From: dds@aueb.gr (Diomidis Spinellis)
Subject: [TUHS] Pipes in the Third Edition Unix
Date: Tue, 3 Jan 2017 22:54:57 +0200 [thread overview]
Message-ID: <d9dd5f1e-f686-c642-5f55-3904946c9489@aueb.gr> (raw)
Peter Salus writes "The other innovation present in the Third Edition
was the pipe" ("A Quarter Century of Unix", p. 50). Yet, in the
corresponding sys/ken/sysent.c, the pipe system call seems to be a stump.
1, &fpe, /* 40 = fpe */
0, &dup, /* 41 = dup */
0, &nosys, /* 42 = pipe */
1, ×, /* 43 = times */
On the other hand, the Fourth Edition manual documents the pipe system
call, the construction of pipelines through the shell, and the use of wc
as a filter (without an input file, as was required in the Second Edition).
Would it therefore be correct to say that pipes were introduced in the
Fourth rather than the Third Edition?
next reply other threads:[~2017-01-03 20:54 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-03 20:54 Diomidis Spinellis [this message]
2017-01-03 21:50 ` Clem Cole
2017-01-03 21:53 ` Warren Toomey
2017-01-03 22:04 ` Warren Toomey
2017-01-03 22:20 ` Paul Ruizendaal
2017-01-05 0:51 ` Dave Horsfall
2017-01-03 22:14 Norman Wilson
2017-01-03 23:52 Noel Chiappa
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