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/* $NetBSD: partutil.c,v 1.2 2006/08/27 09:20:53 christos Exp $ */

/*-
* Copyright (c) 2006 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Christos Zoulas.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 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/cdefs.h>
__RCSID("$NetBSD: partutil.c,v 1.2 2006/08/27 09:20:53 christos Exp $");

#include <sys/types.h>
#include <sys/disklabel.h>
#include <sys/disk.h>
#include <sys/ioctl.h>
#include <sys/stat.h>

#include <disktab.h>
#include <fcntl.h>
#include <util.h>
#include <unistd.h>
#include <err.h>
#include <string.h>
#include <errno.h>

#include "partutil.h"

static void
label2geom(struct disk_geom *geo, const struct disklabel *lp)
{
geo->dg_secperunit = lp->d_secperunit;
geo->dg_secsize = lp->d_secsize;
geo->dg_nsectors = lp->d_nsectors;
geo->dg_ntracks = lp->d_ntracks;
geo->dg_ncylinders = lp->d_ncylinders;
geo->dg_secpercyl = lp->d_secpercyl;
geo->dg_pcylinders = lp->d_ncylinders;
geo->dg_sparespertrack = lp->d_sparespertrack;
geo->dg_sparespercyl = lp->d_sparespercyl;
geo->dg_acylinders = lp->d_acylinders;
}

static void
part2wedge(struct dkwedge_info *dkw, const struct disklabel *lp, const char *s)
{
struct stat sb;
const struct partition *pp;
int ptn;

(void)memset(dkw, 0, sizeof(*dkw));
if (stat(s, &sb) == -1)
return;

ptn = strchr(s, '\0')[-1] - 'a';
if (ptn >= lp->d_npartitions || ptn != DISKPART(sb.st_rdev))
return;

pp = &lp->d_partitions[ptn];
dkw->dkw_offset = pp->p_offset;
dkw->dkw_size = pp->p_size;
dkw->dkw_parent[0] = '*';
switch (pp->p_fstype) {
default:
(void)strcpy(dkw->dkw_ptype, DKW_PTYPE_UNKNOWN);
break;
case FS_UNUSED:
(void)strcpy(dkw->dkw_ptype, DKW_PTYPE_UNUSED);
break;
case FS_SWAP:
(void)strcpy(dkw->dkw_ptype, DKW_PTYPE_SWAP);
break;
case FS_BSDFFS:
(void)strcpy(dkw->dkw_ptype, DKW_PTYPE_FFS);
break;
case FS_BSDLFS:
(void)strcpy(dkw->dkw_ptype, DKW_PTYPE_LFS);
break;
case FS_EX2FS:
(void)strcpy(dkw->dkw_ptype, DKW_PTYPE_EXT2FS);
break;
case FS_ISO9660:
(void)strcpy(dkw->dkw_ptype, DKW_PTYPE_ISO9660);
break;
case FS_ADOS:
(void)strcpy(dkw->dkw_ptype, DKW_PTYPE_AMIGADOS);
break;
case FS_HFS:
(void)strcpy(dkw->dkw_ptype, DKW_PTYPE_APPLEHFS);
break;
case FS_MSDOS:
(void)strcpy(dkw->dkw_ptype, DKW_PTYPE_FAT);
break;
case FS_FILECORE:
(void)strcpy(dkw->dkw_ptype, DKW_PTYPE_FILECORE);
break;
case FS_APPLEUFS:
(void)strcpy(dkw->dkw_ptype, DKW_PTYPE_APPLEUFS);
break;
case FS_NTFS:
(void)strcpy(dkw->dkw_ptype, DKW_PTYPE_NTFS);
break;
}
}

int
getdiskinfo(const char *s, int fd, const char *dt, struct disk_geom *geo,
    struct dkwedge_info *dkw)
{
struct disklabel lab;
struct disklabel *lp = &lab;
char parent[1024];

if (dt) {
lp = getdiskbyname(dt);
if (lp == NULL)
errx(1, "%s: unknown disk type", dt);
goto part;
}

if (ioctl(fd, DIOCGDINFO, lp) == -1) {
if (errno == ENOTTY) {
int pfd;
if (ioctl(fd, DIOCGWEDGEINFO, dkw) == -1) {
warn("ioctl (DIOCGWEDGEINFO)");
goto bad;
}
pfd = opendisk(dkw->dkw_parent, O_RDONLY,
parent, sizeof(parent), 0);
if (pfd == -1) {
warn("Cannot open `%s'", dkw->dkw_parent);
goto bad;
}
if (ioctl(pfd, DIOCGDINFO, lp) != -1) {
(void)close(pfd);
goto label;
} else {
int serrno = errno;
(void)close(pfd);
errno = serrno;
}
}
warn("ioctl (DIOCGDINFO)");
goto bad;
}
part:
part2wedge(dkw, lp, s);
label:
label2geom(geo, lp);
return 0;
bad:
return -1;
}
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