@@ -50,172 +58,138 @@ In the end it will printout a web page including the necessary CGI headers.
only for a subset of tags. This allows nesting of tags.The argument parser uses the same semantics as you are used from your C-shell.
Assume that rrdcgi is run as a filter and not as a cgi.
Inserts the CGI variable of the given name.
Inserts the CGI variable of the given name but quotes it, ready for use as an argument in another RRD:: tag. So even when there are spaces in the -value of the CGI variable it will still be considered to be one argument. +value of the CGI variable it will still be considered to be one argument.
Inserts the CGI variable of the given name, quotes it and makes sure it starts neither with a '/' nor contains '..'. This is to make sure that no problematic pathnames can be introduced through the -CGI interface. -
Get the value of an environment variable.
<RRD::GETENV REMOTE_USER>-
might give you the name of the remote user given you are using some sort of access control on the directory.
Specify the number of seconds this page should remain valid. This will prompt the rrdcgi to output a Last-Modified, an Expire and if the number of -seconds is negative a Refresh header. +seconds is negative a Refresh header.
Include the contents of the specified file into the page returned from the cgi.
If you want to present your graphs in another time zone than your own, you +could use
<RRD::SETENV TZ UTC>-
to make sure everything is presented in Universal Time. Note that the values permitted to TZ depend on your OS.
Analog to SETENV but for local variables.
Analog to GETENV but for local variables.
This gets replaced by the last modification time of the selected RRD. The +time is strftime-formatted with the string specified in the second argument.
This gets replaced by the current time of day. The time is +strftime-formatted with the string specified in the argument.
Note that if you return : (colons) from your strftime format you may have to escape them using \ if the time is to be used as an argument to a GRAPH command.
This gets replaced by a strftime-formatted time using the format strftime-format on either start-spec or end-spec depending on whether START or END is specified. Both start-spec and end-spec must be supplied as either could be relative to the other. This is intended to allow pretty titles on graphs with times that are easier for non RRDtool -folks to figure out than ``-2weeks''. -
Note that again, if you return : (colon) from your strftime format, you may have to escape them using \ if the time is to be used as an argument to a GRAPH command.
This tag creates the RRD graph defined by its argument and then is replaced by an appropriate <IMG ... > tag referring to the graph. The --lazy option in RRD graph can be used to make sure that graphs are only regenerated when they are out of date. The arguments -to the RRD::GRAPH tag work as described in the rrdgraph manual page. -
Use the --lazy option in your RRD::GRAPH tags, to reduce the load on your server. This option makes sure that graphs are only regenerated when the old ones are out of date.
-If you do not specify your own --imginfo format, the following will be used:
-<IMG SRC="%s" WIDTH="%lu" HEIGHT="%lu">-
Note that %s stands for the filename part of the graph generated, all directories given in the PNG file argument will get dropped.
If the preceding RRD::GRAPH tag contained and PRINT arguments, then you can access their output with this tag. The number argument refers to the -number of the PRINT argument. This first PRINT has number 0. +number of the PRINT argument. This first PRINT has number 0.
This tag gets replaced by an internal var. Currently these vars are known: VERSION, COMPILETIME. -These vars represent the compiled-in values. +These vars represent the compiled-in values.