From 93f9a8e4da9092ac8cef0e8cd365465485e9ca99 Mon Sep 17 00:00:00 2001 From: Peter Breitenlohner Date: Wed, 22 Jul 2009 11:29:05 +0200 Subject: hwclock.8: formatting Signed-off-by: Peter Breitenlohner --- hwclock/hwclock.8 | 47 ++++++++++++++++++++++++----------------------- 1 file changed, 24 insertions(+), 23 deletions(-) (limited to 'hwclock/hwclock.8') diff --git a/hwclock/hwclock.8 b/hwclock/hwclock.8 index 7f0c53d94..55663fef3 100644 --- a/hwclock/hwclock.8 +++ b/hwclock/hwclock.8 @@ -2,7 +2,9 @@ .SH NAME hwclock \- query and set the hardware clock (RTC) .SH SYNOPSIS -.BR "hwclock [functions] [options]" +.B hwclock +.RI [ functions ] +.RI [ options ] .SH DESCRIPTION .B hwclock @@ -23,7 +25,7 @@ You need exactly one of the following options to tell what function to perform: .PP .TP -.B \-r, \-\-show +.BR \-r , \ \-\-show Read the Hardware Clock and print the time on Standard Output. The time shown is always in local time, even if you keep your Hardware Clock in Coordinated Universal Time. See the @@ -36,7 +38,7 @@ Set the Hardware Clock to the time given by the .B \-\-date option. .TP -.B \-s, \-\-hctosys +.BR \-s , \ \-\-hctosys Set the System Time from the Hardware Clock. Also set the kernel's timezone value to the local timezone @@ -51,7 +53,7 @@ to DST_NONE. (For details on what this field used to mean, see This is a good option to use in one of the system startup scripts. .TP -.B \-w, \-\-systohc +.BR \-w , \ \-\-systohc Set the Hardware Clock to the current System Time. .TP .B \-\-systz @@ -95,12 +97,12 @@ option. See the .B \-\-getepoch option for details. .TP -.B \-v, \-\-version +.BR \-v , \ \-\-version Print the version of .B hwclock on Standard Output. .TP -.B \-\-date=date_string +.BI \-\-date= date_string You need this option if you specify the .B \-\-set option. Otherwise, it is ignored. @@ -118,7 +120,7 @@ Coordinated Universal time. See the option. .TP -.B \-\-epoch=year +.BI \-\-epoch= year Specifies the year which is the beginning of the Hardware Clock's epoch. I.e. the number of years into AD to which a zero value in the Hardware Clock's year counter refers. It is used together with @@ -135,7 +137,7 @@ For example, on a Digital Unix machine: .PP The following options apply to most functions. .TP -.B \-u, \-\-utc +.BR \-u , \ \-\-utc .TP .B \-\-localtime Indicates that the Hardware Clock is kept in Coordinated Universal @@ -155,10 +157,8 @@ nor , the default is whichever was specified the last time .B hwclock was used to set the clock (i.e. hwclock was successfully run with the -.B \-\-set -, -.B \-\-systohc -, +.BR \-\-set , +.BR \-\-systohc , or .B \-\-adjust options), as recorded in the adjtime file. If the adjtime file doesn't @@ -176,11 +176,11 @@ or must be specified when using this option. .TP -.B \-\-adjfile=filename +.BI \-\-adjfile= filename overrides the default /etc/adjtime. .TP -.B \-f, \-\-rtc=filename +.BR \-f , \ \-\-rtc=\fIfilename\fB overrides the default /dev file name, which is .IR /dev/rtc on many platforms but may be @@ -287,9 +287,9 @@ in the option name refers to the Time Of Year facility of the machine. .B \-\-test Do everything except actually updating the Hardware Clock or anything else. This is useful, especially in conjunction with -.B \-\-debug, +.BR \-\-debug , in learning about -.B hwclock. +.BR hwclock . .TP .B \-\-debug Display a lot of information about what @@ -386,7 +386,7 @@ This second field is not used under Linux and is always zero. .SH How hwclock Accesses the Hardware Clock .PP .B hwclock -Uses many different ways to get and set Hardware Clock values. +uses many different ways to get and set Hardware Clock values. The most normal way is to do I/O to the device special file /dev/rtc, which is presumed to be driven by the rtc device driver. However, this method is not always available. For one thing, the rtc driver is @@ -439,7 +439,9 @@ machine, you can force .B hwclock to use the direct manipulation of the CMOS registers without even trying .I /dev/rtc -by specifying the \-\-directisa option. +by specifying the +.B \-\-directisa +option. .SH The Adjust Function @@ -454,7 +456,7 @@ systematic drift. It works like this: .B hwclock keeps a file, -.I /etc/adjtime, +.IR /etc/adjtime , that keeps some historical information. This is called the adjtime file. .PP Suppose you start with no adjtime file. You issue a @@ -478,7 +480,7 @@ day when left alone and that it has been left alone for exactly one day. So it subtracts 2 seconds from the Hardware Clock. It then records the current time as the last time the clock was adjusted. Another 24 hours goes by and you issue another -.I hwclock \-\-adjust. +.IR "hwclock \-\-adjust" . .B Hwclock does the same thing: subtracts 2 seconds and updates the adjtime file with the current time as the last time the clock was adjusted. @@ -486,8 +488,7 @@ with the current time as the last time the clock was adjusted. Every time you calibrate (set) the clock (using .I \-\-set or -.I \-\-systohc -), +.IR \-\-systohc ), .B hwclock recalculates the systematic drift rate based on how long it has been since the last calibration, how long it has been since the last @@ -537,7 +538,7 @@ command line. You can use an adjtime file that was previously used with the .BR clock (8) program with -.B hwclock. +.BR hwclock . .SH "Automatic Hardware Clock Synchronization By the Kernel" -- cgit v1.2.3-55-g7522