45 lines
1.9 KiB
Plaintext
45 lines
1.9 KiB
Plaintext
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From: pcg@aber.ac.uk (Piercarlo Grandi)
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Newsgroups: comp.sources.unix
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Subject: v27i195: team - portable multi-buffered tape streaming utility, Part01/01
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Date: 13 Jan 1994 13:24:40 -0800
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Approved: vixie@gw.home.vix.com
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Message-ID: <1.758496249.28141@gw.home.vix.com>
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Submitted-By: pcg@aber.ac.uk (Piercarlo Grandi)
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Posting-Number: Volume 27, Issue 195
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Archive-Name: team/part01
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There exist a few filters that help tapes streams by buffering IO and
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allowing reads to overlaps with writes under Unix. Most of these filters
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rely on relatively unportable features, for example SYSV like shared
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memory.
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team is a filter that runs essentially unchanged on any Unix version, as
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it relies only on features present in V7. A number of team processes
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(team members) share a common input fd and a common output fd, and they
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take turns at reading from the former and writing to the latter; they
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synchronize by using a ring of pipes between them, where a "read-enable"
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and a "write-enable" token circulate.
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team is not just very portable, but also portable and efficient. It also
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has some bells & whistles, like command line options to specify the
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number of processes in a team, the block size for IO, and the volume
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size of the input or output media. It also optionally reports its
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progress.
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Previous versions of team have been circulating (e.g. via alt.sources)
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for several years; I have not found a bug for a long time, even if
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surely they will exist.
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The team source is GPL'ed, and it comes with no warranty.
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Note: this program was developed entirely by the author in his own
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time, using his own resources, on his machine, in the context of
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his own research activities. In no way has the University of Wales,
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Aberystwyth contributed aided or abetted to this work, for which
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they bear no responsibility whatsoever. I am grateful to UWA for the
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ability to use their systems (as a paying customer) to post this work.
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pcg@aber.ac.uk (Piercarlo Grandi)
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