Very Computer

My first question is about saving outputs from the timing command
"time" into a file. I tried "time a.out > a.time", but it did not
work. How to capture the outputs into a file?

My second related question is about the meanings of the outputs
from the command "time". I guess "real time" is real time, but what
is "user time"? What is "system time"? Our local man page does not
provide me with a satisfactory answer.

Thanks for your great help!

Quote:>My first question is about saving outputs from the timing command
>"time" into a file. I tried "time a.out > a.time", but it did not
>work. How to capture the outputs into a file?

                        fish
--

NASA/GSFC                         VOX: 301-513-1683                
Hughes/STX Corporation            FAX: 301-513-1608
"somehow seems strange and a little bit funny, to wander thirsty in the rain" pr

|>
|> >My first question is about saving outputs from the timing command
|> >"time" into a file. I tried "time a.out > a.time", but it did not
|> >work. How to capture the outputs into a file?
|> time puts its output on stderr (not noted in any man page i've
|> ever seen either) so:
|> time a.out 2>a.time
|>
|>                   fish
|> --

|> NASA/GSFC                         VOX: 301-513-1683                
|> Hughes/STX Corporation            FAX: 301-513-1608
|> "somehow seems strange and a little bit funny, to wander thirsty in the rain" pr

Almost got it.

"time"  will consider the rest of the line as a whole, so

time a.out 2>a.time

will be interpreted as :  run  "a.out 2>a.time"  and report the
running time of "a.out 2>a.time".

SOLUTION :    (time  a.out) 2>a.time

                                     Gary

Of course, all of this changes if time is a shell builtin, like it
is in csh and tcsh and probably some others. Then time can (and in
the case of csh does) time the redirected command and your answer
would be correct if csh used the 2>a.time syntax for redirection.

--
Dave Eisen                               Sequoia Peripherals: (415) 967-5644

       There's something in my library to offend everybody.
          --- Washington Coalition Against Censorship

Quote:> time a.out 2>a.time

> will be interpreted as :  run  "a.out 2>a.time"  and report the
> running time of "a.out 2>a.time".

Quote:> SOLUTION :    (time  a.out) 2>a.time

>                                      Gary

    time a.out 2> a.time

``Not only is UNIX dead, it's starting to smell really bad.''  -- Rob Pike