On Aug 22, 2006, at 9:55 AM, David Binger wrote:

> On OS X, sys/socket.h has
>
> #define    CMSG_LEN(l)             (ALIGN(sizeof(struct cmsghdr)) +
> (l))
>
> and
>
> #define    CMSG_SPACE(l)           (ALIGN(sizeof(struct cmsghdr)) +
> ALIGN(l))
>
> where i386/param.h has
>
> #define ALIGNBYTES      3
> #define ALIGN(p)        (((unsigned int)(p) + ALIGNBYTES) &~
> ALIGNBYTES)
>
> Should the Solaris 8 versions of CMSG_* also use some kind of ALIGN
> macro?
>

First, thank you David for your response.

Second, after a bit more digging, and looking at how other
open source software packages solved this problem I'm now
using the following patch, which is from the portable version
of OpenSSH  .

As with the previous patch I can't say that this is the
proper fix but initial testing looks OK.

- Jim C. McDonald


--- passfd.c.orig       2006-08-21 14:42:03.000000000 -0400
+++ passfd.c    2006-08-22 14:06:23.000000000 -0400
@@ -21,6 +21,22 @@
#include 
#include 
+#ifndef OSSH_ALIGNBYTES
+#define OSSH_ALIGNBYTES (sizeof(int) - 1)
+#endif
+#ifndef __CMSG_ALIGN
+#define __CMSG_ALIGN(p) (((u_int)(p) + OSSH_ALIGNBYTES) &~
OSSH_ALIGNBYTES)
+#endif
+
+/* Length of the contents of a control message of length len */
+#ifndef CMSG_LEN
+#define CMSG_LEN(len)   (__CMSG_ALIGN(sizeof(struct cmsghdr)) + (len))
+#endif
+
+/* Length of the space taken up by a padded control message of
length len */
+#ifndef CMSG_SPACE
+#define CMSG_SPACE(len) (__CMSG_ALIGN(sizeof(struct cmsghdr)) +
__CMSG_ALIGN(len))
+#endif
static int
recv_fd(int sockfd)