1 files changed, 99 insertions, 0 deletions
diff --git a/libstdc++-v3/testsuite/27_io/objects/char/9661-1.cc b/libstdc++-v3/testsuite/27_io/objects/char/9661-1.cc
new file mode 100644
index 000000000..8ca77c76e
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+++ b/libstdc++-v3/testsuite/27_io/objects/char/9661-1.cc
@@ -0,0 +1,99 @@
+// { dg-require-fork "" }
+// { dg-require-mkfifo "" }
+
+// 2003-04-30  Petur Runolfsson <peturr02@ru.is>
+
+// Copyright (C) 2003, 2004, 2005, 2006, 2007, 2009, 2010
+// Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+// No asserts, avoid leaking the semaphores if a VERIFY fails.
+#undef _GLIBCXX_ASSERT
+
+#include <testsuite_hooks.h>
+#include <cstdio>
+#include <cstdlib>
+#include <iostream>
+#include <unistd.h>
+#include <signal.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+// Check that cin.rdbuf()->sputbackc() puts characters back to stdin.
+// If cin.rdbuf() is a filebuf, this succeeds when stdin is a regular
+// file, but fails otherwise, hence the named fifo.
+bool test01()
+{
+  using namespace std;
+  using namespace __gnu_test;
+
+  bool test __attribute__((unused)) = true;
+
+  const char* name = "tmp_fifo5";
+
+  signal(SIGPIPE, SIG_IGN);
+
+  unlink(name);  
+  mkfifo(name, S_IRWXU);
+  semaphore s1, s2;
+  
+  int child = fork();
+  VERIFY( child != -1 );
+
+  if (child == 0)
+    {
+      FILE* file = fopen(name, "r+");
+      VERIFY( file != 0 );
+      fputs("Whatever\n", file);
+      fflush(file);
+      s1.signal();
+      s2.wait();
+      fclose(file);
+      s1.signal();
+      exit(0);
+    }
+
+  VERIFY( freopen(name, "r", stdin) );
+  s1.wait();
+
+  int c1 = fgetc(stdin);
+  VERIFY( c1 != EOF );
+  int c2 = cin.rdbuf()->sputbackc('a');
+  VERIFY( c2 != EOF );
+  VERIFY( c2 == 'a' );
+  
+  int c3 = fgetc(stdin);
+  VERIFY( c3 != EOF );
+  VERIFY( c3 == c2 );
+  int c4 = ungetc('b', stdin);
+  VERIFY( c4 != EOF );
+  VERIFY( c4 == 'b' );
+  
+  int c5 = cin.rdbuf()->sgetc();
+  VERIFY( c5 != EOF );
+  VERIFY( c5 == c4 );
+  s2.signal();
+  s1.wait();
+
+  return test;
+}
+
+int main()
+{
+  return !test01();
+}