1 files changed, 25 insertions, 0 deletions
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 91ad613c70..6066845c5b 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -515,6 +515,31 @@ int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
 EXPORT_SYMBOL(vsnprintf);
 
 /**
+ * vscnprintf - Format a string and place it in a buffer
+ * @buf: The buffer to place the result into
+ * @size: The size of the buffer, including the trailing null space
+ * @fmt: The format string to use
+ * @args: Arguments for the format string
+ *
+ * The return value is the number of characters which have been written into
+ * the @buf not including the trailing '\0'. If @size is <= 0 the function
+ * returns 0.
+ *
+ * Call this function if you are already dealing with a va_list.
+ * You probably want scnprintf() instead.
+ *
+ * See the vsnprintf() documentation for format string extensions over C99.
+ */
+int vscnprintf(char *buf, size_t size, const char *fmt, va_list args)
+{
+	int i;
+
+	i=vsnprintf(buf,size,fmt,args);
+	return (i >= size) ? (size - 1) : i;
+}
+EXPORT_SYMBOL(vscnprintf);
+
+/**
  * vsprintf - Format a string and place it in a buffer
  * @buf: The buffer to place the result into
  * @fmt: The format string to use