Comments (4)
@birkenfeld Hmm, I'm not sure what's going on. Does cargo run
do anything with signals? Maybe it closes stdin
or something?
from chan-signal.
I think this is basically expected behavior (unfortunately for now). What's happening is that the shell spawns a cargo
process, which then in turn spawns the process for the program you listed above. When you hit ctrl-c the shell actually sends SIGINT to the process group of cargo rather than cargo itself, and this means that both cargo and the child process receive SIGINT. Cargo will then exit immediately (as it doesn't handle this), but the child process will handle it (as you've set it up to do).
The shell, however, will realize that Cargo has exited, and then I believe it will close the stdio pipes set up for that program (notably stdin). I think this happens because the shell owned the Cargo process (e.g. it's managing it after spawning it), so that is the process which basically decides if the subtree "lives or dies".
The two "fixes" for this that I know of are:
- Run the process as the foreground shell (as you've already noted)
- Change cargo to use
exec
so this sort of thing is set up correctly
To me at least this doesn't look like a bug in chan-signal, so hope that helps!
from chan-signal.
@alexcrichton Thanks so much for that detailed analysis! I buy it. :-)
from chan-signal.
Thanks from me as well!
from chan-signal.
Related Issues (14)
- Windows support HOT 6
- Using longer constant names? HOT 4
- doesn't seem to work with `fork()` HOT 7
- API for waiting on any signal HOT 1
- Please export Signal::as_sig
- Documentation offline? HOT 1
- Can't catch Ignored signals HOT 5
- Using chan_signal::notify masks all signals HOT 2
- Drop Trait blocked for variables given to the worker thread HOT 6
- Add SIGWINCH HOT 2
- Allow Setting signals to default handling as well as ignoring them HOT 2
- Alternative APIs HOT 6
- Mac doesn't seem to close properly on any signal HOT 2
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