summaryrefslogtreecommitdiff
path: root/zic.8.txt
diff options
context:
space:
mode:
authorDag-Erling Smørgrav <des@FreeBSD.org>2026-03-02 17:21:42 +0000
committerDag-Erling Smørgrav <des@FreeBSD.org>2026-03-02 17:21:42 +0000
commitcd59570c180e34a6716c2d61a3047ac2f9407795 (patch)
treeb497c0ef940ed1c5c5bed2fa08b87e03d81b7924 /zic.8.txt
parent0d46d875e60091694abe5d38e0cbb4c8019bfd71 (diff)
Diffstat (limited to 'zic.8.txt')
-rw-r--r--zic.8.txt22
1 files changed, 13 insertions, 9 deletions
diff --git a/zic.8.txt b/zic.8.txt
index 2bf66e1aa64d..426978307e88 100644
--- a/zic.8.txt
+++ b/zic.8.txt
@@ -46,23 +46,27 @@ OPTIONS
-L leapsecondfilename
Read leap second information from the file with the given name.
If this option is not used, no leap second information appears
- in output files.
+ in output files; this is required by some TZif readers.
-p timezone
- Use timezone's rules when handling nonstandard TZ strings like
- "EET-2EEST" that lack transition rules. zic will act as if the
- input contained a link line of the form
+ Act as if the input contained a link line of the form
Link timezone posixrules
If timezone is “-” (the default), any already-existing link is
removed.
- Unless timezone is “-”, this option is obsolete and poorly
- supported. Among other things it should not be used for
- timestamps after the year 2037, and it should not be combined
- with -b slim if timezone's transitions are at standard time or
- Universal Time (UT) instead of local time.
+ Unless timezone is “-”, this option is obsolete and is no longer
+ supported by most runtimes. Among other things it should not be
+ used for timestamps after the year 2037, and it should not be
+ combined with -b slim if timezone's transitions are at standard
+ time or Universal Time (UT) instead of local time. The option
+ is present only to support obsolete runtimes that used
+ timezone's rules when handling obsolescent TZ strings like
+ "AST4ADT" that lack transition rules; modern runtimes that
+ support these TZ strings typically just use current US rules as
+ the TZ strings were mainly used in the US. Similarly, any Zone
+ or Link named "posixrules" is obsolete and problematic.
-m mode
Create TZif files with the given file mode bits. By default the