FYI, your code example is not even close to concurrency-safe. If one
instance checks (-f $path) and finds no file, then context switches, and
instance #2 performs the same check, then both instances will try to
create a new file, and you'll probably end up with some weird mangled DB
file.
C
On Tue, 2002-02-26 at 00:33, Nix wrote:
> if ( -f $path ) {
> tie %{$self->{accum}},"AnyDBM_File",$path, O_RDWR, #open rw w/lock
> (oct ($main->{conf}->{auto_whitelist_file_mode}) & 0666)
> or die "Cannot open existing auto_whitelist_path $path: $!\n";
>
> } else {
> tie %{$self->{accum}},"AnyDBM_File",$path, O_RDWR|O_CREAT, #open rw
>w/lock
> (oct ($main->{conf}->{auto_whitelist_file_mode}) & 0666)
> or die "Cannot open auto_whitelist_path $path for creation: $!\n";
> }
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