Stop calling fsck on shutdown by default

Instead, run the command only when sys.powerctl is set to
"shutdown,userrequested". This way, we can avoid running
fsck when shutdown is triggered due to a low power state.

This is a follow-up CL for http://r.android.com/158525.

Bug: 21853106
Change-Id: Ie57c23cd25162cc2a8726f876a9ba212080105fb

1 files changed, 11 insertions, 7 deletions

diff --git a/init/builtins.cpp b/init/builtins.cpp
index d5d3faff6..b079dfbfa 100644
--- a/init/builtins.cpp
+++ b/init/builtins.cpp
@@ -623,8 +623,8 @@ int do_powerctl(int nargs, char **args)
     char command[PROP_VALUE_MAX];
     int res;
     int len = 0;
-    int cmd = 0;
-    const char *reboot_target;
+    unsigned int cmd = 0;
+    const char *reboot_target = "";
     void (*callback_on_ro_remount)(const struct mntent*) = NULL;
 
     res = expand_props(command, args[1], sizeof(command));
@@ -636,7 +636,6 @@ int do_powerctl(int nargs, char **args)
     if (strncmp(command, "shutdown", 8) == 0) {
         cmd = ANDROID_RB_POWEROFF;
         len = 8;
-        callback_on_ro_remount = unmount_and_fsck;
     } else if (strncmp(command, "reboot", 6) == 0) {
         cmd = ANDROID_RB_RESTART2;
         len = 6;
@@ -646,10 +645,15 @@ int do_powerctl(int nargs, char **args)
     }
 
     if (command[len] == ',') {
-        reboot_target = &command[len + 1];
-    } else if (command[len] == '\0') {
-        reboot_target = "";
-    } else {
+        if (cmd == ANDROID_RB_POWEROFF &&
+            !strcmp(&command[len + 1], "userrequested")) {
+            // The shutdown reason is PowerManager.SHUTDOWN_USER_REQUESTED.
+            // Run fsck once the file system is remounted in read-only mode.
+            callback_on_ro_remount = unmount_and_fsck;
+        } else if (cmd == ANDROID_RB_RESTART2) {
+            reboot_target = &command[len + 1];
+        }
+    } else if (command[len] != '\0') {
         ERROR("powerctl: unrecognized reboot target '%s'\n", &command[len]);
         return -EINVAL;
     }