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/* $OpenBSD: msdos.c,v 1.13 2021/10/06 00:40:39 deraadt Exp $ */
/* $NetBSD: msdos.c,v 1.16 2016/01/30 09:59:27 mlelstv Exp $ */
/*-
* Copyright (c) 2013 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.
*
* 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 <assert.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
#include <string.h>
#include "ffs/buf.h"
#include "msdos/denode.h"
#include "makefs.h"
#include "msdos.h"
#include "msdos/mkfs_msdos.h"
static int msdos_populate_dir(const char *, struct denode *, fsnode *,
fsnode *, fsinfo_t *);
void
msdos_prep_opts(fsinfo_t *fsopts)
{
struct msdos_options *msdos_opt = ecalloc(1, sizeof(*msdos_opt));
const option_t msdos_options[] = {
#define AOPT(_type, _name, _min) { \
.name = # _name, \
.type = _min == -1 ? OPT_STRPTR : \
(_min == -2 ? OPT_BOOL : \
(sizeof(_type) == 1 ? OPT_INT8 : \
(sizeof(_type) == 2 ? OPT_INT16 : \
(sizeof(_type) == 4 ? OPT_INT32 : OPT_INT64)))), \
.value = &msdos_opt->_name, \
.minimum = _min, \
.maximum = sizeof(_type) == 1 ? 0xff : \
(sizeof(_type) == 2 ? 0xffff : \
(sizeof(_type) == 4 ? 0xffffffff : 0x7fffffffffffffffLL)), \
},
ALLOPTS
#undef AOPT
{ .name = NULL }
};
fsopts->fs_specific = msdos_opt;
fsopts->fs_options = copy_opts(msdos_options);
}
void
msdos_cleanup_opts(fsinfo_t *fsopts)
{
free(fsopts->fs_specific);
free(fsopts->fs_options);
}
int
msdos_parse_opts(const char *option, fsinfo_t *fsopts)
{
struct msdos_options *msdos_opt = fsopts->fs_specific;
option_t *msdos_options = fsopts->fs_options;
int rv;
assert(option != NULL);
assert(fsopts != NULL);
assert(msdos_opt != NULL);
rv = set_option(msdos_options, option, NULL, 0);
if (rv == -1)
return rv;
if (strcmp(msdos_options[rv].name, "volume_id") == 0)
msdos_opt->volume_id_set = 1;
else if (strcmp(msdos_options[rv].name, "media_descriptor") == 0)
msdos_opt->media_descriptor_set = 1;
else if (strcmp(msdos_options[rv].name, "hidden_sectors") == 0)
msdos_opt->hidden_sectors_set = 1;
return 1;
}
void
msdos_makefs(const char *image, const char *dir, fsnode *root, fsinfo_t *fsopts)
{
struct msdos_options *msdos_opt = fsopts->fs_specific;
struct mkfsvnode vp, rootvp;
struct msdosfsmount *pmp;
assert(image != NULL);
assert(dir != NULL);
assert(root != NULL);
assert(fsopts != NULL);
/*
* XXX: pick up other options from the msdos specific ones?
* Is minsize right here?
*/
msdos_opt->create_size = MAXIMUM(msdos_opt->create_size,
fsopts->minsize);
msdos_opt->offset = fsopts->offset;
if (msdos_opt->bytes_per_sector == 0) {
if (fsopts->sectorsize == -1)
fsopts->sectorsize = 512;
msdos_opt->bytes_per_sector = fsopts->sectorsize;
} else if (fsopts->sectorsize == -1) {
fsopts->sectorsize = msdos_opt->bytes_per_sector;
} else if (fsopts->sectorsize != msdos_opt->bytes_per_sector) {
err(1, "inconsistent sectorsize -S %u"
"!= -o bytes_per_sector %u",
fsopts->sectorsize, msdos_opt->bytes_per_sector);
}
/* create image */
printf("Creating `%s'\n", image);
if (mkfs_msdos(image, NULL, msdos_opt) == -1)
return;
fsopts->fd = open(image, O_RDWR);
vp.fs = fsopts;
if ((pmp = msdosfs_mount(&vp, 0)) == NULL)
err(1, "msdosfs_mount");
if (msdosfs_root(pmp, &rootvp) != 0)
err(1, "msdosfs_root");
/* populate image */
printf("Populating `%s'\n", image);
if (msdos_populate_dir(dir, VTODE(&rootvp), root, root, fsopts) == -1)
errx(1, "Image file `%s' not created.", image);
bcleanup();
printf("Image `%s' complete\n", image);
}
static int
msdos_populate_dir(const char *path, struct denode *dir, fsnode *root,
fsnode *parent, fsinfo_t *fsopts)
{
fsnode *cur;
char pbuf[PATH_MAX];
assert(dir != NULL);
assert(root != NULL);
assert(fsopts != NULL);
for (cur = root->next; cur != NULL; cur = cur->next) {
if ((size_t)snprintf(pbuf, sizeof(pbuf), "%s/%s", path,
cur->name) >= sizeof(pbuf)) {
warnx("path %s too long", pbuf);
return -1;
}
if ((cur->inode->flags & FI_ALLOCATED) == 0) {
cur->inode->flags |= FI_ALLOCATED;
if (cur != root) {
fsopts->curinode++;
cur->inode->ino = fsopts->curinode;
cur->parent = parent;
}
}
if (cur->inode->flags & FI_WRITTEN) {
continue; // hard link
}
cur->inode->flags |= FI_WRITTEN;
if (cur->child) {
struct denode *de;
if ((de = msdosfs_mkdire(pbuf, dir, cur)) == NULL) {
warn("msdosfs_mkdire %s", pbuf);
return -1;
}
if (msdos_populate_dir(pbuf, de, cur->child, cur,
fsopts) == -1) {
warn("msdos_populate_dir %s", pbuf);
return -1;
}
continue;
} else if (!S_ISREG(cur->type)) {
warnx("skipping non-regular file %s/%s", cur->path,
cur->name);
continue;
}
if (msdosfs_mkfile(pbuf, dir, cur) == NULL) {
warn("msdosfs_mkfile %s", pbuf);
return -1;
}
}
return 0;
}
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