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cmake/Source/cmWin32ProcessExecution.cxx

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/*=========================================================================
Program: CMake - Cross-Platform Makefile Generator
Module: $RCSfile: cmWin32ProcessExecution.cxx,v $
Language: C++
Date: $Date: 2007-09-27 18:16:20 $
Version: $Revision: 1.32 $
Copyright (c) 2002 Kitware, Inc., Insight Consortium. All rights reserved.
See Copyright.txt or http://www.cmake.org/HTML/Copyright.html for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#include "cmWin32ProcessExecution.h"
#include "cmSystemTools.h"
#include <malloc.h>
#include <io.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <windows.h>
#if defined(__BORLANDC__)
# define STRICMP stricmp
# define TO_INTPTR(x) ((long)(x))
#else // Visual studio
# if ( _MSC_VER >= 1300 )
# include <stddef.h>
# define TO_INTPTR(x) ((intptr_t)(x))
# else // Visual Studio 6
# define TO_INTPTR(x) ((long)(x))
# endif // Visual studio .NET
# define STRICMP _stricmp
#endif // Borland
#define POPEN_1 1
#define POPEN_2 2
#define POPEN_3 3
#define POPEN_4 4
#define cmMAX(x,y) (((x)<(y))?(y):(x))
void DisplayErrorMessage()
{
LPVOID lpMsgBuf;
FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
GetLastError(),
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
(LPTSTR) &lpMsgBuf,
0,
NULL
);
// Process any inserts in lpMsgBuf.
// ...
// Display the string.
MessageBox( NULL, (LPCTSTR)lpMsgBuf, "Error", MB_OK | MB_ICONINFORMATION );
// Free the buffer.
LocalFree( lpMsgBuf );
}
// Code from a Borland web site with the following explaination :
/* In this article, I will explain how to spawn a console application
* and redirect its standard input/output using anonymous pipes. An
* anonymous pipe is a pipe that goes only in one direction (read
* pipe, write pipe, etc.). Maybe you are asking, "why would I ever
* need to do this sort of thing?" One example would be a Windows
* telnet server, where you spawn a shell and listen on a port and
* send and receive data between the shell and the socket
* client. (Windows does not really have a built-in remote
* shell). First, we should talk about pipes. A pipe in Windows is
* simply a method of communication, often between process. The SDK
* defines a pipe as "a communication conduit with two ends;
a process
* with a handle to one end can communicate with a process having a
* handle to the other end." In our case, we are using "anonymous"
* pipes, one-way pipes that "transfer data between a parent process
* and a child process or between two child processes of the same
* parent process." It's easiest to imagine a pipe as its namesake. An
* actual pipe running between processes that can carry data. We are
* using anonymous pipes because the console app we are spawning is a
* child process. We use the CreatePipe function which will create an
* anonymous pipe and return a read handle and a write handle. We will
* create two pipes, on for stdin and one for stdout. We will then
* monitor the read end of the stdout pipe to check for display on our
* child process. Every time there is something availabe for reading,
* we will display it in our app. Consequently, we check for input in
* our app and send it off to the write end of the stdin pipe. */
inline bool IsWinNT()
//check if we're running NT
{
OSVERSIONINFO osv;
osv.dwOSVersionInfoSize = sizeof(osv);
GetVersionEx(&osv);
return (osv.dwPlatformId == VER_PLATFORM_WIN32_NT);
}
//---------------------------------------------------------------------------
bool cmWin32ProcessExecution::BorlandRunCommand(
const char* command, const char* dir,
std::string& output, int& retVal, bool verbose, int /* timeout */,
bool hideWindows)
{
//verbose = true;
//std::cerr << std::endl
// << "WindowsRunCommand(" << command << ")" << std::endl
// << std::flush;
const int BUFFER_SIZE = 4096;
char buf[BUFFER_SIZE];
//i/o buffer
STARTUPINFO si;
SECURITY_ATTRIBUTES sa;
SECURITY_DESCRIPTOR sd;
//security information for pipes
PROCESS_INFORMATION pi;
HANDLE newstdin,newstdout,read_stdout,write_stdin;
//pipe handles
if (IsWinNT())
//initialize security descriptor (Windows NT)
{
InitializeSecurityDescriptor(&sd,SECURITY_DESCRIPTOR_REVISION);
SetSecurityDescriptorDacl(&sd, true, NULL, false);
sa.lpSecurityDescriptor = &sd;
}
else sa.lpSecurityDescriptor = NULL;
sa.nLength = sizeof(SECURITY_ATTRIBUTES);
sa.bInheritHandle = true;
//allow inheritable handles
if (!CreatePipe(&newstdin,&write_stdin,&sa,0))
//create stdin pipe
{
return false;
}
if (!CreatePipe(&read_stdout,&newstdout,&sa,0))
//create stdout pipe
{
CloseHandle(newstdin);
CloseHandle(write_stdin);
return false;
}
GetStartupInfo(&si);
//set startupinfo for the spawned process
/* The dwFlags member tells CreateProcess how to make the
* process. STARTF_USESTDHANDLES validates the hStd*
* members. STARTF_USESHOWWINDOW validates the wShowWindow
* member. */
si.cb = sizeof(STARTUPINFO);
si.dwFlags = STARTF_USESTDHANDLES|STARTF_USESHOWWINDOW;
si.hStdOutput = newstdout;
si.hStdError = newstdout;
si.wShowWindow = SW_SHOWDEFAULT;
if(hideWindows)
{
si.wShowWindow = SW_HIDE;
}
//set the new handles for the child process si.hStdInput = newstdin;
char* commandAndArgs = strcpy(new char[strlen(command)+1], command);
if (!CreateProcess(NULL,commandAndArgs,NULL,NULL,TRUE,
0, // CREATE_NEW_CONSOLE,
NULL,dir,&si,&pi))
{
std::cerr << "CreateProcess failed " << commandAndArgs << std::endl;
CloseHandle(newstdin);
CloseHandle(newstdout);
CloseHandle(read_stdout);
CloseHandle(write_stdin);
delete [] commandAndArgs;
return false;
}
delete [] commandAndArgs;
unsigned long exit=0;
//process exit code unsigned
unsigned long bread;
//bytes read unsigned
unsigned long avail;
//bytes available
memset(buf, 0, sizeof(buf));
for(;;)
//main program loop
{
Sleep(10);
//check to see if there is any data to read from stdout
//std::cout << "Peek for data..." << std::endl;
PeekNamedPipe(read_stdout,buf,1023,&bread,&avail,NULL);
if (bread != 0)
{
memset(buf, 0, sizeof(buf));
if (avail > 1023)
{
while (bread >= 1023)
{
//std::cout << "Read data..." << std::endl;
ReadFile(read_stdout,buf,1023,&bread,NULL);
//read the stdout pipe
memset(buf, 0, sizeof(buf));
output += buf;
if (verbose)
{
cmSystemTools::Stdout(buf);
}
}
}
else
{
ReadFile(read_stdout,buf,1023,&bread,NULL);
output += buf;
if(verbose)
{
cmSystemTools::Stdout(buf);
}
}
}
//std::cout << "Check for process..." << std::endl;
GetExitCodeProcess(pi.hProcess,&exit);
//while the process is running
if (exit != STILL_ACTIVE) break;
}
WaitForSingleObject(pi.hProcess, INFINITE);
GetExitCodeProcess(pi.hProcess,&exit);
CloseHandle(pi.hThread);
CloseHandle(pi.hProcess);
CloseHandle(newstdin);
//clean stuff up
CloseHandle(newstdout);
CloseHandle(read_stdout);
CloseHandle(write_stdin);
retVal = exit;
return true;
}
bool cmWin32ProcessExecution::StartProcess(
const char* cmd, const char* path, bool verbose)
{
this->Initialize();
this->Verbose = verbose;
return this->PrivateOpen(cmd, path, _O_RDONLY | _O_TEXT, POPEN_3);
}
bool cmWin32ProcessExecution::Wait(int timeout)
{
return this->PrivateClose(timeout);
}
/*
* Internal dictionary mapping popen* file pointers to process handles,
* for use when retrieving the process exit code. See _PyPclose() below
* for more information on this dictionary's use.
*/
static void *_PyPopenProcs = NULL;
static BOOL RealPopenCreateProcess(const char *cmdstring,
const char *path,
const char *szConsoleSpawn,
HANDLE hStdin,
HANDLE hStdout,
HANDLE hStderr,
HANDLE *hProcess,
bool hideWindows,
std::string& output)
{
PROCESS_INFORMATION piProcInfo;
STARTUPINFO siStartInfo;
char *s1=0,*s2=0, *s3 = " /c ";
int i = GetEnvironmentVariable("COMSPEC",NULL,0);
if (i)
{
char *comshell;
s1 = (char *)malloc(i);
int x = GetEnvironmentVariable("COMSPEC", s1, i);
if (!x)
{
free(s1);
return x;
}
/* Explicitly check if we are using COMMAND.COM. If we are
* then use the w9xpopen hack.
*/
comshell = s1 + x;
while (comshell >= s1 && *comshell != '\\')
--comshell;
++comshell;
if (GetVersion() < 0x80000000 &&
STRICMP(comshell, "command.com") != 0)
{
/* NT/2000 and not using command.com. */
x = i + (int)strlen(s3) + (int)strlen(cmdstring) + 1;
s2 = (char *)malloc(x);
ZeroMemory(s2, x);
//sprintf(s2, "%s%s%s", s1, s3, cmdstring);
sprintf(s2, "%s", cmdstring);
}
else
{
/*
* Oh gag, we're on Win9x or using COMMAND.COM. Use
* the workaround listed in KB: Q150956
*/
char modulepath[_MAX_PATH];
struct stat statinfo;
GetModuleFileName(NULL, modulepath, sizeof(modulepath));
for (i = x = 0; modulepath[i]; i++)
if (modulepath[i] == '\\')
x = i+1;
modulepath[x] = '\0';
/* Create the full-name to w9xpopen, so we can test it exists */
strncat(modulepath,
szConsoleSpawn,
(sizeof(modulepath)/sizeof(modulepath[0]))
-strlen(modulepath));
if (stat(modulepath, &statinfo) != 0)
{
/* Eeek - file-not-found - possibly an embedding
situation - see if we can locate it in sys.prefix
*/
strncpy(modulepath,
".",
sizeof(modulepath)/sizeof(modulepath[0]));
if (modulepath[strlen(modulepath)-1] != '\\')
strcat(modulepath, "\\");
strncat(modulepath,
szConsoleSpawn,
(sizeof(modulepath)/sizeof(modulepath[0]))
-strlen(modulepath));
/* No where else to look - raise an easily identifiable
error, rather than leaving Windows to report
"file not found" - as the user is probably blissfully
unaware this shim EXE is used, and it will confuse them.
(well, it confused me for a while ;-)
*/
if (stat(modulepath, &statinfo) != 0)
{
std::cout
<< "Can not locate '" << modulepath
<< "' which is needed "
"for popen to work with your shell "
"or platform." << std::endl;
free(s1);
free(s2);
return FALSE;
}
}
x = i + (int)strlen(s3) + (int)strlen(cmdstring) + 1 +
(int)strlen(modulepath) +
(int)strlen(szConsoleSpawn) + 1;
if(s2)
{
free(s2);
}
s2 = (char *)malloc(x);
ZeroMemory(s2, x);
sprintf(
s2,
"%s %s%s%s",
modulepath,
s1,
s3,
cmdstring);
sprintf(
s2,
"%s %s",
modulepath,
cmdstring);
}
}
/* Could be an else here to try cmd.exe / command.com in the path
Now we'll just error out.. */
else
{
std::cout << "Cannot locate a COMSPEC environment variable to "
<< "use as the shell" << std::endl;
free(s2);
free(s1);
return FALSE;
}
ZeroMemory(&siStartInfo, sizeof(STARTUPINFO));
siStartInfo.cb = sizeof(STARTUPINFO);
siStartInfo.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;
siStartInfo.hStdInput = hStdin;
siStartInfo.hStdOutput = hStdout;
siStartInfo.hStdError = hStderr;
siStartInfo.wShowWindow = SW_SHOWDEFAULT;
if(hideWindows)
{
siStartInfo.wShowWindow = SW_HIDE;
}
//std::cout << "Create process: " << s2 << std::endl;
if (CreateProcess(NULL,
s2,
NULL,
NULL,
TRUE,
0, //CREATE_NEW_CONSOLE,
NULL,
path,
&siStartInfo,
&piProcInfo) )
{
/* Close the handles now so anyone waiting is woken. */
CloseHandle(piProcInfo.hThread);
/* Return process handle */
*hProcess = piProcInfo.hProcess;
//std::cout << "Process created..." << std::endl;
free(s2);
free(s1);
return TRUE;
}
output += "CreateProcessError: ";
{
/* Format the error message. */
char message[1024];
DWORD original = GetLastError();
DWORD length = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS, 0, original,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
message, 1023, 0);
if(length < 1)
{
/* FormatMessage failed. Use a default message. */
_snprintf(message, 1023,
"Process execution failed with error 0x%X. "
"FormatMessage failed with error 0x%X",
original, GetLastError());
}
output += message;
}
output += "\n";
output += "for command: ";
output += s2;
if(path)
{
output += "\nin dir: ";
output += path;
}
output += "\n";
free(s2);
free(s1);
return FALSE;
}
/* The following code is based off of KB: Q190351 */
bool cmWin32ProcessExecution::PrivateOpen(const char *cmdstring,
const char* path,
int mode,
int n)
{
HANDLE hProcess;
SECURITY_ATTRIBUTES saAttr;
BOOL fSuccess;
int fd1, fd2, fd3;
this->hChildStdinRd = 0;
this->hChildStdinWr = 0;
this->hChildStdoutRd = 0;
this->hChildStdoutWr = 0;
this->hChildStderrRd = 0;
this->hChildStderrWr = 0;
this->hChildStdinWrDup = 0;
this->hChildStdoutRdDup = 0;
this->hChildStderrRdDup = 0;
saAttr.nLength = sizeof(SECURITY_ATTRIBUTES);
saAttr.bInheritHandle = TRUE;
saAttr.lpSecurityDescriptor = NULL;
fd1 = 0;
fd2 = 0;
fd3 = 0;
if (!CreatePipe(&this->hChildStdinRd, &this->hChildStdinWr, &saAttr, 0))
{
this->Output += "CreatePipeError\n";
return false;
}
/* Create new output read handle and the input write handle. Set
* the inheritance properties to FALSE. Otherwise, the child inherits
* the these handles; resulting in non-closeable handles to the pipes
* being created. */
fSuccess = DuplicateHandle(GetCurrentProcess(), this->hChildStdinWr,
GetCurrentProcess(), &this->hChildStdinWrDup, 0,
FALSE,
DUPLICATE_SAME_ACCESS);
if (!fSuccess)
{
this->Output += "DuplicateHandleError\n";
return false;
}
/* Close the inheritable version of ChildStdin
that we're using. */
CloseHandle(hChildStdinWr);
if (!CreatePipe(&this->hChildStdoutRd, &this->hChildStdoutWr, &saAttr, 0))
{
this->Output += "CreatePipeError\n";
return false;
}
fSuccess = DuplicateHandle(GetCurrentProcess(), this->hChildStdoutRd,
GetCurrentProcess(), &this->hChildStdoutRdDup, 0,
FALSE, DUPLICATE_SAME_ACCESS);
if (!fSuccess)
{
this->Output += "DuplicateHandleError\n";
return false;
}
/* Close the inheritable version of ChildStdout
that we're using. */
CloseHandle(hChildStdoutRd);
if (n != POPEN_4)
{
if (!CreatePipe(&this->hChildStderrRd, &this->hChildStderrWr, &saAttr, 0))
{
this->Output += "CreatePipeError\n";
return false;
}
fSuccess = DuplicateHandle(GetCurrentProcess(),
this->hChildStderrRd,
GetCurrentProcess(),
&this->hChildStderrRdDup, 0,
FALSE, DUPLICATE_SAME_ACCESS);
if (!fSuccess)
{
this->Output += "DuplicateHandleError\n";
return false;
}
/* Close the inheritable version of ChildStdErr that we're using. */
CloseHandle(hChildStderrRd);
}
switch (n)
{
case POPEN_1:
switch (mode & (_O_RDONLY | _O_TEXT | _O_BINARY | _O_WRONLY))
{
case _O_WRONLY | _O_TEXT:
/* Case for writing to child Stdin in text mode. */
fd1 = _open_osfhandle(TO_INTPTR(this->hChildStdinWrDup), mode);
/* We don't care about these pipes anymore,
so close them. */
break;
case _O_RDONLY | _O_TEXT:
/* Case for reading from child Stdout in text mode. */
fd1 = _open_osfhandle(TO_INTPTR(this->hChildStdoutRdDup), mode);
/* We don't care about these pipes anymore,
so close them. */
break;
case _O_RDONLY | _O_BINARY:
/* Case for readinig from child Stdout in
binary mode. */
fd1 = _open_osfhandle(TO_INTPTR(this->hChildStdoutRdDup), mode);
/* We don't care about these pipes anymore,
so close them. */
break;
case _O_WRONLY | _O_BINARY:
/* Case for writing to child Stdin in binary mode. */
fd1 = _open_osfhandle(TO_INTPTR(this->hChildStdinWrDup), mode);
/* We don't care about these pipes anymore,
so close them. */
break;
}
break;
case POPEN_2:
case POPEN_4:
//if ( 1 )
{
fd1 = _open_osfhandle(TO_INTPTR(this->hChildStdinWrDup), mode);
fd2 = _open_osfhandle(TO_INTPTR(this->hChildStdoutRdDup), mode);
break;
}
case POPEN_3:
//if ( 1)
{
fd1 = _open_osfhandle(TO_INTPTR(this->hChildStdinWrDup), mode);
fd2 = _open_osfhandle(TO_INTPTR(this->hChildStdoutRdDup), mode);
fd3 = _open_osfhandle(TO_INTPTR(this->hChildStderrRdDup), mode);
break;
}
}
if (n == POPEN_4)
{
if (!RealPopenCreateProcess(cmdstring,
path,
this->ConsoleSpawn.c_str(),
this->hChildStdinRd,
this->hChildStdoutWr,
this->hChildStdoutWr,
&hProcess, this->HideWindows,
this->Output))
{
if(fd1 >= 0)
{
close(fd1);
}
if(fd2 >= 0)
{
close(fd2);
}
if(fd3 >= 0)
{
close(fd3);
}
return 0;
}
}
else
{
if (!RealPopenCreateProcess(cmdstring,
path,
this->ConsoleSpawn.c_str(),
this->hChildStdinRd,
this->hChildStdoutWr,
this->hChildStderrWr,
&hProcess, this->HideWindows,
this->Output))
{
if(fd1 >= 0)
{
close(fd1);
}
if(fd2 >= 0)
{
close(fd2);
}
if(fd3 >= 0)
{
close(fd3);
}
return 0;
}
}
/*
* Insert the files we've created into the process dictionary
* all referencing the list with the process handle and the
* initial number of files (see description below in _PyPclose).
* Since if _PyPclose later tried to wait on a process when all
* handles weren't closed, it could create a deadlock with the
* child, we spend some energy here to try to ensure that we
* either insert all file handles into the dictionary or none
* at all. It's a little clumsy with the various popen modes
* and variable number of files involved.
*/
/* Child is launched. Close the parents copy of those pipe
* handles that only the child should have open. You need to
* make sure that no handles to the write end of the output pipe
* are maintained in this process or else the pipe will not close
* when the child process exits and the ReadFile will hang. */
this->ProcessHandle = hProcess;
if ( fd1 >= 0 )
{
this->pStdIn = fd1;
}
if ( fd2 >= 0 )
{
this->pStdOut = fd2;
}
if ( fd3 >= 0 )
{
this->pStdErr = fd3;
}
return true;
}
bool cmWin32ProcessExecution::CloseHandles()
{
if(this->pStdErr != -1 )
{
_close(this->pStdErr);
this->pStdErr = -1;
}
if(this->pStdIn != -1 )
{
_close(this->pStdIn);
this->pStdIn = -1;
}
if(this->pStdOut != -1 )
{
_close(this->pStdOut);
this->pStdOut = -1;
}
bool ret = true;
if (this->hChildStdinRd && !CloseHandle(this->hChildStdinRd))
{
ret = false;
}
this->hChildStdinRd = 0;
if(this->hChildStdoutRdDup && !CloseHandle(this->hChildStdoutRdDup))
{
ret = false;
}
this->hChildStdoutRdDup = 0;
if(this->hChildStderrRdDup && !CloseHandle(this->hChildStderrRdDup))
{
ret = false;
}
this->hChildStderrRdDup = 0;
if(this->hChildStdinWrDup && !CloseHandle(this->hChildStdinWrDup))
{
ret = false;
}
this->hChildStdinWrDup = 0;
if (this->hChildStdoutWr && !CloseHandle(this->hChildStdoutWr))
{
ret = false;
}
this->hChildStdoutWr = 0;
if (this->hChildStderrWr && !CloseHandle(this->hChildStderrWr))
{
ret = false;
}
this->hChildStderrWr = 0;
return ret;
}
cmWin32ProcessExecution::~cmWin32ProcessExecution()
{
this->CloseHandles();
}
/*
* Wrapper for fclose() to use for popen* files, so we can retrieve the
* exit code for the child process and return as a result of the close.
*
* This function uses the _PyPopenProcs dictionary in order to map the
* input file pointer to information about the process that was
* originally created by the popen* call that created the file pointer.
* The dictionary uses the file pointer as a key (with one entry
* inserted for each file returned by the original popen* call) and a
* single list object as the value for all files from a single call.
* The list object contains the Win32 process handle at [0], and a file
* count at [1], which is initialized to the total number of file
* handles using that list.
*
* This function closes whichever handle it is passed, and decrements
* the file count in the dictionary for the process handle pointed to
* by this file. On the last close (when the file count reaches zero),
* this function will wait for the child process and then return its
* exit code as the result of the close() operation. This permits the
* files to be closed in any order - it is always the close() of the
* final handle that will return the exit code.
*/
/* RED_FLAG 31-Aug-2000 Tim
* This is always called (today!) between a pair of
* Py_BEGIN_ALLOW_THREADS/ Py_END_ALLOW_THREADS
* macros. So the thread running this has no valid thread state, as
* far as Python is concerned. However, this calls some Python API
* functions that cannot be called safely without a valid thread
* state, in particular PyDict_GetItem.
* As a temporary hack (although it may last for years ...), we
* *rely* on not having a valid thread state in this function, in
* order to create our own "from scratch".
* This will deadlock if _PyPclose is ever called by a thread
* holding the global lock.
*/
bool cmWin32ProcessExecution::PrivateClose(int /* timeout */)
{
HANDLE hProcess = this->ProcessHandle;
int result = -1;
DWORD exit_code;
std::string output = "";
bool done = false;
while(!done)
{
Sleep(10);
bool have_some = false;
struct _stat fsout;
struct _stat fserr;
int rout = _fstat(this->pStdOut, &fsout);
int rerr = _fstat(this->pStdErr, &fserr);
if ( rout && rerr )
{
break;
}
if (fserr.st_size > 0)
{
char buffer[1024];
int len = read(this->pStdErr, buffer, 1023);
buffer[len] = 0;
if ( this->Verbose )
{
cmSystemTools::Stdout(buffer);
}
output += buffer;
have_some = true;
}
if (fsout.st_size > 0)
{
char buffer[1024];
int len = read(this->pStdOut, buffer, 1023);
buffer[len] = 0;
if ( this->Verbose )
{
cmSystemTools::Stdout(buffer);
}
output += buffer;
have_some = true;
}
unsigned long exitCode;
if ( ! have_some )
{
GetExitCodeProcess(hProcess,&exitCode);
if (exitCode != STILL_ACTIVE)
{
break;
}
}
}
if (WaitForSingleObject(hProcess, INFINITE) != WAIT_FAILED &&
GetExitCodeProcess(hProcess, &exit_code))
{
result = exit_code;
}
else
{
/* Indicate failure - this will cause the file object
* to raise an I/O error and translate the last Win32
* error code from errno. We do have a problem with
* last errors that overlap the normal errno table,
* but that's a consistent problem with the file object.
*/
if (result != EOF)
{
/* If the error wasn't from the fclose(), then
* set errno for the file object error handling.
*/
errno = GetLastError();
}
result = -1;
}
/* Free up the native handle at this point */
CloseHandle(hProcess);
this->ExitValue = result;
this->Output += output;
bool ret = this->CloseHandles();
if ( result < 0 || !ret)
{
return false;
}
return true;
}
int cmWin32ProcessExecution::Windows9xHack(const char* command)
{
BOOL bRet;
STARTUPINFO si;
PROCESS_INFORMATION pi;
DWORD exit_code=0;
if (!command)
{
cmSystemTools::Error("Windows9xHack: Command not specified");
return 1;
}
/* Make child process use this app's standard files. */
ZeroMemory(&si, sizeof si);
si.cb = sizeof si;
si.dwFlags = STARTF_USESTDHANDLES;
si.hStdInput = GetStdHandle(STD_INPUT_HANDLE);
si.hStdOutput = GetStdHandle(STD_OUTPUT_HANDLE);
si.hStdError = GetStdHandle(STD_ERROR_HANDLE);
char * app = 0;
char* cmd = new char[ strlen(command) + 1 ];
strcpy(cmd, command);
bRet = CreateProcess(
app, cmd,
0, 0,
TRUE, 0,
0, 0,
&si, &pi
);
delete [] cmd;
if (bRet)
{
if (WaitForSingleObject(pi.hProcess, INFINITE) != WAIT_FAILED)
{
GetExitCodeProcess(pi.hProcess, &exit_code);
}
CloseHandle(pi.hProcess);
CloseHandle(pi.hThread);
return exit_code;
}
return 1;
}
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