sd_id128_randomize

systemd
sd_id128_randomize 3
sd_id128_randomize Generate 128-bit IDs

    #include <systemd/sd-id128.h>

int `sd_id128_randomize` sd_id128_t *ret

## Description

`sd_id128_randomize()` generates a new randomized 128-bit ID and returns it in ret. Every invocation returns a new randomly generated ID. This uses the getrandom 2 kernel random number generator.

Note that `sd_id128_randomize()` always returns a UUID Variant 1 Version 4 compatible ID. It is hence guaranteed that this function will never return the ID consisting of all zero or all one bits (`SD_ID128_NULL`, `SD_ID128_ALLF`).

For more information about the `sd_id128_t` type, see sd-id128 3.

systemd-id128 1's `new` command may be used as a command line front-end for `sd_id128_randomize()`.

## Return Value

The call returns 0 on success (in which case ret is filled in), or a negative errno-style error code.

## See Also

systemd 1, sd-id128 3, machine-id 5, getrandom 2, random 4, sd_id128_get_machine 3