Re: [Help-bash] set time

[readmax]

On Thursday, September 13, 2012 at 7:42 PM, Bob Proulx <address@hidden> wrote:


> Hello Max,
>
> You have confused us!  Several of us have been wondering what you mean
> when you say "command to shift time".
>
>
> * Do you mean set the system clock?
>
> * Or do you mean calculate the time?
>
> * Or do you mean run some other command which will think it is running
>   at a different time?
>
> For example when I read "shift time" I immediately thought of
> libfaketime which

Sorry for the lack of clarity. I meant the system clock. What `date -s 
...' does, but without specifying the target time but instead specifying
 the (negative or positive) offset interval (i.e., the number of seconds/minutes/hours by which I 
want the clock to be offset).

Alternatively, if bash only provides an "indirect" method (which still involves reading current time, then calculating target time, then setting new time)), I would need a way to read how many (milli)seconds were lost while doing it (on a very slow virtual machine) and then I'll find a way to take that into account by myself.