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[OT] Re^2: Clarify My doubt on #!/usr/local/bin/perl

by fokat (Deacon)
on Sep 20, 2005 at 14:25 UTC ( #493465=note: print w/replies, xml ) Need Help??


in reply to Re: Clarify My doubt on #!/usr/local/bin/perl
in thread Clarify My doubt on #!/usr/local/bin/perl

Dear monarch

(...)I don't know why it is called bang.. I thought it was an exclamation mark myself(...)

A few years back, email and news were sent from server to server using a protocol (and program) called UUCP (Unix-to-Unix-CoPy). This used phone lines to push packets of text files from machines that for the most part, were "connected" to the network intermitently, a few times a day.

In those days, email addresses had to include the routing information, telling each system how to forward your message. An email address could have been something like ucbarpa!dino!usb!lem (If memory serves well). Each word in the address would be a host/system/site identifier, as known by the corresponding node. The ! would then instruct said node to "bang" or bounce the file to the next system in line.

As you may easily guess, this system was very awkward (sp?) to use. Later it was entirely replaced with SMTP and NNTP for direct transmission of email and Usenet news from server to server, using the Internet as transport.

During that transition, things were complex because provisions had to be made for rewriting the addresses to RFC-822 format (ie user@site) and for combining RFC-822 and UUCP in the same address, to deal with hybrid or incomplete connections (ie usb!lem@dino.conicit.ve). To this respect, Internet is so much simpler now.

Google for UUCP for more information.

Best regards

-lem, but some call me fokat

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[kcott]: marioroy, not much to go on. Searching "slow logging" (by me) produces no results; just "slow" gives a screenful. Perhaps, "Searching large files a block at a time" which had a performance aspect and you had some imput also.
[gnosti]: Hi, Looking for a module that can add HH:MM:SS durations like 1:40, 1:00:24.13 and 12.3? I see on CPAN more modules with absolute dates. TIA
[kcott]: s/imput/input/
[Corion]: DateTime::Duration ? Personally,I convert stuff to seconds using Time::Piece or Time::Local and then add the seconds and then use POSIX::strftime to print them as hours again
[marto]: good morning all, TCIF
[gnosti]: I'm reading from ffmpeg lengths of video clips in H:M:S and needing to add them and format them back to H:M:S for feeding back to ffmpeg
[marioroy]: kcott Thanks
[Corion]: gnosti: I would cheat and use my approach instead of dealing with durations as objects, or a module

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