copy: handle ENOTSUP from copy_file_range()

* src/copy.c (sparse_copy): Ensure we fall back to
a standard copy if copy_file_range() returns ENOTSUP.
This generally is best checked when checking ENOSYS,
but it also seems to be a practical concern on Centos 7,
as a quick search gave https://bugzilla.redhat.com/1840284

diff --git a/src/copy.c b/src/copy.c
index 26ab909fd283b731b5917e449b63ab7a5ecafa06..69ba94b11c7cce0d59024753aa70a7a5ea435b7b 100644 (file)
--- a/src/copy.c
+++ b/src/copy.c
@@ -290,8 +290,9 @@ sparse_copy (int src_fd, int dest_fd, char *buf, size_t buf_size,
           }
         if (n_copied < 0)
           {
-            if (errno == ENOSYS || errno == EINVAL
-                || errno == EBADF || errno == EXDEV || errno == ETXTBSY)
+            if (errno == ENOSYS || is_ENOTSUP (errno)
+                || errno == EINVAL || errno == EBADF
+                || errno == EXDEV || errno == ETXTBSY)
               break;
             if (errno == EINTR)
               n_copied = 0;