Method execute

base/common/ReplxxLineReader.cpp:235–277

}

int ReplxxLineReader::execute(const std::string & command)
{
    std::vector<char> argv0("sh", &("sh"[3]));
    std::vector<char> argv1("-c", &("-c"[3]));
    std::vector<char> argv2(command.data(), command.data() + command.size() + 1);

    const char * filename = "/bin/sh";
    char * const argv[] = {argv0.data(), argv1.data(), argv2.data(), nullptr};

    static void * real_vfork = dlsym(RTLD_DEFAULT, "vfork");
    if (!real_vfork)
    {
        rx.print("Cannot find symbol vfork in myself: %s\n", errnoToString(errno).c_str());
        return -1;
    }

    pid_t pid = reinterpret_cast<pid_t (*)()>(real_vfork)();

    if (-1 == pid)
    {
        rx.print("Cannot vfork: %s\n", errnoToString(errno).c_str());
        return -1;
    }

    if (0 == pid)
    {
        sigset_t mask;
        sigemptyset(&mask);
        sigprocmask(0, nullptr, &mask);
        sigprocmask(SIG_UNBLOCK, &mask, nullptr);

        execv(filename, argv);
        _exit(-1);
    }

    int status = 0;
    if (-1 == waitpid(pid, &status, 0))
    {
        rx.print("Cannot waitpid: %s\n", errnoToString(errno).c_str());
        return -1;
    }
    return status;
}

void ReplxxLineReader::openEditor()
{