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Annotation of 42BSD/usr.lib/sendmail/cf/zerobase.m4, revision 1.1.1.1

1.1       root        1: ############################################################
                      2: ############################################################
                      3: #####
                      4: #####          RULESET ZERO PREAMBLE
                      5: #####
                      6: #####  The beginning of ruleset zero is constant through all
                      7: #####  configurations.
                      8: #####
                      9: #####          @(#)zerobase.m4 4.1             7/25/83
                     10: #####
                     11: ############################################################
                     12: ############################################################
                     13: 
                     14: S0
                     15: 
                     16: # first make canonical
                     17: R$*<$*>$*              $1$2$3                          defocus
                     18: R$+                    $:$>3$1                         make canonical
                     19: 
                     20: # handle special cases.....
                     21: R@                     $#local$:MAILER-DAEMON          handle <> form
                     22: R$*<@[$+]>$*           $#tcp$@[$2]$:$1@[$2]$3          numeric internet spec
                     23: 
                     24: # arrange for local names to be fully qualified
                     25: R$*<$*$=S>$*           $1<$2$3.LOCAL>$4                user@etherhost
                     26: R$*<$*$=Z>$*           $1<$2$3.LOCAL>$4                user@berkhost
                     27: R$*<$+.ARPA.LOCAL>$*   $1<$2.ARPA>$3                   because ARPA is a host
                     28: 
                     29: # now delete the local info
                     30: R$*<$*$=w.LOCAL>$*     $1<$2>$4                        thishost.LOCAL
                     31: R$*<$*$=w.ARPA>$*      $1<$2>$4                        thishost.ARPA
                     32: R$*<$*$=w.UUCP>$*      $1<$2>$4                        thishost.UUCP
                     33: R$*<$*$=w>$*           $1<$2>$4                        thishost
                     34: R$*<$*.>$*             $1<$2>$3                        drop trailing dot
                     35: R<@>:$*                        $@$>0$1                         retry after route strip
                     36: R$*<@>                 $@$>0$1                         strip null trash & retry
                     37: 
                     38: # forward around hosts with communication problems
                     39: R$*<@$=F.LOCAL>$*      $#ether$@$F$:$1<@$2.LOCAL>$3    reroute message
                     40: 
                     41: ##################################
                     42: #  End of ruleset zero preamble  #
                     43: ##################################

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