Dave,
    Actually, you may wish to use "strtoul(argv[1], NULL, 10)" instead 
of the atoi call, since atoi will silently return MAX_INT if the input 
exceeds the range of a standard integer, and may return negative numbers 
(which would result in very odd sleep times in some cases as the 
negative integer was interpreted as an unsigned value).

==Joseph++

>>>
>>> I think what you're looking for is atoi(char*). (see `man atoi` for
>>> other options).
>>>
>>> The parameter to usleep needs to be an unsigned long.
>>>
>>> Bart
>>    
>>
>
>
>Thank you.  It works now.  I had figured out how to take command line
>arguments, but needed the atoi() function to finish this off.
>
>shell>  vi usleep.c
>
>int main(int argc, char** argv) {
>  if ( argc > 1 )
>    usleep(atoi(argv[1]));
>}
>
>shell>  make usleep
>shell>  cp usleep /usr/local/bin/
>shell>  usleep 250000 # sleep for a quarter second
>
>Now my system has usleep on it!!  Awesome, that was fun.
>
>
>  
>
>
>  
>