Sponsored Content
Operating Systems Linux Red Hat Make STDERR readable as STDOUT Post 302495571 by austinharris43 on Thursday 10th of February 2011 03:33:47 PM
Old 02-10-2011
Make STDERR readable as STDOUT

Hi all. I am trying to use backticks in Perl to put STDERR into a string. The code is...

Code:
$readkey_test = `perl -MTerm::ReadKey -e 1`;
print $readkey_test;

if ($readkey_test =~ m/[[:print]]/)
{
	print "ReadKey not installed...\n";
}
else
{
	print "ReadKey installed...\n";
}

If it comes up with an error, then it will return "ReadKey not installed", but if it comes up with no output whatsoever, then it will return "ReadKey installed". That's what it's supposed to do anyway...

I've tried putting 2>&1 at the end to turn STDERR into STDOUT but no dice...

Any ideas?
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Redirect stdout and stderr

How can I redirect and append stdout and stderr to a file when using cron? Here is my crontab file: */5 * * * * /dir/php /dir/process_fns.php >>& /dir/dump.txt Cron gives me an 'unexpected character found in line' when trying to add my crontab file. Regards, Zach Curtis POPULUS (8 Replies)
Discussion started by: zcurtis
8 Replies

2. Shell Programming and Scripting

STDOUT and STDERR going to a system log

We are running HP UNIX 11.0, and a patch applied 6 months ago. Ever since the patch, any scripts that run as script_name 1>&2 will write all the output to our /etc/cmcluster/package_name/package_cntl.log which is owned by root (the permission of the log file is -rwxr----- root sys) Does... (1 Reply)
Discussion started by: longyie904
1 Replies

3. Shell Programming and Scripting

precedence of stderr and stdout

#!/usr/bin/perl open(STDOUT, ">>$Textfile") open(STDERR, ">>$Textfile") print "program running\n"; $final = join("+", $initial,$final) #5 close (STDOUT); close (STDERR);Hi all, above is my perl code. Notice i have captured the stdout and stderr to the same textfile. my code is expected to... (1 Reply)
Discussion started by: new2ss
1 Replies

4. Shell Programming and Scripting

redirecting STDOUT & STDERR

In bash, I need to send the STDOUT and STDERR from a command to one file, and then just STDERR to another file. Doing one or the other using redirects is easy, but trying to do both at once is a bit tricky. Anyone have any ideas? (9 Replies)
Discussion started by: jshinaman
9 Replies

5. UNIX for Advanced & Expert Users

combined stdout & stderr

Hello Everyone! I'm trying to combine output for standard output and for possible standard error to the log file. I was trying to use tee command, but it turned out if error occurred error output will be send to the screen only and will not be redirected with tee command to the log file. Anyone... (11 Replies)
Discussion started by: slavam
11 Replies

6. Shell Programming and Scripting

How to redirect stderr and stdout to a file

Hi friends I am facing one problem while redirecting the out of the stderr and stdout to a file let example my problem with a simple example I have a file (say test.sh)in which i run 2 command in the background ps -ef & ls & and now i am run this file and redirect the output to a file... (8 Replies)
Discussion started by: sushantnirwan
8 Replies

7. Shell Programming and Scripting

How to use tee with stdout and stderr?

I have been doing this: make xyz &> xyz.log &; tail -f xyz.log The problem with this is that you never can ge sure when "make xyz" is done. How can I pipe both stderr and stdout into tee so both stderr and stdout are copied both to the display and to the log file? Thanks, Siegfried (3 Replies)
Discussion started by: siegfried
3 Replies

8. Shell Programming and Scripting

stderr/stdout

Can somebody explain to me why the diff output is not going to stderr? Yet when I issue a diff from the command line the return code is -ne 1. I am guessing diff always writes to stdout??? Is there away I can force the difff to write to stderr USING THE CURRENT template. If possible, I... (5 Replies)
Discussion started by: BeefStu
5 Replies

9. Programming

stderr stdout to a log file

I originally wrote my script using the korn shell and had to port it to bash on a another server. My script is working find for backing up but noticed that now after the move, I am not getting any output to my log files. Using Korn shell, this worked for me for some odd reason. This was sending... (2 Replies)
Discussion started by: metallica1973
2 Replies

10. Shell Programming and Scripting

stdout, stderr redirection

Hi all, can someone help me with the next redirection? i want to redirect the stdout+stderr of a command to the same file (this i can do by prog &> file) but in addition i want to redirect only the stderr to a different file. how can i do this please? (in BASH) thanks. (4 Replies)
Discussion started by: eee
4 Replies
App::Cmd::Tester::CaptureExternal(3pm)			User Contributed Perl Documentation		    App::Cmd::Tester::CaptureExternal(3pm)

NAME
App::Cmd::Tester::CaptureExternal - Extends App::Cmd::Tester to capture from external subprograms VERSION
version 0.318 SYNOPSIS
use Test::More tests => 4; use App::Cmd::Tester::CaptureExternal; use YourApp; my $result = test_app(YourApp => [ qw(command --opt value) ]); like($result->stdout, qr/expected output/, 'printed what we expected'); is($result->stderr, '', 'nothing sent to sderr'); ok($result->output, "STDOUT concatenated with STDERR"); DESCRIPTION
App::Cmd::Tester provides a useful scaffold for testing applications, but it is unable to capture output generated from any external subprograms that are invoked from the application. This subclass uses an alternate mechanism for capturing output (Capture::Tiny) that does capture from external programs, with one major limitation. It is not possible to capture externally from both STDOUT and STDERR while also having appropriately interleaved combined output. Therefore, the "output" from this subclass simply concatenates the two. You can still use "output" for testing if there is any output at all or for testing if something appeared in either output stream, but you can't rely on the ordering being correct between lines to STDOUT and lines to STDERR. AUTHOR
Ricardo Signes <rjbs@cpan.org> COPYRIGHT AND LICENSE
This software is copyright (c) 2012 by Ricardo Signes. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself. perl v5.14.2 2012-05-05 App::Cmd::Tester::CaptureExternal(3pm)
All times are GMT -4. The time now is 07:08 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy