The command "time" doesn't accept any option arguments
ZIYAD A. M. AL-BATLY
zamb at spymac.com
Sun May 1 04:42:51 UTC 2005
On Sun, 2005-05-01 at 10:15 +0800, Shixin Zeng wrote:
> I tried:
> $time --help
> bash: --help: command not found
>
> real 0m0.052s
> user 0m0.000s
> sys 0m0.001s
> $time -f "%E real,%U user,%S sys" ls -Fs #An example from `man time`
> bash: -f: command not found
>
> real 0m0.001s
> user 0m0.000s
> sys 0m0.001s
>
> Its behavior is completely different from the manual.
> --
> Best regards
>
> Shixin Zeng
Actually, there are two "time" commands and you're mistaken one for the
other. Here:
zamb ~ $ time --help
bash: --help: command not found
real 0m0.005s
user 0m0.000s
sys 0m0.002s
zamb ~ $ type time
time is a shell keyword
zamb ~ $
zamb ~ $ /usr/bin/time --help
Usage: /usr/bin/time [-apvV] [-f format] [-o file] [--append]
[--verbose] [--portability] [--format=format]
[--output=file] [--version] [--quiet] [--help] command
[arg...]
The first version is the BASH built-in, the second is the application
"/usr/bin/time". The man page is for the second one (the application).
To get more info on BASH's built-in "time" see "man bash".
I hope this clarify things for you.
Ziyad.
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