auto import from //depot/cupcake/@135843
diff --git a/toolbox/renice.c b/toolbox/renice.c
new file mode 100644
index 0000000..978b329
--- /dev/null
+++ b/toolbox/renice.c
@@ -0,0 +1,144 @@
+/*
+ * Copyright (c) 2008, 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.
+ * * Neither the name of Google, Inc. 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 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 <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <sched.h>
+
+static void
+usage(const char *s)
+{
+ fprintf(stderr, "USAGE: %s [[-r] priority pids ...] [-g pid]\n", s);
+ exit(EXIT_FAILURE);
+}
+
+void print_prio(pid_t pid)
+{
+ int sched;
+ struct sched_param sp;
+
+ printf("pid %d's priority: %d\n", pid, getpriority(PRIO_PROCESS, pid));
+
+ printf("scheduling class: ");
+ sched = sched_getscheduler(pid);
+ switch (sched) {
+ case SCHED_FIFO:
+ printf("FIFO\n");
+ break;
+ case SCHED_RR:
+ printf("RR\n");
+ break;
+ case SCHED_OTHER:
+ printf("Normal\n");
+ break;
+ case -1:
+ perror("sched_getscheduler");
+ break;
+ default:
+ printf("Unknown\n");
+ }
+
+ sched_getparam(pid, &sp);
+ printf("RT prio: %d (of %d to %d)\n", sp.sched_priority,
+ sched_get_priority_min(sched), sched_get_priority_max(sched));
+}
+
+int renice_main(int argc, char *argv[])
+{
+ int prio;
+ int realtime = 0;
+ char *cmd = argv[0];
+
+ // consume command name
+ argc--;
+ argv++;
+
+ if (argc < 1)
+ usage(cmd);
+
+ if(strcmp("-r", argv[0]) == 0) {
+ // do realtime priority adjustment
+ realtime = 1;
+ argc--;
+ argv++;
+ }
+
+ if(strcmp("-g", argv[0]) == 0) {
+ if (argc < 2)
+ usage(cmd);
+ print_prio(atoi(argv[1]));
+ return 0;
+ }
+
+ if (argc < 1)
+ usage(cmd);
+
+ prio = atoi(argv[0]);
+ argc--;
+ argv++;
+
+ if (argc < 1)
+ usage(cmd);
+
+ while(argc) {
+ pid_t pid;
+
+ pid = atoi(argv[0]);
+ argc--;
+ argv++;
+
+ if (realtime) {
+ struct sched_param sp = { .sched_priority = prio };
+ int ret;
+
+ ret = sched_setscheduler(pid, SCHED_RR, &sp);
+ if (ret) {
+ perror("sched_set_scheduler");
+ exit(EXIT_FAILURE);
+ }
+ } else {
+ int ret;
+
+ ret = setpriority(PRIO_PROCESS, pid, prio);
+ if (ret) {
+ perror("setpriority");
+ exit(EXIT_FAILURE);
+ }
+ }
+ }
+
+ return 0;
+}
+
+