Time for an 2014 update…

Task/Introspection/AWK/introspection.awk

@@ -0,0 +1,14 @@
+# syntax: GAWK -f INTROSPECTION.AWK
+BEGIN {
+    if (PROCINFO["version"] < "4.1.0") {
+      print("version is too old")
+      exit(1)
+    }
+    bloop = -1
+    if (PROCINFO["identifiers"]["abs"] == "user" && bloop != "") {
+      printf("bloop = %s\n",bloop)
+      printf("abs(bloop) = %s\n",abs(bloop))
+    }
+    exit(0)
+}
+function abs(x) { if (x >= 0) { return x } else { return -x } }