Otherwise, Emacs might do the wrong thing if run in an
he_IL.ISO-8859-8 locale, which an Emacs developer does on occasion.
Problem reported by Eli Zaretskii in:
http://lists.gnu.org/archive/html/emacs-devel/2015-09/msg00966.html
Don't bother with test files, as they aren't copied to the Emacs
source directory. If this problem affects test files in some other
GNU project, we can add coding cookies to the non-ASCII test files
later.
Ultimately, it would be nice to provide a sendmsg and recvmsg module,
and have those provide a replacement struct msghdr and silently
convert msg_accrights into the replacement struct's msg_control, when
targeting older BSD. But until that point in time, this is a nice
cleanup.
SCM_RIGHTS really only works on Unix sockets; however, there is
nothing in passfd.c that needs to be hard-coded to this (rather,
the hard-coding of the address family is done externally when
the socket or socketpair is created).
* m4/afunix.m4 (gl_SOCKET_AFUNIX): Rename...
* m4/passfd.m4 (gl_PASSFD): ...to something more fitting of
its use. Drop test for setting unused HAVE_UNIXSOCKET_SCM_RIGHTS.
Instead of probing at configure for unix_scm_rights_bsd44_way,
instead probe for CMSG_FIRSTHDR at compile time. Simplify BSD 4.3
check to a struct member probe.
* lib/passfd.c (includes): Nothing here requires <sys/un.h>.
(sendfd, recvfd): Update preprocessor checks.
* modules/passfd (Files): Reflect rename, and drop unused file.
(Depends-on): Drop unused dependency.
Signed-off-by: Eric Blake <eblake@redhat.com>
* modules/passfd (Files): Reorder.
(Depends-on): Remove errno.
(Include): Remove <sys/socket.h>, <sys/un.h>.
* lib/passfd.h: Use a GPLv3+ header. Make C++ safe.
* lib/passfd.c: Untabify. Use a GPLv3+ header. Really include the
specification header. Include <sys/socket.h> always. Don't include
<winsock2.h>. Use "#if HAVE_..." instead of "#ifdef HAVE_...".
(sendfd): Clarify that it sets errno when it fails.
(recvfd): Fix specification.
