History: GetExecutablePath

Source of version: 3 (current)

The following snippets of code find path names from the location of the executable. Use this on initialisation of your App. You can use these paths to define the location of ogre.cfg, plugins.cfg, log files, media files, etcetera.

{maketoc}

!!Windows
Outputs:
* execPath -- The directory in which your executable resides. Like 'c:\ogreprojects\bunnyrpg\Debug\' if your executable is called 'c:\ogreprojects\bunnyrpg\Debug\BunnyProject.exe'
* rootPath -- The directory above the one in which your executable resides. Like 'c:\ogreprojects\bunnyrpg\'



{CODE(wrap="1", colors="c++")}        /// Find parent of executable directory
    TCHAR szPath[MAX_PATH]; 
    std::string execPath;
    std::string rootPath;
    if(GetModuleFileName(hInstance, szPath, MAX_PATH))
    {
        std::string path(szPath);
        size_t last = path.rfind('\\');
        if(last != std::string::npos)
        {
            execPath = path.substr(0, last+1);
            last = path.rfind('\\', last-1);
            if(last != std::string::npos)
                rootPath = path.substr(0, last+1);
        }
    }
    if(rootPath.empty())
    {
        MessageBox( NULL, "Could not locate root path from executable path", "Fatal error", MB_OK | MB_ICONERROR | MB_TASKMODAL);
        exit(0);
    }{CODE}
!!MacOS


{CODE(wrap="1", colors="c++")}#include <CoreFoundation/CoreFoundation.h>

/// This function will locate the path to our application on OS X
std::string MacBundlePath()
{
    char path[1024];
    CFBundleRef mainBundle = CFBundleGetMainBundle();
    if(!mainBundle)
        return "";

    CFURLRef mainBundleURL = CFBundleCopyBundleURL(mainBundle);
    if(!mainBundleURL)
        return "";

    CFStringRef cfStringRef = CFURLCopyFileSystemPath(mainBundleURL, kCFURLPOSIXPathStyle);
    if(!cfStringRef)
        return "";

    CFStringGetCString(cfStringRef, path, 1024, kCFStringEncodingASCII);

    CFRelease(mainBundleURL);
    CFRelease(cfStringRef);

    return std::string(path);
}{CODE}

!!Linux
On Linux, it is considered bad practice to put data or configuration files in a path relative to the location of the executable (see the [http://www.erlenstar.demon.co.uk/unix/faq_2.html#SEC23|Unix Programming Frequently Asked Questions] for more information). If you want to distribute a Linux application, you'd be better advised to respect the [http://www.pathname.com/fhs/|FHS] (Filesystem Hierarchy Standard). Here is a document which gives an overview on how to install games under Linux and how to put the files in the correct directories according to the FHS : [http://pingus.seul.org/~grumbel/tutorials/game_install/install_dirs.html|Linux Games Install And Directory Guide]

However, if you still need to find the executable path, here is a way of doing it in Linux:

Returns:
* The directory in which your executable resides. Like '/usr/local/bin' if your executable is called '/usr/local/bin/myapp'



{CODE(wrap="1", colors="c++")}char* self_exe_dir()
{
    int len;
    static char path[1024];
    char* slash;
    
    // Read symbolic link /proc/self/exe
    
    len = readlink("/proc/self/exe", path, sizeof(path));
    if(len == -1)
        return NULL;

    path[len] = '\0';
        
    // Get the directory in the path by stripping exe name 
    
    slash = strrchr(path, '/');
    if(! slash || slash == path)
        return NULL;
    
    *slash = '\0';    // trip slash and exe name
    
    return path;
}{CODE}
History: GetExecutablePath

Source of version: 3 (current)

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