Entry

Is there a way to safely achieve multiple simultaneous writes to a file from different instances of a script i.e. different users?

How can I lock a file?

Jun 9th, 2000 06:52
unknown unknown, Per M Knutsen, Simon Cozens

perldoc -q lock:
Found in /usr/local/lib/perl5/5.6.0/pod/perlfaq5.pod
       How can I lock a file?
       Perl's builtin flock() function (see the perlfunc manpage
       for details) will call flock(2) if that exists, fcntl(2)
       if it doesn't (on perl version 5.004 and later), and
       lockf(3) if neither of the two previous system calls
       exists...