You wrote:
> >Make some kind of generic function that will check the incoming
> >string. Allow NO Unix shell-characters ; : & > < and you will be
> >fine.
>
> This is not a good approach to programming a secure environment.
> You should decide what consists of a vaild set of characters and
> allow only characters from that set, rather than deciding which
> characters aren't allowed. Its much safer building from the empty
> set, than removing from a full set. Just check that each character
> is in the set { [a-zA-Z][0-9].@_ } (and maybe a couple other
> characters). Fork/exec will also improve safety by bypassing
> shells.
In my opinion fork is no option in MUDs it may severely lag the
host by duplicating the whole memory image of the MUD (probably
including swapped out pages) If its not a copy-on-write OS.
There is another option however: use sendmail
Make an ascii email file with some mailheaders (To: ...)
Then call in your program
system("sendmail < Myfile.txt &");
That's all and save.
Cat.
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