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diff --git a/gnulib b/gnulib
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diff --git a/gnulib/tests/test-posix_openpt.c b/gnulib/tests/test-posix_openpt.c
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+/* Test of posix_openpt function.
+ Copyright (C) 2011 Free Software Foundation, Inc.
+
+ This program 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 of the License, or
+ (at your option) any later version.
+
+ This program 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 program. If not, see <http://www.gnu.org/licenses/>. */
+
+/* Written by Eric Blake <eblake@redhat.com>, 2011. */
+
+#include <config.h>
+
+#include <stdlib.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (posix_openpt, int, (int));
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#if defined __sun || defined __hpux /* Solaris, HP-UX */
+# include <stropts.h>
+#endif
+
+#include "macros.h"
+
+int
+main (void)
+{
+ int master;
+ int slave;
+ char *name;
+
+ /* Open the master of a pseudo-terminal pair. */
+ master = posix_openpt (O_RDWR | O_NOCTTY);
+ if (master < 0 && errno == ENOSYS)
+ {
+ fputs ("skipping: platform lacks pty support\n", stderr);
+ return 77;
+ }
+
+ ASSERT (0 <= master);
+ name = ptsname (master);
+ ASSERT (name);
+ ASSERT (grantpt (master) == 0);
+ ASSERT (unlockpt (master) == 0);
+ slave = open (name, O_RDWR);
+ ASSERT (0 <= slave);
+
+#if defined __sun || defined __hpux /* Solaris, HP-UX */
+ ASSERT (ioctl (slave, I_PUSH, "ptem") == 0);
+ ASSERT (ioctl (slave, I_PUSH, "ldterm") == 0);
+# if defined __sun
+ ASSERT (ioctl (slave, I_PUSH, "ttcompat") == 0);
+# endif
+#endif
+
+ ASSERT (isatty (slave));
+
+ /* Close the master side before the slave side gets closed.
+ This is necessary on MacOS X 10.4.11. */
+ ASSERT (close (master) == 0);
+ ASSERT (close (slave) == 0);
+
+ return 0;
+}