Merge "Add getprop to toolbox"

cc_library_static {

    name: "libpropertyinfoparser",

    host_supported: true,

    vendor_available: true,

    srcs: ["property_info_parser.cpp"],

    cpp_std: "experimental",

cc_defaults {

    name: "propertyinfoserializer_defaults",

    host_supported: true,

    vendor_available: true,

    cpp_std: "experimental",

    target: {

        linux: {

one-true-awk: awk

toolbox: getevent newfs\_msdos

toolbox: getevent getprop newfs\_msdos

toybox: acpi base64 basename blockdev cal cat chcon chgrp chmod chown

chroot chrt cksum clear cmp comm cp cpio cut date df diff dirname dmesg

dos2unix du echo env expand expr fallocate false file find flock free

getenforce getprop groups gunzip gzip head hostname hwclock id ifconfig

inotifyd insmod ionice iorenice kill killall ln load\_policy log logname

losetup ls lsmod lsof lspci lsusb md5sum microcom mkdir mkfifo mknod

mkswap mktemp modinfo modprobe more mount mountpoint mv netstat nice

nl nohup od paste patch pgrep pidof pkill pmap printenv printf ps pwd

readlink realpath renice restorecon rm rmdir rmmod runcon sed sendevent

seq setenforce setprop setsid sha1sum sha224sum sha256sum sha384sum

getenforce groups gunzip gzip head hostname hwclock id ifconfig inotifyd

insmod ionice iorenice kill killall ln load\_policy log logname losetup

ls lsmod lsof lspci lsusb md5sum microcom mkdir mkfifo mknod mkswap

mktemp modinfo modprobe more mount mountpoint mv netstat nice nl nohup

od paste patch pgrep pidof pkill pmap printenv printf ps pwd readlink

realpath renice restorecon rm rmdir rmmod runcon sed sendevent seq

setenforce setprop setsid sha1sum sha224sum sha256sum sha384sum

sha512sum sleep sort split start stat stop strings swapoff swapon sync

sysctl tac tail tar taskset tee time timeout top touch tr true truncate

tty ulimit umount uname uniq unix2dos uptime usleep uudecode uuencode

    getevent \

    newfs_msdos \

ALL_TOOLS = $(BSD_TOOLS) $(OUR_TOOLS)

OUR_CPP_TOOLS := \

    getprop \

ALL_TOOLS = $(BSD_TOOLS) $(OUR_TOOLS) $(OUR_CPP_TOOLS)

LOCAL_SRC_FILES := \

    toolbox.c \

    $(patsubst %,%.c,$(OUR_TOOLS)) \

    $(patsubst %,%.cpp,$(OUR_CPP_TOOLS)) \

LOCAL_CFLAGS += $(common_cflags)

LOCAL_CPPFLAGS += -std=gnu++1z

LOCAL_C_INCLUDES += $(LOCAL_PATH)/upstream-netbsd/include/

LOCAL_SHARED_LIBRARIES := \

    libbase \

    libcutils \

LOCAL_STATIC_LIBRARIES := libpropertyinfoparser

LOCAL_WHOLE_STATIC_LIBRARIES := $(patsubst %,libtoolbox_%,$(BSD_TOOLS))

LOCAL_MODULE := toolbox

//

// Copyright (C) 2017 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 <getopt.h>

#include <sys/system_properties.h>

#include <iostream>

#include <string>

#include <vector>

#include <android-base/properties.h>

#include <property_info_parser/property_info_parser.h>

using android::base::GetProperty;

using android::properties::PropertyInfoAreaFile;

PropertyInfoAreaFile property_info_file;

void PrintAllProperties(bool print_property_context) {

  std::vector<std::pair<std::string, std::string>> properties;

  __system_property_foreach(

      [](const prop_info* pi, void* cookie) {

        __system_property_read_callback(

            pi,

            [](void* cookie, const char* name, const char* value, unsigned) {

              auto properties =

                  reinterpret_cast<std::vector<std::pair<std::string, std::string>>*>(cookie);

              properties->emplace_back(name, value);

            },

            cookie);

      },

      &properties);

  std::sort(properties.begin(), properties.end());

  if (print_property_context) {

    for (auto& [name, value] : properties) {

      const char* context = nullptr;

      property_info_file->GetPropertyInfo(name.c_str(), &context, nullptr);

      value = context;

    }

  }

  for (const auto& [name, value] : properties) {

    std::cout << "[" << name << "]: [" << value << "]" << std::endl;

  }

}

void PrintProperty(const char* name, const char* default_value, bool print_property_context) {

  if (print_property_context) {

    const char* context = nullptr;

    property_info_file->GetPropertyInfo(name, &context, nullptr);

    std::cout << context << std::endl;

  } else {

    std::cout << GetProperty(name, default_value) << std::endl;

  }

}

extern "C" int getprop_main(int argc, char** argv) {

  bool print_property_context = false;

  while (true) {

    static const struct option long_options[] = {

        {"help", no_argument, nullptr, 'h'},

        {nullptr, 0, nullptr, 0},

    };

    int arg = getopt_long(argc, argv, "Z", long_options, nullptr);

    if (arg == -1) {

      break;

    }

    switch (arg) {

      case 'h':

        std::cout << "usage: getprop [-Z] [NAME [DEFAULT]]\n\n"

                     "Gets an Android system property, or lists them all.\n"

                     "Use -Z to return the property context instead of the property value\n"

                  << std::endl;

        return 0;

      case 'Z':

        print_property_context = true;

        break;

      case '?':

        return -1;

      default:

        std::cerr << "getprop: getopt returned invalid result: " << arg << std::endl;

        return -1;

    }

  }

  if (print_property_context) {

    property_info_file.LoadDefaultPath();

    if (!property_info_file) {

      std::cerr << "Unable to load property info file" << std::endl;

      return -1;

    }

  }

  if (optind >= argc) {

    PrintAllProperties(print_property_context);

    return 0;

  }

  if (optind < argc - 2) {

    std::cerr << "getprop: Max 2 arguments (see \"getprop --help\")" << std::endl;

    return -1;

  }

  PrintProperty(argv[optind], (optind == argc - 1) ? "" : argv[optind + 1], print_property_context);

  return 0;

}