NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | NOTES | SEE ALSO | COLOPHON
SD_ID128_RANDOMIZE(3) sd_id128_randomize 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 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().
The call returns 0 on success (in which case ret is filled in), or a negative errno-style error code.
These APIs are implemented as a shared library, which can be compiled and linked to with the libsystemd pkg-config(1) file.
systemd(1), sd-id128(3), machine-id(5), getrandom(2), random(4), sd_id128_get_machine(3)
This page is part of the systemd (systemd system and service manager) project. Information about the project can be found at ⟨http://www.freedesktop.org/wiki/Software/systemd⟩. If you have a bug report for this manual page, see ⟨http://www.freedesktop.org/wiki/Software/systemd/#bugreports⟩. This page was obtained from the project's upstream Git repository ⟨https://github.com/systemd/systemd.git⟩ on 2022-12-17. (At that time, the date of the most recent commit that was found in the repository was 2022-12-16.) If you discover any rendering problems in this HTML version of the page, or you believe there is a better or more up-to-date source for the page, or you have corrections or improvements to the information in this COLOPHON (which is not part of the original manual page), send a mail to email@example.com systemd 252 SD_ID128_RANDOMIZE(3)
Pages that refer to this page: sd_bus_set_server(3), sd-id128(3), sd_id128_get_machine(3), systemd.directives(7), systemd.index(7)