diff options
Diffstat (limited to 'uuid/gen_uuid.c')
-rw-r--r-- | uuid/gen_uuid.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/uuid/gen_uuid.c b/uuid/gen_uuid.c new file mode 100644 index 0000000..8fa7891 --- /dev/null +++ b/uuid/gen_uuid.c @@ -0,0 +1,51 @@ +/* + * gen_uuid.c --- generate a DCE-compatible uuid + * + * Copyright (C) 1996, 1997, 1998, 1999 Theodore Ts'o. + * + * %Begin-Header% + * 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, and the entire permission notice in its entirety, + * including the disclaimer of warranties. + * 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. + * 3. The name of the author may not be used to endorse or promote + * products derived from this software without specific prior + * written permission. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ALL OF + * WHICH ARE HEREBY DISCLAIMED. IN NO EVENT SHALL THE AUTHOR 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 NOT ADVISED OF THE POSSIBILITY OF SUCH + * DAMAGE. + * %End-Header% + */ + +#include <unistd.h> +#include <sys/random.h> + +#include "uuid.h" + +void uuid_generate(uuid_t out) +{ + uuid_t buf; + struct uuid uu; + + getentropy(buf, sizeof(buf)); + uuid_unpack(buf, &uu); + + uu.clock_seq = (uu.clock_seq & 0x3FFF) | 0x8000; + uu.time_hi_and_version = (uu.time_hi_and_version & 0x0FFF) | 0x4000; + uuid_pack(&uu, out); +} |