/* -*- mode: c; c-file-style: "bsd" -*-  */
/* 
 * hsfilebufcat.c -- Write results of reading from a filebuf to stdout.
 * 
 * Copyright (C) 2000 by Martin Pool.
 * 
 * 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.
 * 
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * for more details.
 * 
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc., 59 
 * Temple Place, Suite 330, Boston, MA 02111-1307 USA */


#include "includes.h"
#include "hsync.h"
#include "private.h"


/* hsfilebufcat: write stdin to stdout, using an hs_filebuf_t to do
 * the input.  */


int
main(int argc, char *argv[])
{
    hs_filebuf_t   *infb;
    int             buf_len = 1000;
    char           *buf;
    char           *tail_ptr;
    int             len;
    int             c;
    int             filebuf_loop;

    while ((c = getopt(argc, argv, "lb:")) != -1) {
	switch (c) {
	case '?':
	case ':':
	    return 1;
	case 'l':
	    filebuf_loop = 1;
	    break;
	case 'b':
	    buf_len = strtol(optarg, &tail_ptr, 10);
	    if (*tail_ptr || buf_len < 1) {
		fprintf(stderr, "-b must have an integer argument\n");
		return 1;
	    }
	    break;
	}
    }

    buf = malloc(buf_len);
    assert(buf);

    infb = hs_filebuf_from_fd(STDIN_FILENO);
    assert(infb);

    while (1) {
	if (filebuf_loop) {
	    len = _hs_read_loop(hs_filebuf_read, infb, buf, buf_len);
	} else {
	    len = hs_filebuf_read(infb, buf, buf_len);
	}

	if (len < 0) {
	    perror("error in read");
	    return 1;
	} else if (len == 0) {
	    break;
	} else {
	    write(STDOUT_FILENO, buf, len);
	}
    }

    return 0;
}