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Commit 48284324 authored by David Anderson's avatar David Anderson Committed by Automerger Merge Worker
Browse files

Merge "fastboot: Add a command to get current kernel logs." am: afffa03f am: c31293d9 

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2130063



Change-Id: I34b8ff8f40d7b2579cb36ef85c3ab0a17a715144
Signed-off-by: default avatarAutomerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
parents 139de751 c31293d9

fastboot/constants.h

+1 −0
Original line number Diff line number Diff line
@@ -79,3 +79,4 @@ 
#define FB_VAR_SECURITY_PATCH_LEVEL "security-patch-level"

#define FB_VAR_TREBLE_ENABLED "treble-enabled"

#define FB_VAR_MAX_FETCH_SIZE "max-fetch-size"

#define FB_VAR_DMESG "dmesg"

fastboot/device/commands.cpp

+54 −41
Original line number Diff line number Diff line
@@ -112,7 +112,6 @@ static void GetAllVars(FastbootDevice* device, const std::string& name, 
    }

}



bool GetVarHandler(FastbootDevice* device, const std::vector<std::string>& args) {

const std::unordered_map<std::string, VariableHandlers> kVariableMap = {

        {FB_VAR_VERSION, {GetVersion, nullptr}},

        {FB_VAR_VERSION_BOOTLOADER, {GetBootloaderVersion, nullptr}},
@@ -150,14 +149,28 @@ bool GetVarHandler(FastbootDevice* device, const std::vector<std::string>& args) 
        {FB_VAR_MAX_FETCH_SIZE, {GetMaxFetchSize, nullptr}},

};



static bool GetVarAll(FastbootDevice* device) {

    for (const auto& [name, handlers] : kVariableMap) {

        GetAllVars(device, name, handlers);

    }

    return true;

}



const std::unordered_map<std::string, std::function<bool(FastbootDevice*)>> kSpecialVars = {

        {"all", GetVarAll},

        {"dmesg", GetDmesg},

};



bool GetVarHandler(FastbootDevice* device, const std::vector<std::string>& args) {

    if (args.size() < 2) {

        return device->WriteFail("Missing argument");

    }



    // Special case: return all variables that we can.

    if (args[1] == "all") {

        for (const auto& [name, handlers] : kVariableMap) {

            GetAllVars(device, name, handlers);

    // "all" and "dmesg" are multiline and handled specially.

    auto found_special = kSpecialVars.find(args[1]);

    if (found_special != kSpecialVars.end()) {

        if (!found_special->second(device)) {

            return false;

        }

        return device->WriteOkay("");

    }

fastboot/device/variables.cpp

+36 −0
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ 
#include "variables.h"



#include <inttypes.h>

#include <stdio.h>



#include <android-base/file.h>

#include <android-base/logging.h>
@@ -28,6 +29,7 @@ 
#include <fs_mgr.h>

#include <liblp/liblp.h>



#include "constants.h"

#include "fastboot_device.h"

#include "flashing.h"

#include "utility.h"
@@ -46,6 +48,7 @@ using ::android::hardware::fastboot::V1_0::Result; 
using ::android::hardware::fastboot::V1_0::Status;

using IBootControl1_1 = ::android::hardware::boot::V1_1::IBootControl;

using namespace android::fs_mgr;

using namespace std::string_literals;



constexpr char kFastbootProtocolVersion[] = "0.4";
@@ -518,3 +521,36 @@ bool GetMaxFetchSize(FastbootDevice* /* device */, const std::vector<std::string 
    *message = android::base::StringPrintf("0x%X", kMaxFetchSizeDefault);

    return true;

}



bool GetDmesg(FastbootDevice* device) {

    if (GetDeviceLockStatus()) {

        return device->WriteFail("Cannot use when device flashing is locked");

    }



    std::unique_ptr<FILE, decltype(&::fclose)> fp(popen("/system/bin/dmesg", "re"), ::fclose);

    if (!fp) {

        PLOG(ERROR) << "popen /system/bin/dmesg";

        return device->WriteFail("Unable to run dmesg: "s + strerror(errno));

    }



    ssize_t rv;

    size_t n = 0;

    char* str = nullptr;

    while ((rv = ::getline(&str, &n, fp.get())) > 0) {

        if (str[rv - 1] == '\n') {

            rv--;

        }

        device->WriteInfo(std::string(str, rv));

    }



    int saved_errno = errno;

    ::free(str);



    if (rv < 0 && saved_errno) {

        LOG(ERROR) << "dmesg getline: " << strerror(saved_errno);

        device->WriteFail("Unable to read dmesg: "s + strerror(saved_errno));

        return false;

    }



    return true;

}

fastboot/device/variables.h

+3 −0
Original line number Diff line number Diff line
@@ -83,6 +83,9 @@ bool GetTrebleEnabled(FastbootDevice* device, const std::vector<std::string>& ar 
bool GetMaxFetchSize(FastbootDevice* /* device */, const std::vector<std::string>& /* args */,

                     std::string* message);



// Complex cases.

bool GetDmesg(FastbootDevice* device);



// Helpers for getvar all.

std::vector<std::vector<std::string>> GetAllPartitionArgsWithSlot(FastbootDevice* device);

std::vector<std::vector<std::string>> GetAllPartitionArgsNoSlot(FastbootDevice* device);