Velocity Reviews

Velocity Reviews (
-   Perl Misc (
-   -   FAQ 8.43 How do I open a file without blocking? (

PerlFAQ Server 03-17-2011 10:00 AM

FAQ 8.43 How do I open a file without blocking?
This is an excerpt from the latest version perlfaq8.pod, which
comes with the standard Perl distribution. These postings aim to
reduce the number of repeated questions as well as allow the community
to review and update the answers. The latest version of the complete
perlfaq is at .


8.43: How do I open a file without blocking?

If you're lucky enough to be using a system that supports non-blocking
reads (most Unixish systems do), you need only to use the "O_NDELAY" or
"O_NONBLOCK" flag from the "Fcntl" module in conjunction with

use Fcntl;
sysopen(FH, "/foo/somefile", O_WRONLY|O_NDELAY|O_CREAT, 0644)
or die "can't open /foo/somefile: $!":


The perlfaq-workers, a group of volunteers, maintain the perlfaq. They
are not necessarily experts in every domain where Perl might show up,
so please include as much information as possible and relevant in any
corrections. The perlfaq-workers also don't have access to every
operating system or platform, so please include relevant details for
corrections to examples that do not work on particular platforms.
Working code is greatly appreciated.

If you'd like to help maintain the perlfaq, see the details in

All times are GMT. The time now is 05:16 PM.

Powered by vBulletin®. Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO ©2010, Crawlability, Inc.