#ifdef TW_CRYPTO_SYSTEM_VOLD_DEBUG
bool strace_ing(void) {
    static int ret = -1;

    if (ret != -1)
        return ret;

    if (!TWFunc::Path_Exists("/sbin/strace")) {
        LOGDECRYPT("strace binary not found, disabling strace_ing vold_decrypt!\n");
        ret = 0;
    } else
        ret = 1;

    return ret;
}

pid_t strace_init(void) {
    if (!strace_ing())
        return -1;

    pid_t pid;
    int status;
    switch(pid = fork())
    {
        case -1:
            LOGDECRYPT_KMSG("forking strace_init failed: %d!\n", errno);
            return -1;
        case 0: // child
            execl("/sbin/strace", "strace", "-q", "-tt", "-ff", "-v", "-y", "-s", "1000", "-o", "/tmp/strace_init.log", "-p", "1" , NULL);
            LOGDECRYPT_KMSG("strace_init fork failed: %d!\n", errno);
            return -1;
        default:
            LOGDECRYPT_KMSG("Starting strace_init (pid=%d)\n", pid);
            //strace_ing = true;
            return pid;
    }
}
#endif

bool timeout_ing(void) {
    static int ret = -1;

    if (ret != -1)
        return ret;

    if (!TWFunc::Path_Exists("/sbin/timeout")) {
        LOGDECRYPT("timeout binary not found, disabling timeout_ing vold_decrypt!\n");
        ret = 0;
    } else
        ret = 1;

    return ret;
}

string vdc_cryptfs_cmd(string info_text) {
    string cmd;

    cmd = "LD_LIBRARY_PATH=/system/lib64:/system/lib /system/bin/vdc cryptfs ";

#ifdef TW_CRYPTO_SYSTEM_VOLD_DEBUG
    if (timeout_ing() && strace_ing())
        cmd = "/sbin/timeout -t 30 /sbin/strace -q -tt -ff -v -y -s 1000 -o /tmp/strace_vdc_" + info_text + " -E " + cmd;
    else if (strace_ing())
        cmd = "/sbin/strace -q -tt -ff -v -y -s 1000 -o /tmp/strace_vdc_" + info_text + " -E " + cmd;
    else
#endif
    if (timeout_ing())
        cmd = "/sbin/timeout -t 30 env " + cmd;

    return cmd;
}