Function kenv_acquire

freebsd/kern/kern_environment.c:625–638

* Return the internal kenv buffer for the variable name, if it exists. * If the dynamic kenv is initialized and the name is present, return * with kenv_lock held. */

 * with kenv_lock held.
 */
static char *
kenv_acquire(const char *name)
{
	char *value;

	if (dynamic_kenv) {
		mtx_lock(&kenv_lock);
		value = _getenv_dynamic(name, NULL);
		if (value == NULL)
			mtx_unlock(&kenv_lock);
		return (value);
	} else
		return (_getenv_static(name));
}

/*
 * Undo a previous kenv_acquire() operation