From 92fbe1a0e53ebfc38578ab16d8d0a353550806b3 Mon Sep 17 00:00:00 2001
From: Jeremy Sanders <jeremy@jeremysanders.net>
Date: Sat, 7 Jun 2014 09:20:58 +0200
Subject: Use libattr and libacl to copy permissions if available

---
 configure.ac    |  8 ++++++++
 src/patchelf.cc | 17 +++++++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/configure.ac b/configure.ac
index bdda1a6..8ca9ad4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -6,5 +6,13 @@ AM_INIT_AUTOMAKE([-Wall -Werror dist-bzip2 foreign color-tests parallel-tests])
 AM_PROG_CC_C_O
 AC_PROG_CXX
 
+AC_CHECK_HEADERS([attr/libattr.h attr/error_context.h])
+AC_SEARCH_LIBS(attr_copy_file, attr)
+AC_CHECK_FUNCS([attr_copy_file])
+
+AC_CHECK_HEADERS([sys/acl.h acl/libacl.h])
+AC_SEARCH_LIBS(perm_copy_file, acl)
+AC_CHECK_FUNCS([perm_copy_file])
+
 AC_CONFIG_FILES([Makefile src/Makefile tests/Makefile patchelf.spec])
 AC_OUTPUT
diff --git a/src/patchelf.cc b/src/patchelf.cc
index dcbfd38..731b9ad 100644
--- a/src/patchelf.cc
+++ b/src/patchelf.cc
@@ -17,6 +17,16 @@
 #include <fcntl.h>
 #include <limits.h>
 
+#ifdef HAVE_ATTR_LIBATTR_H
+# include <attr/libattr.h>
+#endif
+#ifdef HAVE_SYS_ACL_H
+# include <sys/acl.h>
+#endif
+#ifdef HAVE_ACL_LIBACL_H
+# include <acl/libacl.h>
+#endif
+
 #include "elf.h"
 
 using namespace std;
@@ -378,7 +388,14 @@ static void writeFile(string fileName, mode_t fileMode)
 
     if (close(fd) != 0) error("close");
 
+#if defined(HAVE_ATTR_COPY_FILE)
+    if (attr_copy_file(fileName.c_str(), fileName2.c_str(), 0, 0) != 0) error("attr_copy_file");
+#endif
+#if defined(HAVE_PERM_COPY_FILE)
+    if (perm_copy_file(fileName.c_str(), fileName2.c_str(), 0) != 0) error("perm_copy_file");
+#else
     if (chmod(fileName2.c_str(), fileMode) != 0) error("chmod");
+#endif
 
     if (rename(fileName2.c_str(), fileName.c_str()) != 0) error("rename");
 }
-- 
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