busybox: vi: backporting patches to fix ZZ and :x command
Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>v19.07.3_mercusys_ac12_duma
Yousong Zhou
7 years ago
parent
313197d707
commit
f3474ca130
@ -0,0 +1,100 @@
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From e88608eae24ae5934034e1ecb6c494fefbf1b9ae Mon Sep 17 00:00:00 2001
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From: Denys Vlasenko <vda.linux@googlemail.com>
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Date: Mon, 13 Mar 2017 20:50:42 +0100
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Subject: [PATCH 1/2] vi: don't touch file with :x when modified_count == 0
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Along with it, there are other changes
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- Check for uppercase X is removed as the expression will be always false and
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:X itself is another totally different command in standard vim
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- The status line will show number of written lines instead of lines requested
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by the colon command. This is also how the standard vim is doing, though
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the difference is that '!' has to be explicitly specified in vim to allow
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partial writes
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Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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---
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editors/vi.c | 43 ++++++++++++++++++++++++++-----------------
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1 file changed, 26 insertions(+), 17 deletions(-)
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--- a/editors/vi.c
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+++ b/editors/vi.c
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@@ -1038,7 +1038,9 @@ static void colon(char *buf)
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|| strncmp(p, "wn", cnt) == 0
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|| (p[0] == 'x' && !p[1])
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) {
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- cnt = file_write(current_filename, text, end - 1);
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+ if (modified_count != 0 || p[0] != 'x') {
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+ cnt = file_write(current_filename, text, end - 1);
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+ }
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if (cnt < 0) {
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if (cnt == -1)
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status_line_bold("Write error: %s", strerror(errno));
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@@ -1049,8 +1051,9 @@ static void colon(char *buf)
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current_filename,
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count_lines(text, end - 1), cnt
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);
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- if (p[0] == 'x' || p[1] == 'q' || p[1] == 'n'
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- || p[0] == 'X' || p[1] == 'Q' || p[1] == 'N'
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+ if (p[0] == 'x'
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+ || p[1] == 'q' || p[1] == 'n'
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+ || p[1] == 'Q' || p[1] == 'N'
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) {
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editing = 0;
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}
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@@ -1480,16 +1483,19 @@ static void colon(char *buf)
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goto ret;
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}
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#endif
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- // how many lines in text[]?
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- li = count_lines(q, r);
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- size = r - q + 1;
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//if (useforce) {
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// if "fn" is not write-able, chmod u+w
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// sprintf(syscmd, "chmod u+w %s", fn);
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// system(syscmd);
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// forced = TRUE;
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//}
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- l = file_write(fn, q, r);
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+ if (modified_count != 0 || cmd[0] != 'x') {
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+ size = r - q + 1;
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+ l = file_write(fn, q, r);
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+ } else {
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+ size = 0;
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+ l = 0;
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+ }
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//if (useforce && forced) {
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// chmod u-w
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// sprintf(syscmd, "chmod u-w %s", fn);
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@@ -1500,17 +1506,20 @@ static void colon(char *buf)
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if (l == -1)
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status_line_bold_errno(fn);
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} else {
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+ // how many lines written
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+ li = count_lines(q, q + l - 1);
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status_line("'%s' %dL, %dC", fn, li, l);
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- if (q == text && r == end - 1 && l == size) {
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- modified_count = 0;
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- last_modified_count = -1;
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- }
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- if ((cmd[0] == 'x' || cmd[1] == 'q' || cmd[1] == 'n'
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- || cmd[0] == 'X' || cmd[1] == 'Q' || cmd[1] == 'N'
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- )
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- && l == size
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- ) {
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- editing = 0;
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+ if (l == size) {
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+ if (q == text && q + l == end) {
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+ modified_count = 0;
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+ last_modified_count = -1;
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+ }
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+ if (cmd[0] == 'x'
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+ || cmd[1] == 'q' || cmd[1] == 'n'
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+ || cmd[1] == 'Q' || cmd[1] == 'N'
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+ ) {
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+ editing = 0;
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+ }
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}
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}
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#if ENABLE_FEATURE_VI_YANKMARK
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@ -0,0 +1,53 @@
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From 8f3bf4f0d3605b50a8e4c48c89aeabc455f04884 Mon Sep 17 00:00:00 2001
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From: Yousong Zhou <yszhou4tech@gmail.com>
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Date: Fri, 24 Mar 2017 21:13:10 +0100
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Subject: [PATCH 2/2] vi: avoid touching a new file with ZZ when no editing has
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been done
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This is the behaviour observed with standard vim and busybox vi of at
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least 1.22.1. It was changed with commit "32afd3a vi: some
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simplifications" which happened before 1.23.0.
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Mistyping filename on command line happens fairly often and it's better
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we restore the old behaviour to avoid a few unnecessary flash writes and
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sometimes efforts of debugging bugs caused by those unneeded stray
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files.
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Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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---
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editors/vi.c | 16 ++++++++--------
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1 file changed, 8 insertions(+), 8 deletions(-)
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--- a/editors/vi.c
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+++ b/editors/vi.c
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@@ -719,14 +719,6 @@ static int init_text_buffer(char *fn)
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{
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int rc;
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- flush_undo_data();
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- modified_count = 0;
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- last_modified_count = -1;
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-#if ENABLE_FEATURE_VI_YANKMARK
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- /* init the marks */
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- memset(mark, 0, sizeof(mark));
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-#endif
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-
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/* allocate/reallocate text buffer */
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free(text);
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text_size = 10240;
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@@ -741,6 +733,14 @@ static int init_text_buffer(char *fn)
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// file doesnt exist. Start empty buf with dummy line
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char_insert(text, '\n', NO_UNDO);
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}
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+
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+ flush_undo_data();
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+ modified_count = 0;
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+ last_modified_count = -1;
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+#if ENABLE_FEATURE_VI_YANKMARK
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+ /* init the marks */
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+ memset(mark, 0, sizeof(mark));
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+#endif
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return rc;
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}
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