mirror of
https://github.com/reactos/reactos.git
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[CMD] ASSOC: Simplify the code and make it more robust; fix returned ERRORLEVEL values.
- Make sure that non-administrator users can list associations, and display appropriate error messages when e.g. they don't have sufficient privileges to perform an operation. - Make the helper functions all return Win32 values, used as the ERRORVALUE, except when a specific extension association fails to be displayed, in which case the ERRORVALUE is normalized to 1. - Since the 'param' is a modifiable string (that can be modified by the command, independently of the way it's called), just use it to isolate the extension by zeroing out the equls-sign separator.
This commit is contained in:
Hermès Bélusca-Maïto
parent
63316df520
commit
141378cfc8
@ -13,187 +13,232 @@
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*
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* TODO:
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* - PrintAllAssociations could be optimized to not fetch all registry subkeys under 'Classes', just the ones that start with '.'
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* - Make sure that non-administrator users can list associations, and get appropriate error messages when they don't have sufficient
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* privileges to perform an operation.
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*/
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#include "precomp.h"
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#ifdef INCLUDE_CMD_ASSOC
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static INT
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PrintAssociation(
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IN LPCTSTR extension)
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static LONG
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PrintAssociationEx(
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IN HKEY hKeyClasses,
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IN PCTSTR pszExtension)
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{
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DWORD lRet;
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HKEY hKey = NULL, hSubKey = NULL;
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DWORD fileTypeLength = 0;
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LPTSTR fileType = NULL;
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LONG lRet;
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HKEY hKey;
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DWORD dwFileTypeLen = 0;
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PTSTR pszFileType;
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lRet = RegOpenKeyEx(HKEY_LOCAL_MACHINE, _T("SOFTWARE\\Classes"), 0, KEY_READ, &hKey);
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lRet = RegOpenKeyEx(hKeyClasses, pszExtension, 0, KEY_QUERY_VALUE, &hKey);
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if (lRet != ERROR_SUCCESS)
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return -1;
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{
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if (lRet != ERROR_FILE_NOT_FOUND)
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ErrorMessage(lRet, NULL);
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return lRet;
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}
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lRet = RegOpenKeyEx(hKey, extension, 0, KEY_READ, &hSubKey);
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/* Obtain the string length */
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lRet = RegQueryValueEx(hKey, NULL, NULL, NULL, NULL, &dwFileTypeLen);
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/* If there is no default value, don't display it */
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if (lRet == ERROR_FILE_NOT_FOUND)
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{
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RegCloseKey(hKey);
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return lRet;
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}
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if (lRet != ERROR_SUCCESS)
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{
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ErrorMessage(lRet, NULL);
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RegCloseKey(hKey);
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return lRet;
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}
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++dwFileTypeLen;
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pszFileType = cmd_alloc(dwFileTypeLen * sizeof(TCHAR));
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if (!pszFileType)
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{
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WARN("Cannot allocate memory for pszFileType!\n");
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RegCloseKey(hKey);
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return ERROR_NOT_ENOUGH_MEMORY;
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}
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/* Obtain the actual file type */
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lRet = RegQueryValueEx(hKey, NULL, NULL, NULL, (LPBYTE)pszFileType, &dwFileTypeLen);
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RegCloseKey(hKey);
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if (lRet != ERROR_SUCCESS)
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return 0;
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/* Obtain string length */
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lRet = RegQueryValueEx(hSubKey, NULL, NULL, NULL, NULL, &fileTypeLength);
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/* If there is no default value, don't display */
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if (lRet == ERROR_FILE_NOT_FOUND)
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{
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RegCloseKey(hSubKey);
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return 0;
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}
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if (lRet != ERROR_SUCCESS)
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{
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RegCloseKey(hSubKey);
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return -2;
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ErrorMessage(lRet, NULL);
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cmd_free(pszFileType);
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return lRet;
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}
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fileType = cmd_alloc(fileTypeLength * sizeof(TCHAR));
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if (!fileType)
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/* If there is a default key, display the relevant information */
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if (dwFileTypeLen != 0)
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{
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WARN("Cannot allocate memory for fileType!\n");
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RegCloseKey(hSubKey);
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return -2;
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ConOutPrintf(_T("%s=%s\n"), pszExtension, pszFileType);
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}
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/* Obtain actual file type */
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lRet = RegQueryValueEx(hSubKey, NULL, NULL, NULL, (LPBYTE)fileType, &fileTypeLength);
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RegCloseKey(hSubKey);
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if (lRet != ERROR_SUCCESS)
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{
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cmd_free(fileType);
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return -2;
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}
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/* If there is a default key, display relevant information */
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if (fileTypeLength != 0)
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{
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ConOutPrintf(_T("%s=%s\n"), extension, fileType);
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}
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cmd_free(fileType);
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return 1;
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cmd_free(pszFileType);
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return ERROR_SUCCESS;
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}
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static INT
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static LONG
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PrintAssociation(
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IN PCTSTR pszExtension)
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{
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LONG lRet;
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HKEY hKeyClasses;
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lRet = RegOpenKeyEx(HKEY_LOCAL_MACHINE, _T("SOFTWARE\\Classes"), 0,
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KEY_ENUMERATE_SUB_KEYS, &hKeyClasses);
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if (lRet != ERROR_SUCCESS)
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{
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ErrorMessage(lRet, NULL);
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return lRet;
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}
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lRet = PrintAssociationEx(hKeyClasses, pszExtension);
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RegCloseKey(hKeyClasses);
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return lRet;
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}
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static LONG
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PrintAllAssociations(VOID)
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{
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DWORD lRet = 0;
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HKEY hKey = NULL;
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DWORD numKeys = 0;
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LONG lRet;
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HKEY hKeyClasses;
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DWORD dwKeyCtr;
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DWORD dwNumKeys = 0;
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DWORD dwExtLen = 0;
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PTSTR pszExtName;
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DWORD extLength = 0;
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LPTSTR extName = NULL;
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DWORD keyCtr = 0;
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lRet = RegOpenKeyEx(HKEY_LOCAL_MACHINE, _T("SOFTWARE\\Classes"), 0, KEY_READ, &hKey);
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lRet = RegOpenKeyEx(HKEY_LOCAL_MACHINE, _T("SOFTWARE\\Classes"), 0,
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KEY_QUERY_VALUE | KEY_ENUMERATE_SUB_KEYS, &hKeyClasses);
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if (lRet != ERROR_SUCCESS)
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return -1;
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{
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ErrorMessage(lRet, NULL);
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return lRet;
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}
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lRet = RegQueryInfoKey(hKey, NULL, NULL, NULL, &numKeys, &extLength,
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lRet = RegQueryInfoKey(hKeyClasses, NULL, NULL, NULL, &dwNumKeys, &dwExtLen,
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NULL, NULL, NULL, NULL, NULL, NULL);
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if (lRet != ERROR_SUCCESS)
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{
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RegCloseKey(hKey);
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return -2;
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ErrorMessage(lRet, NULL);
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RegCloseKey(hKeyClasses);
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return lRet;
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}
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extLength++;
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extName = cmd_alloc(extLength * sizeof(TCHAR));
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if (!extName)
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++dwExtLen;
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pszExtName = cmd_alloc(dwExtLen * sizeof(TCHAR));
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if (!pszExtName)
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{
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WARN("Cannot allocate memory for extName!\n");
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RegCloseKey(hKey);
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return -2;
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WARN("Cannot allocate memory for pszExtName!\n");
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RegCloseKey(hKeyClasses);
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return ERROR_NOT_ENOUGH_MEMORY;
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}
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for (keyCtr = 0; keyCtr < numKeys; ++keyCtr)
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for (dwKeyCtr = 0; dwKeyCtr < dwNumKeys; ++dwKeyCtr)
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{
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DWORD dwBufSize = extLength;
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lRet = RegEnumKeyEx(hKey, keyCtr, extName, &dwBufSize,
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DWORD dwBufSize = dwExtLen;
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lRet = RegEnumKeyEx(hKeyClasses, dwKeyCtr, pszExtName, &dwBufSize,
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NULL, NULL, NULL, NULL);
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if (lRet == ERROR_SUCCESS || lRet == ERROR_MORE_DATA)
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{
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if (*extName == _T('.'))
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PrintAssociation(extName);
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/* Name starts with '.': this is an extension */
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if (*pszExtName == _T('.'))
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PrintAssociationEx(hKeyClasses, pszExtName);
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}
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else
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{
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cmd_free(extName);
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RegCloseKey(hKey);
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return -1;
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ErrorMessage(lRet, NULL);
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cmd_free(pszExtName);
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RegCloseKey(hKeyClasses);
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return lRet;
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}
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}
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RegCloseKey(hKey);
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RegCloseKey(hKeyClasses);
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cmd_free(extName);
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return numKeys;
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cmd_free(pszExtName);
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return ERROR_SUCCESS;
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}
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static INT
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static LONG
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AddAssociation(
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IN LPCTSTR extension,
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IN LPCTSTR type)
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IN PCTSTR pszExtension,
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IN PCTSTR pszType)
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{
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DWORD lRet;
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HKEY hKey = NULL, hSubKey = NULL;
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LONG lRet;
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HKEY hKeyClasses, hKey;
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lRet = RegOpenKeyEx(HKEY_LOCAL_MACHINE, _T("SOFTWARE\\Classes"), 0, KEY_ALL_ACCESS, &hKey);
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lRet = RegOpenKeyEx(HKEY_LOCAL_MACHINE, _T("SOFTWARE\\Classes"), 0,
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KEY_CREATE_SUB_KEY, &hKeyClasses);
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if (lRet != ERROR_SUCCESS)
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return -1;
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{
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ErrorMessage(lRet, NULL);
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return lRet;
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}
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lRet = RegCreateKeyEx(hKey, extension, 0, NULL, REG_OPTION_NON_VOLATILE,
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KEY_ALL_ACCESS, NULL, &hSubKey, NULL);
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lRet = RegCreateKeyEx(hKeyClasses, pszExtension, 0, NULL, REG_OPTION_NON_VOLATILE,
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KEY_SET_VALUE, NULL, &hKey, NULL);
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RegCloseKey(hKeyClasses);
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if (lRet != ERROR_SUCCESS)
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{
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ErrorMessage(lRet, NULL);
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return lRet;
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}
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lRet = RegSetValueEx(hKey, NULL, 0, REG_SZ,
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(LPBYTE)pszType, (DWORD)(_tcslen(pszType) + 1) * sizeof(TCHAR));
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RegCloseKey(hKey);
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if (lRet != ERROR_SUCCESS)
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return -1;
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{
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ErrorMessage(lRet, NULL);
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return lRet;
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}
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lRet = RegSetValueEx(hSubKey, NULL, 0, REG_SZ,
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(LPBYTE)type, (_tcslen(type) + 1) * sizeof(TCHAR));
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RegCloseKey(hSubKey);
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if (lRet != ERROR_SUCCESS)
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return -2;
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return 0;
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return ERROR_SUCCESS;
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}
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static INT
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static LONG
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RemoveAssociation(
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IN LPCTSTR extension)
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IN PCTSTR pszExtension)
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{
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DWORD lRet;
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HKEY hKey;
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LONG lRet;
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HKEY hKeyClasses;
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lRet = RegOpenKeyEx(HKEY_LOCAL_MACHINE, _T("SOFTWARE\\Classes"), 0, KEY_ALL_ACCESS, &hKey);
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lRet = RegOpenKeyEx(HKEY_LOCAL_MACHINE, _T("SOFTWARE\\Classes"), 0,
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KEY_QUERY_VALUE, &hKeyClasses);
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if (lRet != ERROR_SUCCESS)
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return -1;
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{
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ErrorMessage(lRet, NULL);
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return lRet;
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}
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lRet = RegDeleteKey(hKey, extension);
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RegCloseKey(hKey);
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lRet = RegDeleteKey(hKeyClasses, pszExtension);
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RegCloseKey(hKeyClasses);
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if (lRet != ERROR_SUCCESS)
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return -2;
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{
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if (lRet != ERROR_FILE_NOT_FOUND)
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ErrorMessage(lRet, NULL);
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return lRet;
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}
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return 0;
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return ERROR_SUCCESS;
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}
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INT CommandAssoc(LPTSTR param)
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{
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INT retval = 0;
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LPTSTR lpEqualSign;
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PTCHAR pEqualSign;
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/* Print help */
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if (!_tcsncmp(param, _T("/?"), 2))
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@ -202,53 +247,51 @@ INT CommandAssoc(LPTSTR param)
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return 0;
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}
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if (_tcslen(param) == 0)
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/* Print all associations if no parameter has been specified */
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if (!*param)
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{
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PrintAllAssociations();
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goto Quit;
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}
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lpEqualSign = _tcschr(param, _T('='));
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if (lpEqualSign != NULL)
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pEqualSign = _tcschr(param, _T('='));
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if (pEqualSign != NULL)
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{
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LPTSTR fileType = lpEqualSign + 1;
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LPTSTR extension = cmd_alloc((lpEqualSign - param + 1) * sizeof(TCHAR));
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if (!extension)
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{
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WARN("Cannot allocate memory for extension!\n");
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error_out_of_memory();
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retval = 1;
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goto Quit;
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}
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PTSTR pszFileType = pEqualSign + 1;
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_tcsncpy(extension, param, lpEqualSign - param);
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extension[lpEqualSign - param] = _T('\0');
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/* NULL-terminate at the equals sign */
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*pEqualSign = 0;
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/* If the equal sign is the last character
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* in the string, then delete the key. */
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if (_tcslen(fileType) == 0)
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/* If the equals sign is the last character
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* in the string, delete the association. */
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if (*pszFileType == 0)
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{
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retval = RemoveAssociation(extension);
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retval = RemoveAssociation(param);
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}
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else
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/* Otherwise, add the key and print out the association */
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/* Otherwise, add the association and print it out */
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{
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retval = AddAssociation(extension, fileType);
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PrintAssociation(extension);
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retval = AddAssociation(param, pszFileType);
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PrintAssociation(param);
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}
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cmd_free(extension);
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if (retval)
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retval = 1; /* Fixup the error value */
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if (retval != ERROR_SUCCESS)
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{
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if (retval != ERROR_FILE_NOT_FOUND)
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{
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// FIXME: Localize
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ConErrPrintf(_T("Error occurred while processing: %s.\n"), param);
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}
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// retval = 1; /* Fixup the error value */
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}
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}
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else
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{
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/* No equal sign, print all associations */
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/* No equals sign, print the association */
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retval = PrintAssociation(param);
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if (retval == 0) /* If nothing printed out */
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if (retval != ERROR_SUCCESS)
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{
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ConOutResPrintf(STRING_ASSOC_ERROR, param);
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ConErrResPrintf(STRING_ASSOC_ERROR, param);
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retval = 1; /* Fixup the error value */
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}
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}
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