Mercurial > hg > early-roguelike
view arogue7/network.h @ 176:db1c9a21a7c3
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 | adfa37e67084 |
| children |
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/* * network.h - networking setup * * Advanced Rogue * Copyright (C) 1984, 1985, 1986 Michael Morgan, Ken Dalka and AT&T * All rights reserved. * * Based on "Rogue: Exploring the Dungeons of Doom" * Copyright (C) 1980, 1981 Michael Toy, Ken Arnold and Glenn Wichman * All rights reserved. * * See the file LICENSE.TXT for full copyright and licensing information. */ /* * Note that networking is set up for machines that can communicate * via some system such as uucp. The mechanism listed here uses * uux and assumes that the target machine allows access to the * game via the uux command. NETCOMMAND must be defined if networking * is desired. */ /* #define NETCOMMAND "uux - -n '%s!%s -u' >/dev/null 2>&1" */ /* Networking information -- should not vary among networking machines */ #define SYSLEN 9 #define LOGLEN 8 #undef NUMNET /* 1 */ struct network { char *system; char *rogue; }; extern struct network Network[]; /* This system's name -- should not be defined if uname() is available */ #undef SYSTEM /* "ihesa" */