Creating files safely
  Enter sysopen
  Allows you to list mode explicitly at create time.
  Allows you to use explicit options.
  Options can avoid need for test at all.
  sysopen( FILEHANDLE, $file, O_RDWR | O_CREAT | O_EXCL, 0600 )
      or die;
  Operations such as this are called atomic functions
  No interfering processing can occur on the machine between the time the system call starts and it completes.

Copyright 2003, Bri Hatch of Onsight, Inc.

Presented at SPUG, 2003.

Presentation created using vim and MagicPoint.