On Fri, Oct 7, 2016 at 6:27 PM, Martin Sebor <msebor@xxxxxxxxx> wrote: > > Right. In a hosted environment argv must not be null. It's > up to the implementation to guarantee that for all conforming > programs. If a program is non-conforming (e.g., it calls exceve > or its equivalent to start a program with a null argv) it's still > up to the implementation to decide what to do with it (it could > simply punt and pass the null through or it could substitute > an array of pointers for it with the first one set to null). > Thanks for your answer, Martin. Looks like the argv can be NULL in reality. -- Yao (齐尧)