qemu serial to stdio not working when invoked from cargo-watch

[dbeckwith]

I'm trying to run the command qemu-system-x86_64 -drive format=raw,file=target/x86_64-snos/debug/bootimage-snos.bin -serial mon:stdio -device isa-debug-exit,iobase=0xf4,iosize=0x04 from cargo-watch. I can run the command just fine on its own from the shell or a script, but trying to invoke the command directly or through a script from cargo-watch causes it to hang and the emulator never launches. If I remove the -serial mon:stdio option, it runs fine, so something about QEMU mapping serial to stdio breaks when run from cargo-watch. Any idea why, or if it's fixable?

[passcod]

I suspect you'll get the same thing, but can you try under watchexec?

[passcod]

This is likely related to watchexec/watchexec#47, which coincidentally got a pull request today! watchexec/watchexec#102

If you can, could you try build that PR and running with watchexec to see if it also fixes your issue?

[dbeckwith]

Interesting, that sounds like it might be it. I'll try it out and let you know.

[dbeckwith]

Yep, that's it. I get the same issue with watchexec on master, but the branch from that PR works fine!

[passcod]

Oh, wonderful. Alright, I'll review that PR tonight and release a new watchexec and cargo-watch then.

[passcod]

Fixed in 7.0.9.