From: Harry Ohlsen <harryo@...>
Date: 2001-11-30T00:54:39+09:00
Subject: [ruby-talk:26916] Re: Fixed ... partly ... maybe a bug?

In article <200111291526.fATFQ5323283@moulon.inra.fr>, "ts"
<decoux@moulon.inra.fr> wrote:

>  ruby must give an error message in this case
> 
> pigeon% ruby -e 'Etc.getpwnam("ts")'
> -e:1: uninitialized constant Etc (NameError) pigeon%

Yes. I get that error message. Let me try my original code again ...
Well, I can't explain why, but it just hangs.  I'll have a play and see
if I can work out why I don't just get the same error message in this
case.  It's bound to be something I'm just not seeing!

>  Try this program and see if it hung
> 
> pigeon% cat a.c
> #include <stdio.h>
> #include <pwd.h>
> #include <sys/types.h>
> 
> main()
> {
>     struct passwd *pwd = getpwnam("harryo/xyz"); if (pwd != NULL)
>         printf("%s\n", pwd->pw_name);
> }

It doesn't hang;  getpwnam() just returns NULL.

> pigeon%
> 
>  then try it with a valid uid

.... and it works fine with a valid UID.

> H> The passwd field in the object it returns contains "x", which is
> what's H> in /etc/passwd to indicate that the password can be found in
> /etc/shadow.
> 
> H> Maybe the code needs to be changed to understand shadow password
> files.
> 
>  why ? you want to try to crack the passwords ? :-)))))

No ... trust me :-).  I'm writing a web based program and I want to use
the normal user names and passwords for validation purposes.  I can
encrypt the password, but I need to have something to compare it against.

Maybe there's another way to it that I'm unaware of.  Any suggestions?