> Hello,
>
> I am trying to develop a patch that helps me to hide certain hostgroups from the
> status cgi. I thought of something like adding a "shouldnotseeme-" prefix to the
> hostgroup alias:
>
> define hostgroup {
> hostgroup_name shown
> alias This Host Group will be displayed
> members host1,host2,host3
> }
>
> define hostgroup {
> hostgroup_name not-shown
> alias shouldnotseeme-This Host Group will not be displayed
> members host3,host4,host5
> }
>
> First of all I must admit I am no C programmer.
> I had a look at the status.c source file. Around line 3090 I found a procedure
> show_hostgroup_overview. Now I'd like to simply check there if hstgrp->alias
> contains the string "shouldnotseeme-"
> Unfortunally I do not know how to do this.
> With PHP I think it would look like this:
>
> if (strstr($hstgrp->alias, "shouldnotseeme-") != FALSE)
> {
> // don't show this one
> ..
> }
>
> But I have no idea how to write this in C
Can someone point me in the right> direction. Do you think this will work at all?
>
Perhaps. Fortunately for you, PHP borrows much of its style from C, so
the above would work in C as well, although it has the side-effect (both
in PHP and C) the "shouldnotseeme-" doesn't have to be a prefix, but can
instead appear anywhere in the string.
To find it only if it is the prefix (and also make the code run a little
bit faster), you should instead use
strncmp(hostgroup->alias, "shouldnotseeme-", 15);
Some may argue that memcmp() would be faster in C. On most
architectures, this is true, but it doesn't guarantee that it will stop
at a NUL char so you could possibly run into the program crashing for you.
--
Andreas Ericsson [email protected]
OP5 AB www.op5.se
Tel: +46 8-230225 Fax: +46 8-230231
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