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         bool nogamedetect = true;
 115         int i;
 116         for ( i = 1; i < g_argc - 1; ++i )
 117         {
 118                 if ( g_argv[i][0] == '-' ) {
 119                         if ( !strcmp( g_argv[i], "-gamedetect" ) ) {
 120                                 nogamedetect = !strcmp( g_argv[i + 1], "false" );
 121                         }
 122                         ++i;
 123                 }
 124         }
 125         if ( !nogamedetect ) {
 126                 static char buf[1024 + 64];
 127                 strncpy( buf, environment_get_app_path(), sizeof( buf ) );
 128                 buf[sizeof( buf ) - 1 - 64] = 0;
 129                 if ( !strlen( buf ) ) {
 130                         return;
 131                 }
 132
 133                 char *p = buf + strlen( buf ) - 1; // point directly on the slash of get_app_path
 134                 while ( p != buf )
 135                 {
 136                         // TODO add more games to this
 137
 138                         // try to detect Nexuiz installs
 139 #if GDEF_OS_WINDOWS
 140                         if ( gamedetect_check_game( "nexuiz.game", "data/common-spog.pk3", "nexuiz.exe", buf, p - buf ) )
 141 #elif GDEF_OS_MACOS
 142                         if ( gamedetect_check_game( "nexuiz.game", "data/common-spog.pk3", "Nexuiz.app/Contents/Info.plist", buf, p - buf ) )
 143 #else
 144                         if ( gamedetect_check_game( "nexuiz.game", "data/common-spog.pk3", "nexuiz-linux-glx.sh", buf, p - buf ) )
 145 #endif
 146                         { return; }
 147
 148                         // try to detect Quetoo installs
 149                         if ( gamedetect_check_game( "quetoo.game", "default/icons/quetoo.png", NULL, buf, p - buf ) ) {
 150                                 return;
 151                         }
 152
 153                         // try to detect Warsow installs
 154                         if ( gamedetect_check_game( "warsow.game", "basewsw/dedicated_autoexec.cfg", NULL, buf, p - buf ) ) {
 155                                 return;
 156                         }
 157
 158                         // we found nothing
 159                         // go backwards
 160                         --p;
 161                         while ( p != buf && *p != '/' && *p != '\\' )
 162                                 --p;
 163                 }
 164         }
 165 }
 166
 167 namespace
 168 {
 169 CopiedString home_path;
 170 CopiedString app_path;
 171 }
 172
 173 const char* environment_get_home_path(){
 174         return home_path.c_str();
 175 }
 176
 177 const char* environment_get_app_path(){
 178         return app_path.c_str();
 179 }
 180
 181 bool portable_app_setup(){
 182         StringOutputStream confdir( 256 );
 183         confdir << app_path.c_str() << "settings/";
 184         if ( file_exists( confdir.c_str() ) ) {
 185                 home_path = confdir.c_str();
 186                 return true;
 187         }
 188         return false;
 189 }
 190
 191
 192 const char* openCmdMap;
 193
 194 void cmdMap(){
 195         openCmdMap = NULL;
 196         for ( int i = 1; i < g_argc; ++i )
 197         {
 198                 //if ( !stricmp( g_argv[i] + strlen(g_argv[i]) - 4, ".map" ) ){
 199                 if( string_equal_suffix_nocase( g_argv[i], ".map" ) ){
 200                         openCmdMap = g_argv[i];
 201                 }
 202         }
 203 }
 204
 205 #if GDEF_OS_POSIX
 206
 207 #include <stdlib.h>
 208 #include <pwd.h>
 209 #include <unistd.h>
 210
 211 #include <glib.h>
 212
 213 const char* LINK_NAME =
 214 #if GDEF_OS_LINUX
 215         "/proc/self/exe"
 216 #else // FreeBSD and OSX
 217         "/proc/curproc/file"
 218 #endif
 219 ;
 220
 221 /// brief Returns the filename of the executable belonging to the current process, or 0 if not found.
 222 char const* getexename( char *buf ){
 223         /* Now read the symbolic link */
 224         int ret = readlink( LINK_NAME, buf, PATH_MAX );
 225
 226         if ( ret == -1 ) {
 227                 globalOutputStream() << "getexename: falling back to argv[0]: " << makeQuoted( g_argv[0] );
 228                 const char* path = realpath( g_argv[0], buf );
 229                 if ( path == 0 ) {
 230                         /* In case of an error, leave the handling up to the caller */
 231                         return "";
 232                 }
 233         }
 234
 235         /* Ensure proper NUL termination */
 236         buf[ret] = 0;
 237
 238         /* delete the program name */
 239         *( strrchr( buf, '/' ) ) = '\0';
 240
 241         // NOTE: we build app path with a trailing '/'
 242         // it's a general convention in Radiant to have the slash at the end of directories
 243         if ( buf[strlen( buf ) - 1] != '/' ) {
 244                 strcat( buf, "/" );
 245         }
 246
 247         return buf;
 248 }
 249
 250 void environment_init( int argc, char const* argv[] ){
 251         // Give away unnecessary root privileges.
 252         // Important: must be done before calling gtk_init().
 253         char *loginname;
 254         struct passwd *pw;
 255         seteuid( getuid() );
 256         if ( geteuid() == 0 && ( loginname = getlogin() ) != 0 &&
 257                  ( pw = getpwnam( loginname ) ) != 0 ) {
 258                 setuid( pw->pw_uid );
 259         }
 260
 261         args_init( argc, argv );
 262
 263         {
 264                 char real[PATH_MAX];
 265                 app_path = getexename( real );
 266                 ASSERT_MESSAGE( !string_empty( app_path.c_str() ), "failed to deduce app path" );
 267         }
 268
 269         if ( !portable_app_setup() ) {
 270                 StringOutputStream home( 256 );
 271                 home << DirectoryCleaned( g_get_user_config_dir() ) << "netradiant/";
 272                 Q_mkdir( home.c_str() );
 273                 home_path = home.c_str();
 274         }
 275         gamedetect();
 276         cmdMap();
 277 }
 278
 279 #elif GDEF_OS_WINDOWS
 280
 281 #include <windows.h>
 282
 283 void environment_init( int argc, char const* argv[] ){
 284         args_init( argc, argv );
 285
 286         {
 287                 // get path to the editor
 288                 char filename[MAX_PATH + 1];
 289                 GetModuleFileName( 0, filename, MAX_PATH );
 290                 char* last_separator = strrchr( filename, '\\' );
 291                 if ( last_separator != 0 ) {
 292                         *( last_separator + 1 ) = '\0';
 293                 }
 294                 else
 295                 {
 296                         filename[0] = '\0';
 297                 }
 298                 StringOutputStream app( 256 );
 299                 app << PathCleaned( filename );
 300                 app_path = app.c_str();
 301         }
 302
 303         if ( !portable_app_setup() ) {
 304                 char *appdata = getenv( "APPDATA" );
 305                 StringOutputStream home( 256 );
 306                 home << PathCleaned( appdata );
 307                 home << "/NetRadiantSettings/";
 308                 Q_mkdir( home.c_str() );
 309                 home_path = home.c_str();
 310         }
 311         gamedetect();
 312         cmdMap();
 313 }
 314
 315 #else
 316 #error "unsupported platform"
 317 #endif