From 7a6bcf996e754fcf8bc3ea80acc23865476044eb Mon Sep 17 00:00:00 2001
From: Ken Moffat <ken@linuxfromscratch.org>
Date: Mon, 20 Aug 2012 23:51:22 +0000
Subject: Correct how timezones are installed - this fixes various errors in
 test-suites. Thanks to Markku Pesonen for noting how Debian install
 timezones.

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@9944 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689
---
 chapter06/glibc.xml | 48 +++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 45 insertions(+), 3 deletions(-)

(limited to 'chapter06')

diff --git a/chapter06/glibc.xml b/chapter06/glibc.xml
index bcab4c5db..11dc4f44c 100644
--- a/chapter06/glibc.xml
+++ b/chapter06/glibc.xml
@@ -315,13 +315,55 @@ EOF</userinput></screen>
     <para>Install timezone data:</para>
 <screen><userinput>tar -xf ../tzdata&tzdata-version;.tar.gz
 
+mkdir -pv /usr/share/zoneinfo/{posix,right} &amp;&amp;
 for tz in etcetera southamerica northamerica europe africa antarctica \
   asia australasia backward pacificnew solar87 solar88 solar89 systemv; do
-    zic -L leapseconds -d /usr/share/zoneinfo -y "sh yearistype.sh" ${tz}
+    zic -L /dev/null -d /usr/share/zoneinfo -y "sh yearistype.sh" ${tz} &amp;&amp;
+    zic -L /dev/null -d /usr/share/zoneinfo/posix -y "sh yearistype.sh" ${tz} &amp;&amp;
+    zic -L leapseconds -d /usr/share/zoneinfo/right -y "sh yearistype.sh" ${tz}
 done
-cp -v *.tab /usr/share/zoneinfo</userinput></screen>
+cp -v zone.tab /usr/share/zoneinfo &amp;&amp;
+zic -d /usr/share/zoneinfo -p America/New_York</userinput></screen>
 
-    <para>One way to determine the local time zone, run the following
+    <variablelist>
+      <title>The meaning of the zic commands:</title>
+
+      <varlistentry>
+        <term><parameter>zic -L /dev/null ...</parameter></term>
+        <listitem>
+          <para>This creates posix timezones, without any leap seconds.  It is
+          conventional to put these in both
+          <filename class="directory">zoneinfo</filename> and
+          <filename class="directory">zoneinfo/posix</filename>. It is
+          necessary to put the POSIX timezones in
+          <filename class="directory">zoneinfo</filename>, otherwise various
+          test-suites will report errors. On an embedded system, where space is
+          tight and you do not intend to ever update the timezones, you could save
+          1.9MB by not using the <filename class="directory">posix</filename>
+          directory, but some applications or test-suites might give less good
+          results</para>
+        </listitem>
+      </varlistentry>
+      <varlistentry>
+        <term><parameter>zic -L leapseconds ...</parameter></term>
+        <listitem>
+          <para>This creates right timezones, including leap seconds. On an
+          embedded system, where space is tight and you do not intend to
+          ever update the timezones, or care about the correct time, you could
+          save 1.9MB by omitting the <filename class="directory">right</filename>
+          directory.</para>
+        </listitem>
+      </varlistentry>
+      <varlistentry>
+        <term><parameter>zic ... -p ...</parameter></term>
+        <listitem>
+          <para>This creates the <filename>posixrules</filename> file.</para>
+        </listitem>
+      </varlistentry>
+    </variablelist>
+
+
+    <para>One way to determine the local time zone is to run the following
     script:</para>
 
 <screen role="nodump"><userinput>tzselect</userinput></screen>
-- 
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