From: Bruno Haible <bruno@clisp.org>
Date: Sat, 30 Apr 2011 12:05:52 +0000 (+0200)
Subject: passfd: Add comments.
X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=89d109384c64e703e2507b6ada5efc68bf651393;p=pspp

passfd: Add comments.

* lib/passfd.c: Add comments about platforms.
---

diff --git a/ChangeLog b/ChangeLog
index 796a2ba10c..1c39c25664 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2011-04-30  Bruno Haible  <bruno@clisp.org>
+
+	passfd: Add comments.
+	* lib/passfd.c: Add comments about platforms.
+
 2011-04-30  Bruno Haible  <bruno@clisp.org>
 
 	sys_uio: Make <sys/uio.h> self-contained.
diff --git a/lib/passfd.c b/lib/passfd.c
index 86c73760b5..945882045e 100644
--- a/lib/passfd.c
+++ b/lib/passfd.c
@@ -30,6 +30,12 @@
 
 #include "cloexec.h"
 
+/* The code that uses CMSG_FIRSTHDR is enabled on
+   Linux, MacOS X, FreeBSD, OpenBSD, NetBSD, AIX, OSF/1, Cygwin.
+   The code that uses HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS is enabled on
+   HP-UX, IRIX, Solaris.  */
+
+/* MSG_CMSG_CLOEXEC is defined only on Linux, as of 2011.  */
 #ifndef MSG_CMSG_CLOEXEC
 # define MSG_CMSG_CLOEXEC 0
 #endif