/*	$NetBSD: file2swp.c,v 1.9 2016/03/12 02:17:05 dholland Exp $	*/

/*-
 * Copyright (c) 2002 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/types.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include "libtos.h"
#include "diskio.h"
#include "ahdilbl.h"
#include "disklbl.h"
#include "cread.h"

char		*Infile = "minifs.gz";
const char	version[] = "$Revision: 1.9 $";

extern const char	*program_name;

int		main    PROTO((int, char **));
static int	check_bsdlabel PROTO((disk_t *,u_int32_t,u_int32_t *,u_int32_t *));
static int	readdisklabel PROTO((disk_t *, u_int32_t *, u_int32_t *));
static void	usage PROTO((void)) NORETURN;

static void
usage(void)
{
	eprintf("Usage: %s [OPTIONS] DISK\n"
		"where OPTIONS are:\n"
		"\t-V         display version information\n"
		"\t-f FILE    File to copy. The FILE may be a gzipped file.\n"
		"\t           If not specified, it defaults to minifs.gz.\n"
		"\t-h         display this help and exit\n"
		"\t-o FILE    send output to FILE instead of stdout\n"
		"\t-w         wait for key press before exiting\n\n"
		"DISK is the concatenation of BUS, TARGET and LUN.\n"
		"BUS is one of `i' (IDE), `a' (ACSI) or `s' (SCSI).\n"
		"TARGET and LUN are one decimal digit each. LUN must\n"
		"not be specified for IDE devices and is optional for\n"
		"ACSI/SCSI devices (if omitted, LUN defaults to 0).\n\n"
		"Examples:  a0  refers to ACSI target 0 lun 0\n"
		"           s21 refers to SCSI target 2 lun 1\n"
		, program_name);
	xexit(EXIT_SUCCESS);
}

int
main(int argc, char **argv)
{
	extern int	optind;
	extern char	*optarg;

	disk_t		*dd;
	int		rv, c, fd;
	u_int32_t	currblk;
	u_int32_t	start, end;
	char		buf[AHDI_BSIZE];

	rv = 0;
	init_toslib(*argv);

	while ((c = getopt(argc, argv, "Vf:ho:w")) != -1) {
		switch (c) {
		  case 'f':
			Infile = optarg;
			break;
		  case 'o':
			redirect_output(optarg);
			break;
		  case 'w':
		  	set_wait_for_key();
			break;
		  case 'V':
			error(-1, "%s", version);
			break;
			/* NOT REACHED */
		  case 'h':
		  default:
			usage();
			/* NOT REACHED */
		}
	}
	argv += optind;

	if (!*argv) {
		error(-1, "missing DISK argument");
		usage();
		/* NOT REACHED */
	}
	dd = disk_open(*argv);

	if (readdisklabel(dd, &start, &end) != 0)
		xexit(1);

	if ((fd = open(Infile, O_RDONLY)) < 0) {
		eprintf("Unable to open <%s>\n", Infile);
		xexit(1);
	}
	
	switch(key_wait("Are you sure (y/n)? ")) {
	  case 'y':
	  case 'Y':
		currblk = start;
		while ((c = read(fd, buf, sizeof(buf))) > 0) {
		    if (disk_write(dd, currblk, 1, buf) < 0) {
			eprintf("Error writing to swap partition\n");
			xexit(1);
		    }
		    if (++currblk >= end) {
			eprintf("Error: filesize exceeds swap "
							"partition size\n");
			xexit(1);
		    }
		}
		close(fd);
		eprintf("Ready\n");
		xexit(0);
		break;
	  default :
		eprintf("Aborted\n");
		break;
	}
	rv = EXIT_FAILURE;
	return(rv);
}

static int
check_bsdlabel(disk_t *dd, u_int32_t offset, u_int32_t *start, u_int32_t *end)
{
	struct disklabel	dl;
	int					err;
	
	err = bsd_getlabel(dd, &dl, offset);
	if (err < 0) {
		eprintf("Device I/O error (hardware problem?)\n\n");
		return (-1);
	}
	if (!err) {
		if (dl.d_partitions[1].p_size > 0) {
			*start = dl.d_partitions[1].p_offset;
			*end   = *start + dl.d_partitions[1].p_size-1;
			eprintf("NetBSD/Atari format%s, Swap partition start:%d, end:%d\n",
				offset != 0 ? " (embedded)" : "", *start, *end);
			return (0);
		}
		eprintf("NetBSD/Atari format: no swap defined\n");
	}
	return 1;
}

static int
readdisklabel(disk_t *dd, u_int32_t *start, u_int32_t *end)
{
	ptable_t		pt;
	int				err, i;


	err = check_bsdlabel(dd, LABELSECTOR, start, end);
	if (err != 1)
		return (err);
	memset(&pt, 0, sizeof(pt));
	err = ahdi_getparts(dd, &pt, AHDI_BBLOCK, AHDI_BBLOCK);
	if (err < 0) {
		eprintf("Device I/O error (hardware problem?)\n\n");
		return (-1);
	}
	if (!err) {
		/*
		 * Check for hidden BSD labels
		 */
		for (i = 0; i < pt.nparts; i++) {
			if (!strncmp(pt.parts[i].id, "NBD", 3)) {
				err = check_bsdlabel(dd, pt.parts[i].start, start, end);
				if (err != 1)
					return (err);
			}
		}
		for (i = 0; i < pt.nparts; i++) {
			if (!strncmp(pt.parts[i].id, "SWP", 3))
				break;
		}
		if (i < pt.nparts) {
			*start = pt.parts[i].start;
			*end   = pt.parts[i].end;
			eprintf("AHDI format, SWP partition: start:%d,end: %d\n",
				*start, *end);
			return (0);
		}
		eprintf("AHDI format, no swap ('SWP') partition found!\n");
	}
	eprintf("Unknown label format.\n\n");
	return(-1);
}