#! /bin/sh
:
#$Id: arch_retrieve,v 1.52 2000/01/29 06:52:16 guenther Exp $

test=test		# /bin/test
expr=expr		# /bin/expr
echo=echo		# /bin/echo
ls=ls			# /bin/ls
rm=rm			# /bin/rm
sed=sed			# /bin/sed
cat=cat			# /bin/cat
egrep=egrep		# /bin/egrep
nice=nice		# /bin/nice
date=date		# /bin/date
touch=touch		# /bin/touch
chmod=chmod		# /bin/chmod
mimesend=mimesend	# SedHomeDir/.bin/mimesend
sleep=sleep		# /bin/sleep
mimencode=mimencode	# /usr/local/bin/mimencode	# metamail MIME package
formail=formail		# /usr/local/bin/formail

$test -z "$listaddr" &&
 $echo "Don't start this script directly, it is used in rc.request" && exit 64

decode=$cat			# program or script to read the files that
				# are to be retrieved.	If any decoding needs
				# to be done, do it in that program.

search=$egrep			# program or script to egrep the files, it
				# should accept most egrep options

breakoff_search=512		# the maximum number of matches returned
breakoff_ls=512			# the maximum number of files listed with ls
maxfiles=16			# the maximum number of files returned (per
				# command), this can be overridden with
				# the "maxfiles nnn" command.  Setting it
				# to zero will disable checking.

waitsleep=1			# number of seconds to sleep between sending
				# off files (to limit the load increase)
				# Don't set this limit too high, or your list
				# might become unavailable for extended periods
				# of time (if lots of files are being
				# requested).
				# If queueing is enabled, this sleep period
				# will not be used between putting files in
				# the queue.

tmprequest=tmp.request
tmpfrom=tmp.from

$chmod u+w tmp.lock		# so that we can touch it

archivetxt=archive.txt		# the helpfile
archivedir=archive

standalone=$1

from="arch_retrieve:  requested"
$echo "arch_retrieve: processing for `$cat $tmpfrom`  `$date`" >$tmpfrom

case "$X_ENVELOPE_TO" in
  *$list-request*) wrongaddress="" ;;
  *) wrongaddress="WARNING:
	Please try to use '$listreq'
	the next time when issuing archive server requests." ;;
esac

export decode tmprequest archivedir wrongaddress	# for mimesend

#
# Check if mimencode is available
#

if ( exec </dev/null >/dev/null 2>&1; exec $mimencode)
then
:
else
  mimencode=""
fi

$formail -k -xSubject: |
 $sed -e '/^[^a-zA-Z	 ]/,$ d' -e 's/^[	 ]*[Aa]rchive/ARCHIVE/' \
  -e 's/[	 ]archive\/\/*/ /g' |
 (  oldwrongaddress="$wrongaddress"
    wrongaddress="WARNING:
	Please make sure to start the Subject: of requests to the archive-
	server with the word archive."
   if $test ! -z "$oldwrongaddress"
   then
      wrongaddress="$wrongaddress
$oldwrongaddress"
   fi
   sendhelp=""
   ILLEGAL=""
   while read line
   do
      set `cd $archivedir; $echo dummy $line`
      shift
      case "$1" in
	 ARCHIVE|ARCHIVE[Ss]|ARCHIVE[Ss]:|ARCHIVE:) shift
	    $test ! -z "$wrongaddress" && wrongaddress="$oldwrongaddress";;
      esac
      if $test ! -z "$wrongaddress"
      then
	 wrongaddress="
$wrongaddress"
      fi
      #
      # Now call up the local extension file (if any)...
      #
      if test -f retrieve.local
      then
	 . retrieve.local
      elif test -f ../SedBinDir/retrieve.local
      then
	 . ../SedBinDir/retrieve.local
      elif test -f ../.bin/retrieve.local
      then
	 . ../.bin/retrieve.local
      fi
      #
      # The extension file should have used "set" to clear $1 and tell that
      # it has processed the current command
      #
      case "$1" in
	 maxfiles|MAXFILES)
	    maxfiles=$2 ;;
	 send|sendme|get|getme|gimme|retrieve|mail|\
	 SEND|SENDME|GET|GETME|GIMME|RETRIEVE|MAIL)
	    $touch tmp.lock
	    shift
	    if $expr $maxfiles = 0 \| $maxfiles \>= $# >/dev/null
	    then
	       while $test $# != 0
	       do
		  case "$1" in
		     */../*|../*|*/..|..|[-/]*)
			$echo "$from ILLEGAL $1" >>$tmpfrom
			$test -z "$ILLEGAL" && ILLEGAL="$1";;
		     *) if $test -d "$archivedir/$1"
			then
			   $echo "$from DIR_ERROR $1" >>$tmpfrom
			elif $test -r "$archivedir/$1"
			then
			   $echo "$from $1" >>$tmpfrom
			else
			   $echo "$from UNAVAIL $1" >>$tmpfrom
			fi
			if $test -z "$mimencode"
			then
		      ( $formail -rt -I"Subject: archive retrieval: $1" \
			 -i"From: $listreq" -A"X-Loop: $listaddr" \
 -i"Reply-To: Please.write.a.new.mail.instead.of.replying@FIRST.WORD.archive" \
			 -i"Content-ID: <$1%$listreq>" \
			 -I"Precedence: bulk" -X "" <$tmprequest
			$test ! -z "$wrongaddress" && $echo "$wrongaddress"
			cd $archivedir
			if $test -d "./$1"
			then
			   $echo ""
			   $echo "$1 is a directory, use 'ls' instead."
			elif $test -r "./$1"
			then
			   case "`$sed -e 1q <\"./$1\"`" in
			      Content-[Tt]ype:*) $cat "./$1" ;;
			      *) $echo ""
				 $echo "File: $1"
				 $echo "BEGIN------------cut here-------------"
				 $decode "./$1"
				 $echo "END--------------cut here-------------"
				 ;;
			   esac
			else
			   $echo ""
			   $echo "File $1 is currently not available."
			   $echo "N.B. Filenames are case sensitive!"
			fi
		      ) | $SENDMAIL $sendmailOPT $sendmailOPTq -t
			else
			   $nice $mimesend "$1"
			fi
		      ;;
		  esac
		  shift
	       done
	    else
	       ( $formail -rt -I"Subject: archive retrieval: $line" \
		      -i"From: $listreq" -A"X-Loop: $listaddr" \
 -i"Reply-To: Please.write.a.new.mail.instead.of.replying@FIRST.WORD.archive" \
		      -I"Precedence: bulk" <$tmprequest
		 $test ! -z "$wrongaddress" && $echo "$wrongaddress"
		 $echo "Your request expanded to more than $maxfiles files."
		 $echo "If you want to receive all of them, use the"
		 $echo "'archive maxfiles $#' command first to raise the"
		 $echo "limit."
	       ) | $SENDMAIL $sendmailOPT -t
	    fi
	    $test -z "$sendmailOPTq" && $sleep $waitsleep ;;
	 ls|dir|directory|list|show|\
	 LS|DIR|DIRECTORY|LIST|SHOW)
	    shift
	    case "$*" in
	       *[/\ ]..[/\ ]*|..[/\ ]*|*[/\ ]..|..|[-/]*|*\ /*)
		  $echo "$from ILLEGAL $line" >>$tmpfrom
		  $test -z "$ILLEGAL" && ILLEGAL="$line";;
	       *)
		  $touch tmp.lock
		  $echo "$from $line" >>$tmpfrom
		   ( $formail -rt -I"Subject: archive retrieval: ls $1" \
		      -i"From: $listreq" -A"X-Loop: $listaddr" \
 -i"Reply-To: Please.write.a.new.mail.instead.of.replying@FIRST.WORD.archive" \
		      -i"Content-ID: <$*%$listreq>" \
		      -I"Precedence: bulk" <$tmprequest
		     $test ! -z "$wrongaddress" && $echo "$wrongaddress"
		     cd $archivedir
		     $echo "ls -l $*"
		     $echo "BEGIN---------------cut here------------------"
		     $ls -lL "$@" 2>&1 | $sed -e $breakoff_ls'a\
Truncating after '$breakoff_ls' names...' -e ${breakoff_ls}q
		     $echo "END-----------------cut here------------------"
		   ) | $SENDMAIL $sendmailOPT -t
		  $sleep $waitsleep ;;
	    esac ;;
	 search|grep|egrep|fgrep|find|\
	 SEARCH|GREP|EGREP|FGREP|FIND)
	    iflag="-i"; nflag="-n"; flags=""; ready=no
	    while $test ! -z "$ready"
	    do
	       shift
	       case "$1" in
		  -i-) iflag="";;
		  -n-) nflag="";;
		  -[chlnv]) flags="$flags $1" ;;
		  -?) ;;				# skip unknown flags
		  *) ready="" ;;
	       esac
	    done
	    regxp="$1"
	    $test $# != 0 && shift
	    case "$*" in
	       *[/\ ]..[/\ ]*|..[/\ ]*|*[/\ ]..|..|[-/]*|*\ /*)
		  $echo "$from ILLEGAL $line" >>$tmpfrom
		  $test -z "$ILLEGAL" && ILLEGAL="$line";;
	       *) $touch tmp.lock
		  $echo "$from $line" >>$tmpfrom
		( $formail -rt -I"Subject: archive retrieval: $line" \
		   -i"From: $listreq" -A"X-Loop: $listaddr" \
 -i"Reply-To: Please.write.a.new.mail.instead.of.replying@FIRST.WORD.archive" \
		   -I"Precedence: bulk" <$tmprequest
		  $test ! -z "$wrongaddress" && $echo "$wrongaddress"
		  cd $archivedir
		  $echo "$line"
		  $echo "BEGIN---------------cut here------------------"
		  $nice $search $nflag $iflag $flags -e $regxp $* \
		   </dev/null 2>&1 | $sed -e $breakoff_search'a\
Truncating after '$breakoff_search' matches...' -e ${breakoff_search}q
		  $echo "END-----------------cut here------------------"
		) | $SENDMAIL $sendmailOPT -t
		  $sleep $waitsleep ;;
	    esac ;;
	 version|VERSION)
	       $touch tmp.lock
		( $formail -rt -I"Subject: archive retrieval: $line" \
		   -i"From: $listreq" -A"X-Loop: $listaddr" \
 -i"Reply-To: Please.write.a.new.mail.instead.of.replying@FIRST.WORD.archive" \
		   <$tmprequest
		  $test ! -z "$wrongaddress" && $echo "$wrongaddress"
		  flist -v 2>&1 | sed -e "/^User:/,$ d"
		  echo ""
		  procmail -v 2>&1
		) | $SENDMAIL $sendmailOPT -t
	       $sleep $waitsleep ;;
	 quit|QUIT|exit|EXIT)
	       while read line
	       do
	       :
	       done ;;
	 ""|\#*) ;;
	 *) $test -z "$sendhelp" && sendhelp="$1" ;;
      esac
   done
   if $test ! -z "$sendhelp" -o ! -z "$ILLEGAL"
   then
       ( $formail -rt -I"Subject: archive retrieval info" \
	  -i"From: $listreq" -A"X-Loop: $listaddr" -I"Precedence: bulk" \
 -i"Reply-To: Please.write.a.new.mail.instead.of.replying@FIRST.WORD.archive" \
	  <$tmprequest
	 $test ! -z "$wrongaddress" && $echo "$wrongaddress"
	 case "X$sendhelp" in
	    X[Hh][Ee][Ll][Pp]|X[Ii][Nn][Ff][Oo]|X)
	       $echo "$from $sendhelp." >>$tmpfrom ;;
	    *) $echo "$from unknown command $sendhelp." >>$tmpfrom
	       $echo "Unknown command $sendhelp." ;;
	 esac
	 $test ! -z "$ILLEGAL" && $echo "Illegal filename $ILLEGAL requested."
	 $echo ""
	 $cat $archivetxt
	 if $test ! -z "$standalone"
	 then
	    $echo ""
	    $test -f help.txt && $cat help.txt
	    $test -f info.txt && $cat info.txt
	 fi
       ) | $SENDMAIL $sendmailOPT -t
   fi
 )

if $test ! -z "$archive_log"
then
  $echo "arch_retrieve: done  `$date`" >>$tmpfrom
  $cat $tmpfrom >>$archive_log
fi

if $test ! -z "$sendmailQflush"
then
  $sendmailQflush 2>/dev/null &
fi