mark -qo (without argument) obsolete Its behavior (online detect and send over the available route) is included in -q. In the -qo case no local mail would be sent, but why would be not want to do so? We might use -qo (without arg) for something more useful in the future.

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

#include "base64.h"

int
main()
{
	gchar line[100];
	gchar *buf;
	gint size;

	while (fgets(line, 100, stdin)) {
		buf = base64_decode(line, &size);
		fwrite(buf, size, 1, stdout);
		g_free(buf);
	}
	exit(0);
}