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Merge "Log pid for writes to sys.powerctl"

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Tom Cherry 2017-09-06 16:58:23 +00:00 committed by Gerrit Code Review
commit 2827106d7d
1 changed files with 16 additions and 0 deletions
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16
init/property_service.cpp
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@ -45,6 +45,7 @@
#include <android-base/file.h>
#include <android-base/logging.h>
#include <android-base/properties.h>
#include <android-base/stringprintf.h>
#include <android-base/strings.h>
#include <bootimg.h>
#include <fs_mgr.h>
@ -56,6 +57,7 @@
#include "persistent_properties.h"
#include "util.h"
using android::base::StringPrintf;
using android::base::Timer;
#define RECOVERY_MOUNT_POINT "/recovery"
@ -418,6 +420,20 @@ static void handle_property_set(SocketConnection& socket,
}
} else {
if (check_mac_perms(name, source_ctx, &cr)) {
// sys.powerctl is a special property that is used to make the device reboot. We want to log
// any process that sets this property to be able to accurately blame the cause of a shutdown.
if (name == "sys.powerctl") {
std::string cmdline_path = StringPrintf("proc/%d/cmdline", cr.pid);
std::string process_cmdline;
std::string process_log_string;
if (android::base::ReadFileToString(cmdline_path, &process_cmdline)) {
// Since cmdline is null deliminated, .c_str() conveniently gives us just the process path.
process_log_string = StringPrintf(" (%s)", process_cmdline.c_str());
}
LOG(INFO) << "Received sys.powerctl='" << value << "' from pid: " << cr.pid
<< process_log_string;
}
uint32_t result = property_set(name, value);
if (!legacy_protocol) {
socket.SendUint32(result);