From a3dac1c3cee169e52c7d644dd565235a1cd833e3 Mon Sep 17 00:00:00 2001
From: Brendan Heading <brendanheading@gmail.com>
Date: Wed, 22 Jul 2015 23:10:11 +0100
Subject: [PATCH] support for non-glibc libcs

Added a TEMP_FAILURE_RETRY macro. This is a glibcism provided by
glibc and uclibc, but missing from musl (& possibly other libcs).

Upstream-status: submitted (see https://sourceforge.net/p/acpid2/tickets/7/)
---
 acpi_listen.c         |  2 ++
 acpid.c               |  1 +
 event.c               |  2 ++
 input_layer.c         |  1 +
 kacpimon/libnetlink.h |  2 ++
 libc_compat.h         | 40 ++++++++++++++++++++++++++++++++++++++++
 libnetlink.c          |  2 ++
 netlink.c             |  1 +
 proc.c                |  1 +
 ud_socket.c           |  1 +
 10 files changed, 53 insertions(+)
 create mode 100644 libc_compat.h

diff --git a/acpi_listen.c b/acpi_listen.c
index d0bc175..839e4f9 100644
--- a/acpi_listen.c
+++ b/acpi_listen.c
@@ -39,6 +39,8 @@
 #include "acpid.h"
 #include "ud_socket.h"
 
+#include "libc_compat.h"
+
 static int handle_cmdline(int *argc, char ***argv);
 static char *read_line(int fd);
 
diff --git a/acpid.c b/acpid.c
index 23f1e58..8555c82 100644
--- a/acpid.c
+++ b/acpid.c
@@ -41,6 +41,7 @@
 #include "input_layer.h"
 #include "inotify_handler.h"
 #include "netlink.h"
+#include "libc_compat.h"
 
 static int handle_cmdline(int *argc, char ***argv);
 static void close_fds(void);
diff --git a/event.c b/event.c
index 324078f..3b069a2 100644
--- a/event.c
+++ b/event.c
@@ -39,6 +39,8 @@
 #include "log.h"
 #include "sock.h"
 #include "ud_socket.h"
+#include "libc_compat.h"
+
 #include "event.h"
 /*
  * What is a rule?  It's polymorphic, pretty much.
diff --git a/input_layer.c b/input_layer.c
index 9aa19c6..cbf8085 100644
--- a/input_layer.c
+++ b/input_layer.c
@@ -42,6 +42,7 @@
 #include "log.h"
 #include "connection_list.h"
 #include "event.h"
+#include "libc_compat.h"
 
 #include "input_layer.h"
 
diff --git a/kacpimon/libnetlink.h b/kacpimon/libnetlink.h
index 6185cbc..0c61896 100644
--- a/kacpimon/libnetlink.h
+++ b/kacpimon/libnetlink.h
@@ -7,6 +7,8 @@
 #include <linux/netlink.h>
 #include <linux/rtnetlink.h>
 
+#include "libc_compat.h"
+
 struct rtnl_handle
 {
 	int			fd;
diff --git a/libc_compat.h b/libc_compat.h
new file mode 100644
index 0000000..39f2336
--- /dev/null
+++ b/libc_compat.h
@@ -0,0 +1,40 @@
+/*
+ *  libc_compat.h - implement defs/macros missing from some libcs
+ *
+ *  Copyright (C) 1999-2000 Andrew Henroid
+ *  Copyright (C) 2001 Sun Microsystems
+ *  Portions Copyright (C) 2004 Tim Hockin (thockin@hockin.org)
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef LIBC_COMPAT_H__
+#define LIBC_COMPAT_H__
+
+/* Evaluate EXPRESSION, and repeat as long as it returns -1 with `errno'
+   set to EINTR. This macro is present on glibc/uclibc but may not be in other cases.  */
+
+#ifndef ____GLIBC__
+#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
+#endif /* __GLIBC__ */
+
+#endif /* LIBC_COMPAT_H__ */
diff --git a/libnetlink.c b/libnetlink.c
index e61d417..cc7aedc 100644
--- a/libnetlink.c
+++ b/libnetlink.c
@@ -24,6 +24,8 @@
 #include <time.h>
 #include <sys/uio.h>
 
+#include "libc_compat.h"
+
 #include "libnetlink.h"
 
 void rtnl_close(struct rtnl_handle *rth)
diff --git a/netlink.c b/netlink.c
index c64e878..27e3536 100644
--- a/netlink.c
+++ b/netlink.c
@@ -41,6 +41,7 @@
 #include "libnetlink.h"
 #include "genetlink.h"
 #include "acpi_genetlink.h"
+#include "libc_compat.h"
 
 #include "acpi_ids.h"
 #include "connection_list.h"
diff --git a/proc.c b/proc.c
index 5bb8fa2..f96b913 100644
--- a/proc.c
+++ b/proc.c
@@ -31,6 +31,7 @@
 #include "log.h"
 #include "event.h"
 #include "connection_list.h"
+#include "libc_compat.h"
 
 #include "proc.h"
 
diff --git a/ud_socket.c b/ud_socket.c
index 2790686..1790917 100644
--- a/ud_socket.c
+++ b/ud_socket.c
@@ -21,6 +21,7 @@
 #include "acpid.h"
 #include "log.h"
 #include "ud_socket.h"
+#include "libc_compat.h"
 
 int
 ud_create_socket(const char *name, mode_t socketmode)
-- 
2.4.3