]> git.xonotic.org Git - xonotic/netradiant.git/blob - radiant/environment.cpp
Hack around segfault at launch, patch from danfe: https://github.com/TTimo/GtkRadiant...
[xonotic/netradiant.git] / 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