Linux JavaFX Launcher with fixed GetProgramPath()

launcher.cpp

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#include <dlfcn.h>
#include <locale.h>
#include <string>
#include <libgen.h>
#include <stdio.h>
#include <unistd.h>


typedef bool (*start_launcher)(int argc, char* argv[]);
typedef void (*stop_launcher)();

#define MAX_PATH 1024

std::string GetProgramPath() {
    std::string result;
    char buffer[MAX_PATH] = {0};
    
    ssize_t len;
    if ((len = readlink("/proc/self/exe", buffer, sizeof(buffer)-1)) != -1) {
        result = buffer;
    }
    
    return result;
}

int main(int argc, char *argv[]) {
    int result = 1;
    setlocale(LC_ALL, "en_US.utf8");
    void* library = NULL;
    
    {
        std::string programPath = GetProgramPath();
        std::string libraryName = dirname((char*)programPath.c_str());
        libraryName += "/libpackager.so";
        library = dlopen(libraryName.c_str(), RTLD_LAZY);
        
        if (library == NULL) {
            printf("%s not found.\n", libraryName.c_str());
        }
    }
    
    if (library != NULL) {
        start_launcher start = (start_launcher)dlsym(library, "start_launcher");
        stop_launcher stop = (stop_launcher)dlsym(library, "stop_launcher");
        
        if (start(argc, argv) == true) {
            result = 0;
            
            if (stop != NULL) {
                stop();
            }
        }
        dlclose(library);
    }
    
    
    return result;
}