--- /dev/null
+++ Libc/Libc-1583.40.7/stdlib/grantpt.c
@@ -0,0 +1,146 @@
+/*
+ * Copyright (c) 2005 Apple Computer, Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ * 
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ * 
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+#include <os/assumes.h>
+#include <os/once_private.h>
+#include <pthread.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+
+/*
+ * posix_openpt call for cloning pty implementation.
+ *
+ * Just open /dev/ptmx
+ */
+int
+posix_openpt(int flags)
+{
+	int fd = open("/dev/ptmx", flags);
+	if (fd >= 0)
+		return fd;
+	return -1;
+}
+
+/*
+ * grantpt call for cloning pty implementation.
+ *
+ * Change UID and GID of replica pty associated with primary pty whose
+ * fd is provided, to the real UID and real GID of the calling thread.
+ */
+int
+grantpt(int fd)
+{
+	return ioctl(fd, TIOCPTYGRANT);
+}
+
+// defined by TIOCPTYGNAME
+#define PTSNAME_MAX_SIZE 128
+
+static pthread_key_t ptsname_buffer_specific_key;
+static os_once_t ptsname_once;
+
+static void
+ptsname_once_init(void *ctx __unused)
+{
+	int ret = pthread_key_create(&ptsname_buffer_specific_key, free);
+	os_assert_zero(ret);
+}
+
+/*
+ * ptsname call for cloning pty implementation.
+ *
+ * NOTE: Returns a pointer to a static buffer, which will be overwritten on
+ * subsequent calls.
+ */
+char *
+ptsname(int fd)
+{
+	os_once(&ptsname_once, NULL, ptsname_once_init);
+	char *ptsnamebuf = pthread_getspecific(ptsname_buffer_specific_key);
+
+	if (ptsnamebuf == NULL) {
+		ptsnamebuf = malloc(PTSNAME_MAX_SIZE);
+		os_assert(ptsnamebuf);
+
+		int error = pthread_setspecific(ptsname_buffer_specific_key, ptsnamebuf);
+		os_assert_zero(error);
+	}
+
+	int error = ptsname_r(fd, ptsnamebuf, PTSNAME_MAX_SIZE);
+
+	return error ? NULL : ptsnamebuf;
+}
+
+int
+ptsname_r(int fd, char *buffer, size_t buflen)
+{
+	int error;
+	struct stat sbuf;
+	char ptsnamebuf[PTSNAME_MAX_SIZE];
+
+	if (!buffer) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	error = ioctl(fd, TIOCPTYGNAME, ptsnamebuf);
+	if (error) {
+		return -1;
+	}
+
+	/*
+	 * XXX TSD
+	 *
+	 * POSIX: Handle device rename test case, which is expected
+	 * to fail if the pty has been renamed.
+	 */
+	error = stat(ptsnamebuf, &sbuf);
+	if (error) {
+		return -1;
+	}
+
+	size_t len = strlen(ptsnamebuf) + 1;
+	if (buflen < len) {
+		errno = ERANGE;
+		return -1;
+	}
+
+	memcpy(buffer, ptsnamebuf, len);
+
+	return 0;
+}
+
+/*
+ * unlockpt call for cloning pty implementation.
+ *
+ * Unlock the replica pty associated with the primary to which fd refers.
+ */
+int
+unlockpt(int fd)
+{
+	return ioctl(fd, TIOCPTYUNLK);
+}