Kernel/LibC: Implement {,f}statvfs

userspace/libraries/LibC/sys/statvfs.cpp

@@ -0,0 +1,18 @@
+#include <fcntl.h>
+#include <sys/statvfs.h>
+#include <sys/syscall.h>
+
+static int fstatvfsat(int fildes, const char* path, struct statvfs* buf)
+{
+	return syscall(SYS_FSTATVFSAT, fildes, path, buf);
+}
+
+int fstatvfs(int fildes, struct statvfs* buf)
+{
+	return fstatvfsat(fildes, nullptr, buf);
+}
+
+int statvfs(const char* __restrict path, struct statvfs* __restrict buf)
+{
+	return fstatvfsat(AT_FDCWD, path, buf);
+}