1 use std::convert::TryFrom;
2 
3 #[test]
test_signalfd()4 fn test_signalfd() {
5     use nix::sys::signalfd::SignalFd;
6     use nix::sys::signal::{self, raise, Signal, SigSet};
7 
8     // Grab the mutex for altering signals so we don't interfere with other tests.
9     let _m = crate::SIGNAL_MTX.lock();
10 
11     // Block the SIGUSR1 signal from automatic processing for this thread
12     let mut mask = SigSet::empty();
13     mask.add(signal::SIGUSR1);
14     mask.thread_block().unwrap();
15 
16     let mut fd = SignalFd::new(&mask).unwrap();
17 
18     // Send a SIGUSR1 signal to the current process. Note that this uses `raise` instead of `kill`
19     // because `kill` with `getpid` isn't correct during multi-threaded execution like during a
20     // cargo test session. Instead use `raise` which does the correct thing by default.
21     raise(signal::SIGUSR1).expect("Error: raise(SIGUSR1) failed");
22 
23     // And now catch that same signal.
24     let res = fd.read_signal().unwrap().unwrap();
25     let signo = Signal::try_from(res.ssi_signo as i32).unwrap();
26     assert_eq!(signo, signal::SIGUSR1);
27 }
28