radiant/environment.cpp

   1 /*
   2    Copyright (C) 2001-2006, William Joseph.
   3    All Rights Reserved.
   4
   5    This file is part of GtkRadiant.
   6
   7    GtkRadiant is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    GtkRadiant is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with GtkRadiant; if not, write to the Free Software
  19    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  20  */
  21
  22 #include "environment.h"
  23 #include "globaldefs.h"
  24
  25 #include "stream/textstream.h"
  26 #include "string/string.h"
  27 #include "stream/stringstream.h"
  28 #include "debugging/debugging.h"
  29 #include "os/path.h"
  30 #include "os/file.h"
  31 #include "cmdlib.h"
  32
  33 int g_argc;
  34 char const** g_argv;
  35
  36 void args_init( int argc, char const* argv[] ){
  37         int i, j, k;
  38
  39         for ( i = 1; i < argc; i++ )
  40         {
  41                 for ( k = i; k < argc; k++ )
  42                 {
  43                         if ( argv[k] != 0 ) {
  44                                 break;
  45                         }
  46                 }
  47
  48                 if ( k > i ) {
  49                         k -= i;
  50                         for ( j = i + k; j < argc; j++ )
  51                         {
  52                                 argv[j - k] = argv[j];
  53                         }
  54                         argc -= k;
  55                 }
  56         }
  57
  58         g_argc = argc;
  59         g_argv = argv;
  60 }
  61
  62 char const *gamedetect_argv_buffer[1024];
  63
  64 void gamedetect_found_game( char const *game, char *path ){
  65         int argc;
  66         static char buf[128];
  67
  68         if ( g_argv == gamedetect_argv_buffer ) {
  69                 return;
  70         }
  71
  72         globalOutputStream() << "Detected game " << game << " in " << path << "\n";
  73
  74         sprintf( buf, "-%s-EnginePath", game );
  75         argc = 0;
  76         gamedetect_argv_buffer[argc++] = "-global-gamefile";
  77         gamedetect_argv_buffer[argc++] = game;
  78         gamedetect_argv_buffer[argc++] = buf;
  79         gamedetect_argv_buffer[argc++] = path;
  80         if ( (size_t) ( argc + g_argc ) >= sizeof( gamedetect_argv_buffer ) / sizeof( *gamedetect_argv_buffer ) - 1 ) {
  81                 g_argc = sizeof( gamedetect_argv_buffer ) / sizeof( *gamedetect_argv_buffer ) - g_argc - 1;
  82         }
  83         memcpy( gamedetect_argv_buffer + 4, g_argv, sizeof( *gamedetect_argv_buffer ) * g_argc );
  84         g_argc += argc;
  85         g_argv = gamedetect_argv_buffer;
  86 }
  87
  88 bool gamedetect_check_game( char const *gamefile, const char *checkfile1, const char *checkfile2, char *buf /* must have 64 bytes free after bufpos */, int bufpos ){
  89         buf[bufpos] = '/';
  90
  91         strcpy( buf + bufpos + 1, checkfile1 );
  92         globalOutputStream() << "Checking for a game file in " << buf << "\n";
  93         if ( !file_exists( buf ) ) {
  94                 return false;
  95         }
  96
  97         if ( checkfile2 ) {
  98                 strcpy( buf + bufpos + 1, checkfile2 );
  99                 globalOutputStream() << "Checking for a game file in " << buf << "\n";
 100                 if ( !file_exists( buf ) ) {
 101                         return false;
 102                 }
 103         }
 104
 105         buf[bufpos + 1] = 0;
 106         gamedetect_found_game( gamefile, buf );
 107         return true;
 108 }
 109
 110 void gamedetect(){
 111         // if we're inside a Nexuiz install
 112         // default to nexuiz.game (unless the user used an option to inhibit this)
 113         bool nogamedetect = false;
 114         int i;
 115         for ( i = 1; i < g_argc - 1; ++i )
 116         {
 117                 if ( g_argv[i][0] == '-' ) {
 118                         if ( !strcmp( g_argv[i], "-gamedetect" ) ) {
 119                                 nogamedetect = !strcmp( g_argv[i + 1], "false" );
 120                         }
 121                         ++i;
 122                 }
 123         }
 124         if ( !nogamedetect ) {
 125                 static char buf[1024 + 64];
 126                 strncpy( buf, environment_get_app_path(), sizeof( buf ) );
 127                 buf[sizeof( buf ) - 1 - 64] = 0;
 128                 if ( !strlen( buf ) ) {
 129                         return;
 130                 }
 131
 132                 char *p = buf + strlen( buf ) - 1; // point directly on the slash of get_app_path
 133                 while ( p != buf )
 134                 {
 135                         // TODO add more games to this
 136
 137                         // try to detect Nexuiz installs
 138 #if GDEF_OS_WINDOWS
 139                         if ( gamedetect_check_game( "nexuiz.game", "data/common-spog.pk3", "nexuiz.exe", buf, p - buf ) )
 140 #elif GDEF_OS_MACOS
 141                         if ( gamedetect_check_game( "nexuiz.game", "data/common-spog.pk3", "Nexuiz.app/Contents/Info.plist", buf, p - buf ) )
 142 #else
 143                         if ( gamedetect_check_game( "nexuiz.game", "data/common-spog.pk3", "nexuiz-linux-glx.sh", buf, p - buf ) )
 144 #endif
 145                         { return; }
 146
 147                         // try to detect Quetoo installs
 148                         if ( gamedetect_check_game( "quetoo.game", "default/icons/quetoo.png", NULL, buf, p - buf ) ) {
 149                                 return;
 150                         }
 151
 152                         // try to detect Warsow installs
 153                         if ( gamedetect_check_game( "warsow.game", "basewsw/dedicated_autoexec.cfg", NULL, buf, p - buf ) ) {
 154                                 return;
 155                         }
 156
 157                         // we found nothing
 158                         // go backwards
 159                         --p;
 160                         while ( p != buf && *p != '/' && *p != '\\' )
 161                                 --p;
 162                 }
 163         }
 164 }
 165
 166 namespace
 167 {
 168 CopiedString home_path;
 169 CopiedString app_path;
 170 }
 171
 172 const char* environment_get_home_path(){
 173         return home_path.c_str();
 174 }
 175
 176 const char* environment_get_app_path(){
 177         return app_path.c_str();
 178 }
 179
 180 bool portable_app_setup(){
 181         StringOutputStream confdir( 256 );
 182         confdir << app_path.c_str() << "settings/";
 183         if ( file_exists( confdir.c_str() ) ) {
 184                 home_path = confdir.c_str();
 185                 return true;
 186         }
 187         return false;
 188 }
 189
 190 #if GDEF_OS_POSIX
 191
 192 #include <stdlib.h>
 193 #include <pwd.h>
 194 #include <unistd.h>
 195
 196 #include <glib.h>
 197
 198 const char* LINK_NAME =
 199 #if GDEF_OS_LINUX
 200         "/proc/self/exe"
 201 #else // FreeBSD and OSX
 202         "/proc/curproc/file"
 203 #endif
 204 ;
 205
 206 /// brief Returns the filename of the executable belonging to the current process, or 0 if not found.
 207 char const* getexename( char *buf ){
 208         /* Now read the symbolic link */
 209         int ret = readlink( LINK_NAME, buf, PATH_MAX );
 210
 211         if ( ret == -1 ) {
 212                 globalOutputStream() << "getexename: falling back to argv[0]: " << makeQuoted( g_argv[0] );
 213                 const char* path = realpath( g_argv[0], buf );
 214                 if ( path == 0 ) {
 215                         /* In case of an error, leave the handling up to the caller */
 216                         return "";
 217                 }
 218         }
 219
 220         /* Ensure proper NUL termination */
 221         buf[ret] = 0;
 222
 223         /* delete the program name */
 224         *( strrchr( buf, '/' ) ) = '\0';
 225
 226         // NOTE: we build app path with a trailing '/'
 227         // it's a general convention in Radiant to have the slash at the end of directories
 228         if ( buf[strlen( buf ) - 1] != '/' ) {
 229                 strcat( buf, "/" );
 230         }
 231
 232         return buf;
 233 }
 234
 235 void environment_init( int argc, char const* argv[] ){
 236         // Give away unnecessary root privileges.
 237         // Important: must be done before calling gtk_init().
 238         char *loginname;
 239         struct passwd *pw;
 240         seteuid( getuid() );
 241         if ( geteuid() == 0 && ( loginname = getlogin() ) != 0 &&
 242                  ( pw = getpwnam( loginname ) ) != 0 ) {
 243                 setuid( pw->pw_uid );
 244         }
 245
 246         args_init( argc, argv );
 247
 248         {
 249                 char real[PATH_MAX];
 250                 app_path = getexename( real );
 251                 ASSERT_MESSAGE( !string_empty( app_path.c_str() ), "failed to deduce app path" );
 252         }
 253
 254         if ( !portable_app_setup() ) {
 255                 StringOutputStream home( 256 );
 256                 home << DirectoryCleaned( g_get_user_config_dir() ) << "netradiant/";
 257                 Q_mkdir( home.c_str() );
 258                 home_path = home.c_str();
 259         }
 260         gamedetect();
 261 }
 262
 263 #elif GDEF_OS_WINDOWS
 264
 265 #include <windows.h>
 266
 267 void environment_init( int argc, char const* argv[] ){
 268         args_init( argc, argv );
 269
 270         {
 271                 // get path to the editor
 272                 char filename[MAX_PATH + 1];
 273                 GetModuleFileName( 0, filename, MAX_PATH );
 274                 char* last_separator = strrchr( filename, '\\' );
 275                 if ( last_separator != 0 ) {
 276                         *( last_separator + 1 ) = '\0';
 277                 }
 278                 else
 279                 {
 280                         filename[0] = '\0';
 281                 }
 282                 StringOutputStream app( 256 );
 283                 app << PathCleaned( filename );
 284                 app_path = app.c_str();
 285         }
 286
 287         if ( !portable_app_setup() ) {
 288                 char *appdata = getenv( "APPDATA" );
 289                 StringOutputStream home( 256 );
 290                 home << PathCleaned( appdata );
 291                 home << "/NetRadiantSettings/";
 292                 Q_mkdir( home.c_str() );
 293                 home_path = home.c_str();
 294         }
 295         gamedetect();
 296 }
 297
 298 #else
 299 #error "unsupported platform"
 300 #endif