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Subject[PATCH] lib/string: sysfs_streq works case insensitively
Date
As the name shows, it checks the strings inputed from sysfs.
It should work for both case-sensitive filesystem and
case-insensitive filesystem. Therefore sysfs_streq should work
case-insensitively.

Signed-off-by: Gioh Kim <gi-oh.kim@ionos.com>
---
lib/string.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/lib/string.c b/lib/string.c
index 7548eb715ddb..d0914dffdaae 100644
--- a/lib/string.c
+++ b/lib/string.c
@@ -688,7 +688,8 @@ EXPORT_SYMBOL(strsep);
#endif

/**
- * sysfs_streq - return true if strings are equal, modulo trailing newline
+ * sysfs_streq - return true if strings are equal case-insentively,
+ * modulo trailing newline
* @s1: one string
* @s2: another string
*
@@ -696,10 +697,11 @@ EXPORT_SYMBOL(strsep);
* NUL and newline-then-NUL as equivalent string terminations. It's
* geared for use with sysfs input strings, which generally terminate
* with newlines but are compared against values without newlines.
+ * And case does not matter for the sysfs input strings comparison.
*/
bool sysfs_streq(const char *s1, const char *s2)
{
- while (*s1 && *s1 == *s2) {
+ while (*s1 && tolower(*s1) == tolower(*s2)) {
s1++;
s2++;
}
--
2.25.1
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