C:\t>set DIRCMD=/b

C:\t>dir newfile
File Not Found

C:\t>perl -MFcntl -e "sysopen F, 'newfile', O_EXCL | O_CREAT or die"

C:\t>dir newfile
newfile

C:\t>perl -MFcntl -e "sysopen F, 'newfile', O_EXCL | O_CREAT or die"
Died at -e line 1.