libuser: Fix build when secure getenv is not there

Fixes build on musl

(From OE-Core rev: a0739c37bef360b0268267284b86adf3cc140051)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-extended/libuser/libuser/0001-Check-for-issetugid.patch

@@ -0,0 +1,62 @@
+From d0537cb7f2dc5877700ad78dfd191515379d4edc Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Thu, 7 Jan 2016 02:22:51 +0000
+Subject: [PATCH 1/2] Check for issetugid()
+
+If secure version of getenv is not there then we can use
+issetugid() as aid to call getenv()
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+Upstream-Status: Pending
+
+ configure.ac |  1 +
+ lib/config.c | 12 +++++++++++-
+ 2 files changed, 12 insertions(+), 1 deletion(-)
+
+diff --git a/configure.ac b/configure.ac
+index 1ded1a2..ee19e1f 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -125,6 +125,7 @@ AC_TYPE_OFF_T
+ AC_TYPE_SIZE_T
+ 
+ AC_CHECK_FUNCS([__secure_getenv secure_getenv])
++AC_CHECK_FUNCS([issetugid])
+ 
+ # Modify CFLAGS after all tests are run (some of them could fail because
+ # of the -Werror).
+diff --git a/lib/config.c b/lib/config.c
+index 29e7120..30f9daf 100644
+--- a/lib/config.c
++++ b/lib/config.c
+@@ -44,8 +44,10 @@
+ #  define safe_getenv(string) secure_getenv(string)
+ #elif defined(HAVE___SECURE_GETENV)
+ #  define safe_getenv(string) __secure_getenv(string)
++#elif defined(HAVE_ISSETUGID)
++#  define safe_getenv(string) safe_getenv_issetugid(string)
+ #else
+-#  error Neither secure_getenv not __secure_getenv are available
++#  error None of secure_getenv, __secure_getenv, or issetugid is available
+ #endif
+ 
+ struct config_config {
+@@ -59,6 +61,14 @@ struct config_key {
+ 	GList *values;
+ };
+ 
++static const char*
++safe_getenv_issetugid(const char* name)
++{
++	if (issetugid ())
++		return 0;
++	return getenv (name);
++}
++
+ /* Compare two section names */
+ static int
+ compare_section_names(gconstpointer a, gconstpointer b)
+-- 
+2.7.0
+

meta/recipes-extended/libuser/libuser/0002-remove-unused-execinfo.h.patch

@@ -0,0 +1,27 @@
+From 4b2f81f307ffeac12956e5c16e894e5ebb937ea5 Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Thu, 7 Jan 2016 02:26:00 +0000
+Subject: [PATCH 2/2] remove unused execinfo.h
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+Upstream-Status: Pending
+
+ lib/error.c | 1 -
+ 1 file changed, 1 deletion(-)
+
+diff --git a/lib/error.c b/lib/error.c
+index a5ec30a..443e601 100644
+--- a/lib/error.c
++++ b/lib/error.c
+@@ -18,7 +18,6 @@
+ #include <config.h>
+ #include <sys/types.h>
+ #include <errno.h>
+-#include <execinfo.h>
+ #include <libintl.h>
+ #include <stdarg.h>
+ #include <stdlib.h>
+-- 
+2.7.0
+

meta/recipes-extended/libuser/libuser_0.62.bb

@@ -12,7 +12,9 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=5f30f0716dfdd0d91eb439ebec522ec2 \
 SECTION = "base"
 
 SRC_URI = "https://fedorahosted.org/releases/l/i/libuser/libuser-${PV}.tar.xz \
-           "
+           file://0001-Check-for-issetugid.patch \
+           file://0002-remove-unused-execinfo.h.patch \
+          "
 
 SRC_URI[md5sum] = "63e5e5c551e99dc5302b40b80bd6d4f2"
 SRC_URI[sha256sum] = "a58ff4fabb01a25043b142185a33eeea961109dd60d4b40b6a9df4fa3cace20b"