Function applicationFilePath_fromArgv

Global/ProcInfo.cpp:195–252

#if defined( __NATRON_UNIX__ )
static std::string
applicationFilePath_fromArgv(const char* argv0Param)
{
    std::string argv0;
    if (argv0Param) {
        argv0 = std::string(argv0Param);
    }
    std::string absPath;

    if ( !argv0.empty() && ( argv0[0] == '/' ) ) {
        /*
           If argv0 starts with a slash, it is already an absolute
           file path.
         */
        absPath = argv0;
    } else if ( argv0.find_first_of("/") != std::string::npos ) {
        /*
           If argv0 contains one or more slashes, it is a file path
           relative to the current directory.
         */
        char* cwd = rpl_getcwd(NULL, 0);
        absPath = cwd;
        std::free(cwd);
        absPath.append(argv0);
    } else {
        /*
           Otherwise, the file path has to be determined using the
           PATH environment variable.
         */
        std::string pEnv = getenv("PATH");
        char* cwd = rpl_getcwd(NULL, 0);
        std::string currentDirPath = cwd;
        std::free(cwd);
        std::vector<std::string> paths = StrUtils::split(pEnv, ':');
        for (std::vector<std::string>::const_iterator it = paths.begin(); it != paths.end(); ++it) {
            if (it->empty()) {
                continue;
            }
            std::string candidate = currentDirPath;
            candidate.append(*it + '/' + argv0);

            struct stat _s;
            if (stat(candidate.c_str(), &_s) == -1) {
                continue;
            }
            if ( S_ISDIR(_s.st_mode) ) {
                continue;
            }

            absPath = candidate;
            break;
        }
    }

    absPath = StrUtils::cleanPath(absPath);

    return absPath;
} // applicationFilePath_fromArgv