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ruby18
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lib64
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open3.rb
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# # = open3.rb: Popen, but with stderr, too # # Author:: Yukihiro Matsumoto # Documentation:: Konrad Meyer # # Open3 gives you access to stdin, stdout, and stderr when running other # programs. # # # Open3 grants you access to stdin, stdout, and stderr when running another # program. Example: # # require "open3" # include Open3 # # stdin, stdout, stderr = popen3('nroff -man') # # Open3.popen3 can also take a block which will receive stdin, stdout and # stderr as parameters. This ensures stdin, stdout and stderr are closed # once the block exits. Example: # # require "open3" # # Open3.popen3('nroff -man') { |stdin, stdout, stderr| ... } # module Open3 # # Open stdin, stdout, and stderr streams and start external executable. # Non-block form: # # require 'open3' # # stdin, stdout, stderr = Open3.popen3(cmd) # # Block form: # # require 'open3' # # Open3.popen3(cmd) { |stdin, stdout, stderr| ... } # # The parameter +cmd+ is passed directly to Kernel#exec. # # _popen3_ is like _system_ in that you can pass extra parameters, and the # strings won't be mangled by shell expansion. # # stdin, stdout, stderr = Open3.popen3('identify', '/weird path/with spaces/and "strange" characters.jpg') # result = stdout.read # def popen3(*cmd) pw = IO::pipe # pipe[0] for read, pipe[1] for write pr = IO::pipe pe = IO::pipe pid = fork{ # child fork{ # grandchild pw[1].close STDIN.reopen(pw[0]) pw[0].close pr[0].close STDOUT.reopen(pr[1]) pr[1].close pe[0].close STDERR.reopen(pe[1]) pe[1].close exec(*cmd) } exit!(0) } pw[0].close pr[1].close pe[1].close Process.waitpid(pid) pi = [pw[1], pr[0], pe[0]] pw[1].sync = true if defined? yield begin return yield(*pi) ensure pi.each{|p| p.close unless p.closed?} end end pi end module_function :popen3 end if $0 == __FILE__ a = Open3.popen3("nroff -man") Thread.start do while line = gets a[0].print line end a[0].close end while line = a[1].gets print ":", line end end