Refresh toolbox.

Use more upstream NetBSD, and update those things that were already NetBSD.

Note that unlike bionic, the upstream-netbsd directory isn't pristine; we have
changes marked by __ANDROID__.

Bug: 16493461

(cherry picked from commit fd4c6b0a3a25921a9fe24691a695d715aecb6afe)

Change-Id: I53267edaac0b92ad062a5df0f3201e3952eb084e
diff --git a/toolbox/pwcache.c b/toolbox/pwcache.c
new file mode 100644
index 0000000..9d81981
--- /dev/null
+++ b/toolbox/pwcache.c
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2014, The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
+ * COPYRIGHT OWNER 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.
+ */
+
+#include <grp.h>
+#include <pwd.h>
+#include <stdio.h>
+#include <sys/types.h>
+
+int uid_from_user(const char* name, uid_t* uid) {
+  struct passwd* pw = getpwnam(name);
+  if (pw == NULL) {
+    return -1;
+  }
+  *uid = pw->pw_uid;
+  return 0;
+}
+
+char* group_from_gid(gid_t gid, int noname) {
+  struct group* g = getgrgid(gid);
+  if (g == NULL) {
+    static char buf[32];
+    snprintf(buf, sizeof(buf), "%lu", (long) gid);
+    return noname ? NULL : buf;
+  }
+  return g->gr_name;
+}
+
+char* user_from_uid(uid_t uid, int noname) {
+  struct passwd* pw = getpwuid(uid);
+  if (pw == NULL) {
+    static char buf[32];
+    snprintf(buf, sizeof(buf), "%lu", (long) uid);
+    return noname ? NULL : buf;
+  }
+  return pw->pw_name;
+}