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Previously, a command is built by string concatenation. Here, the
distinction between a value and multiple params got lost. Solve this
by using an array for shell arguments. As the escaping is now removed
from the `rrd_gen_graph` function, the canvas style needs to manually
add those quotes to make the JS code still work. That only supports
double-quotes, so hopefully nobody creates a name with a double quote
as that would break the fragile JS command line parser.
Separate the rrdtool options from the rrdtool graph command to make the
`$graph_type == 'canvas'` option work (it would otherwise not understand
the `rrdtool graph - -a PNG` option).
Merge the SVG and PNG cases as they are the same except for the
Content-Type header.
Fix a missing html escape in a debug style.
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This had nothing to do with an RRD data source.
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From the docs:
"No warning is generated if the variable does not exist. That means empty() is
essentially the concise equivalent to !isset($var) || $var == false."
This reverts commit f2a4593558b3a3ec696e9cc1de93fa898b9521bb.
Reported-By: Benoit Monin (https://github.com/pommi/CGP/commit/f2a4593)
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Fix some potential undefined index errors by using the empty function to
access ds_names in type other than default.
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This problem showed up with IPv6 addresses in the NTP plugin.
Forgotten in commit:
v0.3-51-g330c94f [type: escape colons in filenames used in rrd commandline]
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A colon ':' in a legend argument will mark the end of the legend:
http://oss.oetiker.ch/rrdtool/doc/rrdgraph_graph.en.html#INOTES_on_legend_arguments
Reported-by: Benjamin Dupuis <poil@quake.fr>
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