Fix suspend when running hx within git #1843
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When editing git commit message using helix, when ctrl-z is pressed the terminal will get stuck since helix does not suspend correctly, as helix is currently using tokio with multi-threads, with signal-hook default low_level::emulate_default_handler it only send the SIGSTOP to the current process but tokio uses multi-process so not everything gets suspended and the terminal also gets stuck. Now switched to use libc kill function and send it to pid 0 so that all processes gets suspended correctly.
pickfire
commented
Mar 19, 2022
| // git suspend will not work since only the current process | ||
| // is suspended, so we had to send SIGSTOP signal to the | ||
| // whole process to make sure it is suspended correctly. | ||
| signal::kill(Pid::from_raw(0), Signal::SIGSTOP).unwrap(); |
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@archseer I can change it to libc::kill if you want since nix is an extra new crate now (libc we already need it anyway) but we only use this one line, but using libc directly will need unsafe and might take up several lines.
archseer
reviewed
Mar 19, 2022
| use nix::{ | ||
| sys::signal::{self, Signal}, | ||
| unistd::Pid, | ||
| }; | ||
| self.compositor.save_cursor(); | ||
| self.restore_term().unwrap(); |
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It seems to me that you didn't follow the signal-hook docs: you're supposed to call low_level::raise(SIGSTOP)?;, not emulate_default_handler: https://docs.rs/signal-hook/latest/signal_hook/#a-complex-signal-handling-with-a-background-thread
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Hmm, seems to be the same underlying call though
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Yes, it's the same thing.
|
Should fix this within signal-hook |
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When editing git commit message using helix, when ctrl-z is pressed
the terminal will get stuck since helix does not suspend correctly,
as helix is currently using tokio with multi-threads, with signal-hook
default low_level::emulate_default_handler it only send the SIGSTOP to
the current process but tokio uses multi-process so not everything gets
suspended and the terminal also gets stuck.
Now switched to use libc kill function and send it to pid 0 so that all
processes gets suspended correctly.
Maybe I need to create an issue in signal-hook for this to check why they didn't kill all processes.