linux-kernel - Re: BUG: nconfig doesn't preserve case in its menu display

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Message-ID: <4C69F7B9.2000103@cn.fujitsu.com>
Date:	Tue, 17 Aug 2010 10:45:13 +0800
From:	Li Zefan <lizf@...fujitsu.com>
To:	Ævar Arnfjörð Bjarmason <avarab@...il.com>
CC:	Linux is full of bugs <linux-kernel@...r.kernel.org>,
	Nir Tzachar <nir.tzachar@...il.com>,
	Michal Marek <mmarek@...e.cz>
Subject: Re: BUG: nconfig doesn't preserve case in its menu display

于 2010年08月17日 05:04, Ævar Arnfjörð Bjarmason 写道:
> When I do "make nconfig" and go to "General Setup" my "Local version -
> append to kernel release" entry appears as:
> 
>     (-avar-akbar) Local version - append to kernel release
> 
> When I use "make menuconfig" it's:
> 
>     (-Avar-Akbar) Local version - append to kernel release
> 
> And my .config agrees:
> 
>     $ ack -n1 CONFIG_LOCALVERSION .config
>     CONFIG_LOCALVERSION="-Avar-Akbar"
> 
> But when I edit the version string in both menuconfig and nconfig it
> retains the correct casing.
> 
> I briefly searched through the nconfig code, but couldn't find
> anything pertinent to the localversion, so this is probably a more
> general issue.

The bug is in make_hot(). Here is the fix:

=======================

From: LiZefan <lizf@...f.localdomain>
Date: Tue, 17 Aug 2010 10:35:36 +0800
Subject: [PATCH] nconfig: remember where to start searcing hot key

make_hot() skips '[...]', '<...>' and '(...)', but forgets to remember
where it starts to find the hot key, and then it makes all the letters
before the hot key lower case.

As a result, it shows:

    (-avar-akbar) Local version - append to kernel release
...
<m> Kernel .config support

When it should be:

    (-Avar-Akbar) Local version - append to kernel release
...
<M> Kernel .config support

Reported-by: Ævar Arnfjörð Bjarmason <avarab@...il.com>
Signed-off-by: Li Zefan <lizf@...fujitsu.com>
---
 scripts/kconfig/nconf.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/scripts/kconfig/nconf.c b/scripts/kconfig/nconf.c
index 2ba71bc..ba5eade 100644
--- a/scripts/kconfig/nconf.c
+++ b/scripts/kconfig/nconf.c
@@ -522,6 +522,7 @@ static int is_hot(int index)
 static int make_hot(char *dest, int len, const char *org, int index)
 {
 	int position = -1;
+	int start;
 	int i;
 	int tmp;
 	int c;
@@ -549,6 +550,7 @@ static int make_hot(char *dest, int len, const char *org, int index)
 	}
 	if (i == org_len)
 		return -1;
+	start = ++i;
 	for (; i < org_len; i++) {
 		if (canbhot(org[i]) && org[i-1] != '<' && org[i-1] != '(') {
 			position = i;
@@ -569,7 +571,7 @@ static int make_hot(char *dest, int len, const char *org, int index)
 	   */
 	/* make org[position] uppercase, and all leading letter small case */
 	strncpy(dest, org, len);
-	for (i = 0; i < position; i++)
+	for (i = start; i < position; i++)
 		dest[i] = tolower(dest[i]);
 	dest[position] = toupper(dest[position]);
 	k_menu_items[index].is_hot = 1;
-- 
1.6.3


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