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
  24 #include "stream/textstream.h"
  25 #include "string/string.h"
  26 #include "stream/stringstream.h"
  27 #include "debugging/debugging.h"
  28 #include "os/path.h"
  29 #include "os/file.h"
  30 #include "cmdlib.h"
  31
  32 int g_argc;
  33 char** g_argv;
  34
  35 void args_init( int argc, char* argv[] ){
  36         int i, j, k;
  37
  38         for ( i = 1; i < argc; i++ )
  39         {
  40                 for ( k = i; k < argc; k++ )
  41                         if ( argv[k] != 0 ) {
  42                                 break;
  43                         }
  44
  45                 if ( k > i ) {
  46                         k -= i;
  47                         for ( j = i + k; j < argc; j++ )
  48                                 argv[j - k] = argv[j];
  49                         argc -= k;
  50                 }
  51         }
  52
  53         g_argc = argc;
  54         g_argv = argv;
  55 }
  56
  57 char *gamedetect_argv_buffer[1024];
  58 void gamedetect_found_game( char *game, char *path ){
  59         int argc;
  60         static char buf[128];
  61
  62         if ( g_argv == gamedetect_argv_buffer ) {
  63                 return;
  64         }
  65
  66         globalOutputStream() << "Detected game " << game << " in " << path << "\n";
  67
  68         sprintf( buf, "-%s-EnginePath", game );
  69         argc = 0;
  70         gamedetect_argv_buffer[argc++] = "-global-gamefile";
  71         gamedetect_argv_buffer[argc++] = game;
  72         gamedetect_argv_buffer[argc++] = buf;
  73         gamedetect_argv_buffer[argc++] = path;
  74         if ( (size_t) ( argc + g_argc ) >= sizeof( gamedetect_argv_buffer ) / sizeof( *gamedetect_argv_buffer ) - 1 ) {
  75                 g_argc = sizeof( gamedetect_argv_buffer ) / sizeof( *gamedetect_argv_buffer ) - g_argc - 1;
  76         }
  77         memcpy( gamedetect_argv_buffer + 4, g_argv, sizeof( *gamedetect_argv_buffer ) * g_argc );
  78         g_argc += argc;
  79         g_argv = gamedetect_argv_buffer;
  80 }
  81
  82 bool gamedetect_check_game( char *gamefile, const char *checkfile1, const char *checkfile2, char *buf /* must have 64 bytes free after bufpos */, int bufpos ){
  83         buf[bufpos] = '/';
  84
  85         strcpy( buf + bufpos + 1, checkfile1 );
  86         globalOutputStream() << "Checking for a game file in " << buf << "\n";
  87         if ( !file_exists( buf ) ) {
  88                 return false;
  89         }
  90
  91         if ( checkfile2 ) {
  92                 strcpy( buf + bufpos + 1, checkfile2 );
  93                 globalOutputStream() << "Checking for a game file in " << buf << "\n";
  94                 if ( !file_exists( buf ) ) {
  95                         return false;
  96                 }
  97         }
  98
  99         buf[bufpos + 1] = 0;
 100         gamedetect_found_game( gamefile, buf );
 101         return true;
 102 }
 103
 104 void gamedetect(){
 105         // if we're inside a Nexuiz install
 106         // default to nexuiz.game (unless the user used an option to inhibit this)
 107         bool nogamedetect = false;
 108         int i;
 109         for ( i = 1; i < g_argc - 1; ++i )
 110                 if ( g_argv[i][0] == '-' ) {
 111                         if ( !strcmp( g_argv[i], "-gamedetect" ) ) {
 112                                 nogamedetect = !strcmp( g_argv[i + 1], "false" );
 113                         }
 114                         ++i;
 115                 }
 116         if ( !nogamedetect ) {
 117                 static char buf[1024 + 64];
 118                 strncpy( buf, environment_get_app_path(), sizeof( buf ) );
 119                 buf[sizeof( buf ) - 1 - 64] = 0;
 120                 if ( !strlen( buf ) ) {
 121                         return;
 122                 }
 123
 124                 char *p = buf + strlen( buf ) - 1; // point directly on the slash of get_app_path
 125                 while ( p != buf )
 126                 {
 127                         // TODO add more games to this
 128
 129                         // try to detect Nexuiz installs
 130 #if defined( WIN32 )
 131                         if ( gamedetect_check_game( "nexuiz.game", "data/common-spog.pk3", "nexuiz.exe", buf, p - buf ) )
 132 #elif defined( __APPLE__ )
 133                         if ( gamedetect_check_game( "nexuiz.game", "data/common-spog.pk3", "Nexuiz.app/Contents/Info.plist", buf, p - buf ) )
 134 #else
 135                         if ( gamedetect_check_game( "nexuiz.game", "data/common-spog.pk3", "nexuiz-linux-glx.sh", buf, p - buf ) )
 136 #endif
 137                         { return; }
 138
 139                         // try to detect Q2World installs
 140                         if ( gamedetect_check_game( "q2w.game", "default/quake2world.version", NULL, buf, p - buf ) ) {
 141                                 return;
 142                         }
 143
 144                         // try to detect Warsow installs
 145                         if ( gamedetect_check_game( "warsow.game", "basewsw/dedicated_autoexec.cfg", NULL, buf, p - buf ) ) {
 146                                 return;
 147                         }
 148
 149                         // we found nothing
 150                         // go backwards
 151                         --p;
 152                         while ( p != buf && *p != '/' && *p != '\\' )
 153                                 --p;
 154                 }
 155         }
 156 }
 157
 158 namespace
 159 {
 160 CopiedString home_path;
 161 CopiedString app_path;
 162 }
 163
 164 const char* environment_get_home_path(){
 165         return home_path.c_str();
 166 }
 167
 168 const char* environment_get_app_path(){
 169         return app_path.c_str();
 170 }
 171
 172 bool portable_app_setup(){
 173         StringOutputStream confdir( 256 );
 174         confdir << app_path.c_str() << "settings/";
 175         if ( file_exists( confdir.c_str() ) ) {
 176                 home_path = confdir.c_str();
 177                 return true;
 178         }
 179         return false;
 180 }
 181
 182 #if defined( POSIX )
 183
 184 #include <stdlib.h>
 185 #include <pwd.h>
 186 #include <unistd.h>
 187
 188 #include <glib.h>
 189
 190 const char* LINK_NAME =
 191 #if defined ( __linux__ )
 192         "/proc/self/exe"
 193 #else // FreeBSD and OSX
 194         "/proc/curproc/file"
 195 #endif
 196 ;
 197
 198 /// brief Returns the filename of the executable belonging to the current process, or 0 if not found.
 199 char* getexename( char *buf ){
 200         /* Now read the symbolic link */
 201         int ret = readlink( LINK_NAME, buf, PATH_MAX );
 202
 203         if ( ret == -1 ) {
 204                 globalOutputStream() << "getexename: falling back to argv[0]: " << makeQuoted( g_argv[0] );
 205                 const char* path = realpath( g_argv[0], buf );
 206                 if ( path == 0 ) {
 207                         /* In case of an error, leave the handling up to the caller */
 208                         return "";
 209                 }
 210         }
 211
 212         /* Ensure proper NUL termination */
 213         buf[ret] = 0;
 214
 215         /* delete the program name */
 216         *( strrchr( buf, '/' ) ) = '\0';
 217
 218         // NOTE: we build app path with a trailing '/'
 219         // it's a general convention in Radiant to have the slash at the end of directories
 220         if ( buf[strlen( buf ) - 1] != '/' ) {
 221                 strcat( buf, "/" );
 222         }
 223
 224         return buf;
 225 }
 226
 227 void environment_init( int argc, char* argv[] ){
 228         // Give away unnecessary root privileges.
 229         // Important: must be done before calling gtk_init().
 230         char *loginname;
 231         struct passwd *pw;
 232         seteuid( getuid() );
 233         if ( geteuid() == 0 && ( loginname = getlogin() ) != 0 &&
 234                  ( pw = getpwnam( loginname ) ) != 0 ) {
 235                 setuid( pw->pw_uid );
 236         }
 237
 238         args_init( argc, argv );
 239
 240         {
 241                 char real[PATH_MAX];
 242                 app_path = getexename( real );
 243                 ASSERT_MESSAGE( !string_empty( app_path.c_str() ), "failed to deduce app path" );
 244         }
 245
 246         if ( !portable_app_setup() ) {
 247                 StringOutputStream home( 256 );
 248                 home << DirectoryCleaned( g_get_home_dir() ) << ".netradiant/";
 249                 Q_mkdir( home.c_str() );
 250                 home_path = home.c_str();
 251         }
 252         gamedetect();
 253 }
 254
 255 #elif defined( WIN32 )
 256
 257 #include <windows.h>
 258
 259 void environment_init( int argc, char* argv[] ){
 260         args_init( argc, argv );
 261
 262         {
 263                 // get path to the editor
 264                 char filename[MAX_PATH + 1];
 265                 GetModuleFileName( 0, filename, MAX_PATH );
 266                 char* last_separator = strrchr( filename, '\\' );
 267                 if ( last_separator != 0 ) {
 268                         *( last_separator + 1 ) = '\0';
 269                 }
 270                 else
 271                 {
 272                         filename[0] = '\0';
 273                 }
 274                 StringOutputStream app( 256 );
 275                 app << PathCleaned( filename );
 276                 app_path = app.c_str();
 277         }
 278
 279         if ( !portable_app_setup() ) {
 280                 char *appdata = getenv( "APPDATA" );
 281                 StringOutputStream home( 256 );
 282                 if ( !appdata || string_empty( appdata ) ) {
 283                         ERROR_MESSAGE( "Application Data folder not available.\n"
 284                                                    "Radiant will use C:\\ for user preferences.\n" );
 285                         home << "C:";
 286                 }
 287                 else
 288                 {
 289                         home << PathCleaned( appdata );
 290                 }
 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