mail archive of the barebox mailing list
 help / color / mirror / Atom feed
From: sendpatch@qq.com
To: barebox@lists.infradead.org
Cc: DU HUANPENG <u74147@gmail.com>
Subject: [PATCH] readline: make ctrl-u to work like linux console
Date: Wed, 16 Oct 2019 05:02:49 +0800	[thread overview]
Message-ID: <1571173369-30230-1-git-send-email-sendpatch@qq.com> (raw)

From: DU HUANPENG <u74147@gmail.com>

currtly, the ctrl-u discards the whole line, in most linux
boxes, ctrl-u just remove character before cursor.
this patch make ctrl-u to do this.

Signed-off-by: DU HUANPENG <u74147@gmail.com>
---
 lib/readline.c | 31 +++++++++++++++++++++++++++++--
 1 file changed, 29 insertions(+), 2 deletions(-)

diff --git a/lib/readline.c b/lib/readline.c
index d026af1..eba3da4 100644
--- a/lib/readline.c
+++ b/lib/readline.c
@@ -291,8 +291,35 @@ int readline(const char *prompt, char *buf, int len)
 			break;
 		case BB_KEY_ERASE_LINE:
 		case CTL_CH('u'):
-			BEGINNING_OF_LINE();
-			ERASE_TO_EOL();
+			if(num >= eol_num) {
+				BEGINNING_OF_LINE();
+				ERASE_TO_EOL();
+			} else {
+				for(i=num; i<eol_num; i++) {
+					buf[i-num] = buf[i];
+				}
+				buf[i] = '\0';
+
+				for(i=0; i<num; i++) {
+					putchar(CTL_BACKSPACE);
+				}
+				for(i=0; i<eol_num; i++) {
+					putchar(' ');
+				}
+				for(i=0; i<eol_num; i++) {
+					putchar(CTL_BACKSPACE);
+				}
+
+				eol_num -= num;
+				num = 0;
+
+				for(i=0; i<eol_num; i++) {
+					putchar(buf[i]);
+				}
+				for(i=0; i<eol_num; i++) {
+					putchar(CTL_BACKSPACE);
+				}
+			}
 			break;
 		case DEL:
 		case BB_KEY_DEL7:
-- 
2.7.4




_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox

             reply	other threads:[~2019-10-15 21:03 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-15 21:02 sendpatch [this message]
2019-10-15 21:29 sendpatch
2019-10-15 21:54 sendpatch
2019-10-16  5:29 ` duhuanpeng
2019-10-16  5:34 sendpatch
2019-10-16  5:59 ` Oleksij Rempel

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1571173369-30230-1-git-send-email-sendpatch@qq.com \
    --to=sendpatch@qq.com \
    --cc=barebox@lists.infradead.org \
    --cc=u74147@gmail.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox