monitor: Provide empty command as final history entry (Jan Kiszka)

Provide an empty line as last entry in command line history, just like
bash e.g. does.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6842 c046a42c-6fe2-441c-8c8c-71466251a162

diff --git a/readline.c b/readline.c
index 9c4b68b53dcd5b09020851af0d55ca9e3621e2e8..9c500f1fec3661e3b473af3232ec0fed90e88941 100644 (file)
--- a/readline.c
+++ b/readline.c
@@ -196,12 +196,14 @@ static void readline_up_char(ReadLineState *rs)
 
 static void readline_down_char(ReadLineState *rs)
 {
-    if (rs->hist_entry == READLINE_MAX_CMDS - 1 || rs->hist_entry == -1)
-       return;
-    if (rs->history[++rs->hist_entry] != NULL) {
+    if (rs->hist_entry == -1)
+        return;
+    if (rs->hist_entry < READLINE_MAX_CMDS - 1 &&
+        rs->history[++rs->hist_entry] != NULL) {
        pstrcpy(rs->cmd_buf, sizeof(rs->cmd_buf),
                 rs->history[rs->hist_entry]);
     } else {
+        rs->cmd_buf[0] = 0;
        rs->hist_entry = -1;
     }
     rs->cmd_buf_index = rs->cmd_buf_size = strlen(rs->cmd_buf);