1 files changed, 72 insertions, 0 deletions
diff --git a/awklib/eg/network/mobag.awk b/awklib/eg/network/mobag.awk
new file mode 100644
index 00000000..a8c55008
--- /dev/null
+++ b/awklib/eg/network/mobag.awk
@@ -0,0 +1,72 @@
+BEGIN {
+  if (ARGC != 2) {
+    print "MOBAG - a simple mobile agent"
+    print "CALL:\n    gawk -f mobag.awk mobag.awk"
+    print "IN:\n    the name of this script as a command-line parameter"
+    print "PARAM:\n    -v MyOrigin=myhost.com"
+    print "OUT:\n    the result on stdout"
+    print "JK 29.03.1998 01.04.1998"
+    exit
+  }
+  if (MyOrigin == "") {
+     "uname -n" | getline MyOrigin
+     close("uname -n")
+  }
+}
+#ReadMySelf
+/^function /                     { FUNC = $2 }
+/^END/ || /^#ReadMySelf/         { FUNC = $1 }
+FUNC != ""                       { MOBFUN[FUNC] = MOBFUN[FUNC] RS $0 }
+(FUNC != "") && (/^}/ || /^#EndOfMySelf/) \
+                                 { FUNC = "" }
+#EndOfMySelf
+function migrate(Destination, MobCode, Label) {
+  MOBVAR["Label"] = Label
+  MOBVAR["Destination"] = Destination
+  RS = ORS = "\r\n"
+  HttpService = "/inet/tcp/0/" Destination
+  for (i in MOBFUN)
+     MobCode = (MobCode "\n" MOBFUN[i])
+  MobCode = MobCode  "\n\nBEGIN {"
+  for (i in MOBVAR)
+     MobCode = (MobCode "\n  MOBVAR[\"" i "\"] = \"" MOBVAR[i] "\"")
+  MobCode = MobCode "\n}\n"
+  print "POST /cgi-bin/PostAgent.sh HTTP/1.0"  |& HttpService
+  print "Content-length:", length(MobCode) ORS |& HttpService
+  printf "%s", MobCode                         |& HttpService
+  while ((HttpService |& getline) > 0)
+     print $0
+  close(HttpService)
+}
+END {
+  if (ARGC != 2) exit    # stop when called with wrong parameters
+  if (MyOrigin != "")    # is this the originating host?
+    MyInit()             # if so, initialize the application
+  else                   # we are on a host with migrated data
+    MyJob()              # so we do our job
+}
+function MyInit() {
+  MOBVAR["MyOrigin"] = MyOrigin
+  MOBVAR["Machines"] = "localhost/80 max/80 moritz/80 castor/80"
+  split(MOBVAR["Machines"], Machines)           # which host is the first?
+  migrate(Machines[1], "", "")                  # go to the first host
+  while (("/inet/tcp/8080/0/0" |& getline) > 0) # wait for result
+    print $0                                    # print result
+  close("/inet/tcp/8080/0/0")
+}
+function MyJob() {
+  # forget this host
+  sub(MOBVAR["Destination"], "", MOBVAR["Machines"])
+  MOBVAR["Result"]=MOBVAR["Result"] SUBSEP SUBSEP MOBVAR["Destination"] ":"
+  while (("who" | getline) > 0)               # who is logged in?
+    MOBVAR["Result"] = MOBVAR["Result"] SUBSEP $0
+  close("who")
+  if (index(MOBVAR["Machines"], "/") > 0) {   # any more machines to visit?
+    split(MOBVAR["Machines"], Machines)       # which host is next?
+    migrate(Machines[1], "", "")              # go there
+  } else {                                    # no more machines
+    gsub(SUBSEP, "\n", MOBVAR["Result"])      # send result to origin
+    print MOBVAR["Result"] |& "/inet/tcp/0/" MOBVAR["MyOrigin"] "/8080"
+    close("/inet/tcp/0/" MOBVAR["MyOrigin"] "/8080")
+  }
+}