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[check_ajp] Fix "or die" expressions. #90
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Using || ends up binding too tightly to the operand on the left, so the `|| xdie` expressions never do anything because all of those trailing-parameters to system calls are not undefined. Changing them to `or xdie` causes them to actually do what you wanted them to do, which was actually terminate if a system call failed. I discovered this by using `check_ajp` across an stunnel setup where the remote server wouldn't properly handshake. The "pong" result ends up being the literal string `null` for some reason, but the real problem is that `sysread` is throwing a "Connection reset" error. `check_ajp` wasn't dying when `sysread` was throwing an error, so ... it continued and returned an UNKNOWN response.
ChristopherSchultz
changed the title
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Did you have a look into https://github.com/bzed/pkg-nagios-plugins-contrib/blob/master/debian/patches/check_ajp/return_critical_on_failed_connection which patches the script on build time? |
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Using || ends up binding too tightly to the operand on the left, so the
|| xdieexpressions never do anything because all of those trailing-parameters to system calls are not undefined.Changing them to
or xdiecauses them to actually do what you wanted them to do, which was actually terminate if a system call failed.I discovered this by using
check_ajpacross an stunnel setup where the remote server wouldn't properly handshake. The "pong" result ends up being the literal stringnullfor some reason, but the real problem is thatsysreadis throwing a "Connection reset" error.check_ajpwasn't dying whensysreadwas throwing an error, so ... it continued and returned an UNKNOWN response.