int sursa = open(argv[1], O_RDONLY);
	char continut;

	int dest = open(argv[2], O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR);

	while (read(sursa, &continut, 1)) {
		write(dest, &continut, 1);
	}

	close(sursa);
	close(dest);
}