Re: /bin/false (was Re: security questions)
On Sat, Oct 28, 2000 at 03:20:15PM -0700, kmself@ix.netcom.com wrote:
> > also, i noticed that some accounts which are disabled are given a shell of
> > /bin/false:
> >
> > ftp:x:100:65534::/home/ftp:/bin/false
> >
> > tiger seemed to hate this too. i tried playing around with /bin/false.
> > can't seem to figure out what it is. whatever it is, it's tiny. only 4 kb
> > long.
>
> See man false.
Now I also have heard that a shell script /bin/false is a bad thing, because
it still allows some nasty shell tricks, but I haven't come across any
examples. It is also usually what distros install.
However, writing one in C proved to be simple, and an afternoon's worth of fun.
Oh writing it sure didn't take all afternoon, but the fun did. My current
/bin/false is a compiled ELF file, and I don't really know if it's mine or
Potato's (it's been a long time).
--
Jonathan Markevich <jmarkevich@mad.scientist.com>
http://www.geocities.com/jmarkevich
== It's VIRUSES, not VIRII! See http://language.perl.com/misc/virus.html ==
Man and wife make one fool.
Reply to: