start.c

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/*
 *  START.C - start internal command.
 *
 *
 *  History:
 *
 *    24-Jul-1999 (Eric Kohl)
 *        Started.
 *
 *    30-Apr-2005 (Magnus Olsen <magnus@greatlord.com>)
 *        Remove all hardcoded strings in En.rc
 */

#include "precomp.h"

#ifdef INCLUDE_CMD_START

/* Find the end of an option, and turn it into a nul-terminated string
 * in place. (It's moved back one character, to make room for the nul) */
static TCHAR *GetParameter(TCHAR **pPointer)
{
    BOOL bInQuote = FALSE;
    TCHAR *start = *pPointer;
    TCHAR *p;
    for (p = start; *p; p++)
    {
        if (!bInQuote && (*p == _T('/') || _istspace(*p)))
            break;
        bInQuote ^= (*p == _T('"'));
        p[-1] = *p;
    }
    p[-1] = _T('\0');
    *pPointer = p;
    return start - 1;
}

INT cmd_start (LPTSTR Rest)
{
    TCHAR szFullName[CMDLINE_LENGTH];
    TCHAR szUnquotedName[CMDLINE_LENGTH];
    TCHAR *param = NULL;
    TCHAR *dot;
    INT size;
    LPTSTR comspec;
    BOOL bWait = FALSE;
    BOOL bBat  = FALSE;
    BOOL bCreate = FALSE;
    TCHAR szFullCmdLine[CMDLINE_LENGTH];
    PROCESS_INFORMATION prci;
    STARTUPINFO stui;
#ifdef UNICODE
    DWORD dwCreationFlags = CREATE_NEW_CONSOLE | CREATE_UNICODE_ENVIRONMENT;
#else
    DWORD dwCreationFlags = CREATE_NEW_CONSOLE;
#endif
    DWORD dwAffinityMask = 0;
    LPTSTR lpTitle = NULL;
    LPTSTR lpDirectory = NULL;
    LPTSTR lpEnvironment = NULL;
    WORD wShowWindow = SW_SHOWNORMAL;

    while (1)
    {
        if (_istspace(*Rest))
        {
            Rest++;
        }
        else if (*Rest == _T('"') && !lpTitle)
        {
            lpTitle = GetParameter(&Rest);
            StripQuotes(lpTitle);
        }
        else if (*Rest == _T('/'))
        {
            LPTSTR option;
            Rest++;
            option = GetParameter(&Rest);
            if (*option == _T('?'))
            {
                ConOutResPaging(TRUE,STRING_START_HELP1);
                return 0;
            }
            else if (_totupper(*option) == _T('D'))
            {
                lpDirectory = option + 1;
                if (!*lpDirectory)
                {
                    while (_istspace(*Rest))
                        Rest++;
                    lpDirectory = GetParameter(&Rest);
                }
                StripQuotes(lpDirectory);
            }
            else if (_totupper(*option) == _T('I'))
            {
                /* rest of the option is apparently ignored */
                lpEnvironment = lpOriginalEnvironment;
            }
            else if (!_tcsicmp(option, _T("MIN")))
            {
                wShowWindow = SW_MINIMIZE;
            }
            else if (!_tcsicmp(option, _T("MAX")))
            {
                wShowWindow = SW_MAXIMIZE;
            }
            else if (!_tcsicmp(option, _T("AFFINITY")))
            {
                TCHAR *end;
                while (_istspace(*Rest))
                    Rest++;
                option = GetParameter(&Rest);
                /* Affinity mask is given in hexadecimal */
                dwAffinityMask = _tcstoul(option, &end, 16);
                if (*end != _T('\0') || dwAffinityMask == 0 ||
                    dwAffinityMask == (DWORD)-1)
                {
                    ConErrResPrintf(STRING_ERROR_INVALID_PARAM_FORMAT, option);
                    return 1;
                }
                dwCreationFlags |= CREATE_SUSPENDED;
            }
            else if (!_tcsicmp(option, _T("B")))
            {
                dwCreationFlags &= ~CREATE_NEW_CONSOLE;
                dwCreationFlags |= CREATE_NEW_PROCESS_GROUP;
            }
            else if (!_tcsicmp(option, _T("LOW")))
            {
                dwCreationFlags |= IDLE_PRIORITY_CLASS;
            }
            else if (!_tcsicmp(option, _T("NORMAL")))
            {
                dwCreationFlags |= NORMAL_PRIORITY_CLASS;
            }
            else if (!_tcsicmp(option, _T("HIGH")))
            {
                dwCreationFlags |= HIGH_PRIORITY_CLASS;
            }
            else if (!_tcsicmp(option, _T("REALTIME")))
            {
                dwCreationFlags |= REALTIME_PRIORITY_CLASS;
            }
            else if (!_tcsicmp(option, _T("ABOVENORMAL")))
            {
                dwCreationFlags |= ABOVE_NORMAL_PRIORITY_CLASS;
            }
            else if (!_tcsicmp(option, _T("BELOWNORMAL")))
            {
                dwCreationFlags |= BELOW_NORMAL_PRIORITY_CLASS;
            }
            else if (!_tcsicmp(option, _T("SEPARATE")))
            {
                dwCreationFlags |= CREATE_SEPARATE_WOW_VDM;
            }
            else if (!_tcsicmp(option, _T("SHARED")))
            {
                dwCreationFlags |= CREATE_SHARED_WOW_VDM;
            }
            else if (!_tcsicmp(option, _T("W")) ||
                     !_tcsicmp(option, _T("WAIT")))
            {
                bWait = TRUE;
            }
            else
            {
                ConErrResPrintf(STRING_TYPE_ERROR1, option);
                return 0;
            }
        }
        else
        {
            /* It's not an option - must be the beginning of
             * the actual command. Leave the loop. */
            break;
        }
    }

    /* get comspec */
    comspec = cmd_alloc ( MAX_PATH * sizeof(TCHAR));
    if (!comspec)
    {
        WARN("Cannot allocate memory for start comspec!\n");
        error_out_of_memory();
        return 1;
    }
    SetLastError(0);
    size = GetEnvironmentVariable (_T("COMSPEC"), comspec, MAX_PATH);
    if (GetLastError() == ERROR_ENVVAR_NOT_FOUND)
    {
        _tcscpy(comspec, _T("cmd"));
    }
    else
    {
        if (size > MAX_PATH)
        {
            LPTSTR Oldcomspec = comspec;
            comspec = cmd_realloc(comspec,size * sizeof(TCHAR) );
            if (comspec==NULL)
            {
                cmd_free(Oldcomspec);
                return 1;
            }
            size = GetEnvironmentVariable (_T("COMSPEC"), comspec, size);
        }
    }

    nErrorLevel = 0;

    if (!*Rest)
    {
        Rest = _T("cmd.exe");
    }
    else
    /* Parsing the command that gets called by start, and it's parameters */
    {
        BOOL bInside = FALSE;
        INT i;
        /* find the end of the command and put the arguments in param */
        for (i = 0; Rest[i]; i++)
        {
            if (Rest[i] == _T('\"'))
                bInside = !bInside;
            if (_istspace(Rest[i]) && !bInside)
            {
                param = &Rest[i+1];
                Rest[i] = _T('\0');
                break;
            }
        }
    }

    _tcscpy(szUnquotedName, Rest);
    StripQuotes(szUnquotedName);

    /* get the PATH environment variable and parse it */
    /* search the PATH environment variable for the binary */
    if (SearchForExecutable(szUnquotedName, szFullName))
    {
        /* check if this is a .BAT or .CMD file */
        dot = _tcsrchr(szFullName, _T('.'));
        if (dot && (!_tcsicmp(dot, _T(".bat")) || !_tcsicmp(dot, _T(".cmd"))))
        {
            bBat = TRUE;
            _stprintf(szFullCmdLine, _T("\"%s\" /K %s"), comspec, Rest);
            TRACE ("[BATCH: %s %s]\n", debugstr_aw(szFullName), debugstr_aw(Rest));
        }
        else
        {
            TRACE ("[EXEC: %s %s]\n", debugstr_aw(szFullName), debugstr_aw(Rest));
            _tcscpy(szFullCmdLine, szFullName);
        }

        /* build command line for CreateProcess() */
        if (param != NULL)
        {
            _tcsncat(szFullCmdLine, _T(" "), CMDLINE_LENGTH - _tcslen(szFullCmdLine));
            _tcsncat(szFullCmdLine, param, CMDLINE_LENGTH - _tcslen(szFullCmdLine));
        }

        /* fill startup info */
        memset (&stui, 0, sizeof (STARTUPINFO));
        stui.cb = sizeof (STARTUPINFO);
        stui.dwFlags = STARTF_USESHOWWINDOW;
        stui.lpTitle = lpTitle;
        stui.wShowWindow = wShowWindow;

        bCreate = CreateProcess(bBat ? comspec : szFullName,
                                szFullCmdLine, NULL, NULL, TRUE, dwCreationFlags,
                                lpEnvironment, lpDirectory, &stui, &prci);
        if (bCreate)
        {
            if (dwAffinityMask)
            {
                SetProcessAffinityMask(prci.hProcess, dwAffinityMask);
                ResumeThread(prci.hThread);
            }
            CloseHandle(prci.hThread);
        }
    }
    else
    {
        /* The file name did not seem to be valid, but maybe it's actually a
         * directory or URL, so we still want to pass it to ShellExecute. */
        _tcscpy(szFullName, szUnquotedName);
    }

    if (!bCreate)
    {
        /* CreateProcess didn't work; try ShellExecute */
        DWORD flags = SEE_MASK_NOCLOSEPROCESS;
        if (!(dwCreationFlags & CREATE_NEW_CONSOLE))
            flags |= SEE_MASK_NO_CONSOLE;
        prci.hProcess = RunFile(flags, szFullName, param, lpDirectory, wShowWindow);
    }

    if (prci.hProcess != NULL)
    {
        if (bWait)
        {
            DWORD dwExitCode;
            WaitForSingleObject (prci.hProcess, INFINITE);
            GetExitCodeProcess (prci.hProcess, &dwExitCode);
            nErrorLevel = (INT)dwExitCode;
        }
        CloseHandle (prci.hProcess);

        /* Update the local code page cache */
        {
            UINT uNewInputCodePage  = GetConsoleCP();
            UINT uNewOutputCodePage = GetConsoleOutputCP();

            if ((InputCodePage  != uNewInputCodePage) ||
                (OutputCodePage != uNewOutputCodePage))
            {
                InputCodePage  = uNewInputCodePage;
                OutputCodePage = uNewOutputCodePage;

                /* Reset the current thread UI language */
                if (IsConsoleHandle(ConStreamGetOSHandle(StdOut)) ||
                    IsConsoleHandle(ConStreamGetOSHandle(StdErr)))
                {
                    ConSetThreadUILanguage(0);
                }
                /* Update the streams cached code page */
                ConStdStreamsSetCacheCodePage(InputCodePage, OutputCodePage);

                /* Update the locale as well */
                InitLocale();
            }
        }
    }
    else
    {
        ErrorMessage(GetLastError (),
                      _T("Error executing CreateProcess()!!\n"));
    }

    cmd_free(comspec);
    return 0;
}

#endif

/* EOF */