stdin process support about circus HOT 9 CLOSED

maybe we could have a command to send data through stdin to all processes. I am not sure about keeping a stdin PIPE open though, this can be quite complicated because it's process specific.

@benoitc what do you think ?

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we could have an send_input <watchername> <pid> <input> command (and its JSON equivalent), that shouldn't be a problem. People should be aware that they will use another fd at this point. I'm +1 for this.

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I assume it would use subprocess.PIPE and do p.stdin.write(input) on command?

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Probably yes.

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Anyone willing to implement that?

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Is there still interest in this feature? I don't mind taking a stab at it, but if there isn't much interest I'll work on something else. It sounds fun to work on, but I personally don't have a need for it.

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I don't have a use case. @iElectric please feel free to reopen and poke @ionrock if you are still interested

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@ionrock it's a feature that would make circus useful for me (to consider switching to). If you happen to do it, let me know :)

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I would also find this useful. Being able to interact via stdin would help in my test environments. I can change what the process does put listening on stdin. This could be done with signals but is a little more complicated. If this remains off the the feature path I can stick with supervisor which has this ability. I was just looking around at alternatives and circus seems like a really good alternative. I like the "top" like feel.

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