Extenal command file limitation

[Martin Pozdílek]

Hello

It's still problem with max plugin output length in 3.0b6. The increase
of  max plugin output length cap from 4kb to 8kb was announce in Changelog.
The maximum of output is defined by these constants in common.h nagios.h

/*
   NOTE: Plugin length is artificially capped at 8k to prevent runaway
plugins from returning MBs/GBs of data
   back to Nagios.  If you increase the 8k cap by modifying this value,
make sure you also increase the value
   of MAX_EXTERNAL_COMMAND_LENGTH in common.h to allow for passive
checks results received through the external
   command file. EG 10/19/07
*/

#define MAX_PLUGIN_OUTPUT_LENGTH                8192    /* max length of
plugin output (including perf data) */
#define MAX_EXTERNAL_COMMAND_LENGTH             8192    /* max length of
an external command */

But the maximum length of message pushed to nagios through external
command file is limited to 4kb.
You can use this simple bash skript for test this bug.


#!/bin/bash

now=`date +%s`
commandfile='/usr/local/nagios/var/rw/nagios.cmd'
host='host'
service='service'
string='aaaaaaaaaaabbbbbbbbbbbcccccccccccdddddddddddeeeeeeeeeeefffffffffffggggggggggghhhhhhhhhhhiiiiiiiiiiijjjjjjjjjjjkkkkkkkkkkklllllllllllmmmmmmmmmmmnnnnnnnnnnnooooooooooopppppppppppqqqqqqqqqqqrrrrrrrrrrrssssssssssstttttttttttuuuuuuuuuuuvvvvvvvvvvvwwwwwwwwwwwxxxxxxxxxxxyyyyyyyyyyyzzzzzzzzzzzaaaaaaaaaaabbbbbbbbbbbcccccccccccdddddddddddeeeeeeeeeeefffffffffffggggggggggghhhhhhhhhhhiiiiiiiiiiijjjjjjjjjjjkkkkkkkkkkklllllllllllmmmmmmmmmmmnnnnnnnnnnnooooooooooopppppppppppqqqqqqqqqqqrrrrrrrrrrrssssssssssstttttttttttuuuuuuuuuuuvvvvvvvvvvvwwwwwwwwwwwxxxxxxxxxxxyyyyyyyyyyyzzzzzzzzzzzaaaaaaaaaaabbbbbbbbbbbcccccccccccdddddddddddeeeeeeeeeeefffffffffffggggggggggghhhhhhhhhhhiiiiiiiiiiijjjjjjjjjjjkkkkkkkkkkklllllllllllmmmmmmmmmmmnnnnnnnnnnnooooooooooopppppppppppqqqqqqqqqqqrrrrrrrrrrrsssssssssssttttttttttt
 uuuuuuuuuuuvvvvvvvvvvvwwwwwwwwwwwxxxxxxxxxxxyyyyyyyyyyyzzzzzzzzzzzaaaaaaaaaaabbbbbbbbbbbcccccccccccdddddddddddeeeeeeeeeeefffffffffffggggggggggghhhhhhhhhhhiiiiiiiiiiijjjjjjjjjjjkkkkkkkkkkklll
 llllllllmmmmmmmmmmmnnnnnnnnnnnooooooooooopppppppppppqqqqqqqqqqqrrrrrrrrrrrssssssssssstttttttttttuuuuuuuuuuuvvvvvvvvvvvwwwwwwwwwwwxxxxxxxxxxxyyyyyyyyyyyzzzzzzzzzzzaaaaaaaaaaabbbbbbbbbbbcccccccccccdddddddddddeeeeeeeeeeefffffffffffggggggggggghhhhhhhhhhhiiiiiiiiiiijjjjjjjjjjjkkkkkkkkkkklllllllllllmmmmmmmmmmmnnnnnnnnnnnooooooooooopppppppppppqqqqqqqqqqqrrrrrrrrrrrssssssssssstttttttttttuuuuuuuuuuuvvvvvvvvvvvwwwwwwwwwwwxxxxxxxxxxxyyyyyyyyyyyzzzzzzzzzzzaaaaaaaaaaabbbbbbbbbbbcccccccccccdddddddddddeeeeeeeeeeefffffffffffggggggggggghhhhhhhhhhhiiiiiiiiiiijjjjjjjjjjjkkkkkkkkkkklllllllllllmmmmmmmmmmmnnnnnnnnnnnooooooooooopppppppppppqqqqqqqqqqqrrrrrrrrrrrssssssssssstttttttttttuuuuuuuuuuuvvvvvvvvvvvwwwwwwwwwwwxxxxxxxxxxxyyyyyyyyyyyzzzzzzzzzzzaaaaaaaaaaabbbbbbbbbbbcccccccccccdddddddddddeeeeeeeeeeeffffffffff
 fggggggggggghhhhhhhhhhhiiiiiiiiiiijjjjjjjjjjjkkkkkkkkkkklllllllllllmmmmmmmmmmmnnnnnnnnnnnooooooooooopppppppppppqqqqqqqqqqqrrrrrrrrrrrssssssssssstttttttttttuuuuuuuuuuuvvvvvvvvvvvwwwwwwwwwwwxx
 xxxxxxxxxyyyyyyyyyyyzzzzzzzzzzzaaaaaaaaaaabbbbbbbbbbbcccccccccccdddddddddddeeeeeeeeeeefffffffffffggggggggggghhhhhhhhhhhiiiiiiiiiiijjjjjjjjjjjkkkkkkkkkkklllllllllllmmmmmmmmmmmnnnnnnnnnnnooooooooooopppppppppppqqqqqqqqqqqrrrrrrrrrrrssssssssssstttttttttttuuuuuuuuuuuvvvvvvvvvvvwwwwwwwwwwwxxxxxxxxxxxyyyyyyyyyyyzzzzzzzzzzzaaaaaaaaaaabbbbbbbbbbbcccccccccccdddddddddddeeeeeeeeeeefffffffffffggggggggggghhhhhhhhhhhiiiiiiiiiiijjjjjjjjjjjkkkkkkkkkkklllllllllllmmmmmmmmmmmnnnnnnnnnnnooooooooooopppppppppppqqqqqqqqqqqrrrrrrrrrrrssssssssssstttttttttttuuuuuuuuuuuvvvvvvvvvvvwwwwwwwwwwwxxxxxxxxxxxyyyyyyyyyyyzzzzzzzzzzzaaaaaaaaaaabbbbbbbbbbbcccccccccccdddddddddddeeeeeeeeeeefffffffffffggggggggggghhhhhhhhhhhiiiiiiiiiiijjjjjjjjjjjkkkkkkkkkkklllllllllllmmmmmmmmmmmnnnnnnnnnnnooooooooooopppppppppppqqqqqqqqqqqrrrrrrrrr
 rrssssssssssstttttttttttuuuuuuuuuuuvvvvvvvvvvvwwwwwwwwwwwxxxxxxxxxxxyyyyyyyyyyyzzzzzzzzzzzaaaaaaaaaaabbbbbbbbbbbcccccccccccdddddddddddeeeeeeeeeeefffffffffffggggggggggghhhhhhhhhhhiiiiiiiiiiij
 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
 dddeeeeeeeeeeefffffffffffggggggggggghhhhhhhhhhhiiiiiiiiiiijjjjjjjjjjjkkkkkkkkkkklllllllllllmmmmmmmmmmmnnnnnnnnnnnooooooooooopppppppppppqqqqqqqqqqqrrrrrrrrrrrssssssssssstttttttttttuuuuuuuuuuu
 vvvvvvvvvvvwwwwwwwwwwwxxxxxxxxxxxyyyyyyyyyyyzzzzzzzzzzzaaaaaaaaaaabbbbbbbbbbbcccccccccccdddddddddddeeeeeeeeeeefffffffffffggggggggggghhhhhhhhhhhiiiiiiiiiiijjjjjjjjjjjkkkkkkkkkkklllllllllllmmmmmmmmmmmnnnnnnnnnnnooooooooooopppppppppppqqqqqqqqqqqrrrrrrrrrrrssssssssssstttttttttttuuuuuuuuuuuvvvvvvvvvvvwwwwwwwwwwwxxxxxxxxxxxyyyyyyyyyyyzzzzzzzzzzzaaaaaaaaaaabbbbbbbbbbbcccccccccccdddddddddddeeeeeeeeeeefffffffffffggggggggggghhhhhhhhhhhiiiiiiiiiiijjjjjjjjjjjkkkkkkkkkkklllllllllllmmmmmmmmmmmnnnnnnnnnnnooooooooooopppppppppppqqqqqqqqqqqrrrrrrrrrrrssssssssssstttttttttttuuuuuuuuuuuvvvvvvvvvvvwwwwwwwwwwwxxxxxxxxxxxyyyyyyyyyyyzzzzzzzzzzzaaaaaaaaaaabbbbbbbbbbbcccccccccccdddddddddddeeeeeeeeeeefffffffffffggggggggggghhhhhhhhhhhiiiiiiiiiiijjjjjjjjjjjkkkkkkkkkkklllllllllllmmmmmmmmmmmnnnnnnnnnnnoooooooooooppppppp
 ppppqqqqqqqqqqqrrrrrrrrrrrssssssssssstttttttttttuuuuuuuuuuuvvvvvvvvvvvwwwwwwwwwwwxxxxxxxxxxxyyyyyyyyyyyzzzzzzzzzzzaaaaaaaaaaabbbbbbbbbbbcccccccccccdddddddddddeeeeeeeeeeefffffffffffgggggggggg
 ghhhhhhhhhhhiiiiiiiiiiijjjjjjjjjjjkkkkkkkkkkklllllllllllmmmmmmmmmmmnnnnnnnnnnnooooooooooopppppppppppqqqqqqqqqqqrrrrrrrrrrrssssssssssstttttttttttuuuuuuuuuuuvvvvvvvvvvvwwwwwwwwwwwxxxxxxxxxxxyyyyyyyyyyyzzzzzzzzzzzaaaaaaaaaaabbbbbbbbbbbcccccccccccdddddddddddeeeeeeeeeeefffffffffffggggggggggghhhhhhhhhhhiiiiiiiiiiijjjjjjjjjjjkkkkkkkkkkklllllllllllmmmmmmmmmmmnnnnnnnnnnnooooooooooopppppppppppqqqqqqqqqqqrrrrrrrrrrrssssssssssstttttttttttuuuuuuuuuuuvvvvvvvvvvvwwwwwwwwwwwxxxxxxxxxxxyyyyyyyyyyyzzzzzzzzzzzaaaaaaaaaaabbbbbbbbbbbcccccccccccdddddddddddeeeeeeeeeeefffffffffffggggggggggghhhhhhhhhhhiiiiiiiiiiijjjjjjjjjjjkkkkkkkkkkklllllllllllmmmmmmmmmmmnnnnnnnnnnnooooooooooopppppppppppqqqqqqqqqqqrrrrrrrrrrrssssssssssstttttttttttuuuuuuuuuuuvvvvvvvvvvvwwwwwwwwwwwxxxxxxxxxxxyyyyyyyyyyyzzzzzzzzzzzaaaaaaaaaaabbbbbb
 bbbbbcccccccccccdddddddddddeeeeeeeeeeefffffffffffggggggggggghhhhhhhhhhhiiiiiiiiiiijjjjjjjjjjjkkkkkkkkkkklllllllllllmmmmmmmmmmmnnnnnnnnnnnooooooooooopppppppppppqqqqqqqqqqqrrrrrrrrrrrsssssssss
 sstttttttttttuuuuuuuuuuuvvvvvvvvvvvwwwwwwwwwwwxxxxxxxxxxxyyyyyyyyyyyzzzzzzzzzzzaaaaaaaaaaabbbbbbbbbbbcccccccccccdddddddddddeeeeeeeeeeefffffffffffggggggggggghhhhhhhhhhhiiiiiiiiiiijjjjjjjjjjjkkkkkkkkkkklllllllllllmmmmmmmmmmmnnnnnnnnnnnooooooooooopppppppppppqqqqqqqqqqqrrrrrrrrrrrssssssssssstttttttttttuuuuuuuuuuuvvvvvvvvvvvwwwwwwwwwwwxxxxxxxxxxxyyyyyyyyyyyzzzzzzzzzzz'

/usr/bin/printf "[%lu]
PROCESS_SERVICE_CHECK_RESULT;$host;$service;0;$string\n" $now > $commandfile

Martin



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