adb: win32: make adb_getenv() case-insensitive

LIBADB_TEST_darwin_SRCS := \

    fdevent_test.cpp \

LIBADB_TEST_windows_SRCS := \

    sysdeps_win32_test.cpp \

include $(CLEAR_VARS)

LOCAL_CLANG := true

LOCAL_MODULE := libadbd

LOCAL_SRC_FILES_linux := $(LIBADB_TEST_linux_SRCS)

LOCAL_SRC_FILES_darwin := $(LIBADB_TEST_darwin_SRCS)

LOCAL_SRC_FILES_windows := $(LIBADB_TEST_windows_SRCS)

LOCAL_SANITIZE := $(adb_host_sanitize)

LOCAL_SHARED_LIBRARIES := libbase

LOCAL_STATIC_LIBRARIES := \

    libcrypto_static \

    libcutils \

# Set entrypoint to wmain from sysdeps_win32.cpp instead of main

LOCAL_LDFLAGS_windows := -municode

LOCAL_LDLIBS_linux := -lrt -ldl -lpthread

LOCAL_LDLIBS_darwin := -framework CoreFoundation -framework IOKit

LOCAL_LDLIBS_windows := -lws2_32 -luserenv

    return 0;

}

#ifdef _WIN32

static bool _argv_is_utf8 = false;

#endif

int main(int argc, char** argv) {

#ifdef _WIN32

    if (!_argv_is_utf8) {

        fatal("_argv_is_utf8 is not set, suggesting that wmain was not "

              "called. Did you forget to link with -municode?");

    }

#endif

    adb_sysdeps_init();

    adb_trace_init(argv);

    return adb_commandline(argc - 1, const_cast<const char**>(argv + 1));

}

#ifdef _WIN32

extern "C"

int wmain(int argc, wchar_t **argv) {

    // Set diagnostic flag to try to detect if the build system was not

    // configured to call wmain.

    _argv_is_utf8 = true;

    // Convert args from UTF-16 to UTF-8 and pass that to main().

    NarrowArgs narrow_args(argc, argv);

    return main(argc, narrow_args.data());

}

#endif

#include <stdio.h>

#include <stdlib.h>

#include <algorithm>

#include <memory>

#include <string>

#include <unordered_map>

    return _wfopen(widen(f).c_str(), widen(m).c_str());

}

// Return a lowercase version of the argument. Uses C Runtime tolower() on

// each byte which is not UTF-8 aware, and theoretically uses the current C

// Runtime locale (which in practice is not changed, so this becomes a ASCII

// conversion).

static std::string ToLower(const std::string& anycase) {

    // copy string

    std::string str(anycase);

    // transform the copy

    std::transform(str.begin(), str.end(), str.begin(), tolower);

    return str;

}

extern "C" int main(int argc, char** argv);

// Link with -municode to cause this wmain() to be used as the program

// entrypoint. It will convert the args from UTF-16 to UTF-8 and call the

// regular main() with UTF-8 args.

extern "C" int wmain(int argc, wchar_t **argv) {

    // Convert args from UTF-16 to UTF-8 and pass that to main().

    NarrowArgs narrow_args(argc, argv);

    return main(argc, narrow_args.data());

}

// Shadow UTF-8 environment variable name/value pairs that are created from

// _wenviron the first time that adb_getenv() is called. Note that this is not

// currently updated if putenv, setenv, unsetenv are called. Note that no

        return;

    }

    if (_wenviron == nullptr) {

        // If _wenviron is null, then -municode probably wasn't used. That

        // linker flag will cause the entry point to setup _wenviron. It will

        // also require an implementation of wmain() (which we provide above).

        fatal("_wenviron is not set, did you link with -municode?");

    }

    // Read name/value pairs from UTF-16 _wenviron and write new name/value

    // pairs to UTF-8 g_environ_utf8. Note that it probably does not make sense

    // to use the D() macro here because that tracing only works if the

            continue;

        }

        const std::string name_utf8(narrow(std::wstring(*env, equal - *env)));

        // Store lowercase name so that we can do case-insensitive searches.

        const std::string name_utf8(ToLower(narrow(

                std::wstring(*env, equal - *env))));

        char* const value_utf8 = strdup(narrow(equal + 1).c_str());

        // Overwrite any duplicate name, but there shouldn't be a dup in the

        // first place.

        g_environ_utf8[name_utf8] = value_utf8;

        // Don't overwrite a previus env var with the same name. In reality,

        // the system probably won't let two env vars with the same name exist

        // in _wenviron.

        g_environ_utf8.insert({name_utf8, value_utf8});

    }

}

// Version of getenv() that takes a UTF-8 environment variable name and

// retrieves a UTF-8 value.

// retrieves a UTF-8 value. Case-insensitive to match getenv() on Windows.

char* adb_getenv(const char* name) {

    _ensure_env_setup();

    const auto it = g_environ_utf8.find(std::string(name));

    // Case-insensitive search by searching for lowercase name in a map of

    // lowercase names.

    const auto it = g_environ_utf8.find(ToLower(std::string(name)));

    if (it == g_environ_utf8.end()) {

        return nullptr;

    }

/*

 * Copyright (C) 2015 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 <gtest/gtest.h>

#include "sysdeps.h"

TEST(sysdeps_win32, adb_getenv) {

    // Insert all test env vars before first call to adb_getenv() which will

    // read the env var block only once.

    ASSERT_EQ(0, _putenv("SYSDEPS_WIN32_TEST_UPPERCASE=1"));

    ASSERT_EQ(0, _putenv("sysdeps_win32_test_lowercase=2"));

    ASSERT_EQ(0, _putenv("Sysdeps_Win32_Test_MixedCase=3"));

    // UTF-16 value

    ASSERT_EQ(0, _wputenv(L"SYSDEPS_WIN32_TEST_UNICODE=\u00a1\u0048\u006f\u006c"

                          L"\u0061\u0021\u03b1\u03b2\u03b3\u0061\u006d\u0062"

                          L"\u0075\u006c\u014d\u043f\u0440\u0438\u0432\u0435"

                          L"\u0442"));

    // Search for non-existant env vars.

    EXPECT_STREQ(nullptr, adb_getenv("SYSDEPS_WIN32_TEST_NONEXISTANT"));

    // Search for existing env vars.

    // There is no test for an env var with a value of a zero-length string

    // because _putenv() does not support inserting such an env var.

    // Search for env var that is uppercase.

    EXPECT_STREQ("1", adb_getenv("SYSDEPS_WIN32_TEST_UPPERCASE"));

    EXPECT_STREQ("1", adb_getenv("sysdeps_win32_test_uppercase"));

    EXPECT_STREQ("1", adb_getenv("Sysdeps_Win32_Test_Uppercase"));

    // Search for env var that is lowercase.

    EXPECT_STREQ("2", adb_getenv("SYSDEPS_WIN32_TEST_LOWERCASE"));

    EXPECT_STREQ("2", adb_getenv("sysdeps_win32_test_lowercase"));

    EXPECT_STREQ("2", adb_getenv("Sysdeps_Win32_Test_Lowercase"));

    // Search for env var that is mixed-case.

    EXPECT_STREQ("3", adb_getenv("SYSDEPS_WIN32_TEST_MIXEDCASE"));

    EXPECT_STREQ("3", adb_getenv("sysdeps_win32_test_mixedcase"));

    EXPECT_STREQ("3", adb_getenv("Sysdeps_Win32_Test_MixedCase"));

    // Check that UTF-16 was converted to UTF-8.

    EXPECT_STREQ("\xc2\xa1\x48\x6f\x6c\x61\x21\xce\xb1\xce\xb2\xce\xb3\x61\x6d"

                 "\x62\x75\x6c\xc5\x8d\xd0\xbf\xd1\x80\xd0\xb8\xd0\xb2\xd0\xb5"

                 "\xd1\x82",

                 adb_getenv("SYSDEPS_WIN32_TEST_UNICODE"));

    // Check an env var that should always be set.

    const char* path_val = adb_getenv("PATH");

    EXPECT_NE(nullptr, path_val);

    if (path_val != nullptr) {

        EXPECT_GT(strlen(path_val), 0);

    }

}