On Sat, 18 Mar 2017, Warren Toomey wrote: Gadzooks... It uses those funny Sendmail maps, as I dimly recall, but my Sendmail-fu is a bit old (I just use it). There seems to be "http://www.linuxjournal.com/article/2771", if that fits your needs. Most of the rest of the references I've found seem to be crap. -- Dave Horsfall DTM (VK2KFU) "Those who don't understand security will suffer."

In fact, my "mkglue" awk script explains that the dbm(3) hacks came from UUNET: #!/bin/awk -f # MKGLUE: UUCP map post processor # Idea from Mel Pleasant via Eliot Lear # Erik E. Fair &lt;fair(a)apple.com&gt;om>, August, 1988 # # revised from domains.txt on December 31, 1990 # # What we have here is a UUCP map postprocessor. To use: # pathalias uucpmaps > /tmp/paths.raw # mkglue /tmp/paths.raw > /tmp/glue # pathalias uucpmaps /tmp/glue > /tmp/paths.refined # do whatever you do with the maps here # # what this does is find Internet EQUIVALENCES for UUCP sites, e.g. # # ucbvax= ucbvax.berkeley.edu # apple= apple.com # # and then it reverses them, and puts all the domain names it finds into # a completely connected network called "INTERNET", with COST defined # below. That cost was determined experimentally on a Cray X/MP-48 # (pathalias will run on such a beast. It takes only 24 seconds to # process all the maps and the glue file. It's amazing what you can do # with a supercomputer). Your milage may vary. # # The effect of this is to cause nearly all your paths to take their # first hop through the Internet. DO NOT USE THIS POSTPROCESSOR, unless # you're actually on the Internet, or you have multiple UUCP neighbors # who are on the Internet of equivalent call cost to you. # # This script will NOT do anything with domain gateway declarations, e.g. # # foo .bar.com # # because these do not provide a mapping between the Internet name and # the UUCP name of the UUCP host involved. This script makes no # distinction between "real" Internet hosts and "fake" (MX'd) ones (how # can I? The information isn't there). Even with an MX host, someone on # the Internet is accepting mail for them (that's what MX is all about). # # Encourage your Internet friends and neighbors to put all the right # information into the UUCP maps. # # Also, your mailer must be able to transform thusly: # # do.main!foo!bar!bazz -> foo!bar!bazz(a)do.main # # since that's what the database will generate. I do it with sendmail, # and I installed the uunet hacks to 5.59 sendmail to look stuff up in a # DBM database. I expect that the IDA sendmail stuff can be similarly # coerced to do this. # # If nothing else, you might find the report at the end of the glue file # interesting. # BEGIN{ COST = "DEMAND+LOW"; # domain["arpa"] = 1; domain["nato"] = 1; domain["com"] = 1; domain["gov"] = 1; domain["mil"] = 1; domain["org"] = 1; domain["edu"] = 1; domain["net"] = 1; domain["int"] = 1; domain["ar"] = 1; domain["at"] = 1; domain["au"] = 1; domain["be"] = 1; domain["br"] = 1; domain["ca"] = 1; domain["ch"] = 1; domain["cl"] = 1; domain["cn"] = 1; domain["cr"] = 1; domain["cs"] = 1; domain["de"] = 1; domain["dk"] = 1; domain["eg"] = 1; domain["es"] = 1; domain["fi"] = 1; domain["fr"] = 1; domain["gr"] = 1; domain["hk"] = 1; domain["hu"] = 1; domain["ie"] = 1; domain["il"] = 1; domain["in"] = 1; domain["is"] = 1; domain["it"] = 1; domain["jp"] = 1; domain["kr"] = 1; domain["lk"] = 1; domain["mx"] = 1; domain["my"] = 1; domain["ni"] = 1; domain["nl"] = 1; domain["no"] = 1; domain["nz"] = 1; domain["ph"] = 1; domain["pl"] = 1; domain["pr"] = 1; domain["pt"] = 1; domain["se"] = 1; domain["sg"] = 1; domain["su"] = 1; domain["th"] = 1; domain["tr"] = 1; domain["tw"] = 1; domain["uk"] = 1; domain["us"] = 1; domain["uy"] = 1; domain["yu"] = 1; domain["za"] = 1; nbad = 0; imon_inet = 0; } # ignore domain gateways (no clean mapping - we must know the internet name) /^\./ {next} $2 == "%s" { # hopefully only one of these if ( $1 !~ /\./ ) { localuucpname = $1; next; } } # here's the meat of the matter - find real domains and reverse the # equivalences so that pathalias will give us paths with internet # names in them. $1 ~ /\./ { hostname= $1; curbad = 0; # check top of domain name for validity i = split(hostname, parts, "."); top = parts[i]; if (domain[top] != 1) { printf("# bad domain - %s\n", hostname); badtop[top]++; nbad++; curbad = 1; } else domtop[top]++; n = split($2, path, "!"); if (n > 1) { uucpname= path[n - 1]; if (hostname == uucpname) next; # skip two sided dot aliases i = split(uucpname, parts, "."); if (i < 2) { if (! curbad) { print hostname "=" uucpname; internet[hostname]++; } } else if (domain[parts[i]] == 1) { print uucpname "=" hostname; internet[uucpname]++; } } else if ($2 == "%s") { if (imon_inet && localuucpname != "" && !curbad) { print localinetname "=" localuucpname; internet[localinetname]++; } if (!curbad) { localinetname= $1; internet[localinetname]++; imon_inet++ } } } # now create a completely connected network of the domain names, # with a low cost, so that we mostly use the Internet in preference # to any other path END{ if (imon_inet) { print localinetname "=" localuucpname; } print "INTERNET={" for(hostname in internet) { printf("\t%s,\n", hostname); } printf("\t}(%s)\n", COST); # # report on what we found while perusing the map data # printf("# top level domains\n"); for(top in domtop) { printf("#\t%s\t%d\n", top, domtop[top]); } # if (nbad > 0) { printf("\n# unrecognized summary:\n"); for(dom in badtop) { printf("#\t%s\t%d\n", dom, badtop[dom]); } } }