libreCMC-cmh/package/utils/busybox/patches/402-vi-avoid-touching-a-new-file-with-ZZ-when-no-editing.patch

From 8f3bf4f0d3605b50a8e4c48c89aeabc455f04884 Mon Sep 17 00:00:00 2001
From: Yousong Zhou <yszhou4tech@gmail.com>
Date: Fri, 24 Mar 2017 21:13:10 +0100
Subject: [PATCH 2/2] vi: avoid touching a new file with ZZ when no editing has
 been done

This is the behaviour observed with standard vim and busybox vi of at
least 1.22.1.  It was changed with commit "32afd3a vi: some
simplifications" which happened before 1.23.0.

Mistyping filename on command line happens fairly often and it's better
we restore the old behaviour to avoid a few unnecessary flash writes and
sometimes efforts of debugging bugs caused by those unneeded stray
files.

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
---
 editors/vi.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

--- a/editors/vi.c
+++ b/editors/vi.c
@@ -719,14 +719,6 @@ static int init_text_buffer(char *fn)
 {
 	int rc;
 
-	flush_undo_data();
-	modified_count = 0;
-	last_modified_count = -1;
-#if ENABLE_FEATURE_VI_YANKMARK
-	/* init the marks */
-	memset(mark, 0, sizeof(mark));
-#endif
-
 	/* allocate/reallocate text buffer */
 	free(text);
 	text_size = 10240;
@@ -741,6 +733,14 @@ static int init_text_buffer(char *fn)
 		// file doesnt exist. Start empty buf with dummy line
 		char_insert(text, '\n', NO_UNDO);
 	}
+
+	flush_undo_data();
+	modified_count = 0;
+	last_modified_count = -1;
+#if ENABLE_FEATURE_VI_YANKMARK
+	/* init the marks */
+	memset(mark, 0, sizeof(mark));
+#endif
 	return rc;
 }