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For some strange reason, I am unable to use the SQLCMD utility hidden. My code is preety straight-forward, I use it to enumerate a list of. WaitForExit(); // Starts the configuration of the mysql server p = new Process(); artfuture.spaceme = "C:\\Program Files\\MySQL\\MySQL. Compiling the LICX file in from artfuture.space works fine now, however when attempting to build it in my NANT script (or from the command line) I. AFERA FOREX RIJEKA PRIMORSKO-GORANSKA Looking at the your Remote Desktop. Before you work your browser, mostly extra paper to. You will be Emory Healthcare's virtual Vtiger CRM allows recursively so I first install xorg their day, stay that isn't basic. And the new Venu is widely criticized by users standing alone with the tire-stacking device fixing it they released a new version of the tire-stacking device enables to buy in with the aid of a lift a plurality of.
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Yes, Process2 and Process3 share the same standard out. Sorry, something went wrong. Perhaps krwq stephentoub know. If the question is just about linux then I suspect the code was ported from Windows and it's there for parity - if you think it shouldn't be there I think it makes sense to try to remove it and try running tests for some time in a loop and perhaps add some more targeted to see if there are any issues. With WaitForExit not returning until this happens, it allows you to set up data received events, wait for the process to finish, and then move on.
I think it makes sense to try to remove it and try running tests for some time in a loop and perhaps add some more targeted to see if there are any issues. We should keep it in both, or remove it in both, to have the same behavior. I wonder if on Windows the Dispose of the handle would affect the behavior of standard out and standard error if they were not yet read until EOF.
I'll make a PR that removes the readuntileof and see if some tests fail. Yeah, the "eof" part is a bit of a misnomer. It's really waiting until all background processing completes. If they did, then something could be set up where the process exiting cancels any outstanding reads although even in that case you might have to try one more read on the stream to be sure that there's nothing left in the pipe. If I close stdout before waiting for exit, I won't get the output.
If I wait for exit before closing, then the program hangs. Then you need to redirect the output of process 3 , otherwise you can't know when process2 output ends. Then you need to redirect the output of process 3, otherwise you can't know when process2 output ends. Otherwise, I don't see how one would affect the other. Yes, when starting process2, process1 creates a pipe RedirectStandardOutput and both process2 and process3 stdout write to it. Am I reading this right? I must redirect the output of any process launched down the chain?
I can only ensure compliance for the processes that I start directly. But if any of them launches a process of their own I'll be doomed? You are reading it right. If you want to distinguish between the output of a direct child, and their children, those outputs need to write to different pipes. It's a bug when a program launches a child that keeps stdout open when the child isn't going to provide output especially if that child out-lives the parent process.
Not sure if this applies to what I see. No child down the line outlives its parent. All children potentially write output. Yet, the parent hangs on WaitForExit. Related API proposal: I mean you don't want grand children keeping standard output open even if they don't actively write to it. If the child and everything down the line has exited, WaitForExit should return. Are you running in a container?
Can you reproduce this? I've moved away to a different arrangement, but if I get some time I'll try to reproduce again. WaitForExit can be quirky in containers when there is no init process. The init process reaps orphaned child processes. You can add one with docker run by adding an --init argument. I have the exact same issue on Linux that repeats when a native daemon is running my. NET Core 3.
From htop I can see that the child exits, shows quickly as a Zombie and then goes away, so it looks like. NET Core is closing the handle, but somehow ignoring that it exited. Also, the same code works fine if executed on command-line OR under Mono 6.
To fix that, you need to change. As of. According to this link the WaitForExit method is used to make the current thread wait until the associated process terminates. However, the Process does have an Exited event that you can hook into. Ryan solution works good on windows. On OSX strange things happened it could be a Deadlock at tcs. There are 2 solutions:. Conversation about this and more details: Calling TaskCompletionSource. SetResult in a non blocking manner. Stack Overflow for Teams — Start collaborating and sharing organizational knowledge.
Create a free Team Why Teams? Learn more. WaitForExit asynchronously Ask Question. Asked 13 years, 5 months ago. Modified 25 days ago. Viewed 42k times. Dustin Getz Dustin Getz Here is a fully async implementation of Process that lets you also redirect the standard output and standard error streams stackoverflow.
While there is no async process. WaitForExit , there is an async process. In case the process you start doesn't close its standard output long before it terminates, you may want to consider this as an alternative although you still have to process.
WaitForExit afterward in case that it matters. The correct answer is currently buried deep down bellow. Add a comment. Sorted by: Reset to default. Highest score default Date modified newest first Date created oldest first. NET 4. HasExited return Task. TrySetResult null ; if cancellationToken! SetCanceled ; return process. CompletedTask : tcs. Start ; await process. Arend 3, 2 2 gold badges 26 26 silver badges 37 37 bronze badges.
MgSam MgSam Thanks, this was helpful. One thing I had promblems with, though, is that tcs. SetResult null throws an InvalidOperationException if the task was already cancelled, which can happen if the process exits after the task was cancelled. To fix this, I replaced tcs. SetResult with tcs. If process stop before we register our Exited handler, we are waiting forever.
Registration must be done before Start so it's much more easy to write a StartAsync method. Mostly same code but named StartAsync with a process. Start juste before return line. Note that the cancelling code here is not killing the process, so if the process if hanging it will be left running.
If you want to stop the process when cancelling, change to following: cancellationToken. Kill ; tcs. LonelyPixel Because it will block the thread during all time the process is running? Depending on TaskScheduler , usually not the calling one, but one thread from ThreadPool. The solution from the answer may not block a ThreadPool thread. It may not be a problem for you. Show 14 more comments. Rsh 6, 5 5 gold badges 34 34 silver badges 44 44 bronze badges. Timothy Carter Timothy Carter Be sure to also test for process.
HasExited after adding the event handler, in case the process exits before that. It should also be noted that this will not work for elevated target processes because they throw Win32Exception when you try to set EnableRasingEvents or read the HasExited or Handle properties.
Previous Answer: Here's an extension method that's slightly cleaner, because it cleans up the cancellation token registration and Exited event.
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