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List: busybox
Subject: Re: [PATCH v2] vi: Ensure that the edit buffer ends in a newline
From: Petja Patjas <pp01415943 () gmail ! com>
Date: 2023-05-31 17:31:44
Message-ID: ZHeEgBApeiEvGE12 () localhost
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On Mon, Apr 17, 2023 at 04:28:53PM +0300, Petja Patjas wrote:
> Currently vi assumes that the edit buffer ends in a newline. This may
> not be the case. For example:
>
> $ printf test > test
> $ vi test
> <press 'o'>
>
> We fix this by inserting a newline to the end during initialization.
>
> Signed-off-by: Petja Patjas <pp01415943@gmail.com>
> ---
>
> The first patch didn't apply, sorry about that. I also took this chance
> to simplify the logic a bit.
>
> editors/vi.c | 7 ++++---
> 1 file changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/editors/vi.c b/editors/vi.c
> index 2645afe87..2947c5c1b 100644
> --- a/editors/vi.c
> +++ b/editors/vi.c
> @@ -2315,9 +2315,10 @@ static int init_text_buffer(char *fn)
>
> update_filename(fn);
> rc = file_insert(fn, text, 1);
> - if (rc < 0) {
> - // file doesnt exist. Start empty buf with dummy line
> - char_insert(text, '\n', NO_UNDO);
> + if (rc <= 0 || *(end - 1) != '\n') {
> + // file doesn't exist or doesn't end in a newline.
> + // insert a newline to the end
> + char_insert(end, '\n', NO_UNDO);
> }
>
> flush_undo_data();
> --
> 2.40.0
>
Any comments on this patch?
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