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platform_system_core
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Merge "init: Terminate gracefully when CAP_SYS_BOOT is absent" am: fbb482f499 am: ec8a5f2aa6 

am: 6d815a554d

Change-Id: I1ca1bb153b3e3725f695107d56cc36a54a0379f1
This commit is contained in:
Luis Hector Chavez 2017-06-27 23:07:18 +00:00 committed by android-build-merger
parent 6c95c3edcd 6d815a554d
commit e955adacb7
1 changed files with 23 additions and 0 deletions
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23
init/reboot.cpp
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@ -21,6 +21,7 @@
#include <linux/fs.h>
#include <mntent.h>
#include <selinux/selinux.h>
#include <sys/capability.h>
#include <sys/cdefs.h>
#include <sys/ioctl.h>
#include <sys/mount.h>
@ -39,6 +40,7 @@
#include <android-base/logging.h>
#include <android-base/macros.h>
#include <android-base/properties.h>
#include <android-base/scopeguard.h>
#include <android-base/stringprintf.h>
#include <android-base/strings.h>
#include <android-base/unique_fd.h>
@ -162,9 +164,30 @@ static void LogShutdownTime(UmountStat stat, Timer* t) {
LOG(WARNING) << "powerctl_shutdown_time_ms:" << std::to_string(t->duration_ms()) << ":" << stat;
}
static bool IsRebootCapable() {
cap_t caps = cap_init();
auto scopeguard = android::base::make_scope_guard([&caps] { cap_free(caps); });
// Assume we have the capability.
cap_flag_value_t value = CAP_SET;
if (!CAP_IS_SUPPORTED(CAP_SYS_BOOT) ||
cap_get_flag(caps, CAP_SYS_BOOT, CAP_EFFECTIVE, &value) != 0) {
PLOG(ERROR) << "cap_get_flag(CAP_BOOT, EFFECTIVE) failed";
}
return value == CAP_SET;
}
static void __attribute__((noreturn))
RebootSystem(unsigned int cmd, const std::string& rebootTarget) {
LOG(INFO) << "Reboot ending, jumping to kernel";
if (!IsRebootCapable()) {
// On systems where init does not have the capability of rebooting the
// device, just exit cleanly.
exit(0);
}
switch (cmd) {
case ANDROID_RB_POWEROFF:
reboot(RB_POWER_OFF);