Remove custom errors and fix background forking

Removes the custom errors in src/recite/erro.rs, and replaces them with
std::io::Errors throughout (recite(), incant_, macros).

Fixed a bug with the way forking to the background is handled, where
registering the signal handler in main for all processes would break
couplets (i.e. pipes). Instead, this sets up a new signal handler each
time a process is forked into the background. It uses a Vec<i32> to keep
track of all the background processes.

1 files changed, 11 insertions, 12 deletions

diff --git a/src/main.rs b/src/main.rs
index 44f2726..b87089a 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,5 +1,4 @@
 mod recite;
-use libc::{waitpid, WNOHANG};
 use recite::path::prefresh;
 use recite::Poem;
 use std::io::{self, Write};
@@ -43,6 +42,16 @@ fn repl(path: &Vec<&Path>, prompt: &str) {
             break;
         }
 
+        // Kill zombies
+        // TODO: Remove this (since it was implemented in incant_quiet())
+        // unsafe {
+        //     let mut status = -1;
+        //     let mut pid = waitpid(-1, &mut status, WNOHANG);
+        //     while pid > 0 {
+        //         pid = waitpid(-1, &mut status, WNOHANG);
+        //     }
+        // }
+
         // Trim the input
         let poetry = String::from(poetry.trim());
 
@@ -56,7 +65,7 @@ fn repl(path: &Vec<&Path>, prompt: &str) {
         match poem {
             Some(poem) => match poem.recite(path, &mut bins) {
                 Ok(_) => {}
-                Err(e) => eprintln!("dwvsh: {}", e),
+                Err(e) => eprintln!("dwvsh: {}", e.to_string().to_lowercase()),
             },
             None => {}
         };
@@ -89,16 +98,6 @@ fn main() {
             io::stdout().flush().unwrap();
         })
         .unwrap();
-
-        signal_hook::low_level::register(signal_hook::consts::SIGCHLD, move || {
-            let mut status: i32 = -1;
-            let pid: i32 = waitpid(-1, &mut status, WNOHANG);
-            if pid != -1 {
-                print!("[&]  + done  {}", pid);
-                io::stdout().flush().unwrap();
-            }
-        })
-        .unwrap();
     };
 
     // Begin evaluating commands