statfs: Use statfs64 if arch does not have the statfs syscall

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

include/sys/statfs.h

@@ -30,6 +30,7 @@ __BEGIN_DECLS
 #ifndef __USE_FILE_OFFSET64
 extern int statfs (const char *__file, struct statfs *__buf)
      __THROW __nonnull ((1, 2));
+libc_hidden_proto(statfs)
 #else
 # ifdef __REDIRECT_NTH
 extern int __REDIRECT_NTH (statfs,

libc/sysdeps/linux/common/statfs.c

@@ -13,10 +13,39 @@
 #include <sys/vfs.h>
 
 extern __typeof(statfs) __libc_statfs attribute_hidden;
-#define __NR___libc_statfs __NR_statfs
+
+#if defined __NR_statfs64 && !defined __NR_statfs
+
+int __libc_statfs(const char *path, struct statfs *buf)
+{
+	int err = INLINE_SYSCALL(statfs64, 3, path, sizeof(*buf), buf);
+
+	if (err == 0) {
+		/* Did we overflow? */
+		if (buf->__pad1 || buf->__pad2 || buf->__pad3 ||
+		    buf->__pad4 || buf->__pad5) {
+			__set_errno(EOVERFLOW);
+			return -1;
+		}
+	}
+
+	return err;
+}
+# if defined __UCLIBC_LINUX_SPECIFIC__ || defined __UCLIBC_HAS_THREADS_NATIVE__
+/* statfs is used by NPTL, so it must exported in case */
+weak_alias(__libc_statfs, statfs)
+# endif
+
+/* For systems which have both, prefer the old one */
+#else
+
+# define __NR___libc_statfs __NR_statfs
 _syscall2(int, __libc_statfs, const char *, path, struct statfs *, buf)
 
-#if defined __UCLIBC_LINUX_SPECIFIC__ || defined __UCLIBC_HAS_THREADS_NATIVE__
+# if defined __UCLIBC_LINUX_SPECIFIC__ || defined __UCLIBC_HAS_THREADS_NATIVE__
 /* statfs is used by NPTL, so it must exported in case */
-weak_alias(__libc_statfs,statfs)
+weak_alias(__libc_statfs, statfs)
+# endif
+
 #endif
+libc_hidden_def(statfs)