[Nagiosplug-devel] TR: TR: Check_snmp Problem

[Thomas Guyot-Sionnest]

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Bruno Grondin wrote:
> Hi thomas,
> 
> How can I add the option "-Oq" into the
> check_snmp.c source for the snmpget commandline ?

If you use nagios_plugins 1.4.13 or older it's very easy, just find any
argument in plugins/check_snmp.c and add it there. You can even add it
to config.h after the defines for PATH_TO_SNMPGET and PATH_TO_SNMPGETNEXT.

For v1.4.14 and up it's more tricky because we use a command argument
array and there appear to be some parameters that assume a fixed size.
The easiest way is to squeeze some arguments to make room for it... ex:

Remove:
- -       command_line[7] = "-v";
- -       command_line[8] = strdup (proto);

And replace with:
+       command_line[7] = malloc(strlen(proto)+3);
+       strcpy(command_line[7], "-v");
+       strcpy(command_line[7]+2, proto);
+       command_line[8] = strdup ("-Oq");

This replace "-v {proto}" with "-v{proto}", which is still valid (for
example with version 2c: "-v 2c" becomes "-v2c"), leaving the position 8
for your "-Oq" argument.

Note that the debug output (-v) needs to be modified as well, so you
won't see any difference in what check_snmp say it will execute unless
you also modify the line starting with:

    asprintf(&cl_hidden_auth, [...]

Which is about 10 lines below what I have shown above. This is just
cosmetic.


- --
Thomas
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