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author | roberto <roberto@FreeBSD.org> | 1999-12-22 15:24:45 +0000 |
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committer | roberto <roberto@FreeBSD.org> | 1999-12-22 15:24:45 +0000 |
commit | 07fa87617ade0f00e9d60fa4b1079cac165d6059 (patch) | |
tree | daf1c2e9a599e9dfc97305d8b5252e8630bea9b9 /usr.sbin/xntpd/doc/tickadj.8 | |
parent | 5960602b89278a9a46eb40f3716de826681c1072 (diff) | |
download | FreeBSD-src-07fa87617ade0f00e9d60fa4b1079cac165d6059.zip FreeBSD-src-07fa87617ade0f00e9d60fa4b1079cac165d6059.tar.gz |
Bye bye xntpd.
Diffstat (limited to 'usr.sbin/xntpd/doc/tickadj.8')
-rw-r--r-- | usr.sbin/xntpd/doc/tickadj.8 | 124 |
1 files changed, 0 insertions, 124 deletions
diff --git a/usr.sbin/xntpd/doc/tickadj.8 b/usr.sbin/xntpd/doc/tickadj.8 deleted file mode 100644 index 4ba5a09..0000000 --- a/usr.sbin/xntpd/doc/tickadj.8 +++ /dev/null @@ -1,124 +0,0 @@ -.\" $FreeBSD$ -.\" -.Dd December 21, 1993 -.Dt TICKADJ 8 -.Os -.Sh NAME -.Nm tickadj -.Nd fiddle time\-related variables in the kernel -.Sh SYNOPSIS -.Nm tickadj -.Op Fl Adkpqs -.Op Fl a Ar new_tickadj -.Op Fl t Ar new_tick -.Sh DESCRIPTION -The -.Nm -program reads, and optionally modifies, several time\-keeping\-related -variables in the running kernel, via -.Pa /dev/kmem . -The particular variables it is concerned with are -.Em tick , -which is the number of microseconds added to the system time during a -clock interrupt, -.Em tickadj , -which sets the slew rate and resolution used by the -.Xr adjtime 2 -system call, and -.Em dosynctodr , -which indicates to the kernels on some machines whether they should internally -adjust the system clock to keep it in line with time\-of\-day clock -or not. -.Pp -By default, with no arguments, -.Nm -reads the variables of interest in the kernel and prints them. At the -same time it determines an -.Qq optimal -value for the value of the -.Em tickadj -variable if the intent is to run the -.Xr xntpd 8 -Network Time Protocol daemon, and prints this as well. Since the operation -of -.Nm -when reading the kernel mimics the operation of similar parts of the -.Xr xntpd 8 -program fairly closely, this is useful for doing debugging of problems -with -.Xr xntpd 8 Ns . -.Pp -Various flags may be specified to change the variables of interest in -the running kernel: -.Bl -tag -width indent -.It Fl a Ar new_tickadj -Allow one to set the variable -.Em tickadj -to the value specified as an argument. -.It Fl A -Cause -.Em tickadj -to be modified, but instead will set it to the internally computed -.Qq optimal -value. -.It Fl d -Add debugging information. -.It Fl k -Use -.Pa /dev/kmem -instead of -.Pa /kernel . -This is the default. -.It Fl p -Tell -.Nm -to set the value of the variable -.Em noprintf -to one. -.It Fl q -Tell -.Nm -to shut up about everything except errors. Normally -.Nm -is quite verbose about what it is doing. -.It Fl s -Tell -.Nm -to set the value of the variable -.Em dosynctodr -to zero, a prerequisite for running the -.Xr xntpd 8 -daemon under SunOS 4.0. -.It Fl t Ar new_tick -May be used to reset the kernel's value of -.Em tick , -a capability which is useful on machines with very broken clocks. -.El -.Pp -Note that -.Nm -should be run with some caution when being used for the first time on -different types of machines. The operations which -.Nm -trys to perform are not guaranteed to work on all Unix machines. -.Sh FILES -.Bl -tag -width /dev/kmem -compact -.It Pa /kernel -.It Pa /dev/kmem -.El -.Sh SEE ALSO -.Xr xntpd 8 -.Sh HISTORY -Written by -.An Dennis Ferguson -at the University of Toronto. -.Sh BUGS -Fiddling with kernel variables at run time as a part of ordinary -operations is a hideous practice which is only necessary to make -up for deficiencies in the implementation of -.Xr adjtime 2 -in many kernels and/or brokenness of the system clock in some -vendors' kernels. It would be much better if the kernels were fixed -and the -.Nm -program went away. |