mirror of
https://github.com/ventoy/Ventoy.git
synced 2024-11-17 15:25:36 +00:00
51 lines
1.3 KiB
C
51 lines
1.3 KiB
C
|
/******************************************************************************
|
||
|
|
* vtoy_gen_uuid.c
|
||
|
|
*
|
||
|
|
* Copyright (c) 2020, longpanda <admin@ventoy.net>
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or
|
||
|
|
* modify it under the terms of the GNU General Public License as
|
||
|
|
* published by the Free Software Foundation; either version 3 of the
|
||
|
|
* License, or (at your option) any later version.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope that it will be useful, but
|
||
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
|
|
* General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License
|
||
|
|
* along with this program; if not, see <http://www.gnu.org/licenses/>.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <string.h>
|
||
|
|
#include <errno.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
#include <fcntl.h>
|
||
|
|
|
||
|
|
int main()
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
int fd;
|
||
|
|
unsigned char uuid[16];
|
||
|
|
|
||
|
|
fd = open("/dev/random", O_RDONLY);
|
||
|
|
if (fd < 0)
|
||
|
|
{
|
||
|
|
srand(time(NULL));
|
||
|
|
for (i = 0; i < 16; i++)
|
||
|
|
{
|
||
|
|
uuid[i] = (unsigned char)(rand());
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
read(fd, uuid, 16);
|
||
|
|
}
|
||
|
|
|
||
|
|
fwrite(uuid, 1, 16, stdout);
|
||
|
|
return 0;
|
||
|
|
}
|