.\" Copyright 1999 Andreas Dilger (adilger@enel.ucalgary.ca)
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.\" Created  Wed Mar 10 17:42:12 1999, Andreas Dilger
.TH UUID_TIME 3 "May 2009" "util-linux-ng" "Libuuid API"
.SH NAME
uuid_time \- extract the time at which the UUID was created
.SH SYNOPSIS
.nf
.B #include <uuid/uuid.h>
.sp
.BI "time_t uuid_time(uuid_t " uu ", struct timeval *" ret_tv )
.fi
.SH DESCRIPTION
The
.B uuid_time
function extracts the time at which the supplied time-based UUID
.I uu
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 the
.BR uuid_generate_time (3)
function.  It may or may not work with UUIDs created by other mechanisms.
.SH "RETURN VALUES"
The time at which the UUID was created, in seconds since January 1, 1970 GMT
(the epoch), is returned (see
.BR time "(2))."
The time at which the UUID was created, in seconds and microseconds since
the epoch, is also stored in the location pointed to by
.I ret_tv
(see
.BR gettimeofday "(2))."
.SH AUTHOR
Theodore Y. Ts'o
.SH AVAILABILITY
.B libuuid
is part of the util-linux-ng package since version 2.15.1 and is available from
ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.
.SH "SEE ALSO"
.BR uuid (3),
.BR uuid_clear (3),
.BR uuid_compare (3),
.BR uuid_copy (3),
.BR uuid_generate (3),
.BR uuid_is_null (3),
.BR uuid_parse (3),
.BR uuid_unparse (3)