src/porting.cpp

   1 /*
   2 Minetest-c55
   3 Copyright (C) 2010 celeron55, Perttu Ahola <celeron55@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation; either version 2 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License along
  16 with this program; if not, write to the Free Software Foundation, Inc.,
  17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 /*
  21         Random portability stuff
  22
  23         See comments in porting.h
  24 */
  25
  26 #include "porting.h"
  27 #include "config.h"
  28 #include "debug.h"
  29 #include "filesys.h"
  30 #include "log.h"
  31
  32 #ifdef __APPLE__
  33         #include "CoreFoundation/CoreFoundation.h"
  34 #endif
  35
  36 namespace porting
  37 {
  38
  39 /*
  40         Signal handler (grabs Ctrl-C on POSIX systems)
  41 */
  42
  43 bool g_killed = false;
  44
  45 bool * signal_handler_killstatus(void)
  46 {
  47         return &g_killed;
  48 }
  49
  50 #if !defined(_WIN32) // POSIX
  51         #include <signal.h>
  52
  53 void sigint_handler(int sig)
  54 {
  55         if(g_killed == false)
  56         {
  57                 dstream<<DTIME<<"INFO: sigint_handler(): "
  58                                 <<"Ctrl-C pressed, shutting down."<<std::endl;
  59
  60                 // Comment out for less clutter when testing scripts
  61                 /*dstream<<DTIME<<"INFO: sigint_handler(): "
  62                                 <<"Printing debug stacks"<<std::endl;
  63                 debug_stacks_print();*/
  64
  65                 g_killed = true;
  66         }
  67         else
  68         {
  69                 (void)signal(SIGINT, SIG_DFL);
  70         }
  71 }
  72
  73 void signal_handler_init(void)
  74 {
  75         (void)signal(SIGINT, sigint_handler);
  76 }
  77
  78 #else // _WIN32
  79         #include <signal.h>
  80         #include <windows.h>
  81
  82         BOOL WINAPI event_handler(DWORD sig)
  83         {
  84                 switch(sig)
  85                 {
  86                 case CTRL_C_EVENT:
  87                 case CTRL_CLOSE_EVENT:
  88                 case CTRL_LOGOFF_EVENT:
  89                 case CTRL_SHUTDOWN_EVENT:
  90
  91                         if(g_killed == false)
  92                         {
  93                                 dstream<<DTIME<<"INFO: event_handler(): "
  94                                                 <<"Ctrl+C, Close Event, Logoff Event or Shutdown Event, shutting down."<<std::endl;
  95                                 // Comment out for less clutter when testing scripts
  96                                 /*dstream<<DTIME<<"INFO: event_handler(): "
  97                                                 <<"Printing debug stacks"<<std::endl;
  98                                 debug_stacks_print();*/
  99
 100                                 g_killed = true;
 101                         }
 102                         else
 103                         {
 104                                 (void)signal(SIGINT, SIG_DFL);
 105                         }
 106
 107                         break;
 108                 case CTRL_BREAK_EVENT:
 109                         break;
 110                 }
 111
 112                 return TRUE;
 113         }
 114
 115 void signal_handler_init(void)
 116 {
 117         SetConsoleCtrlHandler( (PHANDLER_ROUTINE)event_handler,TRUE);
 118 }
 119
 120 #endif
 121
 122 /*
 123         Path mangler
 124 */
 125
 126 // Default to RUN_IN_PLACE style relative paths
 127 std::string path_share = "..";
 128 std::string path_user = "..";
 129
 130 std::string getDataPath(const char *subpath)
 131 {
 132         return path_share + DIR_DELIM + subpath;
 133 }
 134
 135 void pathRemoveFile(char *path, char delim)
 136 {
 137         // Remove filename and path delimiter
 138         int i;
 139         for(i = strlen(path)-1; i>=0; i--)
 140         {
 141                 if(path[i] == delim)
 142                         break;
 143         }
 144         path[i] = 0;
 145 }
 146
 147 void initializePaths()
 148 {
 149 #ifdef RUN_IN_PLACE
 150         /*
 151                 Use relative paths if RUN_IN_PLACE
 152         */
 153
 154         infostream<<"Using relative paths (RUN_IN_PLACE)"<<std::endl;
 155
 156         /*
 157                 Windows
 158         */
 159         #if defined(_WIN32)
 160                 #include <windows.h>
 161
 162         const DWORD buflen = 1000;
 163         char buf[buflen];
 164         DWORD len;
 165
 166         // Find path of executable and set path_share relative to it
 167         len = GetModuleFileName(GetModuleHandle(NULL), buf, buflen);
 168         assert(len < buflen);
 169         pathRemoveFile(buf, '\\');
 170
 171         path_share = std::string(buf) + "\\..";
 172         path_user = std::string(buf) + "\\..";
 173
 174         /*
 175                 Linux
 176         */
 177         #elif defined(linux)
 178                 #include <unistd.h>
 179
 180         char buf[BUFSIZ];
 181         memset(buf, 0, BUFSIZ);
 182         // Get path to executable
 183         assert(readlink("/proc/self/exe", buf, BUFSIZ-1) != -1);
 184
 185         pathRemoveFile(buf, '/');
 186
 187         path_share = std::string(buf) + "/..";
 188         path_user = std::string(buf) + "/..";
 189
 190         /*
 191                 OS X
 192         */
 193         #elif defined(__APPLE__) || defined(__FreeBSD__)
 194
 195         //TODO: Get path of executable. This assumes working directory is bin/
 196         dstream<<"WARNING: Relative path not properly supported on OS X and FreeBSD"
 197                         <<std::endl;
 198         path_share = std::string("..");
 199         path_user = std::string("..");
 200
 201         #endif
 202
 203 #else // RUN_IN_PLACE
 204
 205         /*
 206                 Use platform-specific paths otherwise
 207         */
 208
 209         infostream<<"Using system-wide paths (NOT RUN_IN_PLACE)"<<std::endl;
 210
 211         /*
 212                 Windows
 213         */
 214         #if defined(_WIN32)
 215                 #include <windows.h>
 216
 217         const DWORD buflen = 1000;
 218         char buf[buflen];
 219         DWORD len;
 220
 221         // Find path of executable and set path_share relative to it
 222         len = GetModuleFileName(GetModuleHandle(NULL), buf, buflen);
 223         assert(len < buflen);
 224         pathRemoveFile(buf, '\\');
 225
 226         // Use ".\bin\.."
 227         path_share = std::string(buf) + "\\..";
 228
 229         // Use "C:\Documents and Settings\user\Application Data\<PROJECT_NAME>"
 230         len = GetEnvironmentVariable("APPDATA", buf, buflen);
 231         assert(len < buflen);
 232         path_user = std::string(buf) + DIR_DELIM + PROJECT_NAME;
 233
 234         /*
 235                 Linux
 236         */
 237         #elif defined(linux)
 238                 #include <unistd.h>
 239
 240         char buf[BUFSIZ];
 241         memset(buf, 0, BUFSIZ);
 242         // Get path to executable
 243         assert(readlink("/proc/self/exe", buf, BUFSIZ-1) != -1);
 244
 245         pathRemoveFile(buf, '/');
 246
 247         path_share = std::string(buf) + "/../share/" + PROJECT_NAME;
 248         //path_share = std::string(INSTALL_PREFIX) + "/share/" + PROJECT_NAME;
 249         if (!fs::PathExists(path_share)) {
 250                 dstream<<"WARNING: system-wide share not found at \""<<path_share<<"\"";
 251                 path_share = std::string(buf) + "/..";
 252                 dstream<<"WARNING: Using \""<<path_share<<"\" instead."<<std::endl;
 253         }
 254
 255         path_user = std::string(getenv("HOME")) + "/." + PROJECT_NAME;
 256
 257         /*
 258                 OS X
 259         */
 260         #elif defined(__APPLE__)
 261                 #include <unistd.h>
 262
 263     // Code based on
 264     // http://stackoverflow.com/questions/516200/relative-paths-not-working-in-xcode-c
 265     CFBundleRef main_bundle = CFBundleGetMainBundle();
 266     CFURLRef resources_url = CFBundleCopyResourcesDirectoryURL(main_bundle);
 267     char path[PATH_MAX];
 268     if(CFURLGetFileSystemRepresentation(resources_url, TRUE, (UInt8 *)path, PATH_MAX))
 269         {
 270                 dstream<<"Bundle resource path: "<<path<<std::endl;
 271                 //chdir(path);
 272                 path_share = std::string(path) + "/share";
 273         }
 274         else
 275     {
 276         // error!
 277                 dstream<<"WARNING: Could not determine bundle resource path"<<std::endl;
 278     }
 279     CFRelease(resources_url);
 280
 281         path_user = std::string(getenv("HOME")) + "/Library/Application Support/" + PROJECT_NAME;
 282
 283         #elif defined(__FreeBSD__)
 284
 285         path_share = std::string(INSTALL_PREFIX) + "/share/" + PROJECT_NAME;
 286         path_user = std::string(getenv("HOME")) + "/." + PROJECT_NAME;
 287
 288         #endif
 289
 290 #endif // RUN_IN_PLACE
 291 }
 292
 293 } //namespace porting
 294