fork() is not implemented in MacRuby, and I don't think it will be implemented anytime in the near future because of conflicts with the CoreFoundation framework and the Garbage Collector (as I understand it). The same is true for Objective-C applications. NSTask is definitely the way to go, but you shouldn't experience a segmentation fault. Looks like a bug. Perhaps try macruby-nightly, and if it isn't fixed, open a ticket? On 3 Nov 2010, at 14:31, Louis-Philippe wrote:
Hi all,
I'm looking around MacRuby to find a way to run a subprocess and monitor it, here is what I tried:
NSTask:
framework "foundation" task = NSTask.launchedTaskWithLaunchPath("/bin/ls", arguments:"-l") p task.isRunning p task.standardOutput
=> Segmentation fault
Open4:
require 'rubygems' require 'popen4' status = POpen4::popen4('irb') { |stdout,stderr,stdin,pid| stdin.puts "a = 1" stdin.puts "a == 1" stdin.close puts "pid: #{pid}" puts "stdout: #{stdout.read.strip}" puts "stderr: #{stderr.read.strip}" } puts "status: #{status.inspect}" puts "exitstatus: #{status.exitstatus}"
=> /Library/Frameworks/MacRuby.framework/Versions/0.7/usr/lib/ruby/Gems/1.9.2/gems/open4-1.0.1/lib/open4.rb:15:in `open4:': fork() function is unimplemented on this machine (NotImplementedError) from /Library/Frameworks/MacRuby.framework/Versions/0.7/usr/lib/ruby/Gems/1.9.2/gems/POpen4-0.1.4/lib/popen4.rb:75:in `popen4:' from /Users/lpperron/Documents/lllaptop/git_repos/Redis/testResque/testOpen4.rb:3:in `<main>'
Open3:
require 'open3' puts "starting..." Open3.popen3('irb') { |stdin,stdout,stderr| stdin.puts "a = 1" stdin.puts "a == 1" stdin.close
puts "stdout: #{stdout.read.strip}" puts "stderr: #{stderr.read.strip}" }
=> starting...
So... NSTask segfaults... Open4 cannot work because of unimplemented 'fork' in MacRuby and Open3 hangs? Anybody has an other solution to launch and monitor a subprocess?
Thanks!
L-P _______________________________________________ MacRuby-devel mailing list MacRuby-devel@lists.macosforge.org http://lists.macosforge.org/mailman/listinfo.cgi/macruby-devel