Hi John, On Wed, Feb 13, 2013 at 07:44:56AM -0600, inode0 wrote: > On Wed, Feb 13, 2013 at 3:12 AM, Suvayu Ali <fatkasuvayu+linux@xxxxxxxxx> wrote: > > On Tue, Feb 12, 2013 at 08:37:27PM -0600, inode0 wrote: > >> > >> Something like this perhaps. > >> > >> $ 2>/dev/null >/dev/tcp/imap.gmail.com/993 && sync-my-email.sh > > > > This works, but I don't think I understand it. Could you please > > explain? > > Bash provides built-in ways to manipulate sockets directly. You can > read the REDIRECTION section of the bash man page to get the basics. > Commonly these are used in conjunction with exec to open a socket, > read and/or write data to the socket, then close the socket. > > In the simple case here we just have bash attempt to open a tcp socket > to imap.gmail.com on port 993 and return whether it was successful or > not. The advantage of doing this is that we don't need to rely on any > external program to perform such a simple test. I know about redirection, but was not aware that I could also open sockets! Thanks a lot for the nice explanation, I'll read up more. I think I'll end up using this solution as it seems the most portable. Cheers, :) -- Suvayu Open source is the future. It sets us free. -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
