From 86165a8f8faf913059429476adab999e9031640a Mon Sep 17 00:00:00 2001
From: Bruno Haible <bruno@clisp.org>
Date: Fri, 24 Dec 2021 20:51:37 +0100
Subject: passfd: Fix compilation error on IRIX.

* lib/passfd.c (sendfd): On IRIX, ignore CMSG_FIRSTHDR.
(recvfd): Likewise. Produce a fake error ENOTCONN.
---
 lib/passfd.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

(limited to 'lib')

diff --git a/lib/passfd.c b/lib/passfd.c
index 8a3b7bd10b..e22419a3ce 100644
--- a/lib/passfd.c
+++ b/lib/passfd.c
@@ -52,7 +52,7 @@ sendfd (int sock, int fd)
   char byte = 0;
   struct iovec iov;
   struct msghdr msg;
-# ifdef CMSG_FIRSTHDR
+# if defined CMSG_FIRSTHDR && !defined __sgi
   struct cmsghdr *cmsg;
   char buf[CMSG_SPACE (sizeof fd)];
 # endif
@@ -66,7 +66,7 @@ sendfd (int sock, int fd)
   msg.msg_name = NULL;
   msg.msg_namelen = 0;
 
-# ifdef CMSG_FIRSTHDR
+# if defined CMSG_FIRSTHDR && !defined __sgi
   msg.msg_control = buf;
   msg.msg_controllen = sizeof buf;
   cmsg = CMSG_FIRSTHDR (&msg);
@@ -112,7 +112,7 @@ recvfd (int sock, int flags)
   struct msghdr msg;
   int fd = -1;
   ssize_t len;
-# ifdef CMSG_FIRSTHDR
+# if defined CMSG_FIRSTHDR && !defined __sgi
   struct cmsghdr *cmsg;
   char buf[CMSG_SPACE (sizeof fd)];
   int flags_recvmsg = flags & O_CLOEXEC ? MSG_CMSG_CLOEXEC : 0;
@@ -133,7 +133,7 @@ recvfd (int sock, int flags)
   msg.msg_name = NULL;
   msg.msg_namelen = 0;
 
-# ifdef CMSG_FIRSTHDR
+# if defined CMSG_FIRSTHDR && !defined __sgi
   msg.msg_control = buf;
   msg.msg_controllen = sizeof buf;
   cmsg = CMSG_FIRSTHDR (&msg);
@@ -193,6 +193,9 @@ recvfd (int sock, int flags)
           return -1;
         }
     }
+
+  if (fd < 0 && errno == 0)
+    errno = ENOTCONN;
 # else
   errno = ENOSYS;
 # endif
-- 
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