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Annotation of 43BSD/usr.lib/sendmail/cf.hosttable/zerobase.m4, revision 1.1.1.1

1.1       root        1: divert(10)
                      2: #
                      3: #  Sendmail
                      4: #  Copyright (c) 1983  Eric P. Allman
                      5: #  Berkeley, California
                      6: #
                      7: #  Copyright (c) 1983 Regents of the University of California.
                      8: #  All rights reserved.  The Berkeley software License Agreement
                      9: #  specifies the terms and conditions for redistribution.
                     10: #
                     11: #      @(#)zerobase.m4 5.3 (Berkeley) 8/2/85
                     12: #
                     13: divert(0)
                     14: ############################################################
                     15: ############################################################
                     16: #####
                     17: #####          RULESET ZERO PREAMBLE
                     18: #####
                     19: #####  The beginning of ruleset zero is constant through all
                     20: #####  configurations.
                     21: #####
                     22: ############################################################
                     23: ############################################################
                     24: 
                     25: S0
                     26: 
                     27: # first make canonical
                     28: R$*<$*>$*              $1$2$3                          defocus
                     29: R$+                    $:$>3$1                         make canonical
                     30: 
                     31: # handle special cases.....
                     32: R@                     $#local$:$n                     handle <> form
                     33: R$*<@[$+]>$*           $#tcp$@[$2]$:$1@[$2]$3          numeric internet spec
                     34: 
                     35: # arrange for local names to be fully qualified
                     36: R$*<$*$=S>$*           $1<$2$3.LOCAL>$4                user@etherhost
                     37: R$*<$*$=Z>$*           $1<$2$3.LOCAL>$4                user@berkhost
                     38: R$*<$+.ARPA.LOCAL>$*   $1<$2.ARPA>$3                   because ARPA is a host
                     39: 
                     40: # now delete the local info
                     41: R$*<$*$=w.$=T>$*       $1<$2>$5                        thishost.LOCAL
                     42: R$*<$*$=w>$*           $1<$2>$4                        thishost
                     43: R$*<$*.>$*             $1<$2>$3                        drop trailing dot
                     44: R<@>:$*                        $@$>0$1                         retry after route strip
                     45: R$*<@>                 $@$>0$1                         strip null trash & retry
                     46: 
                     47: # forward around hosts with communication problems
                     48: R$*<@$=F.LOCAL>$*      $#ether$@$F$:$1<@$2.LOCAL>$3    reroute message
                     49: 
                     50: ##################################
                     51: #  End of ruleset zero preamble  #
                     52: ##################################

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