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features:pipes [2015/12/29 20:29]
admin
features:pipes [2015/12/29 20:33] (current)
admin [Dating the Creation of Pipes]
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 The idea of connecting an output from one process, via an in-kernel memory buffer, to the input of another process is entirely original to Unix. The idea of connecting an output from one process, via an in-kernel memory buffer, to the input of another process is entirely original to Unix.
  
-Doug McIlroy, in 1964, had proposed that "We should have some ways of connecting programs like garden hose–screw in another segment when it becomes necessary to massage data in another way. This is the way of IO also." (Dennis Ritchie, [[https://​www.bell-labs.com/​usr/​dmr/​www/​mdmpipe.html|Advice from Doug McIlroy]]) +Doug McIlroy, in 1964, had proposed that "We should have some ways of connecting programs like garden hose – screw in another segment when it becomes necessary to massage data in another way. This is the way of IO also." (Dennis Ritchie, [[https://​www.bell-labs.com/​usr/​dmr/​www/​mdmpipe.html|Advice from Doug McIlroy]]). Implicit in this statement is the idea of //filters// to modify and "​massage"​ the data.
 ===== The Evolution of Pipes ===== ===== The Evolution of Pipes =====
  
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 According to the [[:​anecdotes:​pipes|anecdotes]],​ Ken Thompson added pipes to Unix in one day. According to the [[:​anecdotes:​pipes|anecdotes]],​ Ken Thompson added pipes to Unix in one day.
  
-The Second Edition of Unix, dated June 1972, didn't have pipes. By January 15, 1973, Unix did have pipesDoug McIlroy put out the notice for a [[http://​www.tuhs.org/​Archive/​Documentation/​Papers/​Unix_Users_Talk_Notes_Jan73.pdf|talk which described the state of UNIX]] at that time. Page 4 describes SYS PIPE and its implementation. This is as narrow as we can get on the date when Ken added pipes to the system.+The Second Edition of Unix, dated June 1972, didn't have pipes; by January 15, 1973, Unix did have pipesDoug McIlroy put out the notice for a [[http://​www.tuhs.org/​Archive/​Documentation/​Papers/​Unix_Users_Talk_Notes_Jan73.pdf|talk which described the state of UNIX]] at that time; page 4 describes SYS PIPE and its implementation. This is as narrow as we can get on the date when Ken added pipes to the system.
  
features/pipes.1451381349.txt.gz · Last modified: 2015/12/29 20:29 by admin