[rrd-users] Re: librrd / C API Documentation

[Tobias Oetiker]

Today Andreas Maus wrote:
> PITFALLS AND COMMON PROBLEMS:
>
> A lot of obscure problems arise if you forget about the variables optind and opterr.
> These variables are declared in the getopt headerfile (used for parsing the options)
> as _global_ ! So you have to set these variables back to 0 _before_ you call any
> rrd_* function in your program.
>
> Final code snippet:
>
> So finally your update of a rrd-database from your C program would look like:
>
> [... snipp ...]
>
> /* Code that fills rrd_argv and sets rrd_argc to the correct values */
> optind=0;opterr=0;
> rrd_clear_error();
> rrd_ret=rrd_update(rrd_argc,rrd_argv);
>
> if (rrd_test_error()!=0)
> {
>   /* Handle error condition */
>
> }
>
> [... snipp ...]

Andreas,

note that setting optind and opterr is not necessary anymore with
the latest rrdtool versions ...

cheers
tobi

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