system vs. execvp ?

[Peter Sommerfeld]

Jonathan M Davis wrote:
> Peter Sommerfeld wrote:
>>
>> This works as expected:
>>
>>    string cmd = "dmd src/xyz.d";
>>    int i = system(cmd);
>>
>> But this not:
>>
>>    string[] cmd;
>>    cmd ~= "src/xyz.d";
>>    int i = execvp("dmd",cmd);
>>
>> Of course, dmd is in PATH (Win7).
>>
>> What is wrong here?
>
> Please elaborate on what doesn't work as expected. We can'thelp you if   
> you don't tell us what's wrong.

Well, system(cmd) compiles xyz.d and creates an executable.

execvp(cmd) does call dmd but that behaves as if no arguments
where given (Usage msg etc). No executables are created.

> system should run your command in a new process and return,whereas   
> execvp will run it and never return, because the
> new process replaces your  current one.

I did not know that it does not return. Anyway, it should
compile the args IMHO but it does not.

Peter