Add SIGUSR1 and SIGUSR2

Allows applications to handle SIGUSR1 and SIGUSR2.

examples/test_usr1.rs

@@ -0,0 +1,12 @@
+#[macro_use]
+extern crate chan;
+extern crate chan_signal;
+
+use chan_signal::{Signal, kill_this};
+
+fn main() {
+ let (s, r) = chan::sync(1);
+ chan_signal::notify_on(&s, Signal::USR1);
+ kill_this(Signal::USR1);
+ assert_eq!(r.recv(), Some(Signal::USR1));
+}

src/lib.rs

@@ -124,7 +124,7 @@ use bit_set::BitSet;
 use chan::Sender;
 use libc::{
  SIGHUP, SIGINT, SIGQUIT, SIGILL, SIGABRT, SIGFPE, SIGKILL,
- SIGSEGV, SIGPIPE, SIGALRM, SIGTERM,
+ SIGSEGV, SIGPIPE, SIGALRM, SIGTERM, SIGUSR1, SIGUSR2,
 };
 use libc::kill;
 use libc::getpid;
@@ -241,6 +241,8 @@ pub enum Signal {
  PIPE,
  ALRM,
  TERM,
+ USR1,
+ USR2,
  #[doc(hidden)]
  __NonExhaustiveMatch,
 }
@@ -259,6 +261,8 @@ impl Signal {
  SIGPIPE => Signal::PIPE,
  SIGALRM => Signal::ALRM,
  SIGTERM => Signal::TERM,
+ SIGUSR1 => Signal::USR1,
+ SIGUSR2 => Signal::USR2,
  sig => panic!("unsupported signal number: {}", sig),
  }
  }
@@ -276,6 +280,8 @@ impl Signal {
  Signal::PIPE => SIGPIPE,
  Signal::ALRM => SIGALRM,
  Signal::TERM => SIGTERM,
+ Signal::USR1 => SIGUSR1,
+ Signal::USR2 => SIGUSR2,
  Signal::__NonExhaustiveMatch => unreachable!(),
  }
  }
@@ -306,6 +312,8 @@ impl SigSet {
  set.add(SIGPIPE).unwrap();
  set.add(SIGALRM).unwrap();
  set.add(SIGTERM).unwrap();
+ set.add(SIGUSR1).unwrap();
+ set.add(SIGUSR2).unwrap();
  set
  }