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PATH: opt / alt / ruby18 / lib64 / ruby / 1.8

#
# = 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

[+] rinda
[+] yaml
[-] rational.rb [edit]
[-] matrix.rb [edit]
[+] rdoc
[-] shell.rb [edit]
[-] ostruct.rb [edit]
[-] eregex.rb [edit]
[-] scanf.rb [edit]
[+] dl
[-] ftools.rb [edit]
[+] runit
[-] gserver.rb [edit]
[-] getoptlong.rb [edit]
[-] thread.rb [edit]
[-] sync.rb [edit]
[-] delegate.rb [edit]
[-] open-uri.rb [edit]
[-] openssl.rb [edit]
[-] debug.rb [edit]
[+] irb
[-] ping.rb [edit]
[-] digest.rb [edit]
[-] Env.rb [edit]
[-] yaml.rb [edit]
[-] sha1.rb [edit]
[-] forwardable.rb [edit]
[-] weakref.rb [edit]
[-] benchmark.rb [edit]
[-] profiler.rb [edit]
[-] uri.rb [edit]
[-] English.rb [edit]
[-] jcode.rb [edit]
[-] timeout.rb [edit]
[+] xsd
[+] bigdecimal
[-] tracer.rb [edit]
[-] resolv.rb [edit]
[+] uri
[-] tsort.rb [edit]
[-] find.rb [edit]
[-] logger.rb [edit]
[-] parsedate.rb [edit]
[-] importenv.rb [edit]
[-] profile.rb [edit]
[-] optparse.rb [edit]
[-] md5.rb [edit]
[-] getopts.rb [edit]
[-] pp.rb [edit]
[+] test
[-] date.rb [edit]
[+] drb
[+] io
[+] webrick
[-] cgi.rb [edit]
[-] pathname.rb [edit]
[+] xmlrpc
[-] mutex_m.rb [edit]
[+] rss
[+] wsdl
[+] racc
[-] complex.rb [edit]
[+] ..
[-] prettyprint.rb [edit]
[-] csv.rb [edit]
[-] kconv.rb [edit]
[-] securerandom.rb [edit]
[-] abbrev.rb [edit]
[-] resolv-replace.rb [edit]
[+] digest
[-] mathn.rb [edit]
[+] rexml
[+] soap
[-] mailread.rb [edit]
[-] e2mmap.rb [edit]
[-] shellwords.rb [edit]
[-] rss.rb [edit]
[-] time.rb [edit]
[+] openssl
[+] date
[-] finalize.rb [edit]
[-] readbytes.rb [edit]
[-] fileutils.rb [edit]
[-] generator.rb [edit]
[+] net
[-] monitor.rb [edit]
[-] tempfile.rb [edit]
[-] parsearg.rb [edit]
[-] cgi-lib.rb [edit]
[-] un.rb [edit]
[-] mkmf.rb [edit]
[-] base64.rb [edit]
[-] thwait.rb [edit]
[-] webrick.rb [edit]
[-] erb.rb [edit]
[-] rubyunit.rb [edit]
[+] shell
[-] expect.rb [edit]
[-] open3.rb [edit]
[+] cgi
[-] tmpdir.rb [edit]
[-] ipaddr.rb [edit]
[-] pstore.rb [edit]
[-] singleton.rb [edit]
[-] set.rb [edit]
[-] observer.rb [edit]
[-] drb.rb [edit]
[-] irb.rb [edit]
[+] x86_64-linux
[-] date2.rb [edit]
[+] optparse