How do I flush a file in Perl?

perl file flush io-buffering
Mihran Hovsepyan picture Mihran Hovsepyan · Dec 27, 2010 · Viewed 63.9k times · Source

I have Perl script which appends a new line to the existing file every 3 seconds. Also, there is a C++ application which reads from that file.

The problem is that the application begins to read the file after the script is done and file handle is closed. To avoid this I want to flush after each line append. How can I do that?

Answer

paxdiablo picture paxdiablo · Dec 27, 2010

Try:

use IO::Handle;
$fh->autoflush;

This was actually posted as a way of auto-flushing in an early question of mine, which asked about the universally accepted bad way of achieving this :-)

Related questions

How to read only the first line of a file

I've been googling for a while, but I cannot find a function the read just first line of a file. I need to read first line of a text file and extract the date from it. new to perl.

Read More
How do I count the characters, words, and lines in a file, using Perl?

What is a good/best way to count the number of characters, words, and lines of a text file using Perl (without using wc)?

Read More
perl script to recursively list all filename in directory

I have written following perl script but problem is its always going in else part and reporting not a file. I do have files in the directory which I am giving in input. What am I doing wrong here? My …

Read More