From 540d80469e6a7dce6baf7214df90e86daffc5175 Mon Sep 17 00:00:00 2001
From: Fan Xin <fan.xin@jp.fujitsu.com>
Date: Mon, 5 Jun 2017 13:26:38 +0900
Subject: [PATCH] aslfiles.c: manipulate fds instead of FILE

Copying what stdout/stderr point to is not portable and fails with
musl because FILE is an undefined struct.

Instead, use lower-level Unix functions to modify the file that stderr
writes into. This works on the platforms that Yocto targets.

Upstream-Status: Inappropriate [embedded specific]

Signed-off-by: Patrick Ohly <patrick.ohly@intel.com>

Rebase on acpica 20170303

Signed-off-by: Fan Xin <fan.xin@jp.fujitsu.com>

---
 source/compiler/aslfiles.c | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/source/compiler/aslfiles.c b/source/compiler/aslfiles.c
index 82865db..cc072dc 100644
--- a/source/compiler/aslfiles.c
+++ b/source/compiler/aslfiles.c
@@ -43,6 +43,11 @@
 
 #include "aslcompiler.h"
 #include "acapps.h"
+#include "dtcompiler.h"
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
 
 #define _COMPONENT          ACPI_COMPILER
         ACPI_MODULE_NAME    ("aslfiles")
@@ -606,6 +611,8 @@ FlOpenMiscOutputFiles (
 
     if (Gbl_DebugFlag)
     {
+	int fd;
+
         Filename = FlGenerateFilename (FilenamePrefix, FILE_SUFFIX_DEBUG);
         if (!Filename)
         {
@@ -617,10 +624,10 @@ FlOpenMiscOutputFiles (
         /* Open the debug file as STDERR, text mode */
 
         Gbl_Files[ASL_FILE_DEBUG_OUTPUT].Filename = Filename;
-        Gbl_Files[ASL_FILE_DEBUG_OUTPUT].Handle =
-            freopen (Filename, "w+t", stderr);
 
-        if (!Gbl_Files[ASL_FILE_DEBUG_OUTPUT].Handle)
+        fd = open(Filename, O_CREAT|O_TRUNC, S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH);
+        if (fd < 0 ||
+            dup2(fd, fileno(stderr)))
         {
             /*
              * A problem with freopen is that on error, we no longer
@@ -634,6 +641,8 @@ FlOpenMiscOutputFiles (
             exit (1);
         }
 
+        Gbl_Files[ASL_FILE_DEBUG_OUTPUT].Handle = stderr;
+
         AslCompilerSignon (ASL_FILE_DEBUG_OUTPUT);
         AslCompilerFileHeader (ASL_FILE_DEBUG_OUTPUT);
     }
