Portability fixes:

- Do not use isfdtype()... rather use fstat(2).
- Define TEMP_FAILURE_RETRY if needed.

--- acpid.h	2014-02-26 01:36:58.788146100 +0100
+++ acpid.h	2014-12-28 06:58:18.252702509 +0100
@@ -39,6 +39,15 @@
 
 #define PACKAGE 		"acpid"
 
+#ifndef TEMP_FAILURE_RETRY
+# define TEMP_FAILURE_RETRY(expression) 		\
+	(__extension__ 					\
+	({ long int __result;				\
+	   do __result = (long int) (expression);	\
+	   while (__result == -1L && errno == EINTR);	\
+		__result; }))
+#endif
+
 /*
  * acpid.c
  */
--- kacpimon/libnetlink.c	2013-02-24 14:20:06.624844873 +0100
+++ kacpimon/libnetlink.c	2014-12-28 06:59:50.283706615 +0100
@@ -24,6 +24,7 @@
 #include <time.h>
 #include <sys/uio.h>
 
+#include "acpid.h"
 #include "libnetlink.h"
 
 void rtnl_close(struct rtnl_handle *rth)
--- libnetlink.c	2012-07-15 00:29:38.168312376 +0200
+++ libnetlink.c	2014-12-28 06:59:17.379705147 +0100
@@ -24,6 +24,7 @@
 #include <time.h>
 #include <sys/uio.h>
 
+#include "acpid.h"
 #include "libnetlink.h"
 
 void rtnl_close(struct rtnl_handle *rth)
--- sock.c	2013-08-15 01:30:44.655673004 +0200
+++ sock.c	2014-12-28 07:11:31.198737890 +0100
@@ -30,6 +30,7 @@
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <errno.h>
 #include <grp.h>
 
@@ -53,7 +54,12 @@ int non_root_clients;
 int
 is_socket(int fd)
 {
-    return (isfdtype(fd, S_IFSOCK) == 1);
+    struct stat st;
+
+    if (fstat(fd, &st) == 0)
+	    return S_ISSOCK(st.st_mode);
+
+    return -1;
 }
 
 /* accept a new client connection */
