// 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()); } }