/*
 * spool.c - Send a file to a Roland MDX series CNC mill
 *
 * Written 2009, 2010, 2012 by Werner Almesberger
 * Copyright 2009, 2010, 2012 Werner Almesberger
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */


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

#include "serial.h"


#define	DEFAULT_PORT	"/dev/ttyS0"
#define BUF_SIZE	8192


static void spool_file(FILE *file)
{
	char buf[BUF_SIZE+1];
	size_t n;

	while (1) {
		n = fread(buf, 1, BUF_SIZE, file);
		if (!n)
			break;
		buf[n] = 0;
		serial_printf("%s", buf);
	}
}


static void usage(const char *name)
{
	fprintf(stderr, "usage: %s [file ...]\n", name);
	exit(1);
}


int main(int argc, const char **argv)
{
	FILE **files;
	char *port;
	int n_files, i;

	/*
	 * Open all files before starting to spool, so that we don't risk
	 * failing in the middle of the job.
	 */
	n_files = argc == 1 ? 1 : argc-1;
	files = malloc(sizeof(FILE *));
	if (!files) {
		perror("malloc");
		exit(1);
	}

	if (argc == 1) {
		*files = stdin;
	} else {
		if (*argv[1] == '-')
			usage(*argv);
		for (i = 0; i != n_files; i++) {
			files[i] = fopen(argv[i+1], "r");
			if (!files[i]) {
				perror(argv[i+1]);
				exit(1);
			}
		}
	}

	port = getenv("PORT");
	serial_open(port ? port : DEFAULT_PORT);
	for (i = 0; i != n_files; i++)
		spool_file(files[i]);
sleep(3600);
	serial_close();
	return 0;
}