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 <keesc...@chromium.org>
Cc: Rasmus Villemoes <li...@rasmusvillemoes.dk>
Cc: Daniel Borkmann <dan...@iogearbox.net>
---
lib/string.c | 24 +++++++++++++++++++++---
1 file changed, 21 insertions(+), 3 deletions(-)
diff --git a/lib/string.c b/lib/string.c
index 0323c0d5629a..091570708db7 100644
--- a/lib/string.c
+++ b/lib/string.c
@@ -635,12 +635,15 @@ EXPORT_SYMBOL(sysfs_streq);
* @s: input string
* @res: result
*
- * This routine returns 0 iff the first character is one of 'Yy1Nn0'.
- * Otherwise it will return -EINVAL. Value pointed to by res is
- * updated upon finding a match.
+ * This routine returns 0 iff the first character is one of 'Yy1Nn0', or
+ * [oO][NnFf] 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 +655,21 @@ 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;
}
--
2.6.3
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