change gets to return \n, to distinguish 0-byte read from empty line

a059f025 · rsc · 07018064 · a059f025
--- a/ulib.c
+++ b/ulib.c
@@ -67,9 +67,9 @@ gets(char *buf, int max)
    cc = read(0, &c, 1);
    if(cc < 1)
      break;
+    buf[i++] = c;
    if(c == '\n' || c == '\r')
      break;
-    buf[i++] = c;
  }
  buf[i] = '\0';
  return buf;