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    Length: 1201 (0x4b1)
    Types: TextFile
    Names: »trim-headers«

└─⟦a0efdde77⟧ Bits:30001252 EUUGD11 Tape, 1987 Spring Conference Helsinki
    └─⟦this⟧ »EUUGD11/euug-87hel/sec1/elm/utils/trim-headers« 

TextFile

: Use /bin/sh

# This shell script is designed to be used either to trim the 'junk' headers
# out of an archived/saved mailbox file or to trim the headers off a file 
# that is being piped to it.  The program considers the following headers
# to be worth saving - everything else is junked.
#
#	From <user> <date>
#	From: name <address>
#	Subject:
#	To: 
#	Cc:
#	Date:
#
# all others are ignored and trashed.
#
# (C) Copyright 1986, Dave Taylor

# first off, let's make the 'awk' script we'll be using...

cat << 'END_OF_AWK_SCRIPT' > /tmp/awk.$$
BEGIN { in_body = 1 }
{	if (in_body) {
	  if ($1 == "From") in_body = 0;
	  print $0
	}
	else if ($1 == "From:" || $1 == "Subject:" || $1 == "To:" || \
	         $1 == "Cc:" || $1 == "Date:")
	  print $0
	else if (length($0) == 0) {
	  in_body = 1;
	  print $0
	}
}
END_OF_AWK_SCRIPT

# next let's see if we're being piped to or if we've been handed
# either a file name or list of file names...

if [ "$1" = "" ]
then
  cat - | awk -f /tmp/awk.$$ | uniq
  rm -f /tmp/awk.$$
else
  for filename in $*
  do
    echo filtering file $filename
    cat $filename | awk -f /tmp/awk.$$ | uniq > OUTFILE
    mv OUTFILE $filename
  done
  echo done
fi
  
exit 0