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vi: Ensure that the edit buffer ends in a newline

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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>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Petja Patjas 2023-04-17 16:28:53 +03:00 • committed by Denys Vlasenko
parent 0af28b84e5
commit 05e5d6a381
1 changed files with 4 additions and 3 deletions
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7
editors/vi.c
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@ -2315,9 +2315,10 @@ static int init_text_buffer(char *fn)
update_filename(fn); update_filename(fn);
rc = file_insert(fn, text, 1); rc = file_insert(fn, text, 1);
if (rc < 0) { if (rc <= 0 || *(end - 1) != '\n') {
// file doesnt exist. Start empty buf with dummy line // file doesn't exist or doesn't end in a newline.
char_insert(text, '\n', NO_UNDO); // insert a newline to the end
char_insert(end, '\n', NO_UNDO);
} }
flush_undo_data(); flush_undo_data();