From: Jonathan Gray <jsg@jsg.id.au>
To: segaloco <segaloco@protonmail.com>
Cc: tuhs@tuhs.org
Subject: [TUHS] Re: Early supported UNIX manual
Date: Sat, 24 Dec 2022 21:30:17 +1100 [thread overview]
Message-ID: <Y6bUua+pIuZoZLmI@largo.jsg.id.au> (raw)
In-Reply-To: <08n94qOTX7MtEldV_R4HpFjZ1ar4em7foXpHnK659iYVp7cv-ewgjx6nywuiRNladfhaeB2vg0U2nyN1DY3KLggUZDQqvuEpTaWQpvHiEOk=@protonmail.com>
On Sat, Dec 24, 2022 at 08:58:06AM +0000, segaloco via TUHS wrote:
> Your reference to sema(2) in CB-UNIX prompted me to go check the source and curiously, that isn't in sysent.c: https://www.tuhs.org/Archive/Distributions/USDL/CB_Unix/SourceCode/cbunix6.pdf (p. 50). However, there is a sys5.c with some semaphore stuff in it. Not how the code gets from the sigcall entry to that file, maybe there's a CB-specific syscall aggregator like the sys3b systemcall for 3B20-specific stuff. It had never actually occurred to me that the semaphores in SVR1 weren't the ones from CB-UNIX, I thought they just forklifted all the IPC into 4.0 from CB. That then means the semaphores that carried through in System V originated at least in UNIX/TS 4.0, but not by way of CB. Minor trivia, but that's news to me. Maybe the sysV modification request logs can shed some light, I remember seeing several IPC mentions in there.
>
> - Matt G.
https://www.tuhs.org/Archive/Distributions/USDL/CB_Unix/cbunix_man2L_01.pdf
describes 'EVENT:O(2L), event - semaphore operations',
event() is system call 63 in cbunix6.pdf sysent
USG UNIX 4.0 and 4.1 IPC were not the same:
https://groups.google.com/g/net.unix/c/-H9x36DMOBQ/m/4mcL76lKbmMJ
next prev parent reply other threads:[~2022-12-24 10:30 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-22 18:52 [TUHS] " Phil Budne
2022-12-22 19:51 ` [TUHS] " segaloco via TUHS
2022-12-22 21:44 ` Phil Budne
2022-12-22 21:55 ` segaloco via TUHS
2022-12-24 3:30 ` Jonathan Gray
2022-12-24 8:58 ` segaloco via TUHS
2022-12-24 10:30 ` Jonathan Gray [this message]
2022-12-23 8:47 ` [TUHS] Re: Book Scanning. (Was: Early supported UNIX manual) Ralph Corderoy
2022-12-23 2:26 [TUHS] Re: Early supported UNIX manual Noel Chiappa
2022-12-23 4:32 ` Phil Budne
2022-12-23 7:52 ` arnold
2022-12-23 9:09 ` Jonathan Gray
2022-12-23 18:04 ` Phil Budne
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