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annotate rogue5/score.h @ 176:db1c9a21a7c3

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srogue: prevent overflowing the score file name. If SCOREFILE is not defined, roguehome() is called to find a directory for the score file. It copies up to PATH_MAX-20 bytes from an environment variable to a static buffer. Later these are strcpy()'d to scorefile, which is of size LINLEN. Unfortunately LINLEN is 80 and PATH_MAX is at least 256. On Linux, it happens to be 4096. I haven't yet managed to crash or exploit it, but there are surely no beneficial consequences, so roguehome() has been modified to check the length, and the string it returns is also checked in main().
author John "Elwin" Edwards
date Sun, 02 Aug 2015 12:14:47 -0400
parents f502bf60e6e4
children
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f502bf60e6e4 Import Rogue 5.4 from the Roguelike Restoration Project (r1490)
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1 /*
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2 * Score file structure
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3 *
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4 * @(#)score.h 4.6 (Berkeley) 02/05/99
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5 *
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6 * Rogue: Exploring the Dungeons of Doom
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7 * Copyright (C) 1980-1983, 1985, 1999 Michael Toy, Ken Arnold and Glenn Wichman
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8 * All rights reserved.
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9 *
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10 * See the file LICENSE.TXT for full copyright and licensing information.
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11 */
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12
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13 struct sc_ent {
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14 uid_t sc_uid;
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15 int sc_score;
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16 unsigned int sc_flags;
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17 int sc_monster;
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18 char sc_name[MAXSTR];
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19 int sc_level;
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20 unsigned int sc_time;
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21 };
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22
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23 typedef struct sc_ent SCORE;
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24
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25 void rd_score(SCORE *top_ten);
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26 void wr_score(SCORE *top_ten);