Cancel linenoise input on signal, I/O error, or close (read 0).

When, while entering a line with linenoise, a signal is received or an
input error is encountered, or the input channel is closed (read(2)
returns 0), the operation is canceled as if the user had pressed C-c.

linenoise-1.0/linenoise.c

@@ -756,7 +756,12 @@ static int linenoiseEdit(int stdin_fd, int stdout_fd, char *buf, size_t buflen,
         char seq[3];
 
         nread = read(l.ifd,&c,1);
-        if (nread <= 0) return l.len;
+        if (nread < 0) {
+            return nread;
+        } else if (nread == 0) {
+            errno = EAGAIN;
+            return -1;
+        }
 
         /* Only autocomplete when the callback is set. It returns < 0 when
          * there was an error reading from fd. Otherwise it will return the