Thierry Boudet wrote:
> Thorsten Froehlich wrote:
>> 
>> #include <stdlib.h>
>> #include <stdio.h>
>> int main(int ac, char **av)
>> {
>>     printf("Result: %d\n", system(av[1]));
>>     return 0;
>> }
>> 
>> This should work and demonstrate that the system works correctly and only
> 
>     Don't work. In you invoke a.out with no args, av[1] is NULL.
>     nonsense code sometime give intended results...
>
You probably misunderstood Thorsten here. 

I think he meant the above program to be used instead of "echo $?", 
i.e.:

shell> ./thorstens_program PX

where PX is a program with exit code >256. 

Wolfgang

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