string: introduce helper to get base file name from given path

There are several places in the kernel that use functionality like basename(3) with the exception: in case of '/foo/bar/' we expect to get an empty string. Let's do it common helper for them. Signed-off-by: Andy Shevchenko <[email protected]> Cc: Jason Baron <[email protected]> Cc: YAMANE Toshiaki <[email protected]> Cc: Greg Kroah-Hartman <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Frederic Weisbecker <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
aosmith · Dec 18, 2012 · b18888a · b18888a
1 parent 0edd807
commit b18888a
Showing 1 changed file with 11 additions and 0 deletions.
diff --git a/include/linux/string.h b/include/linux/string.h
@@ -143,4 +143,15 @@ static inline bool strstarts(const char *str, const char *prefix)
 
 extern size_t memweight(const void *ptr, size_t bytes);
 
+/**
+ * kbasename - return the last part of a pathname.
+ *
+ * @path: path to extract the filename from.
+ */
+static inline const char *kbasename(const char *path)
+{
+	const char *tail = strrchr(path, '/');
+	return tail ? tail + 1 : path;
+}
+
 #endif /* _LINUX_STRING_H_ */