CentOS 7.0 - man page for xclock (centos section 1)

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XCLOCK(1)										XCLOCK(1)

NAME
       xclock - analog / digital clock for X

SYNOPSIS
       xclock  [ -help ] [ -analog | -digital ] [ -brief ] [ -chime ] [ -hd color ] [ -hl color ]
       [ -update seconds ] [ -strftime format ] [ -twelve | -twentyfour |  -utime  ]  [  -padding
       number ] [ -norender ] [ -render ] [ -sharp ] [ -face pattern ]

DESCRIPTION
       The  xclock program displays the time in analog or digital form.  The time is continuously
       updated at a frequency which may be specified by the user.

OPTIONS
       Xclock accepts all of the standard X Toolkit command line options  along  with  the  addi-
       tional options listed below:

       -help   This  option  indicates	that  a  brief	summary  of the allowed options should be
	       printed on the standard error.

       -analog This option indicates that a conventional 12 hour clock face with tick  marks  and
	       hands should be used.  This is the default.

       -digital or -d
	       This option indicates that a 24 hour digital clock should be used.

       -brief  This  option  indicates	that  the digital clock should only display the hours and
	       minutes fields.	The default is to show the full time and date information.

       -utime  This option indicates that a digital clock should display seconds since the  Epoch
	       (in format '970012340 seconds since Epoch' instead of a standard 24-hour time.

       -strftime format
	       This  option  allows  an strftime(3) format string to be specified for the digital
	       clock's display.

       -twelve This option indicates that a digital clock should display the time in twelve  hour
	       format.

       -twentyfour
	       This  option indicates that a digital clock should display the time in twenty-four
	       hour format.  This is the default when a digital clock is used.

       -chime  This option indicates that the clock should chime once on the half hour and  twice
	       on the hour.

       -hands color (or -hd color)
	       This  option  specifies the color of the hands on an analog clock.  The default is
	       black.  This option is effectively ignored when Xrender is in use.

       -highlight color (or -hl color)
	       This option specifies the color of the edges of the hands on an analog clock,  and
	       is  only  useful  on color displays.  The default is black.  This option is effec-
	       tively ignored when Xrender is in use.

       -update seconds
	       This option specifies the frequency in seconds at which xclock should  update  its
	       display.   If  the  clock is obscured and then exposed, it will be updated immedi-
	       ately.  A value of 30 seconds or less will enable  a  second  hand  on  an  analog
	       clock.  The default is 60 seconds.

       -padding number
	       This option specifies the width in pixels of the padding between the window border
	       and clock text or picture.  The default is 10 on a digital clock and 8 on an  ana-
	       log clock.

       -render This  option  tells  xclock  to	use the Xrender extension to draw an anti-aliased
	       face. This is the default if xclock has been compiled with Xrender support.   Note
	       that the color selection options and resources used when Xrender is in effect dif-
	       fer from the standard options.

       -norender
	       This option turns off the use of Xrender to draw the clock.

       -sharp  This option tells xclock to use sharper edges when drawn using the Xrender  exten-
	       sion.

       -face pattern
	       This  option  specifies the font to use in digital mode when the Xrender extension
	       is used.  Patterns are specified using the fontconfig face format described in the
	       Font Names section of fonts.conf(5).

X DEFAULTS
       This  program  uses  the  Clock widget.	It understands all of the core resource names and
       classes as well as:

       width (class Width)
	       Specifies the width of the clock.  The default for analog clocks  is  164  pixels;
	       the  default  for digital clocks is whatever is needed to hold the clock when dis-
	       played in the chosen font.

       height (class Height)
	       Specifies the height of the clock.  The default for analog clocks is  164  pixels;
	       the  default  for digital clocks is whatever is needed to hold the clock when dis-
	       played in the chosen font.

       update (class Interval)
	       Specifies the frequency in seconds at which the time should be redisplayed.

       foreground (class Foreground)
	       Specifies the color for the tick marks. The default depends on  whether	reverseV-
	       ideo  is specified.  If reverseVideo is specified the default is lwhite, otherwise
	       the default is black.

       hands (class Foreground)
	       Specifies the color of the insides of the clock's hands. The  default  depends  on
	       whether	reverseVideo  is  specified.  If reverseVideo is specified the default is
	       lwhite, otherwise the default is black.	Note that this resource is not used  when
	       Xrender is in effect.

       highlight (class Foreground)
	       Specifies the color used to highlight the clock's hands. The default is
		depends  on  whether reverseVideo is specified.  If reverseVideo is specified the
	       default is lwhite, otherwise the default is black.  Note that this resource is not
	       used when Xrender is in effect.

       analog (class Boolean)
	       Specifies  whether or not an analog clock should be used instead of a digital one.
	       The default is True.

       twentyfour (class Boolean)
	       Specifies whether or not a digital clock should display the  time  in  twenty-four
	       hour format.  The default is True.

       chime (class Boolean)
	       Specifies whether or not a bell should be rung on the hour and half hour.

       padding (class Margin)
	       Specifies the amount of internal padding in pixels to be used.  The default is 8.

       font (class Font)
	       Specifies  the  font  to  be used for the digital clock.  Note that variable width
	       fonts currently will not always display correctly.  This font is  only  used  when
	       Xrender is not in effect.

       render (class Boolean)
	       Specifies whether or not the Xrender extension should be used for the display. The
	       default is True if xclock has been compiled with Xrender support.

       When Xrender is in effect, the following additional resources are understood:

       face (class FaceName)
	       Specify the pattern for the font to be used for the digital clock when Xrender  is
	       used.	Patterns  are specified using the fontconfig face format described in the
	       Font Names section of fonts.conf(5).

       sharp (class Boolean)
	       Specifies if sharp edges should be used when rendering the clock.  The default  is
	       False.

       buffer (class Boolean)
	       Specifies  that	the updates of the image are drawn to a pixmap before copied into
	       the window instead drawing them into the window directly.

       The defaults of the following color resources depend on whether reverseVideo is specified.
       If reverseVideo is specified the default is lwhite, otherwise the default is black.

       hourColor (class Foreground)
	       The color of the hour hand.

       minuteColor (class Foreground)
	       The color of the minute hand.

       secondColor (class Foreground)
	       The color of the second hand.

       majorColor (class Foreground)
	       The color of the major scale ticks (i. e. each five minutes).

       minorColor (class Foreground)
	       The color of the minor scale ticks (between major ticks).

WIDGETS
       In  order  to  specify  resources, it is useful to know the hierarchy of the widgets which
       compose xclock.	In the notation below, indentation indicates hierarchical structure.  The
       widget class name is given first, followed by the widget instance name.

       XClock  xclock
	    Clock  clock

ENVIRONMENT
       DISPLAY to get the default host and display number.

       XENVIRONMENT
	       to  get	the name of a resource file that overrides the global resources stored in
	       the RESOURCE_MANAGER property.

FILES
       /usr/share/X11/app-defaults/XClock
	      specifies required resources

SEE ALSO
       X(7), xrdb(1), time(3), fonts.conf (5).

BUGS
       Xclock believes the system clock.

       When in digital mode, the string should be centered automatically.

AUTHORS
       Tony Della Fera (MIT-Athena, DEC)
       Dave Mankins (MIT-Athena, BBN)
       Ed Moy (UC Berkeley)

X Version 11				   xclock 1.0.6 				XCLOCK(1)
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