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-rw-r--r--support/xunistd.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/support/xunistd.h b/support/xunistd.h
index cdd4e8d92d..f99f362cb4 100644
--- a/support/xunistd.h
+++ b/support/xunistd.h
@@ -64,6 +64,9 @@ void *xmmap (void *addr, size_t length, int prot, int flags, int fd);
 void xmprotect (void *addr, size_t length, int prot);
 void xmunmap (void *addr, size_t length);
 
+ssize_t xcopy_file_range(int fd_in, loff_t *off_in, int fd_out,
+			 loff_t *off_out, size_t len, unsigned int flags);
+
 __END_DECLS
 
 #endif /* SUPPORT_XUNISTD_H */