From: zor <silverdragn@...>
Date: 2008-04-14T03:16:14+09:00
Subject: Re: getpass

Sorry if I'm doing this wrong, but how do I get off the mailing list?  
I can't figure it out.
On Apr 13, 2008, at 1:10 AM, Ken Bloom wrote:

> On Thu, 10 Apr 2008 23:08:40 -0500, Yang Zhang wrote:
>
>> Thanks for prompting me to provide some context.  getpass() is a
>> standard POSIX function, described here:
>>
>> http://www.opengroup.org/pubs/online/7908799/xsh/getpass.html
>
> getpass() is not a POSIX anything.
>
> From the manpage:
>
> DESCRIPTION
>        This function is obsolete.  Do not use it.
> ...
> CONFORMING TO
>        Present in SUSv2, but marked LEGACY.  Removed in POSIX.1-2001.
>
> In theory, using Ruby/DL should work, like
>
> require 'dl/import'
> module LibC
>   extend DL::Importable
>   dlload 'libc.so.6'
>   extern 'char *getpass( const char * prompt )'
> end
>
> In theory, theory and practice are the same.
>
> /usr/lib/ruby/1.8/dl/import.rb:126:in `symbol': can't find the symbol
> `getpass' (RuntimeError)
> 	from /usr/lib/ruby/1.8/dl/import.rb:145:in `import'
> 	from /usr/lib/ruby/1.8/dl/import.rb:61:in `extern'
>
>
> But this works:
>
> require 'dl'
> module LibC
>   extend self
>   LIB=DL.dlopen('libc.so.6')
>   SYMS={ :getpass => LIB['getpass','SS'] }
>   def getpass prompt
>     r,rs = SYMS[:getpass].call prompt
>     return r
>   end
> end
>
> Again, don't use this. Use Highline instead.
>
> --Ken
>
> -- 
> Ken (Chanoch) Bloom. PhD candidate. Linguistic Cognition Laboratory.
> Department of Computer Science. Illinois Institute of Technology.
> http://www.iit.edu/~kbloom1/
>