Adds signal handling

main.go

@@ -4,10 +4,12 @@ import (
 	"bufio"
 	"fmt"
 	"os"
+	"os/signal"
 	"path/filepath"
 	"regexp"
 	"strconv"
 	"strings"
+	"syscall"
 	"tildegit.org/sloum/tally/termios"
 )
 
@@ -158,7 +160,31 @@ func IsFunc(val string) bool {
 	}
 }
 
+func handleSignals(c <-chan os.Signal) {
+	for {
+		switch <-c {
+		case syscall.SIGTSTP:
+			termios.Restore()
+			fmt.Print("\033[?25h")
+			_ = syscall.Kill(syscall.Getpid(), syscall.SIGSTOP)
+		case syscall.SIGCONT:
+			termios.SetCharMode()
+			fmt.Print("\033[?25l\033[2J")
+			wb.Draw()
+		case syscall.SIGINT:
+			termios.Restore()
+			fmt.Print("\033[?25h")
+			os.Exit(1)
+		}
+	}
+}
+
 func main() {
+	// watch for signals, send them to be handled
+	c := make(chan os.Signal, 1)
+	signal.Notify(c, syscall.SIGTSTP, syscall.SIGCONT, syscall.SIGINT)
+	go handleSignals(c)
+
 	args := os.Args
 	if len(args) > 1 {
 		path := ExpandedAbsFilepath(args[1])