[OT] Sed issue

[David G. Miller]

"Dan Track" <dan.track at gmail.com> wrote:

> I'm hoping one of you experts out there can help me. I'd like to
> delete a file signiture from the top and bottom of a file. I know I
> need to use sed, but my sed isn't that good. Could someone please help
> me write a sed command. I would appreciate any help.
>
> At the top of the file I have:
>
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> NotDashEscaped: You need GnuPG to verify this message
>
>
> And at the bottom I have
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.4.5 (GNU/Linux)
>
> iD8DBQFFcCjc3ONEHVs4u3gRAj4QAJ0V3ty8JTq4nMBORezYNIY5w3lS0QCfaktf
> zdJZhBHnGdrGYYIzIVvUxHO=
> =3RVS
> -----END PGP SIGNATURE-----
>
>   
Why use sed?  How about:

cat file | head --lines=-3 | awk '{if (/-----BEGIN PGP SIGNATURE-----/) 
exit; print $0;}'

The head --lines=-3 prints the file after skipping the first three 
lines.  The little awk program prints everything until it gets to the 
PGP signature line.

Cheers,
Dave

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