support SIGINFO on Darwin

src/restic/progress_unix.go

@@ -1,4 +1,4 @@
-// +build !windows
+// +build !windows,!darwin
 
 package restic
 

src/restic/progress_unix_with_siginfo.go

@@ -0,0 +1,23 @@
+// +build darwin
+
+package restic
+
+import (
+	"os"
+	"os/signal"
+	"syscall"
+
+	"restic/debug"
+)
+
+func init() {
+	c := make(chan os.Signal)
+	signal.Notify(c, syscall.SIGUSR1)
+	signal.Notify(c, syscall.SIGINFO)
+	go func() {
+		for s := range c {
+			debug.Log("Signal received: %v\n", s)
+			forceUpdateProgress <- true
+		}
+	}()
+}