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