--- /dev/null
+
+// huffware script: zap updater from elevators, by fred huffhines
+//
+// this script is an evil little assassin that is supposed to remove the updater
+// script from the objects it's added to. it should not remove that script from
+// any huffotronic devices though.
+// this is an attempt to quell some SL stability problems due to some seeming
+// combination of numbers of objects and numbers of scripts.
+// we hope to be able to add the updater back in automatically later because the
+// script pin should still be set. let's see if osgrid has that behavior the same
+// as second life did.
+//
+// this script is licensed by the GPL v3 which is documented at: http://www.gnu.org/licenses/gpl.html
+// do not use it in objects without fully realizing you are implicitly accepting that license.
+//
+
+
+// from hufflets...
+
+//////////////
+// huffware script: auto-retire, by fred huffhines, version 2.8.
+// distributed under BSD-like license.
+// !! keep in mind that this code must be *copied* into another
+// !! script that you wish to add auto-retirement capability to.
+// when a script has auto_retire in it, it can be dropped into an
+// object and the most recent version of the script will destroy
+// all older versions.
+//
+// the version numbers are embedded into the script names themselves.
+// the notation for versions uses a letter 'v', followed by two numbers
+// in the form "major.minor".
+// major and minor versions are implicitly considered as a floating point
+// number that increases with each newer version of the script. thus,
+// "hazmap v0.1" might be the first script in the "hazmap" script continuum,
+// and "hazmap v3.2" is a more recent version.
+//
+// example usage of the auto-retirement script:
+// default {
+// state_entry() {
+// auto_retire(); // make sure newest addition is only version of script.
+// }
+// }
+// this script is partly based on the self-upgrading scripts from markov brodsky
+// and jippen faddoul.
+//////////////
+auto_retire() {
+ string self = llGetScriptName(); // the name of this script.
+ list split = compute_basename_and_version(self);
+ if (llGetListLength(split) != 2) return; // nothing to do for this script.
+ string basename = llList2String(split, 0); // script name with no version attached.
+ string version_string = llList2String(split, 1); // the version found.
+ integer posn;
+ // find any scripts that match the basename. they are variants of this script.
+ for (posn = llGetInventoryNumber(INVENTORY_SCRIPT) - 1; posn >= 0; posn--) {
+ string curr_script = llGetInventoryName(INVENTORY_SCRIPT, posn);
+ if ( (curr_script != self) && (llSubStringIndex(curr_script, basename) == 0) ) {
+ // found a basic match at least.
+ list inv_split = compute_basename_and_version(curr_script);
+ if (llGetListLength(inv_split) == 2) {
+ // see if this script is more ancient.
+ string inv_version_string = llList2String(inv_split, 1); // the version found.
+ // must make sure that the retiring script is completely the identical basename;
+ // just matching in the front doesn't make it a relative.
+ if ( (llList2String(inv_split, 0) == basename)
+ && ((float)inv_version_string < (float)version_string) ) {
+ // remove script with same name from inventory that has inferior version.
+ llRemoveInventory(curr_script);
+ }
+ }
+ }
+ }
+}
+//
+// separates the base script name and version number. used by auto_retire.
+list compute_basename_and_version(string to_chop_up)
+{
+ // minimum script name is 2 characters plus a version.
+ integer space_v_posn;
+ // find the last useful space and 'v' combo.
+ for (space_v_posn = llStringLength(to_chop_up) - 3;
+ (space_v_posn >= 2) && (llGetSubString(to_chop_up, space_v_posn, space_v_posn + 1) != " v");
+ space_v_posn--) {
+ // look for space and v but do nothing else.
+ }
+ if (space_v_posn < 2) return []; // no space found.
+ // now we zoom through the stuff after our beloved v character and find any evil
+ // space characters, which are most likely from SL having found a duplicate item
+ // name and not so helpfully renamed it for us.
+ integer indy;
+ for (indy = llStringLength(to_chop_up) - 1; indy > space_v_posn; indy--) {
+ if (llGetSubString(to_chop_up, indy, indy) == " ") {
+ // found one; zap it. since we're going backwards we don't need to
+ // adjust the loop at all.
+ to_chop_up = llDeleteSubString(to_chop_up, indy, indy);
+ }
+ }
+ string full_suffix = llGetSubString(to_chop_up, space_v_posn, -1);
+ // ditch the space character for our numerical check.
+ string chop_suffix = llGetSubString(full_suffix, 1, llStringLength(full_suffix) - 1);
+ // strip out a 'v' if there is one.
+ if (llGetSubString(chop_suffix, 0, 0) == "v")
+ chop_suffix = llGetSubString(chop_suffix, 1, llStringLength(chop_suffix) - 1);
+ // if valid floating point number and greater than zero, that works for our version.
+ string basename = to_chop_up; // script name with no version attached.
+ if ((float)chop_suffix > 0.0) {
+ // this is a big success right here.
+ basename = llGetSubString(to_chop_up, 0, -llStringLength(full_suffix) - 1);
+ return [ basename, chop_suffix ];
+ }
+ // seems like we found nothing useful.
+ return [];
+}
+//
+//////////////
+
+// returns the index of the first occurrence of "pattern" inside
+// the "full_string". if it is not found, then a negative number is returned.
+integer find_substring(string full_string, string pattern)
+{ return llSubStringIndex(llToLower(full_string), llToLower(pattern)); }
+
+// returns TRUE if the "prefix" string is the first part of "compare_with".
+integer is_prefix(string compare_with, string prefix)
+{ return find_substring(compare_with, prefix) == 0; }
+
+// returns true if this object is a huffotronic updater of some sort.
+integer inside_of_updater()
+{
+ return find_substring(llGetObjectName(), "huffotronic") >= 0;
+}
+
+// stops all the scripts besides this one.
+knock_around_other_scripts(integer running_state)
+{
+ integer indy;
+ integer insider = inside_of_updater();
+ string self_script = llGetScriptName();
+ // we set all other scripts to the running state requested.
+ for (indy = 0; indy < llGetInventoryNumber(INVENTORY_SCRIPT); indy++) {
+ string curr_script = llGetInventoryName(INVENTORY_SCRIPT, indy);
+ if ( (curr_script != self_script)
+ && (!insider || matches_server_script(curr_script)) ) {
+ // this one seems ripe for being set to the state requested.
+ llSetScriptState(curr_script, running_state);
+ }
+ }
+}
+
+string SERVER_SCRIPT = "huffotronic update server";
+ // the prefix of our server script that hands out updates.
+
+// returns true if a script is a version of our update server.
+integer matches_server_script(string to_check)
+{
+ return is_prefix(to_check, SERVER_SCRIPT);
+}
+
+// end hufflets.
+//////////////
+
+default
+{
+ state_entry()
+ {
+ auto_retire();
+ if (inside_of_updater()) return; // do nothing else.
+
+ llWhisper(0, "hello, i'm jeeves. pleased to meet you.");
+ llSleep(32);
+
+ string gotta_zap = "huff-update client v";
+ integer i;
+ for (i = llGetInventoryNumber(INVENTORY_SCRIPT) - 1; i >= 0; i--) {
+ string cur = llGetInventoryName(INVENTORY_SCRIPT, i);
+ if (is_prefix(cur, gotta_zap)) {
+ llWhisper(0, "i, jeeves, will now clean out this script: " + cur);
+ llRemoveInventory(cur);
+ }
+ }
+ llSleep(14);
+ knock_around_other_scripts(TRUE);
+ llSleep(4);
+ llWhisper(0, "i'm sorry to say sir that i now must bid you adieu, as i am removing myself from the world.");
+ llSleep(1);
+ llRemoveInventory(llGetScriptName());
+ }
+}
+