====== Syntax ======
Hier werden Beispiele für verschiedene Plugin-Syntax dargestellt.

===== Threshold - Range =====
Quelle: [[http://nagiosplug.sourceforge.net/developer-guidelines.html#THRESHOLDFORMAT|http://nagiosplug.sourceforge.net/]]

A range is defined as a start and end point (inclusive) on a numeric scale (possibly negative or positive infinity). 
A threshold is a range with an alert level (either warning or critical). Use the set_thresholds(thresholds *, char *, char *) function to set the thresholds. 

The theory is that the plugin will do some sort of check which returns back a numerical value, or metric, which is then compared to the warning and critical thresholds. Use the get_status(double, thresholds *) function to compare the value against the thresholds. 

This is the generalised format for ranges: 

<code>[@]start:end</code>

Notes: 

  *start ≤ end
  *start and ":" is not required if start=0
  *if range is of format "start:" and end is not specified, assume end is infinity
  *to specify negative infinity, use "~"
  *alert is raised if metric is outside start and end range (inclusive of endpoints)
  *if range starts with "@", then alert if inside this range (inclusive of endpoints)

Note: Not all plugins are coded to expect ranges in this format yet. There will be some work in providing multiple metrics. 

**Table 3. Example ranges**

^ Range definition ^ Generate an alert if x... ^
| 10 | < 0 or > 10, (outside the range of {0 .. 10}) |
| 10: | < 10, (outside {10 .. ∞}) |
| ~:10 | > 10, (outside the range of {-∞ .. 10}) |
| 10:20 | < 10 or > 20, (outside the range of {10 .. 20}) |
| @10:20 | ≥ 10 and ≤ 20, (inside the range of {10 .. 20}) |
| 10 | < 0 or > 10, (outside the range of {0 .. 10}) |