[Bug libc/20111] struct sockaddr_storage cannot be aggregate-copied

["fweimer at redhat dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=20111

--- Comment #3 from Florian Weimer <fweimer at redhat dot com> ---
(In reply to rguenther from comment #2)
> Making the struct incomplete would do the trick and force heap
> allocation (or allocation via alloca).  But I guess that would break
> too much code out in the wild.

This is totally impractical, the type is part of the ABI.

In general. there is an expectation that you can use struct sockaddr_storage as
some sort of generic socket address.  POSIX also requires that it has a
positive size and sufficient alignment (so that you can store a copy of struct
sockaddr_un in it).  This does not necessarily mean that objects of struct
sockaddr_storage can be copied with an aggregate copy.

POSIX also requires that the ss_family member of struct sockaddr_storage and
the sun_family member of struct sockaddr_un can alias, and there is currently
no way to tell GCC that (there is in standard C, using a declaration of a union
that has both structs as members).

-- 
You are receiving this mail because:
You are on the CC list for the bug.