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1.1 root 1: /***** unido:net.games.hack / ab / 7:23 pm Sep 13, 1985*/
2:
3: Recently hack (1.0.3) crashed with core dumps during some good games.
4: The crashes occured in the onbill-routine. After investigating the core
5: dump I found that the shopkeeper's bill was still to be paid. Normaly
6: if you leave a shop the bill will be cleared and onbill() would not
7: check it. But under certain conditions you can leave a shop without
8: clearing the bill. The conditions are:
9:
10: 1. You have to rob a shop in order to make the shopkeeper
11: follow you.
12:
13: 2. After leaving the shop being followed by the shopkeeper
14: you must return to the shop...
15:
16: 3. ...and then leave the unguarded shop again.
17: - The shopkeeper mustn't be present!
18:
19: If you climb the stairs to the previous level, chances are that your
20: bill now contains much more items than allowed. If so the next call to
21: onbill() will dump the core.
22:
23: Following is a context diff to fix the bug. Actually just the last hunk
24: does the fix [it deletes two lines which have been inserted in 1.0.3],
25: but I think the other fix was intended by the now deleted lines.
26:
27: Andreas
28:
29: --
30: Andreas Bormann [email protected]
31: University of Dortmund N 51 29' 05" E 07 24' 42"
32: West Germany
33:
34: ------ the diff follows:
35:
36: *** hack.shk.c.orig Sun Aug 4 12:07:51 1985
37: --- hack.shk.c Fri Sep 13 14:29:52 1985
38: ***************
39: *** 133,139
40: /* Did we just leave a shop? */
41: if(u.uinshop &&
42: (u.uinshop != roomno + 1 || shlevel != dlevel || !shopkeeper)) {
43: - u.uinshop = 0;
44: if(shopkeeper) {
45: if(ESHK(shopkeeper)->billct) {
46: pline("Somehow you escaped the shop without paying!");
47:
48: --- 133,138 -----
49: /* Did we just leave a shop? */
50: if(u.uinshop &&
51: (u.uinshop != roomno + 1 || shlevel != dlevel || !shopkeeper)) {
52: if(shopkeeper) {
53: if(ESHK(shopkeeper)->billct) {
54: if(inroom(shopkeeper->mx, shopkeeper->my)
55: ***************
56: *** 136,142
57: u.uinshop = 0;
58: if(shopkeeper) {
59: if(ESHK(shopkeeper)->billct) {
60: ! pline("Somehow you escaped the shop without paying!");
61: addupbill();
62: pline("You stole for a total worth of %ld zorkmids.",
63: total);
64:
65: --- 135,143 -----
66: (u.uinshop != roomno + 1 || shlevel != dlevel || !shopkeeper)) {
67: if(shopkeeper) {
68: if(ESHK(shopkeeper)->billct) {
69: ! if(inroom(shopkeeper->mx, shopkeeper->my)
70: ! == u.uinshop - 1) /* ab@unido */
71: ! pline("Somehow you escaped the shop without paying!");
72: addupbill();
73: pline("You stole for a total worth of %ld zorkmids.",
74: total);
75: ***************
76: *** 149,154
77: shopkeeper = 0;
78: shlevel = 0;
79: }
80: }
81:
82: /* Did we just enter a zoo of some kind? */
83:
84: --- 150,156 -----
85: shopkeeper = 0;
86: shlevel = 0;
87: }
88: + u.uinshop = 0;
89: }
90:
91: /* Did we just enter a zoo of some kind? */
92: ***************
93: *** 183,190
94: findshk(roomno);
95: if(!shopkeeper) {
96: rooms[roomno].rtype = 0;
97: - u.uinshop = 0;
98: - } else if(inroom(shopkeeper->mx, shopkeeper->my) != roomno) {
99: u.uinshop = 0;
100: } else if(!u.uinshop){
101: if(!ESHK(shopkeeper)->visitct ||
102:
103: --- 185,190 -----
104: findshk(roomno);
105: if(!shopkeeper) {
106: rooms[roomno].rtype = 0;
107: u.uinshop = 0;
108: } else if(!u.uinshop){
109: if(!ESHK(shopkeeper)->visitct ||
110: /* ---------- */
111:
112:
113:
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