readline/readline-6.3-input.dif

---
 lib/readline/input.c    |    7 ++++++-
 lib/readline/readline.c |    7 +++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

--- lib/readline/input.c
+++ lib/readline/input.c	2018-11-29 08:29:58.432878428 +0000
@@ -501,6 +501,8 @@ rl_read_key (void)
   return (c);
 }
 
+extern int _rl_read_zero_char_from_tty;
+
 int
 rl_getc (FILE *stream)
 {
@@ -542,7 +544,10 @@ rl_getc (FILE *stream)
       /* If zero characters are returned, then the file that we are
 	 reading from is empty!  Return EOF in that case. */
       if (result == 0)
-	return (EOF);
+	{
+	  _rl_read_zero_char_from_tty = 1;
+	  return (EOF);
+	}
 
 #if defined (__BEOS__)
       if (errno == EINTR)
--- lib/readline/readline.c
+++ lib/readline/readline.c	2018-11-29 08:29:58.432878428 +0000
@@ -525,6 +525,9 @@ _rl_internal_char_cleanup (void)
     _rl_erase_entire_line ();
 }
 
+/* Catch EOF from tty, do not return command line */
+int _rl_read_zero_char_from_tty = 0;
+
 STATIC_CALLBACK int
 #if defined (READLINE_CALLBACKS)
 readline_internal_char (void)
@@ -573,6 +576,10 @@ readline_internal_charloop (void)
       c = rl_read_key ();
       RL_UNSETSTATE(RL_STATE_READCMD);
 
+      /* Return here if terminal is closed */
+      if (c == EOF && _rl_read_zero_char_from_tty)
+	  return (rl_done = 1);
+
       /* look at input.c:rl_getc() for the circumstances under which this will
 	 be returned; punt immediately on read error without converting it to
 	 a newline; assume that rl_read_key has already called the signal