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Ctrl+C in R will terminate the child process which is spawned by using "pipe"

William Dunlap 
If you are on a Unix-like machine try using the setsid command to
run your command in a 'session' of its own.  E.g.,

  > z <- pipe("setsid /usr/bin/yes", open="r")
  > length(readLines(z, n=1e6))
  [1] 1000000
  > # hit control-C
  > length(readLines(z, n=1e6))
  [1] 1000000
  > length(readLines(z, n=1e6))
  [1] 1000000
  > close(z)

as opposed to

  > z <- pipe("/usr/bin/yes", open="r")
  > length(readLines(z, n=1e6))
  [1] 1000000
  > # hit control-C
  > length(readLines(z, n=1e6)) # this reads what is left in the stdin buffer
  [1] 34240
  > length(readLines(z, n=1e6))
  [1] 0
  > close(z)

Bill Dunlap
Spotfire, TIBCO Software
wdunlap tibco.com

Thread (3 messages)

Rong lI Li Ctrl+C in R will terminate the child process which is spawned by using "pipe" Jul 2 Simon Urbanek Ctrl+C in R will terminate the child process which is spawned by using "pipe" Jul 2 William Dunlap Ctrl+C in R will terminate the child process which is spawned by using "pipe" Jul 2