toolbox: Make reboot a separate command from toolbox

Set the CAP_SYS_BOOT filesystem capability on the new reboot
command and keep CAP_SYS_BOOT in adb bounding set so that the
shell user can run it.

Change-Id: I1dd6143445ee2a952254f0452ab6e544318431dd

2 files changed, 86 insertions, 0 deletions

diff --git a/reboot/Android.mk b/reboot/Android.mk
new file mode 100644
index 0000000..4db0c1e
--- /dev/null
+++ b/reboot/Android.mk
@@ -0,0 +1,12 @@
+# Copyright 2013 The Android Open Source Project
+
+LOCAL_PATH:= $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES:= reboot.c
+
+LOCAL_SHARED_LIBRARIES:= libcutils
+
+LOCAL_MODULE:= reboot
+
+include $(BUILD_EXECUTABLE)
diff --git a/reboot/reboot.c b/reboot/reboot.c
new file mode 100644
index 0000000..45d8a8e
--- /dev/null
+++ b/reboot/reboot.c
@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <cutils/android_reboot.h>
+#include <unistd.h>
+
+int main(int argc, char *argv[])
+{
+    int ret;
+    int nosync = 0;
+    int poweroff = 0;
+    int flags = 0;
+
+    opterr = 0;
+    do {
+        int c;
+
+        c = getopt(argc, argv, "np");
+
+        if (c == EOF) {
+            break;
+        }
+
+        switch (c) {
+        case 'n':
+            nosync = 1;
+            break;
+        case 'p':
+            poweroff = 1;
+            break;
+        case '?':
+            fprintf(stderr, "usage: %s [-n] [-p] [rebootcommand]\n", argv[0]);
+            exit(EXIT_FAILURE);
+        }
+    } while (1);
+
+    if(argc > optind + 1) {
+        fprintf(stderr, "%s: too many arguments\n", argv[0]);
+        exit(EXIT_FAILURE);
+    }
+
+    if(nosync)
+        /* also set NO_REMOUNT_RO as remount ro includes an implicit sync */
+        flags = ANDROID_RB_FLAG_NO_SYNC | ANDROID_RB_FLAG_NO_REMOUNT_RO;
+
+    if(poweroff)
+        ret = android_reboot(ANDROID_RB_POWEROFF, flags, 0);
+    else if(argc > optind)
+        ret = android_reboot(ANDROID_RB_RESTART2, flags, argv[optind]);
+    else
+        ret = android_reboot(ANDROID_RB_RESTART, flags, 0);
+    if(ret < 0) {
+        perror("reboot");
+        exit(EXIT_FAILURE);
+    }
+    fprintf(stderr, "reboot returned\n");
+    return 0;
+}