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Date: Wed, 9 Dec 2015 13:43:18 -0800
From: Kees Cook <keescook@...omium.org>
To: linux-kernel@...r.kernel.org
Cc: Kees Cook <keescook@...omium.org>,
Rasmus Villemoes <linux@...musvillemoes.dk>,
Daniel Borkmann <daniel@...earbox.net>, Ingo Molnar <mingo@...hat.com>,
Andy Lutomirski <luto@...capital.net>,
"H. Peter Anvin" <hpa@...or.com>,
Michael Ellerman <mpe@...erman.id.au>,
Mathias Krause <minipli@...glemail.com>,
Thomas Gleixner <tglx@...utronix.de>, x86@...nel.org,
Arnd Bergmann <arnd@...db.de>, PaX Team <pageexec@...email.hu>,
Emese Revfy <re.emese@...il.com>, kernel-hardening@...ts.openwall.com,
linux-arch <linux-arch@...r.kernel.org>
Subject: [PATCH v3 2/8] lib: add "on" and "off" to strtobool
Several places in the kernel expect to use "on" and "off" for their
boolean signifiers, so add them to strtobool.
Signed-off-by: Kees Cook <keescook@...omium.org>
Cc: Rasmus Villemoes <linux@...musvillemoes.dk>
Cc: Daniel Borkmann <daniel@...earbox.net>
---
lib/string.c | 21 ++++++++++++++++++++-
1 file changed, 20 insertions(+), 1 deletion(-)
diff --git a/lib/string.c b/lib/string.c
index 0323c0d5629a..d7550432f91c 100644
--- a/lib/string.c
+++ b/lib/string.c
@@ -635,12 +635,16 @@ EXPORT_SYMBOL(sysfs_streq);
* @s: input string
* @res: result
*
- * This routine returns 0 iff the first character is one of 'Yy1Nn0'.
+ * This routine returns 0 iff the first character is one of 'Yy1Nn0', or
+ * 'Oo' when the second character is one of 'fFnN' (for "on" and "off").
* Otherwise it will return -EINVAL. Value pointed to by res is
* updated upon finding a match.
*/
int strtobool(const char *s, bool *res)
{
+ if (!s)
+ return -EINVAL;
+
switch (s[0]) {
case 'y':
case 'Y':
@@ -652,6 +656,21 @@ int strtobool(const char *s, bool *res)
case '0':
*res = false;
break;
+ case 'o':
+ case 'O':
+ switch (s[1]) {
+ case 'n':
+ case 'N':
+ *res = true;
+ break;
+ case 'f':
+ case 'F':
+ *res = false;
+ break;
+ default:
+ return -EINVAL;
+ }
+ break;
default:
return -EINVAL;
}
--
1.9.1
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