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quakeforge/libs/util/quakefs.c
Bill Currie d8d21b00f4 Fix some issues found found by valgrind. 
Buffer underflow and though strcpy has always been safe there, change to
memmove. Had the added benefit of helping me create more test cases for
better coverage.
2012-01-24 19:54:21 +09:00

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/*
quakefs.c
virtual filesystem functions
Copyright (C) 1996-1997 Id Software, Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
static __attribute__ ((used)) const char rcsid[] =
"$Id$";
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#ifdef HAVE_IO_H
# include <io.h>
#endif
#if defined(_WIN32) && defined(HAVE_MALLOC_H)
#include <malloc.h>
#endif
#include <ctype.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stdlib.h>
#include <sys/stat.h>
#ifdef HAVE_FNMATCH_H
# define model_t sunmodel_t
# include <fnmatch.h>
# undef model_t
#else
# ifdef _WIN32
# include "fnmatch.h"
# endif
#endif
#ifdef HAVE_IO_H
# include <io.h>
#endif
#ifdef _MSC_VER
# define _POSIX_
#endif
#include <limits.h>
#include "QF/cmd.h"
#include "QF/cvar.h"
#include "QF/dstring.h"
#include "QF/hash.h"
#include "QF/mathlib.h"
#include "QF/pak.h"
#include "QF/pakfile.h"
#include "QF/qargs.h"
#include "QF/qendian.h"
#include "QF/qfplist.h"
#include "QF/qtypes.h"
#include "QF/quakefs.h"
#include "QF/sys.h"
#include "QF/va.h"
#include "QF/zone.h"
#include "compat.h"
#ifndef HAVE_FNMATCH_PROTO
int fnmatch (const char *__pattern, const char *__string, int __flags);
#endif
/*
All of Quake's data access is through a hierchical file system, but the
contents of the file system can be transparently merged from several
sources.
The "user directory" is the path to the directory holding the quake.exe
and all game directories. This can be overridden with the "fs_sharepath"
and "fs_userpath" cvars to allow code debugging in a different directory.
The base directory is used only during filesystem initialization.
The "game directory" is the first tree on the search path and directory
that all generated files (savegames, screenshots, demos, config files)
will be saved to. This can be overridden with the "-game" command line
parameter. The game directory can never be changed while quake is
executing. This is a precacution against having a malicious server
instruct clients to write files over areas they shouldn't.
The "cache directory" is used only during development to save network
bandwidth, especially over ISDN / T1 lines. If there is a cache directory
specified, when a file is found by the normal search path, it will be
mirrored into the cache directory, then opened there.
*/
// QUAKE FILESYSTEM
static cvar_t *fs_userpath;
static cvar_t *fs_sharepath;
static cvar_t *fs_dirconf;
VISIBLE const char *qfs_userpath;
VISIBLE int qfs_filesize;
typedef struct searchpath_s {
char *filename;
struct pack_s *pack; // only one of filename / pack will be used
struct searchpath_s *next;
} searchpath_t;
static searchpath_t *qfs_searchpaths;
//QFS
typedef struct qfs_var_s {
char *var;
char *val;
} qfs_var_t;
static void qfs_add_gamedir (const char *dir);
VISIBLE gamedir_t *qfs_gamedir;
static plitem_t *qfs_gd_plist;
static const char *qfs_game = "";
static const char *qfs_default_dirconf =
"{"
" QF = {"
" Path = \"QF\";"
" };"
" Quake = {"
" Inherit = QF;"
" Path = \"id1\";"
" GameCode = \"progs.dat\";"
" HudType = \"id\";"
" };"
" QuakeWorld = {"
" Inherit = (Quake);"
" Path = \"qw\";"
" SkinPath = \"${path}/skins\";"
" GameCode = \"qwprogs.dat\";"
" HudType = \"id\";"
" };"
" \"Hipnotic\" = {"
" Inherit = (Quake);"
" Path = \"hipnotic\";"
" HudType = \"hipnotic\";"
" };"
" \"Rogue\" = {"
" Inherit = (Quake);"
" Path = \"rogue\";"
" HudType = \"rogue\";"
" };"
" \"qw:qw\" = {"
" Inherit = (QuakeWorld);"
" };"
" \"qw:*\" = {"
" Inherit = (QuakeWorld);"
" Path = \"$gamedir\";"
" };"
" \"nq:*\" = {"
" Inherit = (Quake);"
" Path = \"$gamedir\";"
" };"
" \"hipnotic:*\" = {"
" Inherit = (Hipnotic);"
" Path = \"$gamedir\";"
" };"
" \"rogue:*\" = {"
" Inherit = (Rogue);"
" Path = \"$gamedir\";"
" };"
" \"abyss\" = {"
" Inherit = (Quake);"
" Path = \"abyss\";"
" };"
" \"abyss:*\" = {"
" Inherit = (abyss);"
" Path = \"$gamedir\";"
" };"
"}";
#define GAMEDIR_CALLBACK_CHUNK 16
static gamedir_callback_t **gamedir_callbacks;
static int num_gamedir_callbacks;
static int max_gamedir_callbacks;
static const char *
qfs_var_get_key (void *_v, void *unused)
{
return ((qfs_var_t *)_v)->var;
}
static void
qfs_var_free (void *_v, void *unused)
{
qfs_var_t *v = (qfs_var_t *) _v;
free (v->var);
free (v->val);
free (v);
}
static hashtab_t *
qfs_new_vars (void)
{
return Hash_NewTable (61, qfs_var_get_key, qfs_var_free, 0);
}
static void
qfs_set_var (hashtab_t *vars, const char *var, const char *val)
{
qfs_var_t *v = Hash_Find (vars, var);
if (!v) {
v = malloc (sizeof (qfs_var_t));
v->var = strdup (var);
v->val = 0;
Hash_Add (vars, v);
}
if (v->val)
free (v->val);
v->val = strdup (val);
}
static inline int
qfs_isident (byte c)
{
return ((c >= 'a' && c <='z') || (c >= 'A' && c <='Z')
|| (c >= '0' && c <= '9') || c == '_');
}
static char *
qfs_var_subst (const char *string, hashtab_t *vars)
{
dstring_t *new = dstring_newstr ();
const char *s = string;
const char *e = s;
const char *var;
qfs_var_t *sub;
while (1) {
while (*e && *e != '$')
e++;
dstring_appendsubstr (new, s, (e - s));
if (!*e++)
break;
if (*e == '$') {
dstring_appendstr (new, "$");
s = ++e;
} else if (*e == '{') {
s = e;
while (*e && *e != '}')
e++;
if (!*e) {
dstring_appendsubstr (new, s, (e - s));
break;
}
var = va ("%.*s", (int) (e - s) - 1, s + 1);
sub = Hash_Find (vars, var);
if (sub)
dstring_appendstr (new, sub->val);
else
dstring_appendsubstr (new, s - 1, (e - s) + 2);
s = ++e;
} else if (qfs_isident (*e)) {
s = e;
while (qfs_isident (*e))
e++;
var = va ("%.*s", (int) (e - s), s);
sub = Hash_Find (vars, var);
if (sub)
dstring_appendstr (new, sub->val);
else
dstring_appendsubstr (new, s - 1, (e - s) + 1);
s = e;
} else {
dstring_appendstr (new, "$");
s = e;
}
}
return dstring_freeze (new);
}
static void
qfs_get_gd_params (plitem_t *gdpl, gamedir_t *gamedir, dstring_t *path,
hashtab_t *vars)
{
plitem_t *p;
const char *ps;
if ((p = PL_ObjectForKey (gdpl, "Path")) && *(ps = PL_String (p))) {
char *str = qfs_var_subst (ps, vars);
qfs_set_var (vars, "path", str);
if (path->str[0])
dstring_appendstr (path, ":");
dstring_appendstr (path, str);
free (str);
}
if (!gamedir->gamecode && (p = PL_ObjectForKey (gdpl, "GameCode")))
gamedir->gamecode = qfs_var_subst (PL_String (p), vars);
if (!gamedir->hudtype && (p = PL_ObjectForKey (gdpl, "HudType")))
gamedir->hudtype = qfs_var_subst (PL_String (p), vars);
if (!gamedir->dir.skins && (p = PL_ObjectForKey (gdpl, "SkinPath")))
gamedir->dir.skins = qfs_var_subst (PL_String (p), vars);
if (!gamedir->dir.models && (p = PL_ObjectForKey (gdpl, "ModelPath")))
gamedir->dir.models = qfs_var_subst (PL_String (p), vars);
if (!gamedir->dir.sound && (p = PL_ObjectForKey (gdpl, "SoundPath")))
gamedir->dir.sound = qfs_var_subst (PL_String (p), vars);
if (!gamedir->dir.maps && (p = PL_ObjectForKey (gdpl, "MapPath")))
gamedir->dir.maps = qfs_var_subst (PL_String (p), vars);
if (!gamedir->dir.shots && (p = PL_ObjectForKey (gdpl, "ShotsPath")))
gamedir->dir.shots = qfs_var_subst (PL_String (p), vars);
}
static void
qfs_inherit (plitem_t *plist, plitem_t *gdpl, gamedir_t *gamedir,
dstring_t *path, hashtab_t *dirs, hashtab_t *vars)
{
plitem_t *base_item;
if (!(base_item = PL_ObjectForKey (gdpl, "Inherit")))
return;
switch (PL_Type (base_item)) {
case QFString:
{
const char *base = PL_String (base_item);
if (Hash_Find (dirs, base))
return;
gdpl = PL_ObjectForKey (plist, base);
if (!gdpl) {
Sys_Printf ("base `%s' not found\n", base);
return;
}
qfs_set_var (vars, "gamedir", base);
Hash_Add (dirs, strdup (base));
qfs_get_gd_params (gdpl, gamedir, path, vars);
qfs_inherit (plist, gdpl, gamedir, path, dirs, vars);
}
break;
case QFArray:
{
int i, num_dirs;
plitem_t *basedir_item;
const char *basedir;
num_dirs = PL_A_NumObjects (base_item);
for (i = 0; i < num_dirs; i++) {
basedir_item = PL_ObjectAtIndex (base_item, i);
if (!basedir_item)
continue;
basedir = PL_String (basedir_item);
if (!basedir || Hash_Find (dirs, basedir))
continue;
gdpl = PL_ObjectForKey (plist, basedir);
if (!gdpl) {
Sys_Printf ("base `%s' not found\n", basedir);
continue;
}
qfs_set_var (vars, "gamedir", basedir);
Hash_Add (dirs, strdup (basedir));
qfs_get_gd_params (gdpl, gamedir, path, vars);
qfs_inherit (plist, gdpl, gamedir, path, dirs, vars);
}
}
break;
default:
break;
}
}
static int
qfs_compare (const void *a, const void *b)
{
return strcmp (*(const char **) a, *(const char **) b);
}
static const char *
qfs_dir_get_key (void *_k, void *unused)
{
return _k;
}
static void
qfs_dir_free (void *_k, void *unused)
{
free (_k);
}
static plitem_t *
qfs_find_gamedir (const char *name, hashtab_t *dirs)
{
plitem_t *gdpl = PL_ObjectForKey (qfs_gd_plist, name);
if (!gdpl) {
plitem_t *keys = PL_D_AllKeys (qfs_gd_plist);
int num_keys = PL_A_NumObjects (keys);
const char **list = malloc (num_keys * sizeof (char *));
int i;
for (i = 0; i < num_keys; i++)
list[i] = PL_String (PL_ObjectAtIndex (keys, i));
qsort (list, num_keys, sizeof (const char *), qfs_compare);
while (i--) {
if (!fnmatch (list[i], name, 0)) {
gdpl = PL_ObjectForKey (qfs_gd_plist, list[i]);
Hash_Add (dirs, strdup (list[i]));
break;
}
}
free (list);
PL_Free (keys);
}
return gdpl;
}
static void
qfs_process_path (const char *path, const char *gamedir)
{
const char *e = path + strlen (path);
const char *s = e;
dstring_t *dir = dstring_new ();
while (s >= path) {
while (s != path && s[-1] !=':')
s--;
if (s != e) {
dsprintf (dir, "%.*s", (int) (e - s), s);
qfs_add_gamedir (dir->str);
}
e = --s;
}
dstring_delete (dir);
}
static void
qfs_build_gamedir (const char **list)
{
int j;
gamedir_t *gamedir;
plitem_t *gdpl;
dstring_t *path;
hashtab_t *dirs = Hash_NewTable (31, qfs_dir_get_key, qfs_dir_free, 0);
hashtab_t *vars = qfs_new_vars ();
const char *dir = 0;
qfs_set_var (vars, "game", qfs_game);
if (qfs_gamedir) {
if (qfs_gamedir->name)
free ((char *)qfs_gamedir->name);
if (qfs_gamedir->gamedir)
free ((char *)qfs_gamedir->gamedir);
if (qfs_gamedir->path)
free ((char *)qfs_gamedir->path);
if (qfs_gamedir->gamecode)
free ((char *)qfs_gamedir->gamecode);
if (qfs_gamedir->dir.def)
free ((char *)qfs_gamedir->dir.def);
if (qfs_gamedir->dir.skins)
free ((char *)qfs_gamedir->dir.skins);
if (qfs_gamedir->dir.models)
free ((char *)qfs_gamedir->dir.models);
if (qfs_gamedir->dir.sound)
free ((char *)qfs_gamedir->dir.sound);
if (qfs_gamedir->dir.maps)
free ((char *)qfs_gamedir->dir.maps);
free (qfs_gamedir);
}
while (qfs_searchpaths) {
searchpath_t *next;
if (qfs_searchpaths->pack) {
Qclose (qfs_searchpaths->pack->handle);
free (qfs_searchpaths->pack->files);
free (qfs_searchpaths->pack);
}
if (qfs_searchpaths->filename)
free (qfs_searchpaths->filename);
next = qfs_searchpaths->next;
free (qfs_searchpaths);
qfs_searchpaths = next;
}
for (j = 0; list[j]; j++)
;
gamedir = calloc (1, sizeof (gamedir_t));
path = dstring_newstr ();
while (j--) {
const char *name = va ("%s:%s", qfs_game, dir = list[j]);
if (Hash_Find (dirs, name))
continue;
gdpl = qfs_find_gamedir (name, dirs);
if (!gdpl) {
Sys_Printf ("gamedir `%s' not found\n", name);
continue;
}
Hash_Add (dirs, strdup (name));
if (!j) {
gamedir->name = strdup (name);
gamedir->gamedir = strdup (list[j]);
}
qfs_set_var (vars, "gamedir", dir);
qfs_get_gd_params (gdpl, gamedir, path, vars);
qfs_inherit (qfs_gd_plist, gdpl, gamedir, path, dirs, vars);
}
gamedir->path = path->str;
for (dir = gamedir->path; *dir && *dir != ':'; dir++)
;
gamedir->dir.def = nva ("%.*s", (int) (dir - gamedir->path),
gamedir->path);
if (!gamedir->hudtype)
gamedir->hudtype = strdup ("id");
if (!gamedir->dir.skins)
gamedir->dir.skins = nva ("%s/skins", gamedir->dir.def);
if (!gamedir->dir.models)
gamedir->dir.models = nva ("%s/progs", gamedir->dir.def);
if (!gamedir->dir.sound)
gamedir->dir.sound = nva ("%s/sound", gamedir->dir.def);
if (!gamedir->dir.maps)
gamedir->dir.maps = nva ("%s/maps", gamedir->dir.def);
if (!gamedir->dir.shots)
gamedir->dir.shots = strdup ("QF");
qfs_gamedir = gamedir;
Sys_MaskPrintf (SYS_FS, "%s\n", qfs_gamedir->name);
Sys_MaskPrintf (SYS_FS, " gamedir : %s\n", qfs_gamedir->gamedir);
Sys_MaskPrintf (SYS_FS, " path : %s\n", qfs_gamedir->path);
Sys_MaskPrintf (SYS_FS, " gamecode: %s\n", qfs_gamedir->gamecode);
Sys_MaskPrintf (SYS_FS, " hudtype : %s\n", qfs_gamedir->hudtype);
Sys_MaskPrintf (SYS_FS, " def : %s\n", qfs_gamedir->dir.def);
Sys_MaskPrintf (SYS_FS, " skins : %s\n", qfs_gamedir->dir.skins);
Sys_MaskPrintf (SYS_FS, " models : %s\n", qfs_gamedir->dir.models);
Sys_MaskPrintf (SYS_FS, " sound : %s\n", qfs_gamedir->dir.sound);
Sys_MaskPrintf (SYS_FS, " maps : %s\n", qfs_gamedir->dir.maps);
qfs_process_path (qfs_gamedir->path, dir);
free (path);
Hash_DelTable (dirs);
Hash_DelTable (vars);
}
static void
qfs_load_config (void)
{
QFile *f = 0;
int len;
char *buf;
char *dirconf;
if (*fs_dirconf->string) {
dirconf = Sys_ExpandSquiggle (fs_dirconf->string);
if (!(f = Qopen (dirconf, "rt")))
Sys_MaskPrintf (SYS_FS,
"Could not load `%s', using builtin defaults\n",
dirconf);
free (dirconf);
}
if (!f)
goto no_config;
len = Qfilesize (f);
buf = malloc (len + 3); // +3 for { } and \0
Qread (f, buf + 1, len);
Qclose (f);
// convert the config file to a plist dictionary
buf[0] = '{';
buf[len + 1] = '}';
buf[len + 2] = 0;
if (qfs_gd_plist)
PL_Free (qfs_gd_plist);
qfs_gd_plist = PL_GetPropertyList (buf);
free (buf);
if (qfs_gd_plist && PL_Type (qfs_gd_plist) == QFDictionary)
return; // done
Sys_Printf ("not a dictionary\n");
no_config:
if (qfs_gd_plist)
PL_Free (qfs_gd_plist);
qfs_gd_plist = PL_GetPropertyList (qfs_default_dirconf);
}
/*
qfs_contains_updir
Checks if a string contains an updir ('..'), either at the ends or
surrounded by slashes ('/'). Doesn't check for leading slash.
Assumes canonical (compressed) path.
*/
static inline int
qfs_contains_updir (const char *path, int levels)
{
do {
if (path[0] != '.' || path[1] != '.'
|| (path[2] != '/' && path[2] != 0))
return 0;
if (!path[2])
break;
// first part of path is ../
if (levels <= 0)
return 1;
path += 3;
} while (levels-- > 0);
return 0;
}
static int
qfs_expand_path (dstring_t *full_path, const char *base, const char *path,
int levels)
{
const char *separator = "/";
char *cpath;
int len;
if (!base || !*base) {
errno = EACCES;
return -1;
}
cpath = QFS_CompressPath (path);
if (qfs_contains_updir (cpath, levels)) {
free (cpath);
errno = EACCES;
return -1;
}
if (*cpath == '/')
separator = "";
len = strlen (base);
if (len && base[len - 1] == '/')
len--;
dsprintf (full_path, "%.*s%s%s", len, base, separator, cpath);
free (cpath);
return 0;
}
static int
qfs_expand_userpath (dstring_t *full_path, const char *path)
{
return qfs_expand_path (full_path, qfs_userpath, path, 0);
}
VISIBLE char *
QFS_FileBase (const char *in)
{
const char *base;
const char *ext;
int len;
char *out;
base = QFS_SkipPath (in);
ext = QFS_FileExtension (base);
len = ext - base;
out = malloc (len + 1);
strncpy (out, base, len);
out [len] = 0;
return out;
}
static void
qfs_path_f (void)
{
searchpath_t *s;
Sys_Printf ("Current search path:\n");
for (s = qfs_searchpaths; s; s = s->next) {
if (s->pack)
Sys_Printf ("%s (%i files)\n", s->pack->filename,
s->pack->numfiles);
else
Sys_Printf ("%s\n", s->filename);
}
}
VISIBLE void
QFS_WriteFile (const char *filename, const void *data, int len)
{
QFile *f;
f = QFS_WOpen (filename, 0);
if (!f) {
Sys_Error ("Error opening %s", filename);
}
Qwrite (f, data, len);
Qclose (f);
}
static QFile *
qfs_openread (const char *path, int offs, int len, int zip)
{
QFile *file;
if (offs < 0 || len < 0)
file = Qopen (path, zip ? "rbz" : "rb");
else
file = Qsubopen (path, offs, len, zip);
if (!file) {
Sys_Error ("Couldn't open %s", path);
return 0;
}
qfs_filesize = Qfilesize (file);
return file;
}
VISIBLE char *
QFS_CompressPath (const char *pth)
{
char *p, *d;
char *path= malloc (strlen (pth) + 1);
for (d = path; *pth; d++, pth++) {
if (*pth == '\\')
*d = '/';
else
*d = *pth;
}
*d = 0;
p = path;
while (*p) {
if (p[0] == '.') {
if (p[1] == '.') {
if (p[2] == '/' || p[2] == 0) {
d = p;
if (d > path)
d--;
while (d > path && d[-1] != '/')
d--;
if (d == path
&& d[0] == '.' && d[1] == '.'
&& (d[2] == '/' || d[2] == '\0')) {
p += 2 + (p[2] == '/');
continue;
}
if (d[0] == '/'
&& d[1] == '.' && d[2] == '.'
&& (d[3] == '/' || d[3] == '\0')) {
*p = 0;
p += 2 + (p[2] == '/');
continue;
}
p = p + 2 + (p[2] == '/');
memmove (d, p, strlen (p) + 1);
p = d;
continue;
}
} else if (p[1] == '/') {
memmove (p, p + 2, strlen (p + 2) + 1);
continue;
} else if (p[1] == 0) {
p[0] = 0;
}
}
while (*p && *p != '/')
p++;
if (*p == '/') {
p++;
// skip over multiple / (foo//bar -> foo/bar)
for (d = p; *d == '/'; d++)
;
if (d != p)
memmove (p, d, strlen (d) + 1);
}
}
// strip any trailing /, but not if it's the root /
if (--p > path && *p == '/')
*p = 0;
return path;
}
VISIBLE int file_from_pak; // global indicating file came from pack file ZOID
/*
QFS_FOpenFile
Finds the file in the search path.
Sets qfs_filesize and one of handle or file
*/
static int
open_file (searchpath_t *search, const char *filename, QFile **gzfile,
dstring_t *foundname, int zip)
{
file_from_pak = 0;
// is the element a pak file?
if (search->pack) {
dpackfile_t *packfile;
packfile = pack_find_file (search->pack, filename);
if (packfile) {
Sys_MaskPrintf (SYS_FS_F, "PackFile: %s : %s\n",
search->pack->filename, packfile->name);
// open a new file on the pakfile
if (foundname) {
dstring_clearstr (foundname);
dstring_appendstr (foundname, packfile->name);
}
*gzfile = qfs_openread (search->pack->filename, packfile->filepos,
packfile->filelen, zip);
file_from_pak = 1;
return qfs_filesize;
}
} else {
// check a file in the directory tree
dstring_t *netpath = dstring_new ();
if (qfs_expand_path (netpath, search->filename, filename, 1) == 0) {
if (foundname) {
dstring_clearstr (foundname);
dstring_appendstr (foundname, filename);
}
if (Sys_FileTime (netpath->str) == -1) {
dstring_delete (netpath);
return -1;
}
Sys_MaskPrintf (SYS_FS_F, "FindFile: %s\n", netpath->str);
*gzfile = qfs_openread (netpath->str, -1, -1, zip);
dstring_delete (netpath);
return qfs_filesize;
}
dstring_delete (netpath);
return -1;
}
return -1;
}
VISIBLE int
_QFS_FOpenFile (const char *filename, QFile **gzfile,
dstring_t *foundname, int zip)
{
searchpath_t *search;
char *path;
#ifdef HAVE_VORBIS
char *oggfilename;
#endif
#ifdef HAVE_ZLIB
char *gzfilename;
#endif
// make sure they're not trying to do weird stuff with our private files
path = QFS_CompressPath (filename);
if (qfs_contains_updir(path, 1)) {
Sys_MaskPrintf (SYS_FS,
"FindFile: %s: attempt to escape directory tree!\n",
path);
goto error;
}
#ifdef HAVE_VORBIS
if (strequal (".wav", QFS_FileExtension (path))) {
oggfilename = alloca (strlen (path) + 1);
QFS_StripExtension (path, oggfilename);
strncat (oggfilename, ".ogg",
sizeof (oggfilename) - strlen (oggfilename) - 1);
} else {
oggfilename = 0;
}
#endif
#ifdef HAVE_ZLIB
gzfilename = alloca (strlen (path) + 3 + 1);
sprintf (gzfilename, "%s.gz", path);
#endif
// search through the path, one element at a time
for (search = qfs_searchpaths; search; search = search->next) {
#ifdef HAVE_VORBIS
//NOTE gzipped oggs not supported
if (oggfilename
&& open_file (search, oggfilename, gzfile, foundname, false) != -1)
goto ok;
#endif
#ifdef HAVE_ZLIB
if (open_file (search, gzfilename, gzfile, foundname, zip) != -1)
goto ok;
#endif
if (open_file (search, path, gzfile, foundname, zip) != -1)
goto ok;
}
Sys_MaskPrintf (SYS_FS_NF, "FindFile: can't find %s\n", filename);
error:
*gzfile = NULL;
qfs_filesize = -1;
free (path);
return -1;
ok:
free(path);
return qfs_filesize;
}
VISIBLE int
QFS_FOpenFile (const char *filename, QFile **gzfile)
{
return _QFS_FOpenFile (filename, gzfile, 0, 1);
}
cache_user_t *loadcache;
byte *loadbuf;
int loadsize;
/*
QFS_LoadFile
Filename are relative to the quake directory.
Always appends a 0 byte to the loaded data.
*/
VISIBLE byte *
QFS_LoadFile (const char *path, int usehunk)
{
QFile *h;
byte *buf = NULL;
char *base;
int len;
// look for it in the filesystem or pack files
len = qfs_filesize = QFS_FOpenFile (path, &h);
if (!h)
return NULL;
// extract the filename base name for hunk tag
base = QFS_FileBase (path);
if (usehunk == 1)
buf = Hunk_AllocName (len + 1, base);
else if (usehunk == 2)
buf = Hunk_TempAlloc (len + 1);
else if (usehunk == 0)
buf = calloc (1, len + 1);
else if (usehunk == 3)
buf = Cache_Alloc (loadcache, len + 1, base);
else if (usehunk == 4) {
if (len + 1 > loadsize)
buf = Hunk_TempAlloc (len + 1);
else
buf = loadbuf;
} else
Sys_Error ("QFS_LoadFile: bad usehunk");
if (!buf)
Sys_Error ("QFS_LoadFile: not enough space for %s", path);
buf[len] = 0;
Qread (h, buf, len);
Qclose (h);
free (base);
return buf;
}
VISIBLE byte *
QFS_LoadHunkFile (const char *path)
{
return QFS_LoadFile (path, 1);
}
VISIBLE void
QFS_LoadCacheFile (const char *path, struct cache_user_s *cu)
{
loadcache = cu;
QFS_LoadFile (path, 3);
}
// uses temp hunk if larger than bufsize
VISIBLE byte *
QFS_LoadStackFile (const char *path, void *buffer, int bufsize)
{
byte *buf;
loadbuf = (byte *) buffer;
loadsize = bufsize;
buf = QFS_LoadFile (path, 4);
return buf;
}
/*
qfs_load_pakfile
Takes an explicit (not game tree related) path to a pak file.
Loads the header and directory, adding the files at the beginning
of the list so they override previous pack files.
*/
static pack_t *
qfs_load_pakfile (char *packfile)
{
pack_t *pack = pack_open (packfile);
if (pack)
Sys_MaskPrintf (SYS_FS, "Added packfile %s (%i files)\n",
packfile, pack->numfiles);
return pack;
}
#define FBLOCK_SIZE 32
// Note, this is /NOT/ a work-alike strcmp, this groups numbers sanely.
static int
qfs_file_sort (char **os1, char **os2)
{
int in1, in2, n1, n2;
char *s1, *s2;
s1 = *os1;
s2 = *os2;
while (1) {
in1 = in2 = n1 = n2 = 0;
if ((in1 = isdigit ((byte) *s1)))
n1 = strtol (s1, &s1, 10);
if ((in2 = isdigit ((byte) *s2)))
n2 = strtol (s2, &s2, 10);
if (in1 && in2) {
if (n1 != n2)
return n1 - n2;
} else {
if (*s1 != *s2)
return *s1 - *s2;
else if (*s1 == '\0')
return *s1 - *s2;
s1++;
s2++;
}
}
}
static void
qfs_load_gamedir (const char *dir)
{
searchpath_t *search;
pack_t *pak;
DIR *dir_ptr;
struct dirent *dirent;
char **pakfiles = NULL;
int i = 0, bufsize = 0, count = 0;
Sys_MaskPrintf (SYS_FS, "qfs_load_gamedir (\"%s\")\n", dir);
pakfiles = calloc (1, FBLOCK_SIZE * sizeof (char *));
bufsize += FBLOCK_SIZE;
if (!pakfiles)
goto qfs_load_gamedir_free;
for (i = 0; i < bufsize; i++) {
pakfiles[i] = NULL;
}
dir_ptr = opendir (dir);
if (!dir_ptr)
goto qfs_load_gamedir_free;
while ((dirent = readdir (dir_ptr))) {
if (!fnmatch ("*.pak", dirent->d_name, 0)) {
if (count >= bufsize) {
bufsize += FBLOCK_SIZE;
pakfiles = realloc (pakfiles, bufsize * sizeof (char *));
if (!pakfiles)
goto qfs_load_gamedir_free;
for (i = count; i < bufsize; i++)
pakfiles[i] = NULL;
}
// at this point, dir is known to not have a trailing /, and
// dirent->d_name definitely won't start with one.
pakfiles[count] = nva ("%s/%s", dir, dirent->d_name);
if (!pakfiles[count])
Sys_Error ("qfs_load_gamedir: Memory allocation failure");
count++;
}
}
closedir (dir_ptr);
qsort (pakfiles, count, sizeof (char *),
(int (*)(const void *, const void *)) qfs_file_sort);
for (i = 0; i < count; i++) {
pak = qfs_load_pakfile (pakfiles[i]);
if (!pak) {
Sys_Error ("Bad pakfile %s!!", pakfiles[i]);
} else {
search = malloc (sizeof (searchpath_t));
search->filename = 0;
search->pack = pak;
search->next = qfs_searchpaths;
qfs_searchpaths = search;
}
}
qfs_load_gamedir_free:
for (i = 0; i < count; i++)
free (pakfiles[i]);
free (pakfiles);
}
/*
qfs_add_dir
Adds the directory to the head of the path, then loads and adds pak0.pak
pak1.pak ...
*/
static void
qfs_add_dir (const char *dir)
{
searchpath_t *search;
// add the directory to the search path
search = malloc (sizeof (searchpath_t));
search->filename = strdup (dir);
search->pack = 0;
search->next = qfs_searchpaths;
qfs_searchpaths = search;
// add any pak files in the format pak0.pak pak1.pak, ...
qfs_load_gamedir (dir);
}
static void
qfs_add_gamedir (const char *dir)
{
const char *e;
const char *s;
dstring_t *s_dir;
dstring_t *f_dir;
if (!*dir)
return;
e = fs_sharepath->string + strlen (fs_sharepath->string);
s = e;
s_dir = dstring_new ();
f_dir = dstring_new ();
while (s >= fs_sharepath->string) {
while (s != fs_sharepath->string && s[-1] !=':')
s--;
if (s != e) {
dsprintf (s_dir, "%.*s", (int) (e - s), s);
if (strcmp (s_dir->str, fs_userpath->string) != 0) {
if (qfs_expand_path (f_dir, s_dir->str, dir, 0) != 0) {
Sys_Printf ("dropping bad directory %s\n", dir);
break;
}
Sys_MaskPrintf (SYS_FS, "qfs_add_gamedir (\"%s\")\n",
f_dir->str);
qfs_add_dir (f_dir->str);
}
}
e = --s;
}
qfs_expand_userpath (f_dir, dir);
Sys_MaskPrintf (SYS_FS, "qfs_add_gamedir (\"%s\")\n", f_dir->str);
qfs_add_dir (f_dir->str);
dstring_delete (f_dir);
dstring_delete (s_dir);
}
/*
QFS_Gamedir
Sets the gamedir and path to a different directory.
*/
VISIBLE void
QFS_Gamedir (const char *gamedir)
{
int i;
const char *list[2] = {gamedir, 0};
qfs_build_gamedir (list);
// Make sure everyone else knows we've changed gamedirs
for (i = 0; i < num_gamedir_callbacks; i++) {
gamedir_callbacks[i] (0);
}
Cache_Flush ();
for (i = 0; i < num_gamedir_callbacks; i++) {
gamedir_callbacks[i] (1);
}
}
VISIBLE void
QFS_GamedirCallback (gamedir_callback_t *func)
{
if (num_gamedir_callbacks == max_gamedir_callbacks) {
size_t size = (max_gamedir_callbacks + GAMEDIR_CALLBACK_CHUNK)
* sizeof (gamedir_callback_t *);
gamedir_callbacks = realloc (gamedir_callbacks, size);
if (!gamedir_callbacks)
Sys_Error ("Too many gamedir callbacks!\n");
max_gamedir_callbacks += GAMEDIR_CALLBACK_CHUNK;
}
if (!func) {
Sys_Error ("null gamedir callback\n");
}
gamedir_callbacks[num_gamedir_callbacks] = func;
num_gamedir_callbacks++;
}
static void
qfs_path_cvar (cvar_t *var)
{
char *cpath = QFS_CompressPath (var->string);
if (strcmp (cpath, var->string))
Cvar_Set (var, cpath);
free (cpath);
}
VISIBLE void
QFS_Init (const char *game)
{
int i;
fs_sharepath = Cvar_Get ("fs_sharepath", FS_SHAREPATH, CVAR_ROM,
qfs_path_cvar,
"location of shared (read-only) game "
"directories");
fs_userpath = Cvar_Get ("fs_userpath", FS_USERPATH, CVAR_ROM,
qfs_path_cvar,
"location of your game directories");
fs_dirconf = Cvar_Get ("fs_dirconf", "", CVAR_ROM, NULL,
"full path to gamedir.conf FIXME");
Cmd_AddCommand ("path", qfs_path_f, "Show what paths Quake is using");
qfs_userpath = Sys_ExpandSquiggle (fs_userpath->string);
qfs_load_config ();
qfs_game = game;
if ((i = COM_CheckParm ("-game")) && i < com_argc - 1) {
char *gamedirs = NULL;
const char **list;
char *where;
int j, count = 1;
gamedirs = strdup (com_argv[i + 1]);
for (j = 0; gamedirs[j]; j++)
if (gamedirs[j] == ',')
count++;
list = calloc (count + 1, sizeof (char *));
j = 0;
where = strtok (gamedirs, ",");
while (where) {
list[j++] = where;
where = strtok (NULL, ",");
}
qfs_build_gamedir (list);
free (gamedirs);
free ((void*)list);
} else {
QFS_Gamedir ("");
}
}
VISIBLE const char *
QFS_SkipPath (const char *pathname)
{
const char *last;
// char after last / on the line
if ((last = strrchr (pathname, '/')))
last++;
else
last = pathname;
return last;
}
VISIBLE void
QFS_StripExtension (const char *in, char *out)
{
char *tmp;
if (out != in)
strcpy (out, in);
tmp = out + (QFS_FileExtension (out) - out);
*tmp = 0;
}
VISIBLE const char *
QFS_FileExtension (const char *in)
{
const char *tmp;
const char *end = in + strlen (in);
for (tmp = end; tmp != in; tmp--) {
if (tmp[-1] == '/')
return end;
if (tmp[-1] == '.') {
if (tmp - 1 == in || tmp[-2] == '/')
return end;
return tmp - 1;
}
}
return end;
}
VISIBLE void
QFS_DefaultExtension (dstring_t *path, const char *extension)
{
const char *ext;
// if path doesn't have a .EXT, append extension
// (extension should include the .)
ext = QFS_FileExtension (path->str);
if (*ext)
return; // it has an extension
dstring_appendstr (path, extension);
}
VISIBLE void
QFS_SetExtension (struct dstring_s *path, const char *extension)
{
const char *ext = QFS_FileExtension (path->str);
int offs = ext - path->str;
if (*ext) {
// path has an extension... cut it off
path->str[offs] = 0;
path->size = offs + 1;
}
dstring_appendstr (path, extension);
}
VISIBLE int
QFS_NextFilename (dstring_t *filename, const char *prefix, const char *ext)
{
char *digits;
int i;
int ret = 0;
dstring_t *full_path = dstring_new ();
dsprintf (filename, "%s0000%s", prefix, ext);
digits = filename->str + strlen (prefix);
for (i = 0; i <= 9999; i++) {
digits[0] = i / 1000 + '0';
digits[1] = i / 100 % 10 + '0';
digits[2] = i / 10 % 10 + '0';
digits[3] = i % 10 + '0';
if (qfs_expand_userpath (full_path, filename->str) == -1)
break;
if (Sys_FileTime (full_path->str) == -1) {
// file doesn't exist, so we can use this name
ret = 1;
break;
}
}
dstring_delete (full_path);
return ret;
}
VISIBLE QFile *
QFS_Open (const char *path, const char *mode)
{
dstring_t *full_path = dstring_new ();
QFile *file = 0;
const char *m;
int write = 0;
if (qfs_expand_userpath (full_path, path) == 0) {
Sys_MaskPrintf (SYS_FS, "QFS_Open: %s %s\n", full_path->str, mode);
for (m = mode; *m; m++)
if (*m == 'w' || *m == '+' || *m == 'a')
write = 1;
if (write)
if (Sys_CreatePath (full_path->str) == -1)
goto done;
file = Qopen (full_path->str, mode);
}
done:
dstring_delete (full_path);
return file;
}
VISIBLE QFile *
QFS_WOpen (const char *path, int zip)
{
char mode[5] = "wb\000\000\000";
if (zip) {
mode[2] = 'z';
mode[3] = bound (1, zip, 9) + '0';
}
return QFS_Open (path, mode);
}
VISIBLE int
QFS_Rename (const char *old_path, const char *new_path)
{
dstring_t *full_old = dstring_new ();
dstring_t *full_new = dstring_new ();
int ret;
if ((ret = qfs_expand_userpath (full_old, old_path)) != -1)
if ((ret = qfs_expand_userpath (full_new, new_path)) != -1)
if ((ret = Sys_CreatePath (full_new->str)) != -1) {
Sys_Printf ("QFS_Rename %s %s\n", full_old->str, full_new->str);
ret = Qrename (full_old->str, full_new->str);
}
dstring_delete (full_old);
dstring_delete (full_new);
return ret;
}
VISIBLE int
QFS_Remove (const char *path)
{
dstring_t *full_path = dstring_new ();
int ret;
if ((ret = qfs_expand_userpath (full_path, path)) != -1)
ret = Qremove (full_path->str);
dstring_delete (full_path);
return ret;
}
VISIBLE filelist_t *
QFS_FilelistNew (void)
{
return calloc (1, sizeof (filelist_t));
}
VISIBLE void
QFS_FilelistAdd (filelist_t *filelist, const char *fname, const char *ext)
{
char **new_list;
char *s, *str;
while ((s = strchr(fname, '/')))
fname = s + 1;
if (filelist->count == filelist->size) {
filelist->size += 32;
new_list = realloc (filelist->list, filelist->size * sizeof (char *));
if (!new_list) {
filelist->size -= 32;
return;
}
filelist->list = new_list;
}
str = strdup (fname);
if (ext && (s = strstr(str, va(".%s", ext))))
*s = 0;
filelist->list[filelist->count++] = str;
}
VISIBLE void
QFS_FilelistFill (filelist_t *list, const char *path, const char *ext,
int strip)
{
searchpath_t *search;
DIR *dir_ptr;
struct dirent *dirent;
char *cpath, *cp;
const char *separator = "/";
if (strchr (ext, '/') || strchr (ext, '\\'))
return;
cp = cpath = QFS_CompressPath (path);
if (*cp && cp[strlen (cp) - 1] == '/')
separator = "";
for (search = qfs_searchpaths; search != NULL; search = search->next) {
if (search->pack) {
int i;
pack_t *pak = search->pack;
for (i = 0; i < pak->numfiles; i++) {
char *name = pak->files[i].name;
if (!fnmatch (va("%s%s*.%s", cp, separator, ext), name,
FNM_PATHNAME)
|| !fnmatch (va("%s%s*.%s.gz", cp, separator, ext), name,
FNM_PATHNAME))
QFS_FilelistAdd (list, name, strip ? ext : 0);
}
} else {
dir_ptr = opendir (va ("%s/%s", search->filename, cp));
if (!dir_ptr)
continue;
while ((dirent = readdir (dir_ptr)))
if (!fnmatch (va("*.%s", ext), dirent->d_name, 0)
|| !fnmatch (va("*.%s.gz", ext), dirent->d_name, 0))
QFS_FilelistAdd (list, dirent->d_name, strip ? ext : 0);
closedir (dir_ptr);
}
}
free (cpath);
}
VISIBLE void
QFS_FilelistFree (filelist_t *list)
{
int i;
for (i = 0; i < list->count; i++)
free (list->list[i]);
free (list->list);
free (list);
}
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