Perl and File Locking

[Warren Young]

On 9/25/2013 02:24, wynfield@gmail.com wrote:
>
> "Your vendor has not defined Fcntl macro O_EXLOCK,"

O_EXLOCK is a BSD feature, and Cygwin tries to emulate Linux, not BSD.

Minimal testing tells me you can use Cygwin's nonstandard 
F_LCK_MANDATORY feature from Perl.  This script, foo.pl, doesn't die:

     #!/usr/bin/perl
     sysopen my $fh, "foo.pl", 0600, O_RDONLY or die "sysopen: $!\n";
     fcntl $fh, 0x99, 1 or die "fcntl: $!\n";

Whether it actually does what you expect is a different question.

--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple