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 #elif GDEF_OS_LINUX
 143                         if ( gamedetect_check_game( "nexuiz.game", "data/common-spog.pk3", "nexuiz-linux-glx.sh", buf, p - buf ) )
 144 #else
 145                         if ( gamedetect_check_game( "nexuiz.game", "data/common-spog.pk3", NULL, buf, p - buf ) )
 146 #endif
 147                         { return; }
 148
 149                         // try to detect Quetoo installs
 150                         if ( gamedetect_check_game( "quetoo.game", "default/icons/quetoo.png", NULL, buf, p - buf ) ) {
 151                                 return;
 152                         }
 153
 154                         // try to detect Warsow installs
 155                         if ( gamedetect_check_game( "warsow.game", "basewsw/dedicated_autoexec.cfg", NULL, buf, p - buf ) ) {
 156                                 return;
 157                         }
 158
 159                         // we found nothing
 160                         // go backwards
 161                         --p;
 162                         while ( p != buf && *p != '/' && *p != '\\' )
 163                                 --p;
 164                 }
 165         }
 166 }
 167
 168 namespace
 169 {
 170         // executable file path
 171         CopiedString app_filepath;
 172         // directory paths
 173         CopiedString home_path;
 174         CopiedString app_path;
 175         CopiedString lib_path;
 176         CopiedString data_path;
 177 }
 178
 179 const char* environment_get_app_filepath(){
 180         return app_filepath.c_str();
 181 }
 182
 183 const char* environment_get_home_path(){
 184         return home_path.c_str();
 185 }
 186
 187 const char* environment_get_app_path(){
 188         return app_path.c_str();
 189 }
 190
 191 const char *environment_get_lib_path()
 192 {
 193         return lib_path.c_str();
 194 }
 195
 196 const char *environment_get_data_path()
 197 {
 198         return data_path.c_str();
 199 }
 200
 201 bool portable_app_setup(){
 202         StringOutputStream confdir( 256 );
 203         confdir << app_path.c_str() << "settings/";
 204         if ( file_is_directory( confdir.c_str() ) ) {
 205                 home_path = confdir.c_str();
 206                 return true;
 207         }
 208         return false;
 209 }
 210
 211 #if GDEF_OS_POSIX
 212
 213 #include <stdlib.h>
 214 #include <pwd.h>
 215 #include <unistd.h>
 216
 217 #include <glib.h>
 218
 219 const char* LINK_NAME =
 220 #if GDEF_OS_LINUX
 221         "/proc/self/exe"
 222 #else // FreeBSD and macOS
 223         "/proc/curproc/file"
 224 #endif
 225 ;
 226
 227 /// brief Returns the filename of the executable belonging to the current process, or empty string if not found.
 228 char const* getexename( char *buf ){
 229         /* Now read the symbolic link */
 230         const int ret = readlink( LINK_NAME, buf, PATH_MAX );
 231
 232         if ( ret == -1 ) {
 233                 globalOutputStream() << "getexename: falling back to argv[0]: " << makeQuoted( g_argv[0] );
 234                 if( realpath( g_argv[0], buf ) == 0 ) {
 235                         /* In case of an error, leave the handling up to the caller */
 236                         *buf = '\0';
 237                 }
 238         }
 239         else {
 240                 /* Ensure proper NUL termination */
 241                 buf[ret] = 0;
 242         }
 243
 244         return buf;
 245 }
 246
 247 char const* getexepath( char *buf ) {
 248         /* delete the program name */
 249         *( strrchr( buf, '/' ) ) = '\0';
 250
 251         // NOTE: we build app path with a trailing '/'
 252         // it's a general convention in Radiant to have the slash at the end of directories
 253         if ( buf[strlen( buf ) - 1] != '/' ) {
 254                 strcat( buf, "/" );
 255         }
 256
 257         return buf;
 258 }
 259
 260 void environment_init( int argc, char const* argv[] ){
 261         // Give away unnecessary root privileges.
 262         // Important: must be done before calling gtk_init().
 263         char *loginname;
 264         struct passwd *pw;
 265         seteuid( getuid() );
 266         if ( geteuid() == 0 && ( loginname = getlogin() ) != 0 &&
 267                  ( pw = getpwnam( loginname ) ) != 0 ) {
 268                 setuid( pw->pw_uid );
 269         }
 270
 271         args_init( argc, argv );
 272
 273         {
 274                 char real[PATH_MAX];
 275                 app_filepath = getexename( real );
 276                 ASSERT_MESSAGE( !string_empty( app_filepath.c_str() ), "failed to deduce app path" );
 277
 278                 strncpy( real, app_filepath.c_str(), strlen( app_filepath.c_str() ) );
 279                 app_path = getexepath( real );
 280         }
 281
 282         {
 283                 StringOutputStream buffer;
 284                 buffer << app_path.c_str() << "../lib/" << RADIANT_BASENAME << "/";
 285                 if ( file_is_directory( buffer.c_str() ) ) {
 286                         lib_path = buffer.c_str();
 287                 }
 288                 else {
 289                         lib_path = app_path.c_str();
 290                 }
 291         }
 292
 293         {
 294                 StringOutputStream buffer;
 295                 buffer << app_path.c_str() << "../share/" << RADIANT_BASENAME << "/";
 296                 if ( file_is_directory( buffer.c_str() ) ) {
 297                         data_path = buffer.c_str();
 298                 }
 299                 else {
 300                         data_path = app_path.c_str();
 301                 }
 302         }
 303
 304         if ( !portable_app_setup() ) {
 305                 // this is used on both Linux and macOS
 306                 // but a macOS specific code may be written instead
 307                 StringOutputStream home( 256 );
 308                 home << DirectoryCleaned(g_get_user_config_dir()) << "/" << RADIANT_BASENAME << "/";
 309                 // first create ~/.config
 310                 // since it may be missing on brand new home directory
 311                 Q_mkdir( g_get_user_config_dir() );
 312                 // then create ~/.config/netradiant
 313                 Q_mkdir( home.c_str() );
 314                 home_path = home.c_str();
 315         }
 316         gamedetect();
 317 }
 318
 319 #elif GDEF_OS_WINDOWS
 320
 321 #include <windows.h>
 322
 323 void environment_init( int argc, char const* argv[] ){
 324         args_init( argc, argv );
 325
 326         {
 327                 // get path to the editor
 328                 char filename[MAX_PATH + 1];
 329                 StringOutputStream app_filepath_stream( 256 );
 330                 StringOutputStream app_path_stream( 256 );
 331
 332                 GetModuleFileName( 0, filename, MAX_PATH );
 333
 334                 app_filepath_stream << PathCleaned( filename );
 335                 app_filepath = app_filepath_stream.c_str();
 336
 337                 char* last_separator = strrchr( filename, '\\' );
 338                 if ( last_separator != 0 ) {
 339                         *( last_separator + 1 ) = '\0';
 340                 }
 341                 else
 342                 {
 343                         filename[0] = '\0';
 344                 }
 345
 346                 app_path_stream << PathCleaned( filename );
 347                 app_path = app_path_stream.c_str();
 348
 349                 lib_path = app_path;
 350                 data_path = app_path;
 351         }
 352
 353         if ( !portable_app_setup() ) {
 354                 char *appdata = getenv( "APPDATA" );
 355                 StringOutputStream home( 256 );
 356                 home << PathCleaned( appdata );
 357                 home << "/NetRadiantSettings/";
 358                 Q_mkdir( home.c_str() );
 359                 home_path = home.c_str();
 360         }
 361         gamedetect();
 362 }
 363
 364 #else
 365 #error "unsupported platform"
 366 #endif