[PULL,70/76] util/readline: Add C-u shortcut

Commit Message

Philippe Mathieu-Daudé June 18, 2024, 4 p.m. UTC

From: Manos Pitsidianakis <[e-mail]>

Add support for the unix-line-discard readline action, which erases from
the cursor position up to the beginning of the line. The default
binding, C-u, was chosen.

This is useful to quickly erase command input while working on the
monitor interface.

Signed-off-by: Manos Pitsidianakis <[e-mail]>
Reviewed-by: Marc-André Lureau <[e-mail]>
Message-ID: <6772067e1c0[e-mail]>
Signed-off-by: Philippe Mathieu-Daudé <[e-mail]>
---
 util/readline.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

Patch

diff --git a/util/readline.c b/util/readline.c
index 0b627d62ad..0f19674f52 100644
--- a/util/readline.c
+++ b/util/readline.c
@@ -271,6 +271,14 @@  static void readline_hist_add(ReadLineState *rs, const char *cmdline)
     rs->hist_entry = -1;
 }
 
+static void readline_kill_line(ReadLineState *rs)
+{
+    while (rs->cmd_buf_index > 0) {
+        readline_backward_char(rs);
+        readline_delete_char(rs);
+    }
+}
+
 /* completion support */
 
 void readline_add_completion(ReadLineState *rs, const char *str)
@@ -426,6 +434,10 @@  void readline_handle_byte(ReadLineState *rs, int ch)
             /* ^P Prev line in history */
             readline_up_char(rs);
             break;
+        case 21:
+            /* ^U Kill backward from point to the beginning of the line. */
+            readline_kill_line(rs);
+            break;
         case 23:
             /* ^W */
             readline_backword(rs);