From: "John Levine" <johnl@taugh.com>
To: tuhs@tuhs.org
Subject: [TUHS] Re: Pipes (was Re: After 50 years, what has the Impact of Unix been?)
Date: 5 Dec 2024 21:02:24 -0500 [thread overview]
Message-ID: <20241206020224.E59B3AB6EF07@ary.qy> (raw)
In-Reply-To: <CAEoi9W4WAb9JO8VAPpHH9eB0=-EnJr0MySt_YH_eTUdTERqoUw@mail.gmail.com>
According to Dan Cross <crossd@gmail.com>:
>> > diff <(old-program-version) <(new-program-version)
>> >
>> > to do simple regression testing.
>>
>> And fanout is simply
>>
>> ... | tee >(pipeline1) >(pipeline2)
>
>And indeed these things are pretty nifty, but don't they generate
>trees, and not arbitrary dags? They don't quite capture the full
>generality of Morrison-style networks since it doesn't seem like
>there's a way to connect process substitution fan-out with fan-in; at
>least, not conveniently.
You can use mkfifo to make named pipes and then plumb them as wanted. It's
not particularly beautiful but it's as general as you could want.
That's worked since 4.4BSD which was quite a while ago.
next prev parent reply other threads:[~2024-12-06 2:02 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-12-04 3:17 [TUHS] After 50 years, what has the Impact of Unix been? sjenkin
2024-12-04 13:05 ` [TUHS] " Marc Donner
2024-12-04 13:40 ` William Cheswick
2024-12-04 15:02 ` Rich Salz
2024-12-05 3:08 ` John Levine
2024-12-05 15:19 ` [TUHS] Re: Pipes (was Re: After 50 years, what has the Impact of Unix been?) Dan Cross
2024-12-05 16:00 ` John R Levine
2024-12-05 16:17 ` Heinz Lycklama
2024-12-05 17:06 ` Marc Rochkind
2024-12-05 17:53 ` John Cowan
2024-12-05 18:05 ` John Levine
2024-12-05 17:22 ` Paul Winalski
2024-12-05 18:19 ` Ron Natalie
2024-12-06 2:29 ` Adam Thornton
2024-12-07 20:38 ` Ron Natalie
2024-12-05 16:55 ` Adam Thornton
2024-12-05 17:35 ` Chet Ramey via TUHS
2024-12-05 20:55 ` arnold
2024-12-05 21:12 ` Dan Cross
2024-12-05 21:50 ` Marc Rochkind
2024-12-05 22:03 ` Warner Losh
2024-12-05 22:19 ` Chet Ramey via TUHS
2024-12-05 23:07 ` Marc Rochkind
2024-12-06 8:16 ` Diomidis Spinellis
2024-12-06 0:46 ` Alexis
2024-12-06 21:46 ` Chet Ramey via TUHS
2024-12-05 23:07 ` arnold
2024-12-06 1:09 ` G. Branden Robinson
2024-12-06 1:31 ` Greg A. Woods
2024-12-06 2:05 ` Steve Nickolas
2024-12-06 16:44 ` arnold
2024-12-05 22:05 ` Bakul Shah via TUHS
2024-12-06 2:02 ` John Levine [this message]
2024-12-06 2:21 ` Dan Cross
2024-12-06 16:46 ` arnold
2024-12-06 2:26 Douglas McIlroy
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