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/*-
* Copyright (c) 2012 SRI International
* All rights reserved.
*
* This software was developed by SRI International and the University of
* Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
* ("CTSRD"), as part of the DARPA CRASH research programme.
*
* 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.
*
* $FreeBSD$
*/
#include <sys/types.h>
#include <sys/ioctl.h>
#include <err.h>
#include <fcntl.h>
#include <inttypes.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
/* XXXBED: should install and include sys/dev/isf.h */
struct isf_range {
off_t ir_off; /* Offset of range to delete (set to 0xFF) */
size_t ir_size; /* Size of range */
};
#define ISF_ERASE _IOW('I', 1, struct isf_range)
#define ISF_ERASE_BLOCK (128 * 1024)
static enum {UNSET, ERASE} action = UNSET;
static void
usage(void)
{
fprintf(stderr, "usage: isfctl <device> erase <offset> <size>\n");
exit(1);
}
int
main(int argc, char **argv)
{
struct isf_range ir;
int fd, i;
char *p, *dev;
if (argc < 2)
usage();
argc--; argv++;
if (*argv[0] == '/')
dev = argv[0];
else
asprintf(&dev, "/dev/%s", argv[0]);
argc--; argv++;
fd = open(dev, O_RDWR);
if (fd < 0)
err(1, "unable to open device -- %s", dev);
if (strcmp(argv[0], "erase") == 0) {
if (argc != 3)
usage();
action = ERASE;
ir.ir_off = strtol(argv[1], &p, 0);
if (*p)
errx(1, "invalid offset -- %s", argv[2]);
ir.ir_size = strtol(argv[2], &p, 0);
if (*p)
errx(1, "invalid size -- %s", argv[3]);
/*
* If the user requests to delete less than 32K of space
* then assume that they want to delete a number of 128K
* blocks.
*/
if (ir.ir_size < 32 * 1024)
ir.ir_size *= 128 * 1024;
}
switch (action) {
case ERASE:
i = ioctl(fd, ISF_ERASE, &ir);
if (i < 0)
err(1, "ioctl(%s, %jx, %zx)", dev,
(intmax_t)ir.ir_off, ir.ir_size);
break;
default:
usage();
}
close(fd);
return (0);
}
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