1*d32639f6Sjmc.\" $OpenBSD: zdump.8,v 1.3 2022/09/11 06:38:12 jmc Exp $ 2*d32639f6Sjmc.Dd $Mdocdate: September 11 2022 $ 32059035fStedu.Dt ZDUMP 8 42059035fStedu.Os 52059035fStedu.Sh NAME 62059035fStedu.Nm zdump 72059035fStedu.Nd time zone dumper 82059035fStedu.Sh SYNOPSIS 92059035fStedu.Nm zdump 102059035fStedu.Op Fl v 112059035fStedu.Oo 122059035fStedu.Fl c 132059035fStedu.Oo Ar loyear , Oc Ar hiyear 142059035fStedu.Oc 152059035fStedu.Ar zonename ... 162059035fStedu.Sh DESCRIPTION 172059035fStedu.Nm 182059035fSteduprints the current time in each 192059035fStedu.Ar zonename 202059035fStedunamed on the command line. 212059035fStedu.Pp 222059035fSteduThese options are available: 232a110ee1Sschwarze.Bl -tag -width Ds 242059035fStedu.It Xo 252059035fStedu.Fl c 262059035fStedu.Oo Ar loyear , Oc Ar hiyear 272059035fStedu.Xc 282059035fSteduCut off verbose output near the start of the given year(s). 292059035fSteduBy default, 302059035fSteduthe program cuts off verbose output near the start of the years -500 and 2500. 312059035fStedu.It Fl v 322059035fSteduFor each 332059035fStedu.Ar zonename 342059035fSteduon the command line, 352059035fSteduprint the time at the lowest possible time value, 362059035fSteduthe time one day after the lowest possible time value, 372059035fSteduthe times both one second before and exactly at 382059035fStedueach detected time discontinuity, 392059035fSteduthe time at one day less than the highest possible time value, 402059035fSteduand the time at the highest possible time value. 412059035fSteduEach line ends with 422059035fStedu.Dq isdst=1 432059035fSteduif the given time is Daylight Saving Time or 442059035fStedu.Dq isdst=0 452059035fSteduotherwise. 462059035fStedu.El 472059035fStedu.Sh LIMITATIONS 482059035fSteduThe 492059035fStedu.Fl v 502059035fSteduoption may not be used on systems with floating-point 51*d32639f6Sjmc.Vt time_t 522059035fSteduvalues that are neither float nor double. 532059035fStedu.Pp 542059035fSteduTime discontinuities are found by sampling the results returned by localtime 552059035fSteduat twelve-hour intervals. 562059035fSteduThis works in all real-world cases; 572059035fStedu.\" @(#)zdump.8 8.1 582059035fStedu.Sh SEE ALSO 592059035fStedu.Xr ctime 3 , 602059035fStedu.Xr tzfile 5 , 612059035fStedu.Xr zic 8 622059035fStedu.\" This file is in the public domain, so clarified as of 632059035fStedu.\" 2009-05-17 by Arthur David Olson. 64