X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=doc%2Frrdgraph_graph.pod;h=6546ab5ba524d058461edf9214ce7322e2ef00bc;hb=a6d79528b4812e8eb3927dba3cdd42e6ca51b287;hp=3c54e24fabf59540eca5732feea9ae177c1a3571;hpb=342b22c3e74a10d7049285c2cea7383676bcfc95;p=rrdtool.git

diff --git a/doc/rrdgraph_graph.pod b/doc/rrdgraph_graph.pod
index 3c54e24..6546ab5 100644
--- a/doc/rrdgraph_graph.pod
+++ b/doc/rrdgraph_graph.pod
@@ -14,6 +14,8 @@ B<COMMENT>B<:>I<text>
 
 B<VRULE>B<:>I<time>B<#>I<color>[B<:>I<legend>]
 
+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<value>[B<#>I<color>][B<:>[I<legend>][B<:STACK>]]
@@ -34,7 +36,6 @@ 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)
 
@@ -49,7 +50,7 @@ Similarly, no report is generated if you don't use print options.
 =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
@@ -63,29 +64,29 @@ For printing values:
 
 =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>
@@ -93,55 +94,115 @@ will all use the same magnitude unit except for zero values.
 
 =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>
 
-B<%%> just prints a literal '%' character
+The day of the year as a decimal number (range 001 to 366).
 
-=item *
+=item B<%m>
 
-B<%a, %A> print the abbreviated or full name of the day of the week.
+The month as a decimal number (range 01 to 12).
 
-=item *
+=item B<%M>
 
-B<%b, %B> print the abbreviated or full name of the month.
+The minute as a decimal number (range 00 to 59).
 
-=item *
+=item B<%p>
 
-B<%d, %m, %y, %H, %M, %S> print day, month, year, hour, minute, and
-second in two-digit format.
+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.
 
-=item *
+=item B<%S>
 
-B<%Y> prints the year in 4-digit format.
+The second as a decimal number (range 00 to 61).
 
-=item *
+=item B<%U>
 
-B<%I, %p> print the hour (01..12), 'am' or 'pm'.
+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.
 
-=item *
+=item B<%V>
 
-B<%j, %w> print day of the week (0..6), day of the year (1..366)
+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.
 
-=item *
+=item B<%w>
 
-B<%c, %x, %X> print date+time, date only, time only.
+The day of the week as a decimal, range 0 to 6, Sunday being 0.  See also %u.
 
-=item *
+=item B<%W>
 
-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.
+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.
 
-=item *
+=item B<%x>
 
-B<%Z> prints the time zone.
+The preferred date representation for the current locale without the time.
+
+=item B<%X>
+
+The preferred time representation for the current locale without the date.
+
+=item B<%y>
+
+The year as a decimal number without a century (range 00 to 99).
+
+=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.
@@ -167,18 +228,20 @@ Text is printed literally in the legend section of the graph. Note that in
 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<HRULE>B<:>I<value>B<#>I<color> [ :I<legend> ]
+
+Draw a horyzontal 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
@@ -281,6 +344,9 @@ Valid markers are: B<\j> for justified, B<\l> for left aligned, B<\r> for
 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