-=pod
+=pod
-=head1 NAME
+=head1 NAME
rrdgraph_graph - rrdtool graph command reference
B<VRULE>B<:>I<time>B<#>I<color>[B<:>I<legend>]
-B<LINE>[I<width>]B<:>I<vname>B<#>I<color>[B<:>I<legend>][B<:>B<STACK>]
+B<HRULE>B<:>I<value>B<#>I<color>[B<:>I<legend>]
+
+B<LINE>[I<width>]B<:>I<value>[B<#>I<color>][B<:>[I<legend>][B<:STACK>]]
-B<AREA>B<:>I<vname>B<#>I<color>[B<:>I<legend>][B<:>B<STACK>]
+B<AREA>B<:>I<value>[B<#>I<color>][B<:>[I<legend>][B<:STACK>]]
B<TICK>B<:>I<vname>B<#>I<rrggbb>[I<aa>][B<:>I<fraction>[B<:>I<legend>]]
B<SHIFT>B<:>I<vname>B<:>I<offset>
-=cut
-
-B<PART>B<:>I<vname>B<#>I<rrggbb>[I<aa>][B<:>I<legend>]
-
-=pod
+B<TEXTALIGN>B<:>{B<left>|B<right>|B<justified>|B<center>}
B<PRINT>B<:>I<vname>B<:>I<CF>B<:>I<format> (deprecated)
B<GPRINT>B<:>I<vname>B<:>I<CF>B<:>I<format> (deprecated)
-B<HRULE>B<:>I<value>B<#>I<color>[B<:>I<legend>] (deprecated)
-
B<STACK>B<:>I<vname>B<#>I<color>[B<:>I<legend>] (deprecated)
=head1 DESCRIPTION
=over 4
-=item B<PRINT:>I<vname>B<:>I<format>
+=item B<PRINT:>I<vname>B<:>I<format>[B<:strftime>]
Depending on the context, either the value component or the time
component of a B<VDEF> is printed using I<format>. It is an error
=over 4
-=item *
+=item B<%%>
-B<%%> just prints a literal '%' character
+just prints a literal '%' character
-=item *
+=item B<%#.#le>
-B<%#.#le> prints numbers like 1.2346e+04. The optional integers # denote field
+prints numbers like 1.2346e+04. The optional integers # denote field
width and decimal precision.
-=item *
+=item B<%#.#lf>
-B<%#.#lf> prints numbers like 12345.6789, with optional field width
+prints numbers like 12345.6789, with optional field width
and precision.
-=item *
+=item B<%s>
-B<%s> place this after B<%le>, B<%lf> or B<%lg>. This will be replaced by the
+place this after B<%le>, B<%lf> or B<%lg>. This will be replaced by the
appropriate SI magnitude unit and the value will be scaled
accordingly (123456 -> 123.456 k).
-=item *
+=item B<%S>
-B<%S> is similar to B<%s>. It does, however, use a previously defined
+is similar to B<%s>. It does, however, use a previously defined
magnitude unit. If there is no such unit yet, it tries to define
one (just like B<%s>) unless the value is zero, in which case the magnitude
unit stays undefined. Thus, formatter strings using B<%S> and no B<%s>
=back
-For printing times:
+If you PRINT a VDEF value, you can also print the time associated with it by appending the string
+B<:strftime> to the format. Note that rrdtool uses the strftime function of your OSs clibrary. This means that
+the conversion specifier may vary. Check the manual page if you are uncertain. The following is a list of
+conversion specifiers usually supported across the board.
=over 4
-=item *
+=item B<%a>
+
+The abbreviated weekday name according to the current locale.
+
+=item B<%A>
+
+The full weekday name according to the current locale.
+
+=item B<%b>
+
+The abbreviated month name according to the current locale.
+
+=item B<%B>
+
+The full month name according to the current locale.
+
+=item B<%c>
+
+The preferred date and time representation for the current locale.
+
+=item B<%d>
+
+The day of the month as a decimal number (range 01 to 31).
+
+=item B<%H>
+
+The hour as a decimal number using a 24-hour clock (range 00 to 23).
+
+=item B<%I>
+
+The hour as a decimal number using a 12-hour clock (range 01 to 12).
+
+=item B<%j>
+
+The day of the year as a decimal number (range 001 to 366).
+
+=item B<%m>
+
+The month as a decimal number (range 01 to 12).
+
+=item B<%M>
+
+The minute as a decimal number (range 00 to 59).
-B<%%> just prints a literal '%' character
+=item B<%p>
-=item *
+Either `AM' or `PM' according to the given time value, or the corresponding
+strings for the current locale. Noon is treated as `pm' and midnight as
+`am'. Note that in many locales and `pm' notation is unsupported and in
+such cases %p will return an empty string.
-B<%a, %A> print the abbreviated or full name of the day of the week.
+=item B<%S>
-=item *
+The second as a decimal number (range 00 to 61).
-B<%b, %B> print the abbreviated or full name of the month.
+=item B<%U>
-=item *
+The week number of the current year as a decimal number, range 00 to 53, starting with the
+first Sunday as the first day of week 01. See also %V and %W.
-B<%d, %m, %y, %H, %M, %S> print day, month, year, hour, minute, and
-second in two-digit format.
+=item B<%V>
-=item *
+The ISO 8601:1988 week number of the current year as a decimal number, range 01 to 53, where
+week 1 is the first week that has at least 4 days in the current year, and with Monday as the
+first day of the week. See also %U and %W.
-B<%Y> prints the year in 4-digit format.
+=item B<%w>
-=item *
+The day of the week as a decimal, range 0 to 6, Sunday being 0. See also %u.
-B<%I, %p> print the hour (01..12), 'am' or 'pm'.
+=item B<%W>
-=item *
+The week number of the current year as a decimal number, range 00 to 53, starting with the
+first Monday as the first day of week 01.
-B<%j, %w> print day of the week (0..6), day of the year (1..366)
+=item B<%x>
-=item *
+The preferred date representation for the current locale without the time.
-B<%c, %x, %X> print date+time, date only, time only.
+=item B<%X>
-=item *
+The preferred time representation for the current locale without the date.
-B<%U, %W> number of the week of the current year, with either the
-first Sunday (%U) or the first Monday (%W) determining the first week.
+=item B<%y>
-=item *
+The year as a decimal number without a century (range 00 to 99).
-B<%Z> prints the time zone.
+=item B<%Y>
+
+The year as a decimal number including the century.
+
+=item B<%Z>
+
+The time zone or name or abbreviation.
+
+=item B<%%>
+
+A literal `%' character.
=back
-=item B<PRINT:>I<vname>B<:>I<CF><:>I<format>
+=item B<PRINT:>I<vname>B<:>I<CF>B<:>I<format>
I<Deprecated. Use the new form of this command in new scripts.>
The first form of this command is to be used with B<CDEF> I<vname>s.
RRDtool 1.2 you have to escape colons in COMMENT text in the same way you
have to escape them in B<*PRINT> commands by writing B<'\:'>.
-=item B<HRULE>B<:>I<value>B<#>I<color> [ :I<legend> ]
-
-I<Deprecated. Use B<LINE> in new scripts.>
-
=item B<VRULE>B<:>I<time>B<#>I<color> [B<:>I<legend> ]
Draw a vertical line at I<time>. Its color is composed from three
hexadecimal numbers specifying the rgb color components (00 is off, FF is
-maximum) red, green and blue. Optionally, a legend box and string is
+maximum) red, green and blue followed by an optional alpha. Optionally, a legend box and string is
printed in the legend section. I<time> may be a number or a variable
from a B<VDEF>. It is an error to use I<vname>s from B<DEF> or B<CDEF> here.
-=item B<LINE>[I<width>]B<:>I<{vname or number}>B<#>I<color>[B<:>I<legend>]
-[ C<:STACK> ]
+=item B<HRULE>B<:>I<value>B<#>I<color> [ :I<legend> ]
+
+Draw a horizontal line at I<value>. HRULE acts much like LINE except that
+will have no effect on the scale of the graph. If a HRULE is outside the
+graphing area it will just not be visible.
+
+=item B<LINE>[I<width>]B<:>I<value>[B<#>I<color>][B<:>[I<legend>][B<:STACK>]]
Draw a line of the specified width onto the graph. I<width> can be a
floating point number. If the color is not specified, the drawing is done
'invisibly'. This is useful when stacking something else on top of this
line. Also optional is the legend box and string which will be printed in
-the legend section if specified. The B<vname> can be generated by B<DEF>,
+the legend section if specified. The B<value> can be generated by B<DEF>,
B<VDEF>, and B<CDEF>. If the optional B<STACK> modifier is used, this line
is stacked on top of the previous element which can be a B<LINE> or an
-B<AREA>
+B<AREA>.
-=item B<AREA>B<:>I<vname>B<#>I<rrggbb>[I<aa>][B<:>I<legend>][B<:STACK>]
+When you do not specify a color, you cannot specify a legend. Should
+you want to use STACK, use the "LINEx:<value>::STACK" form.
+
+=item B<AREA>B<:>I<value>[B<#>I<color>][B<:>[I<legend>][B<:STACK>]]
See B<LINE>, however the area between the x-axis and the line will
be filled.
=item B<TICK>B<:>I<vname>B<#>I<rrggbb>[I<aa>][B<:>I<fraction>[B<:>I<legend>]]
Plot a tick mark (a vertical line) for each value of I<vname> that is
-non-zero and not *UNKNOWN*. The I<fraction> argument specifies the
-length of the tick mark as a fraction of the y-axis; the default value
-is 0.1 (10% of the axis). Note that the color specification is not
-optional.
+non-zero and not *UNKNOWN*. The I<fraction> argument specifies the length of
+the tick mark as a fraction of the y-axis; the default value is 0.1 (10% of
+the axis). Note that the color specification is not optional. The TICK marks normaly
+start at the lower edge of the graphing area. If the fraction is negative they start
+at the upper border of the graphing area.
=item B<SHIFT>B<:>I<vname>B<:>I<offset>
As with the other graphing elements, you can specify a number or
a variable here.
+=item B<TEXTALIGN>B<:>{B<left>|B<right>|B<justified>|B<center>}
+
+Labels are placed below the graph. When they overflow to the left, they wrap
+to the next line. By default, lines are justified left and right. The
+B<TEXTALIGN> function lets you change this default. This is a command and
+not an option, so that you can change the default several times in your
+argument list.
+
=cut
# This section describes the curruently defunct
on top of the previous element. There must be something to stack
upon.
-You can use an B<invisible> LINE or AREA to stacked upon.
+You can use an B<invisible> LINE or AREA to stacked upon.
An B<unknown> value makes the entire stack unknown from that moment on.
You don't know where to begin (the unknown value) and therefore do
right aligned, and B<\c> for centered. In the next section there is an
example showing how to use centered formatting.
+B<\n> is a valid alias for B<\l> since incomplete parsing in earlier
+versions of rrdtool lead to this behaviour and a number of people has been using it.
+
Normally there are two space characters inserted between every two items
printed into the graph. The space following a string can be suppressed by
putting a B<\g> at the end of the string. The B<\g> also ignores any space
the tabs inserted are relative to the start of the current legend
element!
+Since RRDtool 1.3 is using Pango for rending text, you can use Pango markup.
+Pango uses the xml B<span> tags for inline formatting instructions.:
+
+A simple example of a marked-up string might be:
+
+ <span foreground="blue" size="x-large">Blue text</span> is <i>cool</i>!
+
+The complete list of attributes for the span tag (taken from the pango documentation):
+
+=over
+
+=item B<font_desc>
+
+A font description string, such as "Sans Italic 12"; note that any other span attributes will override this description. So if you have "Sans Italic" and also a style="normal" attribute, you will get Sans normal, not italic.
+
+=item B<font_family>
+
+A font family name
+
+=item B<face>
+
+Synonym for font_family
+
+=item B<size>
+
+Font size in 1024ths of a point, or one of the absolute sizes 'xx-small', 'x-small', 'small', 'medium', 'large', 'x-large', 'xx-large', or one of the relative sizes 'smaller' or 'larger'. If you want to specify a absolute size, it's usually easier to take advantage of the ability to specify a partial font description using 'font_desc'; you can use font_desc='12.5' rather than size='12800'.
+
+=item B<style>
+
+One of 'normal', 'oblique', 'italic'
+
+=item B<weight>
+
+One of 'ultralight', 'light', 'normal', 'bold', 'ultrabold', 'heavy', or a numeric weight
+
+=item B<variant>
+
+'normal' or 'smallcaps'
+
+=item B<stretch>
+
+One of 'ultracondensed', 'extracondensed', 'condensed', 'semicondensed', 'normal', 'semiexpanded', 'expanded', 'extraexpanded', 'ultraexpanded'
+
+=item B<foreground>
+
+An RGB color specification such as '#00FF00' or a color name such as 'red'
+
+=item B<background>
+
+An RGB color specification such as '#00FF00' or a color name such as 'red'
+
+=item B<underline>
+
+One of 'none', 'single', 'double', 'low', 'error'
+
+=item B<underline_color>
+
+The color of underlines; an RGB color specification such as '#00FF00' or a color name such as 'red'
+
+=item B<rise>
+
+Vertical displacement, in 10000ths of an em. Can be negative for subscript, positive for superscript.
+
+=item B<strikethrough>
+
+'true' or 'false' whether to strike through the text
+
+=item B<strikethrough_color>
+
+The color of strikethrough lines; an RGB color specification such as '#00FF00' or a color name such as 'red'
+
+=item B<fallback>
+
+'true' or 'false' whether to enable fallback. If disabled, then characters will only be used from the closest matching font on the system. No fallback will be done to other fonts on the system that might contain the characters in the text. Fallback is enabled by default. Most applications should not disable fallback.
+
+=item B<lang>
+
+A language code, indicating the text language
+
+=item B<letter_spacing>
+
+Inter-letter spacing in 1024ths of a point.
+
+=item B<gravity>
+
+One of 'south', 'east', 'north', 'west', 'auto'.
+
+=item B<gravity_hint>
+
+One of 'natural', 'strong', 'line'.
+
+=back
+
+To save you some typing, there are also some shortcuts:
+
+=over
+
+=item B<b>
+
+Bold
+
+=item B<big>
+
+Makes font relatively larger, equivalent to <span size="larger">
+
+=item B<i>
+
+Italic
+
+=item B<s>
+
+Strikethrough
+
+=item B<sub>
+
+Subscript
+
+=item B<sup>
+
+Superscript
+
+=item B<small>
+
+Makes font relatively smaller, equivalent to <span size="smaller">
+
+=item B<tt>
+
+Monospace font
+
+=item B<u>
+
+Underline
+
+=back
+
=head1 SEE ALSO
L<rrdgraph> gives an overview of how B<rrdtool graph> works.
=head1 AUTHOR
-Program by Tobias Oetiker E<lt>oetiker@ee.ethz.chE<gt>
+Program by Tobias Oetiker E<lt>tobi@oetiker.chE<gt>
This manual page by Alex van den Bogaerdt E<lt>alex@ergens.op.het.netE<gt>