Fix handling of SIGINT

Keep track of a new atomic variable: at_prompt, which is set to true
just before blocking on io::stdin.read_line, and set to false just
calling Poem::read. Additionally, for background tasks, there is a new
ps macro called btask, which changes the process group of commands that
are forked into the background, so that they don't receive SIGINT from
the keyboard.

1 files changed, 3 insertions, 2 deletions

diff --git a/src/recite.rs b/src/recite.rs
index bd72b67..1aa1a62 100644
--- a/src/recite.rs
+++ b/src/recite.rs
@@ -1,10 +1,11 @@
 pub mod path;
 mod ps;
-use crate::{ctask, task};
+use crate::{btask, ctask, task};
 use core::fmt;
 use libc::{waitpid, WNOHANG};
 use path::prefresh;
 use std::io::{self, Write};
+use std::os::unix::process::CommandExt;
 use std::path::Path;
 use std::process::{exit, Command, Stdio};
 use std::sync::{Arc, Mutex};
@@ -125,7 +126,7 @@ impl Meter {
         out: &mut String,
         pids: &mut Arc<Mutex<Vec<i32>>>,
     ) -> Result<i32, io::Error> {
-        let child = task!(verse, out);
+        let child = btask!(verse, out);
         println!("[&]  {}", child.id());
 
         pids.lock().unwrap().push(child.id() as i32);