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

int
main (int argc, char * * argv)
{
	char * fn = "/dev/clipboard";
	int fd = open (fn, O_RDONLY | O_BINARY, 0);
	if (fd < 0) {
		exit (fd);
	}

	int out_tty = isatty (1);

	int filebuflen = 100;
	argc --;
	if (argc > 0) {
		int ret = sscanf (argv [1], "%d", & filebuflen);
	}
	char * filebuf = malloc (filebuflen + 1);
	filebuf [filebuflen] = 77;
	fprintf (stderr, "filebuflen %d (overflow byte %d)\n", filebuflen, filebuf [filebuflen]);

	int n;
	do {
		n = read (fd, filebuf, filebuflen);
		if (out_tty) {
			filebuf [n] = 0;
			printf ("read %d bytes: <%s> (overflow byte %d)\n", n, filebuf, filebuf [filebuflen]);
		} else {
			fprintf (stderr, "read %d bytes\n", n);
			write (1, filebuf, n);
		}
	} while (n > 0);

	close (fd);
}