With this syntax:

rsync -av --delete '/from/somewhere' '/to/somewhere' < nul
[download]

But Why?


It is useful to know, that I do a redirect of both STDOUT and STDERR on a lo file.
But I don't thing that is related to STDIN:

        $| = 1; # no output buffer
        

        open LOG, ">", LOG_FILE # LOG_FILE settings are in toConfig.pm
            or warn "Can't create LOG FILE: $!";
        close LOG;
            
        open STDERR, ">>",LOG_FILE
            or warn "Can't redirect STDERR: $!";
        open STDOUT, ">>",LOG_FILE
            or warn "Can't redirect STDOUT: $!";
[download]

UPDATE
It seems that all works fine, also without STDIN redirect, if I try to call my Perl program from Windows Scheduled Tasks, with that syntax:

cmd /c "C:\Documents and Settings\saintex\Desktop\saintex-backup\backup.pl" -m alternative

This way is also important to send options to perl file (without 'cmd /c' no options are passed to Perl program).

Thank you all!