Improve rename-file port to macOS

* src/fileio.c (Frename_file): On macOS, renameat_noreplace can
fail with errno == ENOTSUP on file systems where it is not
supported, according to the Apple documentation.

diff --git a/src/fileio.c b/src/fileio.c
index 9f6de5b6ca75a1badafd95743d4e371ef53fbaf0..e557483ac4a238addba40e5a0013a350207f7a0c 100644 (file)
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -2297,7 +2297,7 @@ This is what happens in interactive use with M-x.  */)
       rename_errno = errno;
       switch (rename_errno)
        {
-       case EEXIST: case EINVAL: case ENOSYS:
+       case EEXIST: case EINVAL: case ENOSYS: case ENOTSUP:
          barf_or_query_if_file_exists (newname, rename_errno == EEXIST,
                                        "rename to it",
                                        INTEGERP (ok_if_already_exists),