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 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 getrandom2 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-id1283. systemd-id1281's new command may be used as a command line front-end for sd_id128_randomize(). The call returns 0 on success (in which case ret is filled in), or a negative errno-style error code. sd_id128_randomize() was added in version 187. systemd1 sd-id1283 machine-id5 getrandom2 random4 sd_id128_get_machine3