There is sysopen: 

use Fcntl qw< O_CREAT O_RDWR >;

sysopen my $fh, $filename, O_CREAT()|O_RDWR(), 0666
    or  die "Can't open $filename: $!\n";

[download]

(Note that your code still unconditionally truncates the file each time.)

- tye        

In reply to Re: PerlIO, random write file access and O_CREAT (sysopen) by tye
in thread PerlIO, random write file access and O_CREAT by vsespb

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