Re: BASH Redirect (STDOUT & STDERR) Syncing

["Bruno Hertz" <brrhtz@yahoo.de>]

Almut Behrens <almut_behrens@gmx.net> writes:

> On Tue, Apr 12, 2005 at 05:09:35AM +0200, Bruno Hertz wrote:
>> Hal Vaughan <hal@thresholddigital.com> writes:
>> > myprog >capture.txt 2>&1
>> >
>> > And I've noticed that the error output is not in sync with STDOUT.  Is there 
>> > any way, when doing a redirect like this, to synchronize the output, so I can 
>> > tell when (in relation to STDOUT) the error messages were output?
>> 
>> They aren't 'in sync', as you call it, presumably because of the
>> output buffering done in Perl, where one channel, either stdout or
>> stdin, receives significant less output than the other and hence
>> flushes more seldom.
>> 
>> IIRC, there's something like an operation $| or similar, 
>
> excactly.  Just set "$|=1" (autoflush) in your Perl code.

Nice, thanks. It's been some time, so I really wasn't sure any more ...

Regards, Bruno.