"--passphrase-fd n" not working

[pd]

At 11:43 PM 10/1/2001 +0200, you wrote:
>On Mon, 01 Oct 2001 16:21:37 -0400, pd  said:
>
> > I can't get it to work.  When I put in a filename it says it is
> > looking for file descriptor 0.  Is the file descriptor here something
> > different than the filename?  I tried inode number and that doesn't
>
>Yes, it is different.  I suggest that you read some basic text on Unix
>like Steven's APUE.  Or try it out:
>
>The standard output is usually assigned to FD 1,  standard error to FD
>2. You might have notices things like
>
>   foo 2>/dev/null
>
>which sends all error output (standard error = FD 2) to the /dev/null
>file/device.  Or the more common one:
>
>   foo >myfile
>
>which is the same as
>
>   foo 1>myfile

Yes, I am familiar with these numbers.  I didn't know they were called 
"file descriptors".  I just looked at an excellent shell scripting book 
that verified what you said.  (Unix Shell Programming.  Lowell Jay Arthur & 
Ted Burns).


>So, why do we want to pass FD on the commandline?  Not all FD are
>assigned to a file, oftne they are ahndles for pipes which are used
>for interprocess communication like:
>
>   foo | bar
>
>where the shell build a pipe to direct the fd 1 of foo to the fd 0 of bar.
>
>See the source of gpgme for an example on how to use this gpg
>feature. strace may help you to get idea what's going on tehre.

I downloaded it but don't see anything on --passphrase-fd .  All I could 
find on strace was in ltmain.sh.  I couldn't find any examples there.

However, with your help and others I have found that both of the following 
work for me:

gpg --decrypt -r george --passphrase-fd 0 <pass.txt encrypted.txt

gpg --decrypt -r george --passphrase-fd 3  3<pass.txt encrypted.txt

Is there any way to do this with pipes instead of an actual file?  I have a 
number of encrypted texts encrypted with the same key.  I'd like to have a 
perl program prompt for the passphrase once and decrypt the texts without 
storing it in a file on the hard drive.

If I replace "pass.txt" with the password or with `echo password_text` it 
tells me it can't find the file by that name.  Another basic Unix script 
problem I think - making a string look like file contents.  There has to be 
a way to do it, I just haven't been able to come up with it yet.  Any help 
would be appreciated.

Thanks,

Paul

>Hth,
>
>   Werner
>
>
>--
>Werner Koch        Omnis enim res, quae dando non deficit, dum habetur
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>
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