- bsd-user: fix sendmsg(2) emulation w/o ancillary data.

- Bump PORTREVISION.

Submitted by:	sbruno
Obtained from:	https://github.com/seanbruno/qemu-bsd-user/commit/ad92220df37d1ab3120316fcc436071c78817561

2 files changed, 61 insertions, 1 deletions

diff --git a/emulators/qemu-devel/Makefile b/emulators/qemu-devel/Makefile
index 7d982ea00006..352907d166bb 100644
--- a/emulators/qemu-devel/Makefile
+++ b/emulators/qemu-devel/Makefile
@@ -3,7 +3,7 @@
 
 PORTNAME=	qemu
 PORTVERSION=	2.0.2
-PORTREVISION=	3
+PORTREVISION=	4
 CATEGORIES=	emulators
 MASTER_SITES=	http://wiki.qemu.org/download/:release \
 		LOCAL/nox:snapshot
@@ -79,6 +79,7 @@ EXTRA_PATCHES+=	${FILESDIR}/extra-patch-21927cffcc7bcacbb953155f778200846df9f60e
 EXTRA_PATCHES+=	${FILESDIR}/extra-patch-bsd-user-freebsd-os-sys.c
 EXTRA_PATCHES+=	${FILESDIR}/extra-patch-sysctl-hw-physmem
 EXTRA_PATCHES+=	${FILESDIR}/extra-patch-max-arg-pages
+EXTRA_PATCHES+=	${FILESDIR}/extra-patch-ad92220df37d1ab3120316fcc436071c78817561
 .endif
 
 CONFIGURE_ARGS+=	--extra-ldflags=-L${LOCALBASE}/lib
diff --git a/emulators/qemu-devel/files/extra-patch-ad92220df37d1ab3120316fcc436071c78817561 b/emulators/qemu-devel/files/extra-patch-ad92220df37d1ab3120316fcc436071c78817561
new file mode 100644
index 000000000000..c627b9be892b
--- /dev/null
+++ b/emulators/qemu-devel/files/extra-patch-ad92220df37d1ab3120316fcc436071c78817561
@@ -0,0 +1,59 @@
+From ad92220df37d1ab3120316fcc436071c78817561 Mon Sep 17 00:00:00 2001
+From: Sean Bruno <sbruno@chips.ysv.freebsd.org>
+Date: Sat, 4 Oct 2014 20:36:32 +0000
+Subject: [PATCH] Ancillary data in the msghdr struct is optional, not
+ mandatory.
+
+If it doesn't exist, that's ok sendmsg() anyway.  Fixes pkg repo
+issues now that pkg uses sendmsg.
+---
+ bsd-user/freebsd/os-socket.h | 22 +++++++++++++++++-----
+ 1 file changed, 17 insertions(+), 5 deletions(-)
+
+diff --git a/bsd-user/freebsd/os-socket.h b/bsd-user/freebsd/os-socket.h
+index 9339ffb..a5f5ca7 100644
+--- a/bsd-user/freebsd/os-socket.h
++++ b/bsd-user/freebsd/os-socket.h
+@@ -54,9 +54,15 @@ static inline abi_long do_freebsd_sendmsg(int fd, abi_ulong target_msg,
+         msg.msg_name = NULL;
+         msg.msg_namelen = 0;
+     }
+-    msg.msg_controllen = 2 * tswapal(msgp->msg_controllen);
+-    msg.msg_control = alloca(msg.msg_controllen);
+-    msg.msg_flags = tswap32(msgp->msg_flags);
++    if (tswapal(msgp->msg_controllen) > 0) {
++        msg.msg_controllen = 2 * tswapal(msgp->msg_controllen);
++        msg.msg_control = alloca(msg.msg_controllen);
++        msg.msg_flags = tswap32(msgp->msg_flags);
++    } else {
++        msg.msg_controllen = 0;
++        msg.msg_control = NULL;
++        msg.msg_flags = 0;
++    }
+ 
+     count = tswapal(msgp->msg_iovlen);
+     vec = alloca(count * sizeof(struct iovec));
+@@ -65,7 +71,10 @@ static inline abi_long do_freebsd_sendmsg(int fd, abi_ulong target_msg,
+     msg.msg_iovlen = count;
+     msg.msg_iov = vec;
+ 
+-    ret = t2h_freebsd_cmsg(&msg, msgp);
++    if (msg.msg_controllen > 0)
++        ret = t2h_freebsd_cmsg(&msg, msgp);
++    else /* no ancillary data */
++        ret = 0;
+     if (!is_error(ret)) {
+         ret = get_errno(sendmsg(fd, &msg, flags));
+     }
+@@ -116,7 +125,10 @@ static inline abi_long do_freebsd_recvmsg(int fd, abi_ulong target_msg,
+     ret = get_errno(recvmsg(fd, &msg, flags));
+     if (!is_error(ret)) {
+         len = ret;
+-        ret = h2t_freebsd_cmsg(msgp, &msg);
++        if (msg.msg_controllen > 0)
++            ret = h2t_freebsd_cmsg(msgp, &msg);
++        else /* no ancillary data */
++            ret = 0;
+         if (!is_error(ret)) {
+             msgp->msg_namelen = tswap32(msg.msg_namelen);
+             if (msg.msg_name != NULL) {