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For 2023 (and 2024 ...) - we are now fully retired from IT training.
We have made many, many friends over 25 years of teaching about Python, Tcl, Perl, PHP, Lua, Java, C and C++ - and MySQL, Linux and Solaris/SunOS too. Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own risk.

Lisa and I (Graham) now live in what was our training centre in Melksham - happy to meet with former delegates here - but do check ahead before coming round. We are far from inactive - rather, enjoying the times that we are retired but still healthy enough in mind and body to be active!

I am also active in many other area and still look after a lot of web sites - you can find an index ((here))
Brain Hurts .. Forcing PERL to write to a logfil

Posted by CornishDeity (CornishDeity), 2 November 2006
Hi Graham,

Don't know if you remember me, its Ollie who sat a course perhaps 4 months ago. from

Anyhow, hope your good.

Got a problem, I am writing a continuous loop, which is a monitoring script. Perl writes to a logfile which we need to tail 'live' so to speak. Now I am finding that PERL isn't writing to the logfile immediately, and only when I include a exit in the program.

I'm sure you mentioned that you could get PERL to print to a file in real time with some trick. I can't for the life of me remember.

I'm desperate, please save me!


Posted by admin (Graham Ellis), 3 November 2006
You're looking for "Autoflush" mode ... the $| special variable.

open (FH,">>logfile");
select FH;
select STDOUT;

Then any prints to FH will be flushed rather than buffered.

Posted by CornishDeity (CornishDeity), 3 November 2006
Great thanks Graham. Not only is your course top notch but your there when I need you!!

Hope all is going well in the new venue. I look forward to finding a reason to visitin the new year.



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