freebsd-dev/usr.bin/mkimg/uuid.c
Simon J. Gerraty baf4abfc39 Allow building mkimg as cross-tool
For linux the mmap offset must also be page aligned, and we
need to disable macros like __FBSDID()

Change the linux osdep_uuidgen() to use more portable gettimeofday().

Reviewed by: marcel
2017-03-03 01:56:55 +00:00

126 lines
3.1 KiB
C

/*-
* Copyright (c) 2016 Marcel Moolenaar
* 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 <stdint.h>
#include <stdio.h>
#include <string.h>
#include "endian.h"
#include "image.h"
#include "mkimg.h"
static void osdep_uuidgen(mkimg_uuid_t *);
#ifdef __APPLE__
#include <uuid/uuid.h>
static void
osdep_uuidgen(mkimg_uuid_t *uuid)
{
uuid_generate_time((void *)uuid);
}
#endif /* __APPLE__ */
#ifdef __FreeBSD__
#include <sys/uuid.h>
static void
osdep_uuidgen(mkimg_uuid_t *uuid)
{
uuidgen((void *)uuid, 1);
}
#endif /* __FreeBSD__ */
#ifdef __linux__
#include <stdlib.h>
#include <time.h>
static void
osdep_uuidgen(mkimg_uuid_t *uuid)
{
struct timeval tv;
uint64_t time = 0x01B21DD213814000LL;
u_int i;
uint16_t seq;
if (gettimeofday(&tv, NULL) == -1)
abort();
time += (uint64_t)tv.tv_sec * 10000000LL;
time += tv.tv_usec * 10;
uuid->time_low = (uint32_t)time;
uuid->time_mid = (uint16_t)(time >> 32);
uuid->time_hi_and_version = (uint16_t)(time >> 48) & 0xfff;
uuid->time_hi_and_version |= 1 << 12;
seq = random();
uuid->clock_seq_hi_and_reserved = (uint8_t)(seq >> 8) & 0x3f;
uuid->clock_seq_low = (uint8_t)seq;
for (i = 0; i < 6; i++)
uuid->node[i] = (uint8_t)random();
uuid->node[0] |= 0x01;
}
#endif /* __linux__ */
void
mkimg_uuid(mkimg_uuid_t *uuid)
{
static uint8_t gen[sizeof(mkimg_uuid_t)];
u_int i;
if (!unit_testing) {
osdep_uuidgen(uuid);
return;
}
for (i = 0; i < sizeof(gen); i++)
gen[i]++;
memcpy(uuid, gen, sizeof(*uuid));
}
void
mkimg_uuid_enc(void *buf, const mkimg_uuid_t *uuid)
{
uint8_t *p = buf;
u_int i;
le32enc(p, uuid->time_low);
le16enc(p + 4, uuid->time_mid);
le16enc(p + 6, uuid->time_hi_and_version);
p[8] = uuid->clock_seq_hi_and_reserved;
p[9] = uuid->clock_seq_low;
for (i = 0; i < 6; i++)
p[10 + i] = uuid->node[i];
}