summaryrefslogtreecommitdiffstats
path: root/sbin/adjkerntz/adjkerntz.8
diff options
context:
space:
mode:
authorache <ache@FreeBSD.org>1994-11-03 03:16:16 +0000
committerache <ache@FreeBSD.org>1994-11-03 03:16:16 +0000
commita3d03a23fcad822c3d64b7ea33797a5c80d8f19f (patch)
treeee3b33c6a00092caa7f33fccfd1eaebe47f1c82b /sbin/adjkerntz/adjkerntz.8
parent807094f81b96ca85a49aafd4bfd9f992510c6c8c (diff)
downloadFreeBSD-src-a3d03a23fcad822c3d64b7ea33797a5c80d8f19f.zip
FreeBSD-src-a3d03a23fcad822c3d64b7ea33797a5c80d8f19f.tar.gz
-i case goes to background pause and acts like -a case on receiving
SIGTERM. This helps to keep CMOS clock updated before reboot. Idea from J.Wunsch.
Diffstat (limited to 'sbin/adjkerntz/adjkerntz.8')
-rw-r--r--sbin/adjkerntz/adjkerntz.815
1 files changed, 11 insertions, 4 deletions
diff --git a/sbin/adjkerntz/adjkerntz.8 b/sbin/adjkerntz/adjkerntz.8
index 086f12a..9cb5c8d 100644
--- a/sbin/adjkerntz/adjkerntz.8
+++ b/sbin/adjkerntz/adjkerntz.8
@@ -53,18 +53,24 @@ initialization call from
.Pa /etc/rc
(before any daemons are started).
.Nm Adjkerntz
-makes the first adjustment and the initial time zone offset is stored into
+makes the adjustment of kernel clock (CMOS clock not touched)
+and the initial time zone offset is stored into
.Pa adjkerntz
kernel variable
for following subsequent
-.Nm adjkerntz
-calls.
+.Nm "'adjkerntz -a'"
+calls. Then it goes to background pause which ends with SIGTERM.
+After receiving SIGTERM it acts like
+.Nm "'adjkerntz -a'"
+to be shure to have proper CMOS clock before reboot.
.It Cm Fl a
This form is needed, when time zone changes occur.
.Nm Adjkerntz
uses the previously stored
time zone offset and the changed time zone rule to
-produce the new time zone offset, fix the RTC clock and store the new
+produce the new time zone offset, fix the CMOS clock
+(kernel clock not touched)
+and store the new
offset into
.Pa adjkerntz
kernel variable
@@ -73,6 +79,7 @@ It is recommended to use this form in root's
.Xr crontab 5
every half of a hour from 0am to 4am
since this times matches most modern time zone changes.
+.El
.Pp
.Nm Adjkerntz
clears the kernel timezone structure and makes kernel always run at UTC
OpenPOWER on IntegriCloud