Re: [Caml-list] Writing to argv[0]

[Jason Noakes <jjnoakes@gmail.com>]

On Fri, October 10, 2008 9:26 am, Dave Benjamin wrote:
> So, I finally got it to work in OCaml. This is GNU/Linux only, most
> likely.
>
> proctitle.idl:
>
> quote(c, "extern char * program_invocation_name;");
>
> [string] char * getproctitle(void)
>      quote(call, "_res = program_invocation_name;");
>
> void setproctitle([string] char * proctitle)
>      quote(call, "strcpy(program_invocation_name, proctitle);");
>
> test.ml:
>
> let () =
>    Proctitle.setproctitle "testing setproctitle";
>    print_endline (Proctitle.getproctitle ());
>    Unix.sleep 10

Just be careful with that. You are copying over memory and you also aren't
doing any bounds checking. A long enough "Proctitle.setproctitle" argument
will corrupt your process.

-JJ

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