Sweden-Number/programs/reg/query.c

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/*
* Copyright 2016-2017, 2021 Hugh McMaster
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <stdio.h>
#include "reg.h"
static const WCHAR *reg_type_to_wchar(DWORD type)
{
int i, array_size = ARRAY_SIZE(type_rels);
for (i = 0; i < array_size; i++)
{
if (type == type_rels[i].type)
return type_rels[i].name;
}
return NULL;
}
static WCHAR *reg_data_to_wchar(DWORD type, const BYTE *src, DWORD size_bytes)
{
WCHAR *buffer = NULL;
int i;
switch (type)
{
case REG_SZ:
case REG_EXPAND_SZ:
buffer = malloc(size_bytes);
lstrcpyW(buffer, (WCHAR *)src);
break;
case REG_NONE:
case REG_BINARY:
{
WCHAR *ptr;
buffer = malloc((size_bytes * 2 + 1) * sizeof(WCHAR));
if (!size_bytes)
{
*buffer = 0;
break;
}
ptr = buffer;
for (i = 0; i < size_bytes; i++)
ptr += swprintf(ptr, 3, L"%02X", src[i]);
break;
}
case REG_DWORD:
/* case REG_DWORD_LITTLE_ENDIAN: */
case REG_DWORD_BIG_ENDIAN:
{
const int zero_x_dword = 10;
buffer = malloc((zero_x_dword + 1) * sizeof(WCHAR));
swprintf(buffer, zero_x_dword + 1, L"0x%x", *(DWORD *)src);
break;
}
case REG_MULTI_SZ:
{
const int two_wchars = 2 * sizeof(WCHAR);
DWORD tmp_size;
const WCHAR *tmp = (const WCHAR *)src;
int len, destindex;
if (size_bytes <= two_wchars)
{
buffer = malloc(sizeof(WCHAR));
*buffer = 0;
return buffer;
}
tmp_size = size_bytes - two_wchars; /* exclude both null terminators */
buffer = malloc(tmp_size * 2 + sizeof(WCHAR));
len = tmp_size / sizeof(WCHAR);
for (i = 0, destindex = 0; i < len; i++, destindex++)
{
if (tmp[i])
buffer[destindex] = tmp[i];
else
{
buffer[destindex++] = '\\';
buffer[destindex] = '0';
}
}
buffer[destindex] = 0;
break;
}
}
return buffer;
}
static const WCHAR *newlineW = L"\n";
static void output_value(const WCHAR *value_name, DWORD type, BYTE *data, DWORD data_size)
{
static const WCHAR *fmt = L" %1";
WCHAR defval[32];
WCHAR *reg_data;
if (value_name && value_name[0])
output_string(fmt, value_name);
else
{
LoadStringW(GetModuleHandleW(NULL), STRING_DEFAULT_VALUE, defval, ARRAY_SIZE(defval));
output_string(fmt, defval);
}
output_string(fmt, reg_type_to_wchar(type));
if (data)
{
reg_data = reg_data_to_wchar(type, data, data_size);
output_string(fmt, reg_data);
free(reg_data);
}
else
{
LoadStringW(GetModuleHandleW(NULL), STRING_VALUE_NOT_SET, defval, ARRAY_SIZE(defval));
output_string(fmt, defval);
}
output_string(newlineW);
}
static unsigned int num_values_found = 0;
static int query_value(HKEY hkey, WCHAR *value_name, WCHAR *path, BOOL recurse)
{
LONG rc;
DWORD max_data_bytes = 2048, data_size;
DWORD subkey_len;
DWORD type, path_len, i;
BYTE *data;
static const WCHAR *fmt = L"%1\n";
WCHAR *subkey_name, *subkey_path;
HKEY subkey;
data = malloc(max_data_bytes);
for (;;)
{
data_size = max_data_bytes;
rc = RegQueryValueExW(hkey, value_name, NULL, &type, data, &data_size);
if (rc == ERROR_MORE_DATA)
{
max_data_bytes = data_size;
data = realloc(data, max_data_bytes);
}
else break;
}
if (rc == ERROR_SUCCESS)
{
output_string(fmt, path);
output_value(value_name, type, data, data_size);
output_string(newlineW);
num_values_found++;
}
free(data);
if (!recurse)
{
if (rc == ERROR_FILE_NOT_FOUND)
{
if (value_name && *value_name)
{
output_message(STRING_VALUE_NONEXIST);
return 1;
}
output_string(fmt, path);
output_value(NULL, REG_SZ, NULL, 0);
}
return 0;
}
subkey_name = malloc(MAX_SUBKEY_LEN * sizeof(WCHAR));
path_len = lstrlenW(path);
i = 0;
for (;;)
{
subkey_len = MAX_SUBKEY_LEN;
rc = RegEnumKeyExW(hkey, i, subkey_name, &subkey_len, NULL, NULL, NULL, NULL);
if (rc == ERROR_SUCCESS)
{
subkey_path = build_subkey_path(path, path_len, subkey_name, subkey_len);
if (!RegOpenKeyExW(hkey, subkey_name, 0, KEY_READ, &subkey))
{
query_value(subkey, value_name, subkey_path, recurse);
RegCloseKey(subkey);
}
free(subkey_path);
i++;
}
else break;
}
free(subkey_name);
return 0;
}
static int query_all(HKEY hkey, WCHAR *path, BOOL recurse, BOOL recursing)
{
LONG rc;
DWORD num_subkeys, num_values;
DWORD max_value_len = 256, value_len;
DWORD max_data_bytes = 2048, data_size;
DWORD subkey_len;
DWORD i, type, path_len;
WCHAR *value_name, *subkey_name, *subkey_path;
BYTE *data;
HKEY subkey;
rc = RegQueryInfoKeyW(hkey, NULL, NULL, NULL, &num_subkeys, NULL,
NULL, &num_values, NULL, NULL, NULL, NULL);
if (rc) return 1;
if (num_values || recursing)
output_string(L"%1\n", path);
value_name = malloc(max_value_len * sizeof(WCHAR));
data = malloc(max_data_bytes);
i = 0;
for (;;)
{
value_len = max_value_len;
data_size = max_data_bytes;
rc = RegEnumValueW(hkey, i, value_name, &value_len, NULL, &type, data, &data_size);
if (rc == ERROR_SUCCESS)
{
output_value(value_name, type, data, data_size);
i++;
}
else if (rc == ERROR_MORE_DATA)
{
if (data_size > max_data_bytes)
{
max_data_bytes = data_size;
data = realloc(data, max_data_bytes);
}
else
{
max_value_len *= 2;
value_name = realloc(value_name, max_value_len * sizeof(WCHAR));
}
}
else break;
}
free(data);
free(value_name);
if (i || recursing)
output_string(newlineW);
if (!num_subkeys)
return 0;
subkey_name = malloc(MAX_SUBKEY_LEN * sizeof(WCHAR));
path_len = lstrlenW(path);
i = 0;
for (;;)
{
subkey_len = MAX_SUBKEY_LEN;
rc = RegEnumKeyExW(hkey, i, subkey_name, &subkey_len, NULL, NULL, NULL, NULL);
if (rc == ERROR_SUCCESS)
{
if (recurse)
{
subkey_path = build_subkey_path(path, path_len, subkey_name, subkey_len);
if (!RegOpenKeyExW(hkey, subkey_name, 0, KEY_READ, &subkey))
{
query_all(subkey, subkey_path, recurse, TRUE);
RegCloseKey(subkey);
}
free(subkey_path);
}
else output_string(L"%1\\%2\n", path, subkey_name);
i++;
}
else break;
}
free(subkey_name);
return 0;
}
static int run_query(HKEY root, WCHAR *path, WCHAR *key_name, WCHAR *value_name,
BOOL value_empty, BOOL recurse)
{
HKEY hkey;
int ret;
if (RegOpenKeyExW(root, path, 0, KEY_READ, &hkey) != ERROR_SUCCESS)
{
output_message(STRING_KEY_NONEXIST);
return 1;
}
output_string(newlineW);
if (value_name || value_empty)
{
ret = query_value(hkey, value_name, key_name, recurse);
if (recurse)
output_message(STRING_MATCHES_FOUND, num_values_found);
}
else
ret = query_all(hkey, key_name, recurse, FALSE);
RegCloseKey(hkey);
return ret;
}
int reg_query(int argc, WCHAR *argvW[])
{
HKEY root;
WCHAR *path, *key_name, *value_name = NULL;
BOOL value_empty = FALSE, recurse = FALSE;
int i;
if (!parse_registry_key(argvW[2], &root, &path))
return 1;
for (i = 3; i < argc; i++)
{
WCHAR *str;
if (argvW[i][0] != '/' && argvW[i][0] != '-')
goto invalid;
str = &argvW[i][1];
if (!lstrcmpiW(str, L"ve"))
{
if (value_empty) goto invalid;
value_empty = TRUE;
continue;
}
else if (!lstrcmpiW(str, L"reg:32") || !lstrcmpiW(str, L"reg:64"))
continue;
else if (!str[0] || str[1])
goto invalid;
switch (towlower(*str))
{
case 'v':
if (value_name || !(value_name = argvW[++i]))
goto invalid;
break;
case 's':
if (recurse) goto invalid;
recurse = TRUE;
break;
default:
goto invalid;
}
}
if (value_name && value_empty)
goto invalid;
key_name = get_long_key(root, path);
return run_query(root, path, key_name, value_name, value_empty, recurse);
invalid:
output_message(STRING_INVALID_SYNTAX);
output_message(STRING_FUNC_HELP, wcsupr(argvW[1]));
return 1;
}