Hi,

Am 16.10.19 um 07:34 schrieb sendpatch@qq.com:
> 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.

Cool, didnÄt know i can use ctrl-u like this :)

> 
> Signed-off-by: DU HUANPENG <u74147@gmail.com>
> ---
>  lib/readline.c | 34 +++++++++++++++++++++++++++++++---
>  1 file changed, 31 insertions(+), 3 deletions(-)
> 
> diff --git a/lib/readline.c b/lib/readline.c
> index d026af1..c0b194c 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();
> @@ -291,8 +292,35 @@ 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();

Please use kernel/barebox coding style.
./scripts/checkpatch.pl in barebox repository can help you.


> +			} else {
> +				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:
>