// Copyright 2009 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. // +build darwin,386 darwin,amd64 dragonfly freebsd linux,!android nacl netbsd openbsd solaris // Parse "zoneinfo" time zone file. // This is a fairly standard file format used on OS X, Linux, BSD, Sun, and others. // See tzfile(5), http://en.wikipedia.org/wiki/Zoneinfo, // and ftp://munnari.oz.au/pub/oldtz/ package time import ( "runtime" "syscall" ) // Many systems use /usr/share/zoneinfo, Solaris 2 has // /usr/share/lib/zoneinfo, IRIX 6 has /usr/lib/locale/TZ. var zoneSources = []string{ "/usr/share/zoneinfo/", "/usr/share/lib/zoneinfo/", "/usr/lib/locale/TZ/", runtime.GOROOT() + "/lib/time/zoneinfo.zip", } func initLocal() { // consult $TZ to find the time zone to use. // no $TZ means use the system default /etc/localtime. // $TZ="" means use UTC. // $TZ="foo" means use /usr/share/zoneinfo/foo. tz, ok := syscall.Getenv("TZ") switch { case !ok: z, err := loadLocation("localtime", []string{"/etc/"}) if err == nil { localLoc = *z localLoc.name = "Local" return } case tz != "" && tz != "UTC": if z, err := loadLocation(tz, zoneSources); err == nil { localLoc = *z return } } // Fall back to UTC. localLoc.name = "UTC" }