2 // huffware script: zap updater from elevators, by fred huffhines
4 // this script is an evil little assassin that is supposed to remove the updater
5 // script from the objects it's added to. it should not remove that script from
6 // any huffotronic devices though.
7 // this is an attempt to quell some SL stability problems due to some seeming
8 // combination of numbers of objects and numbers of scripts.
9 // we hope to be able to add the updater back in automatically later because the
10 // script pin should still be set. let's see if osgrid has that behavior the same
11 // as second life did.
13 // this script is licensed by the GPL v3 which is documented at: http://www.gnu.org/licenses/gpl.html
14 // do not use it in objects without fully realizing you are implicitly accepting that license.
21 // huffware script: auto-retire, by fred huffhines, version 2.8.
22 // distributed under BSD-like license.
23 // !! keep in mind that this code must be *copied* into another
24 // !! script that you wish to add auto-retirement capability to.
25 // when a script has auto_retire in it, it can be dropped into an
26 // object and the most recent version of the script will destroy
27 // all older versions.
29 // the version numbers are embedded into the script names themselves.
30 // the notation for versions uses a letter 'v', followed by two numbers
31 // in the form "major.minor".
32 // major and minor versions are implicitly considered as a floating point
33 // number that increases with each newer version of the script. thus,
34 // "hazmap v0.1" might be the first script in the "hazmap" script continuum,
35 // and "hazmap v3.2" is a more recent version.
37 // example usage of the auto-retirement script:
40 // auto_retire(); // make sure newest addition is only version of script.
43 // this script is partly based on the self-upgrading scripts from markov brodsky
44 // and jippen faddoul.
47 string self = llGetScriptName(); // the name of this script.
48 list split = compute_basename_and_version(self);
49 if (llGetListLength(split) != 2) return; // nothing to do for this script.
50 string basename = llList2String(split, 0); // script name with no version attached.
51 string version_string = llList2String(split, 1); // the version found.
53 // find any scripts that match the basename. they are variants of this script.
54 for (posn = llGetInventoryNumber(INVENTORY_SCRIPT) - 1; posn >= 0; posn--) {
55 string curr_script = llGetInventoryName(INVENTORY_SCRIPT, posn);
56 if ( (curr_script != self) && (llSubStringIndex(curr_script, basename) == 0) ) {
57 // found a basic match at least.
58 list inv_split = compute_basename_and_version(curr_script);
59 if (llGetListLength(inv_split) == 2) {
60 // see if this script is more ancient.
61 string inv_version_string = llList2String(inv_split, 1); // the version found.
62 // must make sure that the retiring script is completely the identical basename;
63 // just matching in the front doesn't make it a relative.
64 if ( (llList2String(inv_split, 0) == basename)
65 && ((float)inv_version_string < (float)version_string) ) {
66 // remove script with same name from inventory that has inferior version.
67 llRemoveInventory(curr_script);
74 // separates the base script name and version number. used by auto_retire.
75 list compute_basename_and_version(string to_chop_up)
77 // minimum script name is 2 characters plus a version.
79 // find the last useful space and 'v' combo.
80 for (space_v_posn = llStringLength(to_chop_up) - 3;
81 (space_v_posn >= 2) && (llGetSubString(to_chop_up, space_v_posn, space_v_posn + 1) != " v");
83 // look for space and v but do nothing else.
85 if (space_v_posn < 2) return []; // no space found.
86 // now we zoom through the stuff after our beloved v character and find any evil
87 // space characters, which are most likely from SL having found a duplicate item
88 // name and not so helpfully renamed it for us.
90 for (indy = llStringLength(to_chop_up) - 1; indy > space_v_posn; indy--) {
91 if (llGetSubString(to_chop_up, indy, indy) == " ") {
92 // found one; zap it. since we're going backwards we don't need to
93 // adjust the loop at all.
94 to_chop_up = llDeleteSubString(to_chop_up, indy, indy);
97 string full_suffix = llGetSubString(to_chop_up, space_v_posn, -1);
98 // ditch the space character for our numerical check.
99 string chop_suffix = llGetSubString(full_suffix, 1, llStringLength(full_suffix) - 1);
100 // strip out a 'v' if there is one.
101 if (llGetSubString(chop_suffix, 0, 0) == "v")
102 chop_suffix = llGetSubString(chop_suffix, 1, llStringLength(chop_suffix) - 1);
103 // if valid floating point number and greater than zero, that works for our version.
104 string basename = to_chop_up; // script name with no version attached.
105 if ((float)chop_suffix > 0.0) {
106 // this is a big success right here.
107 basename = llGetSubString(to_chop_up, 0, -llStringLength(full_suffix) - 1);
108 return [ basename, chop_suffix ];
110 // seems like we found nothing useful.
116 // returns the index of the first occurrence of "pattern" inside
117 // the "full_string". if it is not found, then a negative number is returned.
118 integer find_substring(string full_string, string pattern)
119 { return llSubStringIndex(llToLower(full_string), llToLower(pattern)); }
121 // returns TRUE if the "prefix" string is the first part of "compare_with".
122 integer is_prefix(string compare_with, string prefix)
123 { return find_substring(compare_with, prefix) == 0; }
125 // returns true if this object is a huffotronic updater of some sort.
126 integer inside_of_updater()
128 return find_substring(llGetObjectName(), "huffotronic") >= 0;
131 // stops all the scripts besides this one.
132 knock_around_other_scripts(integer running_state)
135 integer insider = inside_of_updater();
136 string self_script = llGetScriptName();
137 // we set all other scripts to the running state requested.
138 for (indy = 0; indy < llGetInventoryNumber(INVENTORY_SCRIPT); indy++) {
139 string curr_script = llGetInventoryName(INVENTORY_SCRIPT, indy);
140 if ( (curr_script != self_script)
141 && (!insider || matches_server_script(curr_script)) ) {
142 // this one seems ripe for being set to the state requested.
143 llSetScriptState(curr_script, running_state);
148 string SERVER_SCRIPT = "huffotronic update server";
149 // the prefix of our server script that hands out updates.
151 // returns true if a script is a version of our update server.
152 integer matches_server_script(string to_check)
154 return is_prefix(to_check, SERVER_SCRIPT);
165 if (inside_of_updater()) return; // do nothing else.
167 llWhisper(0, "hello, i'm jeeves. pleased to meet you.");
170 string gotta_zap = "huff-update client v";
172 for (i = llGetInventoryNumber(INVENTORY_SCRIPT) - 1; i >= 0; i--) {
173 string cur = llGetInventoryName(INVENTORY_SCRIPT, i);
174 if (is_prefix(cur, gotta_zap)) {
175 llWhisper(0, "i, jeeves, will now clean out this script: " + cur);
176 llRemoveInventory(cur);
180 knock_around_other_scripts(TRUE);
182 llWhisper(0, "i'm sorry to say sir that i now must bid you adieu, as i am removing myself from the world.");
184 llRemoveInventory(llGetScriptName());