MLGetSymbol()

#include "mathlink.h"

/* read a symbol from a link */

void f(MLINK lp)
{
    const char *symbol;

    if(! MLGetSymbol(lp, &symbol))
        {
            /* unable to read the symbol from lp */
            return;
        }

    /* ... */

    MLReleaseSymbol(lp, symbol);
}