Which characters in a Nagios plugin output need escaping other than pipe (|)?
How do I escape the pipe character and others?
The development guidelines do not specify a way to escape the
The syntax of the first line is fix and not very flexible
SERVICE STATUS: First line of output | First part of performance data
and then in section 2.6 (Performance Data)
Nagios 3 and newer will concatenate the parts following a "|" in a) the first line output by the plugin, and b) in the second to last line, into a string it passes to whatever performance data processing it has configured.
I would then assume that if you have a
| in the
First line of output part it will just interpreted as the beginning of the performance data.
Since the first line of output is not interpreted (up to the
|) I would also assume that no characters have to be specially handled.
As already mentioned, the
| character is a reserved one to seperate plugin output from performance datas.
There is actually no way to escape it.
Regarding escaping other characters : Nagios uses STDOUT to display the plugin output. This means that it will display it as is.
However there is an exception for the
\ character. You will have to escape it with an extra
For example, to display
c:\Windows\system32 your plugin output should be