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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
/*
* This is a tool that will be useful for various tasks if/when we build LO on WSL
*
* It is a Win32 program, not a Linux (WSL) one.
*
* Compile as: cl -MD wsl-lo-helper.cpp advapi32.lib
*/
#include <cstdio>
#include <cstring>
#include <Windows.h>
static void print_result(const wchar_t* argv0, const wchar_t* result)
{
char output[1000];
if (WideCharToMultiByte(CP_UTF8, WC_ERR_INVALID_CHARS, result, -1, output, sizeof(output), NULL,
NULL)
== 0)
{
fprintf(stderr, "%S --8.3: Could not convert result to UTF-8.\n", argv0);
exit(1);
}
// Intentionally output no newline at end
printf("%s", output);
fflush(stdout);
}
int wmain(int argc, wchar_t** argv)
{
if (argc <= 1)
{
fprintf(stderr, "%S: Usage:\n", argv[0]);
fprintf(stderr, "%S --8.3 <windows-pathname>\n", argv[0]);
fprintf(stderr, " Print the 8.3 form of a Windows pathnam. Fail it not present.\n");
fprintf(stderr, "%S --read-registry [32|64] <path>\n", argv[0]);
fprintf(stderr, " Read a string value from the Registry and print it.\n");
exit(1);
}
if (wcscmp(argv[1], L"--8.3") == 0)
{
if (argc != 3)
{
fprintf(stderr, "%S --8.3: One pathname argument expected\n", argv[0]);
exit(1);
}
// The argument should be a pathname in Windows format. The
// output will be the 8.3 pathname if present. If not present,
// return failure.
wchar_t woutput[1000];
if (GetShortPathNameW(argv[2], woutput, sizeof(woutput) / sizeof(woutput[0])) == 0)
{
fprintf(stderr, "%S --8.3: Could not get short pathname of %S.\n", argv[0], argv[2]);
exit(1);
}
print_result(argv[0], woutput);
}
else if (wcscmp(argv[1], L"--read-registry") == 0)
{
if (argc != 4)
{
fprintf(stderr, "%S --read-registry: Bitness and path arguments expected.\n", argv[0]);
exit(1);
}
REGSAM sam;
if (wcscmp(argv[2], L"32") == 0)
sam = KEY_WOW64_32KEY;
else if (wcscmp(argv[2], L"64") == 0)
sam = KEY_WOW64_64KEY;
else
{
fprintf(stderr, "%S --read-registry: Use 32 or 64.\n", argv[0]);
exit(1);
}
wchar_t* path = wcsdup(argv[3]);
for (wchar_t* p = path; *p != L'\0'; p++)
if (*p == '/')
*p = '\\';
wchar_t* const first_backslash = wcschr(path, L'\\');
if (first_backslash == NULL)
{
fprintf(stderr, "%S: Invalid path %S to value in the Registry.\n", argv[0], path);
exit(1);
}
*first_backslash = L'\0';
wchar_t* const key_path = first_backslash + 1;
HKEY hive;
const wchar_t* hive_name;
if (wcscmp(path, L"HKEY_CLASSES_ROOT") == 0)
{
hive = HKEY_CLASSES_ROOT;
hive_name = L"HKEY_CLASSES_ROOT";
}
else if (wcscmp(path, L"HKEY_CURRENT_CONFIG") == 0)
{
hive = HKEY_CURRENT_CONFIG;
hive_name = L"HKEY_CURRENT_CONFIG";
}
else if (wcscmp(path, L"HKEY_CURRENT_USER") == 0)
{
hive = HKEY_CURRENT_USER;
hive_name = L"HKEY_CURRENT_USER";
}
else if (wcscmp(path, L"HKEY_LOCAL_MACHINE") == 0)
{
hive = HKEY_LOCAL_MACHINE;
hive_name = L"HKEY_LOCAL_MACHINE";
}
else if (wcscmp(path, L"HKEY_USERS") == 0)
{
hive = HKEY_USERS;
hive_name = L"HKEY_USERS";
}
else
{
fprintf(stderr, "%S: Invalid Registry hive %S.\n", argv[0], path);
exit(1);
}
DWORD type;
wchar_t result[1000];
DWORD count = sizeof(result);
wchar_t* last_backslash = wcsrchr(key_path, L'\\');
if (last_backslash == NULL)
{
fprintf(stderr, "%S: Invalid path %S\\%S to value in the Registry.\n", argv[0],
hive_name, key_path);
exit(1);
}
*last_backslash = L'\0';
wchar_t* value = last_backslash + 1;
HKEY key;
if (RegOpenKeyExW(hive, key_path, 0, KEY_QUERY_VALUE | sam, &key) != ERROR_SUCCESS)
{
fprintf(stderr, "%S: Opening key %S\\%S in %S-bit Registry failed.\n", argv[0],
hive_name, key_path, argv[2]);
exit(1);
}
if (RegQueryValueExW(key, value, NULL, &type, (LPBYTE)result, &count) != ERROR_SUCCESS)
{
fprintf(stderr, "%S: Reading value %S\\%S\\%S from %S-bit Registry failed.\n", argv[0],
hive_name, key_path, value, argv[2]);
exit(1);
}
if (type != REG_SZ)
{
fprintf(stderr, "%S: Value %S\\%S\\%S is not a string.\n", argv[0], hive_name, key_path,
value);
exit(1);
}
print_result(argv[0], result);
}
else
{
fprintf(stderr, "%S: Unrecognized sub-command %S.\n", argv[0], argv[1]);
exit(1);
}
return 0;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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