[iNvectus]

FM_Time is the total uptime of the server. It needs no arguments from what I see in the source:

    case FM_Time:
        fId = MF_RegisterSPForwardByName(amx, funcname, FP_DONE);
        ENGHOOK(Time);
        break;

and it is natively calling engfunc:

// pfnTime
SIMPLE_FLOAT_HOOK_VOID(Time);

#define SIMPLE_FLOAT_HOOK_VOID(call) \
    float call () \
    { \
        FM_ENG_HANDLE(FM_##call, (Engine[FM_##call].at(i))); \
        RETURN_META_VALUE(mswi(lastFmRes), (float)mFloatResult); \
    } \
    float call##_post () \
    { \
        FM_ENG_HANDLE_POST(FM_##call, (EnginePost[FM_##call].at(i))); \
        RETURN_META_VALUE(MRES_IGNORED, (float)mFloatResult); \
    }

So what we have so far?

You have several ways of doing this:

• Hooking FM_Time for unknown reason
• Calling engfunc directly

#include <amxmodx>
#include <fakemeta>

public plugin_init() {
    register_plugin("Blabla", "1.0", "blabla");

    register_forward(FM_Time, "fwFmTime");
    register_srvcmd("fmtest", "cmdFmTest");
}

/*! EngFunc */
public fmTest() {
    server_print("FM_Time aka EngFunc_Time: %f", engfunc(EngFunc_Time));
}

/*! Hooking */
public fwFmTime() {
    // We are inside
}