[Kc] say STDOUT and warn STDERR

Jonathan Otsuka djgoku at gmail.com
Wed Mar 7 11:53:39 PST 2012


I am using getopt::long so I could add another parameter, but sometimes I want to see the data before I save it to a file.

I think I am going to change lines that I want to output to the screen if I redirect STDOUT or not to:

# since STDERR filehandle is already open for us
print STDERR "blah";

Instead of using:

warn "blah";

Jonathan Otsuka

On Mar 7, 2012, at 1:06 PM, Brian Hann <brian.hann at gmail.com> wrote:

> If it's on the command line, you could use GetOpt::Long::Descriptive to set an optional filename argument for both the normal output and report output and then you wouldn't have to worry about wrangling output stream syntax when running the command.
> 
> On Wed, Mar 7, 2012 at 1:02 PM, Jonathan Otsuka <djgoku at gmail.com> wrote:
> I want the user to choose what to do with STDOUT and STDERR on CLI. 
> 
> Jonathan Otsuka
> 
> On Mar 7, 2012, at 12:48 PM, Richard Allen <rsaxvc at gmail.com> wrote:
> 
>> You could pipe stderr in the shell seperatelyfrom stdout, but you can also redirect it in perl
>> 
>> http://www.cs.cmu.edu/afs/cs/usr/rgs/mosaic/pl-exp-io.html
>> 
>> The second codesnippet under open has an example
>> 
>> On Mar 7, 2012 12:41 PM, "Jonathan Otsuka" <djgoku at gmail.com> wrote:
>> I have a program that process/format a file then prints to STDOUT which I may want to save/redirect to a file. I also create a report of the data that was processed, but I don't want the report output sent to STDOUT and was thinking of using warn since its output is to STDERR. Is there another way or is this the best way?
>> 
>> Jonathan Otsuka
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