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Groups > comp.os.linux.misc > #61025
| Subject | Re: The joy of pipes |
|---|---|
| Newsgroups | comp.os.linux.misc |
| References | (5 earlier) <20241114160907.0000252b@gmail.com> <vh6a9k$33c17$5@dont-email.me> <hzSdnTUBKbG_YKv6nZ2dnZfqnPQAAAAA@earthlink.com> <A7GZO.66$hgYd.23@fx41.iad> <wwvr07bpizm.fsf@LkoBDZeT.terraraq.uk> |
| From | "186282@ud0s4.net" <186283@ud0s4.net> |
| Organization | wokiesux |
| Date | 2024-11-16 23:59 -0500 |
| Message-ID | <JJOdnfSeXoej5aT6nZ2dnZfqnPSdnZ2d@earthlink.com> (permalink) |
On 11/16/24 5:31 AM, Richard Kettlewell wrote: > Louis Krupp <lkrupp@invalid.pssw.com.invalid> writes: >> On 11/15/2024 12:49 AM, 186282@ud0s4.net wrote: >> >> On 11/14/24 9:05 PM, Lawrence D'Oliveiro wrote: >> >> On Thu, 14 Nov 2024 16:09:07 -0800, John Ames wrote: >> >> (I think it was a topic shift to applications of *nix pipes...?) >> >> Oh shelly boy, the pipes, the pipes are calling ... >> >> Pipes are good. >> >> But, really, they're just temp files the parent >> process can access. >> >> Pipes *could* be implemented with temporary disk files, at least to an >> extent, but as far as I can tell, they're not. > > “Temporary files the parent can access” is not a good model for a couple > of reasons: > > * The semantics are different. Bytes read from a regular file are still > there to be read again if you rewind the file; bytes read from a pipe > are gone. Empty/full files behave differently to empty/full pipes. > > * Temporary regular files can already be accessed by other processes by > name, by file descriptor inheritance, or file descriptor passing. Didn't say temp disk files were necessarily SUPERIOR, just that they CAN do most of the stuff pipes are used for and in an easier user/code-friendly fashion. SIZE is almost unlimited too. Anyway, I'd made some TCP/UDP servers but the parent needed to know the status of the children in a little more detail than just a tiny return code - might want to terminate the child if it'd been idle for awhile, might want to know how much bandwidth was being used, might want to pick a good time to do some maint routines, might want to know WHO the connections were from. Pipes were the (relatively) easy 'C'-approved method and did the job very well. So, for most, use pipes. Python and FPC also do pipes. They're INTENDED for inter-process communications after all so generally GO that way. The Bi-Di server was the most fun ... think a "chat" app but with the potential for more than just text - closer to 'remote terminal'/SSH. ALMOST slipped into re-creating an FTP app until I realized where it was going. Too much enthusiasm. Commented-out the remote root system call function :-) Amazing how LITTLE code is required for such things. Even the pre-threaded version (max cap) wasn't huge at all (albeit the hardest to 'hold in yer head' as to how it worked). Base examples in several langs easily found on the net - just build-on as necessary and then party on.
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The joy of octal Chris Ahlstrom <OFeem1987@teleworm.us> - 2024-11-09 09:36 -0500
Re: The joy of octal John Ames <commodorejohn@gmail.com> - 2024-11-11 09:03 -0800
Re: The joy of octal Chris Ahlstrom <OFeem1987@teleworm.us> - 2024-11-11 15:58 -0500
Re: The joy of octal Louis Krupp <lkrupp@invalid.pssw.com.invalid> - 2024-11-12 02:30 -0700
Re: The joy of octal Chris Ahlstrom <OFeem1987@teleworm.us> - 2024-11-12 07:29 -0500
Re: The joy of EBCDIC John Ames <commodorejohn@gmail.com> - 2024-11-12 11:14 -0800
Re: The joy of EBCDIC Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2024-11-12 19:51 +0000
Re: The joy of EBCDIC Chris Ahlstrom <OFeem1987@teleworm.us> - 2024-11-12 16:12 -0500
Re: The joy of EBCDIC candycanearter07 <candycanearter07@candycanearter07.nomail.afraid> - 2024-11-12 22:20 +0000
Re: The joy of EBCDIC Chris Ahlstrom <OFeem1987@teleworm.us> - 2024-11-13 06:59 -0500
Re: The joy of EBCDIC Fritz Wuehler <fritz@spamexpire-202411.rodent.frell.theremailer.net> - 2024-11-14 21:13 +0100
Re: The joy of EBCDIC Clemens Schüller <cs.usenet@mailbox.org> - 2024-11-14 21:20 +0100
Re: The joy of EBCDIC Eli the Bearded <*@eli.users.panix.com> - 2024-11-14 23:55 +0000
Re: The joy of pipes John Ames <commodorejohn@gmail.com> - 2024-11-14 16:09 -0800
Re: The joy of pipes Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-11-15 02:05 +0000
Re: The joy of pipes "186282@ud0s4.net" <186283@ud0s4.net> - 2024-11-15 02:49 -0500
Re: The joy of pipes John Ames <commodorejohn@gmail.com> - 2024-11-15 07:55 -0800
Re: The joy of pipes Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-11-16 00:16 +0000
Re: The joy of pipes Robert Riches <spamtrap42@jacob21819.net> - 2024-11-16 04:33 +0000
Re: The joy of pipes Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-11-16 06:46 +0000
Re: The joy of pipes "186282@ud0s4.net" <186283@ud0s4.net> - 2024-11-16 00:37 -0500
Re: The joy of pipes rbowman <bowman@montana.com> - 2024-11-16 06:16 +0000
Re: The joy of pipes "186282@ud0s4.net" <186283@ud0s4.net> - 2024-11-16 03:03 -0500
Re: The joy of pipes Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2024-11-16 18:14 +0000
Re: The joy of pipes "186282@ud0s4.net" <186283@ud0s4.net> - 2024-11-16 23:38 -0500
Re: The joy of pipes Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2024-11-16 18:14 +0000
Re: The joy of pipes Richard Kettlewell <invalid@invalid.invalid> - 2024-11-16 10:31 +0000
Re: The joy of pipes "186282@ud0s4.net" <186283@ud0s4.net> - 2024-11-16 23:59 -0500
Re: The joy of pipes Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-11-17 05:30 +0000
Re: The joy of pipes "186282@ud0s4.net" <186283@ud0s4.net> - 2024-11-17 01:05 -0500
Re: The joy of pipes Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-11-17 07:59 +0000
Re: The joy of pipes "186282@ud0s4.net" <186283@ud0s4.net> - 2024-11-17 03:27 -0500
Re: The joy of pipes Richard Kettlewell <invalid@invalid.invalid> - 2024-11-17 08:42 +0000
Re: The joy of pipes "186282@ud0s4.net" <186283@ud0s4.net> - 2024-11-17 22:50 -0500
Re: The joy of pipes Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-11-18 06:06 +0000
Re: The joy of pipes "186282@ud0s4.net" <186283@ud0s4.net> - 2024-11-18 01:51 -0500
Re: The joy of pipes Pancho <Pancho.Jones@proton.me> - 2024-11-18 09:20 +0000
Re: The joy of pipes Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-11-18 09:36 +0000
Re: The joy of pipes Pancho <Pancho.Jones@proton.me> - 2024-11-18 11:05 +0000
Re: The joy of pipes The Natural Philosopher <tnp@invalid.invalid> - 2024-11-18 13:45 +0000
Re: The joy of pipes Pancho <Pancho.Jones@proton.me> - 2024-11-18 17:04 +0000
Re: The joy of pipes The Natural Philosopher <tnp@invalid.invalid> - 2024-11-18 17:47 +0000
Re: The joy of pipes rbowman <bowman@montana.com> - 2024-11-18 17:59 +0000
Re: The joy of pipes "186282@ud0s4.net" <186283@ud0s4.net> - 2024-11-18 22:50 -0500
Re: The joy of pipes Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-11-19 04:53 +0000
Re: The joy of pipes The Natural Philosopher <tnp@invalid.invalid> - 2024-11-19 09:19 +0000
Re: The joy of pipes Richard Kettlewell <invalid@invalid.invalid> - 2024-11-19 09:56 +0000
Re: The joy of pipes rbowman <bowman@montana.com> - 2024-11-18 17:54 +0000
Re: The joy of pipes Pancho <Pancho.Jones@proton.me> - 2024-11-19 09:57 +0000
Re: The joy of pipes Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-11-19 21:55 +0000
Re: The joy of pipes "186282@ud0s4.net" <186283@ud0s4.net> - 2024-11-18 22:32 -0500
Re: The joy of pipes Robert Riches <spamtrap42@jacob21819.net> - 2024-11-19 04:50 +0000
Re: The joy of pipes Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-11-19 04:58 +0000
Re: The joy of pipes Eli the Bearded <*@eli.users.panix.com> - 2024-11-15 06:41 +0000
Re: The joy of EBCDIC Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2024-11-15 20:23 +0000
Re: The joy of octal Eli the Bearded <*@eli.users.panix.com> - 2024-11-12 20:09 +0000
Re: The joy of octal Fritz Wuehler <fritz@spamexpire-202411.rodent.frell.theremailer.net> - 2024-11-12 23:45 +0100
Re: The joy of octal "186282@ud0s4.net" <186283@ud0s4.net> - 2024-11-15 02:58 -0500
Re: The joy of octal rbowman <bowman@montana.com> - 2024-11-15 18:28 +0000
Re: The joy of octal Harold Stevens <wookie@aspen.localdomain> - 2024-11-15 14:30 -0600
Re: The joy of octal "186282@ud0s4.net" <186283@ud0s4.net> - 2024-11-16 00:01 -0500
Re: The joy of octal rbowman <bowman@montana.com> - 2024-11-16 05:50 +0000
Re: The joy of octal Andreas Eder <a_eder_muc@web.de> - 2024-11-16 15:14 +0100
Re: The joy of octal The Natural Philosopher <tnp@invalid.invalid> - 2024-11-16 14:38 +0000
Re: The joy of octal "186282@ud0s4.net" <186283@ud0s4.net> - 2024-11-17 00:57 -0500
Re: The joy of octal "186282@ud0s4.net" <186283@ud0s4.net> - 2024-11-15 23:31 -0500
Re: The joy of octal rbowman <bowman@montana.com> - 2024-11-16 05:24 +0000
Re: The joy of octal "186282@ud0s4.net" <186283@ud0s4.net> - 2024-11-16 03:20 -0500
Re: The joy of octal Don_from_AZ <djatechNOSPAM@comcast.net.invalid> - 2024-11-16 09:16 -0700
Re: The joy of octal "186282@ud0s4.net" <186283@ud0s4.net> - 2024-11-17 00:17 -0500
Re: The joy of octal rbowman <bowman@montana.com> - 2024-11-16 18:14 +0000
Re: The joy of octal "186282@ud0s4.net" <186283@ud0s4.net> - 2024-11-17 00:40 -0500
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