freebsd-dev/usr.bin/mkimg/format.c
Marcel Moolenaar 4537ca4ef6 Don't resize again prior to writing. Resizing may not be idempotent
and no scheme adjusts the size after the format resized the image
the first time.
2015-06-21 01:35:32 +00:00

88 lines
2.2 KiB
C

/*-
* Copyright (c) 2014 Juniper Networks, 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 AUTHOR 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 AUTHOR 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>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/linker_set.h>
#include <sys/queue.h>
#include <sys/stat.h>
#include <err.h>
#include <errno.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "image.h"
#include "format.h"
#include "mkimg.h"
static struct mkimg_format *format;
int
format_resize(lba_t end)
{
if (format == NULL)
return (ENOSYS);
return (format->resize(end));
}
int
format_select(const char *spec)
{
struct mkimg_format *f, **iter;
SET_FOREACH(iter, formats) {
f = *iter;
if (strcasecmp(spec, f->name) == 0) {
format = f;
return (0);
}
}
return (EINVAL);
}
struct mkimg_format *
format_selected(void)
{
return (format);
}
int
format_write(int fd)
{
int error;
if (format == NULL)
return (ENOSYS);
error = format->write(fd);
return (error);
}