command for swapping of two files or two dirs?

[Peng Yu]

Hi,

I can use mv to program a swap bash script. Or use renameat2(...,
RENAME_EXCHANGE) on Linux and renameatx_np(..., RENAME_SWAP) on Darwin
to make a swap C program.

But since this should be a commonly used function, is there already an
existing well-maintained command for this purpose?

-- 
Regards,
Peng