Re: filter read mails

Ruud H.G. van Tol schreef:
> Ruud H.G. van Tol schreef:
> > $ formail +1 -z -cx From: \
> >                 -cx Subject: \
> >                 -cx Status: \
> >                 -s sed -nf abstract.sed < mailbox-file
> Better:
>
>     formail -a  Status: \
>             -cx From: \
>             -cx Subject: \
>             -cx Status: \
>             -s  sed -nf abstract.sed

The output is not always in the right order: 
some spam mail arrives with a Status: header on top;
the From: can be after the Subject:.

So this 

$  < mailbox-file \
   formail -cz \
           -RFrom:    1: \
           -RSubject: 2: \
           -RStatus:  3: \
           -a3: -X1: -X2: -X3: -s

can produce this:

1: Mail System Internal Data <MAILER-DAEMON(AT)imap3.xs4all.nl>
2: DON'T DELETE THIS MESSAGE -- FOLDER INTERNAL DATA
3: RO
3: R
1: "Microsoft Security Bulletin" <clambpnctmji(AT)support.msn.com>
2: Last Internet Security Upgrade
3: R
2: Error Advice
1: "Postmaster" <cmailrobot(AT)america.com>


but that is no problem:

$ < mailbox-file \
  formail -cz \
          -RFrom:    1: \
          -RSubject: 2: \
          -RStatus:  3: \
          -X1: -X2: -X3: -s sed -nf abstract.sed


# Filename: abstract.sed
# ----------------------
# This sed-script should be called with the -n option.

# Append all lines to the pattern space,
# separated by \n.
#
:a
  $! { N
       ba
     }

# Inject a \n at the start and end of the pattern space
#
  s/^\(.*\)\(\n\)\(.*\)$/\2\1\2\3\2/

# Quit if the R-flag was in the 3: line (Status).
#
  /\n3:[^\n]*R/ q

# Remove any 3: line
#
  s/\n3:[^\n]*//g

# Swap 2: and 1:, if in wrong order
#
  s/\(\n2:[^\n]*\)\(\n1:[^\n]*\)/\2\1/

# Remove the field names
#
  s/\(\n\)[12]: /\1/g

# Remove the \n from the start of the pattern space
#
  s/^\n//

# Insert an arrow after the first \n
#
  s/\n/&-> /1

# Print the pattern space.
#
  p

-- 
Grtz, Ruud

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