freopen.patch

iff --git a/mysys/my_fopen.c b/mysys/my_fopen.c
index ede434f..52dedba 100644
--- a/mysys/my_fopen.c
+++ b/mysys/my_fopen.c
@@ -185,6 +185,39 @@ static FILE *my_freebsd_freopen(const char *path, const char *mode, FILE *stream

 #endif

+/**
+  Return a new file stream pointing to the same file
+  but ensure the file descriptor number is orig_fd.
+
+  Workaround for broken freopen() behavior
+  in glibc <= 2.13
+*/
+FILE* preserve_fd(FILE *stream, const int orig_fd)
+{
+  int flags= fcntl(orig_fd,F_GETFL);
+  int fd= fileno(stream);
+  int ret= dup2(fd,orig_fd);
+  if (ret < 0)
+  {
+    my_errno=errno;
+    my_error(EE_CANT_OPEN_STREAM, MYF(ME_BELL+ME_WAITTANG),errno);
+    return NULL;
+  }
+  char type[10];
+  make_ftype(type,flags);
+  FILE* result = fdopen(fd,type);
+  if (result)
+  {
+     fclose(stream);
+     return result;
+  }
+  else
+  {
+     my_errno=errno;
+     my_error(EE_CANT_OPEN_STREAM, MYF(ME_BELL+ME_WAITTANG),errno);
+     return NULL;
+  }
+}

 /**
   Change the file associated with a file stream.
@@ -217,7 +250,11 @@ FILE *my_freopen(const char *path, const char *mode, FILE *stream)
   else
     result= my_freebsd_freopen(path, mode, stream);
 #else
+  int orig_fd = fileno(stream);
   result= freopen(path, mode, stream);
+  if (result && fileno(result) != orig_fd) {
+      result= preserve_fd(result, orig_fd);
+  }
 #endif