Add the upstream version of a patch submitted by Talor R Campbell in

PR pkg/38988 to fix a problem with socket control message ancillary data
alignment.

Bump PKGREVISION to 1.

1 files changed, 120 insertions, 0 deletions

diff --git a/x11/rxvt-unicode/patches/patch-ad b/x11/rxvt-unicode/patches/patch-ad
new file mode 100644
index 00000000000..8fb20b65da9
--- /dev/null
+++ b/x11/rxvt-unicode/patches/patch-ad
@@ -0,0 +1,120 @@
+$NetBSD: patch-ad,v 1.1 2009/05/19 19:41:19 snj Exp $
+
+--- src/fdpass.C.orig	2008-05-05 09:51:47.000000000 -0700
++++ src/fdpass.C	2009-05-19 12:28:03.000000000 -0700
+@@ -26,6 +26,7 @@
+ #include "../config.h"
+ 
+ #include <cstddef> // needed by broken bsds for NULL used in sys/uio.h
++#include <cstdlib>
+ 
+ #include <sys/types.h>
+ #include <sys/uio.h>
+@@ -33,16 +34,26 @@
+ 
+ #include "libptytty.h"
+ 
+-#ifndef CMSG_LEN // CMSG_SPACE && CMSG_LEN are rfc2292 extensions to unix
++// CMSG_SPACE & CMSG_LEN are rfc2292 extensions to unix
++#ifndef CMSG_SPACE
++# define CMSG_SPACE(len) (sizeof (cmsghdr) + len)
++#endif
++
++#ifndef CMSG_LEN
+ # define CMSG_LEN(len) (sizeof (cmsghdr) + len)
+ #endif
+ 
+ bool
+ ptytty::send_fd (int socket, int fd)
+ {
++  void *buf = malloc (CMSG_SPACE (sizeof (int)));
++
++  if (!buf)
++    return 0;
++
+   msghdr msg;
+   iovec iov;
+-  char buf [CMSG_LEN (sizeof (int))];
++  cmsghdr *cmsg;
+   char data = 0;
+ 
+   iov.iov_base = &data;
+@@ -52,27 +63,33 @@ ptytty::send_fd (int socket, int fd)
+   msg.msg_namelen    = 0;
+   msg.msg_iov        = &iov;
+   msg.msg_iovlen     = 1;
+-  msg.msg_control    = (void *)buf;
+-  msg.msg_controllen = sizeof buf;
++  msg.msg_control    = buf;
++  msg.msg_controllen = CMSG_SPACE (sizeof (int));
+ 
+-  cmsghdr *cmsg = CMSG_FIRSTHDR (&msg);
++  cmsg = CMSG_FIRSTHDR (&msg);
+   cmsg->cmsg_level = SOL_SOCKET;
+   cmsg->cmsg_type  = SCM_RIGHTS;
+   cmsg->cmsg_len   = CMSG_LEN (sizeof (int));
+ 
+   *(int *)CMSG_DATA (cmsg) = fd;
+ 
+-  msg.msg_controllen = cmsg->cmsg_len;
++  ssize_t result = sendmsg (socket, &msg, 0);
++
++  free (buf);
+ 
+-  return sendmsg (socket, &msg, 0) >= 0;
++  return result >= 0;
+ }
+ 
+ int
+ ptytty::recv_fd (int socket)
+ {
++  void *buf = malloc (CMSG_SPACE (sizeof (int)));
++
++  if (!buf)
++    return -1;
++
+   msghdr msg;
+   iovec iov;
+-  char buf [CMSG_LEN (sizeof (int))];  /* ancillary data buffer */
+   char data = 1;
+ 
+   iov.iov_base = &data;
+@@ -83,23 +100,24 @@ ptytty::recv_fd (int socket)
+   msg.msg_iov        = &iov;
+   msg.msg_iovlen     = 1;
+   msg.msg_control    = buf;
+-  msg.msg_controllen = sizeof buf;
++  msg.msg_controllen = CMSG_SPACE (sizeof (int));
+ 
+-  cmsghdr *cmsg = CMSG_FIRSTHDR (&msg);
+-  cmsg->cmsg_level = SOL_SOCKET;
+-  cmsg->cmsg_type  = SCM_RIGHTS;
+-  cmsg->cmsg_len   = CMSG_LEN (sizeof (int));
++  int fd = -1;
+ 
+-  msg.msg_controllen = cmsg->cmsg_len;
++  if (recvmsg (socket, &msg, 0) >  0
++      && data                   == 0
++      && msg.msg_controllen     >= CMSG_SPACE (sizeof (int)))
++    {
++      cmsghdr *cmsg = CMSG_FIRSTHDR (&msg);
+ 
+-  if (recvmsg (socket, &msg, 0) <= 0
+-      || data               != 0
+-      || msg.msg_controllen < CMSG_LEN (sizeof (int))
+-      || cmsg->cmsg_level   != SOL_SOCKET
+-      || cmsg->cmsg_type    != SCM_RIGHTS
+-      || cmsg->cmsg_len     < CMSG_LEN (sizeof (int)))
+-    return -1;
++      if (cmsg->cmsg_level   == SOL_SOCKET
++          && cmsg->cmsg_type == SCM_RIGHTS
++          && cmsg->cmsg_len  >= CMSG_LEN (sizeof (int)))
++        fd = *(int *)CMSG_DATA (cmsg);
++    }
++
++  free (buf);
+ 
+-  return *(int *)CMSG_DATA (cmsg);
++  return fd;
+ }
+