--- /dev/null
+++ Libc/Libc-1583.60.2/stdlib/FreeBSD/getenv.c
@@ -0,0 +1,125 @@
+/*
+ * Copyright (c) 1987, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)getenv.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD: src/lib/libc/stdlib/getenv.c,v 1.8 2007/05/01 16:02:41 ache Exp $");
+
+#include <os/lock_private.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <string.h>
+#include <crt_externs.h>
+
+#include "libc_private.h"
+
+__private_extern__ char *__findenv_locked(const char *, int *, char **);
+
+/*
+ * __findenv_locked --
+ *	Returns pointer to value associated with name, if any, else NULL.
+ *	Sets offset to be the offset of the name/value combination in the
+ *	environmental array, for use by setenv(3) and unsetenv(3).
+ *	Explicitly removes '=' in argument name.
+ *
+ *	This routine *should* be a static; don't use it.
+ */
+__private_extern__ char *
+__findenv_locked(const char *name, int *offset, char **environ)
+{
+	int len, i;
+	const char *np;
+	char **p, *cp;
+
+	if (name == NULL || environ == NULL)
+		return (NULL);
+	for (np = name; *np && *np != '='; ++np)
+		continue;
+	len = np - name;
+	for (p = environ; (cp = *p) != NULL; ++p) {
+		for (np = name, i = len; i && *cp; i--)
+			if (*cp++ != *np++)
+				break;
+		if (i == 0 && *cp++ == '=') {
+			*offset = p - environ;
+			return (cp);
+		}
+	}
+	return (NULL);
+}
+
+static os_unfair_lock __environ_lock_obj = OS_UNFAIR_LOCK_INIT;
+void
+environ_lock_np(void)
+{
+	os_unfair_lock_lock_with_options(
+			&__environ_lock_obj, OS_UNFAIR_LOCK_DATA_SYNCHRONIZATION);
+}
+void
+environ_unlock_np(void)
+{
+	os_unfair_lock_unlock(&__environ_lock_obj);
+}
+__private_extern__ void
+__environ_lock_fork_child(void)
+{
+	__environ_lock_obj = OS_UNFAIR_LOCK_INIT;
+}
+
+/*
+ * _getenvp -- SPI using an arbitrary pointer to string array (the array must
+ * have been created with malloc) and an env state, created by _allocenvstate().
+ *	Returns ptr to value associated with name, if any, else NULL.
+ */
+char *
+_getenvp(const char *name, char ***envp, void *state __unused)
+{
+	// envp is passed as an argument, so the lock is not protecting everything
+	int offset;
+	environ_lock_np();
+	char *result = (__findenv_locked(name, &offset, *envp));
+	environ_unlock_np();
+	return result;
+}
+
+/*
+ * getenv --
+ *	Returns ptr to value associated with name, if any, else NULL.
+ */
+char *
+getenv(const char *name)
+{
+	int offset;
+	environ_lock_np();
+	char *result = __findenv_locked(name, &offset, *_NSGetEnviron());
+	environ_unlock_np();
+	return result;
+}