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uuid_time(3) — Linux manual page

UUID_TIME(3)                Programmers ManualUUID_TIME(3)

NAME        top

       uuid_time - extract the time at which the UUID was created

SYNOPSIS        top

#include <uuid.h>time_t uuid_time(const uuid_tuu, struct timeval *ret_tv)

DESCRIPTION        top

       Theuuid_time() function extracts the time at which the supplied       time-based UUIDuu was created. Note that the UUID creation time       is only encoded within certain types of UUIDs. This function can       only reasonably expect to extract the creation time for UUIDs       created with theuuid_generate_time(3) anduuid_generate_time_safe(3) functions. It may or may not work with       UUIDs created by other mechanisms.

RETURN VALUE        top

       The time at which the UUID was created, in seconds since January       1, 1970 GMT (the epoch), is returned (seetime(2)). The time at       which the UUID was created, in seconds and microseconds since the       epoch, is also stored in the location pointed to byret_tv (seegettimeofday(2)).

AUTHORS        top

       Theodore Y. Ts’o

SEE ALSO        top

uuid(3),uuid_clear(3),uuid_compare(3),uuid_copy(3),uuid_generate(3),uuid_is_null(3),uuid_parse(3),uuid_unparse(3)

REPORTING BUGS        top

       For bug reports, use the issue tracker       <https://github.com/util-linux/util-linux/issues>.

AVAILABILITY        top

       Thelibuuidlibrary is part of the util-linux package since       version 2.15.1. It can be downloaded from Linux Kernel Archive       <https://www.kernel.org/pub/linux/utils/util-linux/>. This page is       part of theutil-linux (a random collection of Linux utilities)       project. Information about the project can be found at        ⟨https://www.kernel.org/pub/linux/utils/util-linux/⟩. If you have a       bug report for this manual page, send it to       util-linux@vger.kernel.org. This page was obtained from the       project's upstream Git repository       ⟨git://git.kernel.org/pub/scm/utils/util-linux/util-linux.git⟩ on       2025-08-11. (At that time, the date of the most recent commit that       was found in the repository was 2025-08-05.) 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 isnot part of the original manual page), send a       mail to man-pages@man7.orgutil-linux 2.42-start-521-ec46  2025-08-09UUID_TIME(3)

Pages that refer to this page:uuid(3), uuid_generate(3), uuid_is_null(3), uuid_parse(3), uuid_unparse(3)

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