3 files changed, 43 insertions, 1 deletions
diff --git a/ChangeLog b/ChangeLog
index 243caf3274..672c7c3675 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,14 @@
+Mon Feb  6 15:34:47 2012  Tanaka Akira  <akr@fsij.org>
+
+	* ruby.c (fill_standard_fds): use fstat() instead of fcntl(F_GETFD)
+	  for MinGW.  reported by Luis Lavena.  [ruby-core:40526] [Bug #5516]
+
+Mon Feb  6 15:34:47 2012  Tanaka Akira  <akr@fsij.org>
+
+	* ruby.c (fill_standard_fds): new function to open closed standard
+	  file descriptors.
+	  (ruby_sysinit): call fill_standard_fds.
+
 Mon Feb  6 15:19:17 2012  KOSAKI Motohiro  <kosaki.motohiro@gmail.com>
 
 	* io.c (rb_io_fsync,rb_io_fdatasync): release GVL during fsync().
diff --git a/ruby.c b/ruby.c
index f2c92fc426..3c97d01ddd 100644
--- a/ruby.c
+++ b/ruby.c
@@ -1815,6 +1815,36 @@ ruby_process_options(int argc, char **argv)
     return (void*)(struct RData*)iseq;
 }
 
+static void
+fill_standard_fds(void)
+{
+    int f0, f1, f2, fds[2];
+    struct stat buf;
+    f0 = fstat(0, &buf) == -1 && errno == EBADF;
+    f1 = fstat(1, &buf) == -1 && errno == EBADF;
+    f2 = fstat(2, &buf) == -1 && errno == EBADF;
+    if (f0) {
+        if (pipe(fds) == 0) {
+            close(fds[1]);
+            if (fds[0] != 0) {
+                dup2(fds[0], 0);
+                close(fds[0]);
+            }
+        }
+    }
+    if (f1 || f2) {
+        if (pipe(fds) == 0) {
+            close(fds[0]);
+            if (f1 && fds[1] != 1)
+                dup2(fds[1], 1);
+            if (f2 && fds[1] != 2)
+                dup2(fds[1], 2);
+            if (fds[1] != 1 && fds[1] != 2)
+                close(fds[1]);
+        }
+    }
+}
+
 void
 ruby_sysinit(int *argc, char ***argv)
 {
@@ -1827,4 +1857,5 @@ ruby_sysinit(int *argc, char ***argv)
 #if defined(USE_DLN_A_OUT)
     dln_argv0 = origarg.argv[0];
 #endif
+    fill_standard_fds();
 }
diff --git a/version.h b/version.h
index d343ef4d36..c121db2f50 100644
--- a/version.h
+++ b/version.h
@@ -1,5 +1,5 @@
 #define RUBY_VERSION "1.9.3"
-#define RUBY_PATCHLEVEL 45
+#define RUBY_PATCHLEVEL 46
 
 #define RUBY_RELEASE_DATE "2012-02-07"
 #define RUBY_RELEASE_YEAR 2012