i have this code in a test which works well on macos <div class="highlight highlig

differences between macos and linux about childprocess HOT 3 CLOSED

jjb commented on July 20, 2024

differences between macos and linux

from childprocess.

Comments (3)

eregon commented on July 20, 2024

We would need a reproducer to investigate this.

childprocess has IIRC 0 differences between Linux and macOS, e.g. process.stop is:

childprocess/lib/childprocess/unix/process.rb

Lines 10 to 26 in 127a3d1

 def stop(timeout = 3) 

 assert_started 

 send_term 

 begin 

 return poll_for_exit(timeout) 

 rescue TimeoutError 

 # try next 

 end 

 send_kill 

 wait 

 rescue Errno::ECHILD, Errno::ESRCH 

 # handle race condition where process dies between timeout 

 # and send_kill 

 true 

 end

You could try to do the same using bare Kernel#spawn without ChildProcess, that would most likely have the same result, if so showing it's not an issue of ChildProcess. It could be an issue of Kernel#spawn itself, but unlikely, probably either some difference based on the OS itself, or some bug in mydir/myscript (I'd think more likely).

from childprocess.

eregon commented on July 20, 2024

BTW:

childprocess/lib/childprocess/process_spawn_process.rb

Lines 75 to 80 in 127a3d1

 if @args.size == 1 

 # When given a single String, Process.spawn would think it should use the shell 

 # if there is any special character in it. However, ChildProcess should never 

 # use the shell. So we use the [cmdname, argv0] form to force no shell. 

 arg = @args[0] 

 args = [[arg, arg]]

So ChildProcess should never use a shell around the subprocess.

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jjb commented on July 20, 2024

okay, thanks so much for all for the info. sorry for no reproduction script. i hacked around with it inside a circleCI ssh session and am sure i did everything parallel in both environments. prob won't have time to dig deeper.

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	def stop(timeout = 3)
	assert_started
	send_term

	begin
	return poll_for_exit(timeout)
	rescue TimeoutError
	# try next
	end

	send_kill
	wait
	rescue Errno::ECHILD, Errno::ESRCH
	# handle race condition where process dies between timeout
	# and send_kill
	true
	end

	if @args.size == 1
	# When given a single String, Process.spawn would think it should use the shell
	# if there is any special character in it. However, ChildProcess should never
	# use the shell. So we use the [cmdname, argv0] form to force no shell.
	arg = @args[0]
	args = [[arg, arg]]