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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 http://faq.perl.org .

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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
"sysopen()":

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



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