[jmorlan] 41808: In cmd: free all memory before exiting to prevent "memory leak" messages (bug 4510). Also, CMD /? should exit with a code of 1 instead of 0.

Author: jmorlan
Date: Wed Jul  8 21:28:21 2009
New Revision: 41808
URL: http://svn.reactos.org/svn/reactos?rev=41808&view=rev
Log:
In cmd: free all memory before exiting to prevent "memory leak" messages (bug
4510). Also, CMD /? should exit with a code of 1 instead of 0.
Modified:
    trunk/reactos/base/shell/cmd/cmd.c
Modified: trunk/reactos/base/shell/cmd/cmd.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/base/shell/cmd/cmd.c?rev=4…
==============================================================================
--- trunk/reactos/base/shell/cmd/cmd.c [iso-8859-1] (original)
+++ trunk/reactos/base/shell/cmd/cmd.c [iso-8859-1] Wed Jul  8 21:28:21 2009
@@ -739,42 +739,22 @@
        return Ret;
 }
-BOOL
-GrowIfNecessary_dbg ( UINT needed, LPTSTR* ret, UINT* retlen, const char *file, int line
)
-{
-       if ( *ret && needed < *retlen )
-               return TRUE;
-       *retlen = needed;
-       if ( *ret )
-               cmd_free ( *ret );
-#ifdef _DEBUG_MEM
-       *ret = (LPTSTR)cmd_alloc_dbg ( *retlen * sizeof(TCHAR), file, line );
-#else
-       *ret = (LPTSTR)cmd_alloc ( *retlen * sizeof(TCHAR) );
-#endif
-       if ( !*ret )
-               SetLastError ( ERROR_OUTOFMEMORY );
-       return *ret != NULL;
-}
-#define GrowIfNecessary(x, y, z) GrowIfNecessary_dbg(x, y, z, __FILE__, __LINE__)
-
 LPTSTR
 GetEnvVar(LPCTSTR varName)
 {
        static LPTSTR ret = NULL;
-       static UINT retlen = 0;
        UINT size;
-       size = GetEnvironmentVariable ( varName, ret, retlen );
-       if ( size > retlen )
-       {
-               if ( !GrowIfNecessary ( size, &ret, &retlen ) )
-                       return NULL;
-               size = GetEnvironmentVariable ( varName, ret, retlen );
-       }
-       if ( size )
-               return ret;
-       return NULL;
+       cmd_free(ret);
+       ret = NULL;
+       size = GetEnvironmentVariable(varName, NULL, 0);
+       if (size > 0)
+       {
+               ret = cmd_alloc(size * sizeof(TCHAR));
+               if (ret != NULL)
+                       GetEnvironmentVariable(varName, ret, size + 1);
+       }
+       return ret;
 }
 LPCTSTR
@@ -1636,9 +1616,6 @@
                NtReadVirtualMemoryPtr =
(NtReadVirtualMemoryProc)GetProcAddress(NtDllModule, "NtReadVirtualMemory");
        }
-       cmdLine = GetCommandLine();
-       TRACE ("[command args: %s]\n", debugstr_aw(cmdLine));
-
        InitLocale ();
        /* get default input and output console handles */
@@ -1652,8 +1629,31 @@
        if (GetEnvironmentVariable(_T("PROMPT"),lpBuffer, sizeof(lpBuffer) /
sizeof(lpBuffer[0])) == 0)
            SetEnvironmentVariable (_T("PROMPT"), _T("$P$G"));
+#ifdef FEATURE_DIR_STACK
+       /* initialize directory stack */
+       InitDirectoryStack ();
+#endif
+
+#ifdef FEATURE_HISTORY
+       /*initialize history*/
+       InitHistory();
+#endif
+
+       /* Set COMSPEC environment variable */
+       if (0 != GetModuleFileName (NULL, ModuleName, _MAX_PATH + 1))
+       {
+               ModuleName[_MAX_PATH] = _T('\0');
+               SetEnvironmentVariable (_T("COMSPEC"), ModuleName);
+       }
+
+       /* add ctrl break handler */
+       AddBreakHandler ();
+
        SetConsoleMode (hIn, ENABLE_PROCESSED_INPUT);
+
+       cmdLine = GetCommandLine();
+       TRACE ("[command args: %s]\n", debugstr_aw(cmdLine));
        for (ptr = cmdLine; *ptr; ptr++)
        {
@@ -1663,7 +1663,9 @@
                        if (option == _T('?'))
                        {
                                ConOutResPaging(TRUE,STRING_CMD_HELP8);
-                               cmd_exit(0);
+                               nErrorLevel = 1;
+                               bExit = TRUE;
+                               return;
                        }
                        else if (option == _T('P'))
                        {
@@ -1731,27 +1733,6 @@
                ConOutPuts(_T("(C) Copyright 1998-") _T(COPYRIGHT_YEAR)
_T(" ReactOS Team."));
        }
-#ifdef FEATURE_DIR_STACK
-       /* initialize directory stack */
-       InitDirectoryStack ();
-#endif
-
-
-#ifdef FEATURE_HISTORY
-       /*initialize history*/
-       InitHistory();
-#endif
-
-       /* Set COMSPEC environment variable */
-       if (0 != GetModuleFileName (NULL, ModuleName, _MAX_PATH + 1))
-       {
-               ModuleName[_MAX_PATH] = _T('\0');
-               SetEnvironmentVariable (_T("COMSPEC"), ModuleName);
-       }
-
-       /* add ctrl break handler */
-       AddBreakHandler ();
-
        if (AutoRun)
        {
                ExecuteAutoRunFile(HKEY_LOCAL_MACHINE);
@@ -1796,6 +1777,8 @@
        CleanHistory();
 #endif
+       /* free GetEnvVar's buffer */
+       GetEnvVar(NULL);
        /* remove ctrl break handler */
        RemoveBreakHandler ();