[Libguestfs] RFC: copy-attributes command

Hi, attached there is a prototype of patch for adding a new copy-attributes command. Such command would allow copy the attributes of a "file" to another, so for example in guestfish: copy-attributes foo bar permissions:true xattributes:false would only copy the permissions of foo to bar, not copying its extended attributes too. Just few notes: - my first daemon command, so possibly I could be missing something - copy_xattrs is in xattr.c to avoid spreading the usage of xattr API in many places - copy_xattrs does a bit of code repetition with other stuff in xattr.c, but I'm not sure how to avoid it without making the xattr listing code (getxattrs) a bit more complex that what it is already Comments? -- Pino Toscano