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From: sendpatch@qq.com
To: barebox@lists.infradead.org
Cc: DU HUANPENG <u74147@gmail.com>
Subject: [PATCH v3] readline: make ctrl-u to work like linux console
Date: Wed, 16 Oct 2019 15:25:05 +0800	[thread overview]
Message-ID: <1571210705-18315-1-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 erase characters before cursor to the
begginning of the line. this patch make ctrl-u to do this.

Signed-off-by: DU HUANPENG <u74147@gmail.com>
---
 lib/readline.c | 26 ++++++++++++++++++++++++--
 1 file changed, 24 insertions(+), 2 deletions(-)

diff --git a/lib/readline.c b/lib/readline.c
index d026af1..3d5fafd 100644
--- a/lib/readline.c
+++ b/lib/readline.c
@@ -188,9 +188,10 @@ int readline(const char *prompt, char *buf, int len)
 	unsigned wlen;
 	int ichar;
 	int insert = 1;
+	int i;
 #ifdef CONFIG_AUTO_COMPLETE
 	char tmp;
-	int reprint, i;
+	int reprint;
 	char *completestr;
 
 	complete_reset();
@@ -290,10 +291,31 @@ int readline(const char *prompt, char *buf, int len)
 			insert = !insert;
 			break;
 		case BB_KEY_ERASE_LINE:
-		case CTL_CH('u'):
 			BEGINNING_OF_LINE();
 			ERASE_TO_EOL();
 			break;
+		case CTL_CH('u'):
+			if (num <= eol_num) {
+				for (i = num; i < eol_num; i++)
+					buf[i-num] = buf[i];
+				buf[i] = '\0';
+
+				for (i = 0; i < num; i++)
+					getcmd_putch(CTL_BACKSPACE);
+				for (i = 0; i < eol_num; i++)
+					getcmd_putch(' ');
+				for (i = 0; i < eol_num; i++)
+					getcmd_putch(CTL_BACKSPACE);
+
+				eol_num -= num;
+				num = 0;
+
+				for (i = 0 ; i < eol_num; i++)
+					getcmd_putch(buf[i]);
+				for (i = 0; i < eol_num; i++)
+					getcmd_putch(CTL_BACKSPACE);
+			}
+			break;
 		case DEL:
 		case BB_KEY_DEL7:
 		case 8:
-- 
2.7.4




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             reply	other threads:[~2019-10-16  7:26 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-16  7:25 sendpatch [this message]
2019-10-16  7:39 ` Oleksij Rempel

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