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CMake/Source/cmWin32ProcessExecution.cxx

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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile$
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) 2002 Insight Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm 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 <stdio.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))
#define win32_error(x,y) std::cout << "Win32_Error(" << x << ", " << y << ")" << std::endl, false
bool cmWin32ProcessExecution::StartProcess(
const char* cmd, const char* path, bool verbose)
{
this->Initialize();
this->m_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)
{
PROCESS_INFORMATION piProcInfo;
STARTUPINFO siStartInfo;
char *s1,*s2, *s3 = " /c ";
int i;
int x;
if (i = GetEnvironmentVariable("COMSPEC",NULL,0))
{
char *comshell;
s1 = (char *)_alloca(i);
if (!(x = GetEnvironmentVariable("COMSPEC", s1, i)))
{
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 *)_alloca(x);
ZeroMemory(s2, x);
sprintf(s2, "%s%s%s", s1, s3, 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;
return FALSE;
}
}
x = i + (int)strlen(s3) + (int)strlen(cmdstring) + 1 +
(int)strlen(modulepath) +
(int)strlen(szConsoleSpawn) + 1;
s2 = (char *)_alloca(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;
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_HIDE;
if (CreateProcess(NULL,
s2,
NULL,
NULL,
TRUE,
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;
return TRUE;
}
win32_error("CreateProcess", s2);
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 hChildStdinRd, hChildStdinWr, hChildStdoutRd, hChildStdoutWr,
hChildStderrRd, hChildStderrWr, hChildStdinWrDup, hChildStdoutRdDup,
hChildStderrRdDup, hProcess; /* hChildStdoutWrDup; */
SECURITY_ATTRIBUTES saAttr;
BOOL fSuccess;
int fd1, fd2, fd3;
//FILE *f1, *f2, *f3;
saAttr.nLength = sizeof(SECURITY_ATTRIBUTES);
saAttr.bInheritHandle = TRUE;
saAttr.lpSecurityDescriptor = NULL;
if (!CreatePipe(&hChildStdinRd, &hChildStdinWr, &saAttr, 0))
{
return win32_error("CreatePipe", NULL);
}
/* 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(), hChildStdinWr,
GetCurrentProcess(), &hChildStdinWrDup, 0,
FALSE,
DUPLICATE_SAME_ACCESS);
if (!fSuccess)
return win32_error("DuplicateHandle", NULL);
/* Close the inheritable version of ChildStdin
that we're using. */
CloseHandle(hChildStdinWr);
if (!CreatePipe(&hChildStdoutRd, &hChildStdoutWr, &saAttr, 0))
return win32_error("CreatePipe", NULL);
fSuccess = DuplicateHandle(GetCurrentProcess(), hChildStdoutRd,
GetCurrentProcess(), &hChildStdoutRdDup, 0,
FALSE, DUPLICATE_SAME_ACCESS);
if (!fSuccess)
return win32_error("DuplicateHandle", NULL);
/* Close the inheritable version of ChildStdout
that we're using. */
CloseHandle(hChildStdoutRd);
if (n != POPEN_4)
{
if (!CreatePipe(&hChildStderrRd, &hChildStderrWr, &saAttr, 0))
return win32_error("CreatePipe", NULL);
fSuccess = DuplicateHandle(GetCurrentProcess(),
hChildStderrRd,
GetCurrentProcess(),
&hChildStderrRdDup, 0,
FALSE, DUPLICATE_SAME_ACCESS);
if (!fSuccess)
return win32_error("DuplicateHandle", NULL);
/* 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(hChildStdinWrDup), mode);
//f1 = _fdopen(fd1, "w");
/* We don't care about these pipes anymore,
so close them. */
CloseHandle(hChildStdoutRdDup);
CloseHandle(hChildStderrRdDup);
break;
case _O_RDONLY | _O_TEXT:
/* Case for reading from child Stdout in text mode. */
fd1 = _open_osfhandle(TO_INTPTR(hChildStdoutRdDup), mode);
//f1 = _fdopen(fd1, "r");
/* We don't care about these pipes anymore,
so close them. */
CloseHandle(hChildStdinWrDup);
CloseHandle(hChildStderrRdDup);
break;
case _O_RDONLY | _O_BINARY:
/* Case for readinig from child Stdout in
binary mode. */
fd1 = _open_osfhandle(TO_INTPTR(hChildStdoutRdDup), mode);
//f1 = _fdopen(fd1, "rb");
/* We don't care about these pipes anymore,
so close them. */
CloseHandle(hChildStdinWrDup);
CloseHandle(hChildStderrRdDup);
break;
case _O_WRONLY | _O_BINARY:
/* Case for writing to child Stdin in binary mode. */
fd1 = _open_osfhandle(TO_INTPTR(hChildStdinWrDup), mode);
//f1 = _fdopen(fd1, "wb");
/* We don't care about these pipes anymore,
so close them. */
CloseHandle(hChildStdoutRdDup);
CloseHandle(hChildStderrRdDup);
break;
}
break;
case POPEN_2:
case POPEN_4:
if ( 1 )
{
// Comment this out. Maybe we will need it in the future.
// file IO access to the process might be cool.
//char *m1, *m2;
//if (mode && _O_TEXT)
// {
// m1 = "r";
// m2 = "w";
// }
//else
// {
// m1 = "rb";
// m2 = "wb";
// }
fd1 = _open_osfhandle(TO_INTPTR(hChildStdinWrDup), mode);
//f1 = _fdopen(fd1, m2);
fd2 = _open_osfhandle(TO_INTPTR(hChildStdoutRdDup), mode);
//f2 = _fdopen(fd2, m1);
if (n != 4)
{
CloseHandle(hChildStderrRdDup);
}
break;
}
case POPEN_3:
if ( 1)
{
// Comment this out. Maybe we will need it in the future.
// file IO access to the process might be cool.
//char *m1, *m2;
//if (mode && _O_TEXT)
// {
// m1 = "r";
// m2 = "w";
// }
//else
// {
// m1 = "rb";
// m2 = "wb";
// }
fd1 = _open_osfhandle(TO_INTPTR(hChildStdinWrDup), mode);
//f1 = _fdopen(fd1, m2);
fd2 = _open_osfhandle(TO_INTPTR(hChildStdoutRdDup), mode);
//f2 = _fdopen(fd2, m1);
fd3 = _open_osfhandle(TO_INTPTR(hChildStderrRdDup), mode);
//f3 = _fdopen(fd3, m1);
break;
}
}
if (n == POPEN_4)
{
if (!RealPopenCreateProcess(cmdstring,
path,
this->m_ConsoleSpawn.c_str(),
hChildStdinRd,
hChildStdoutWr,
hChildStdoutWr,
&hProcess))
return NULL;
}
else
{
if (!RealPopenCreateProcess(cmdstring,
path,
this->m_ConsoleSpawn.c_str(),
hChildStdinRd,
hChildStdoutWr,
hChildStderrWr,
&hProcess))
return NULL;
}
/*
* 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. */
if (!CloseHandle(hChildStdinRd))
return win32_error("CloseHandle", NULL);
if (!CloseHandle(hChildStdoutWr))
return win32_error("CloseHandle", NULL);
if ((n != 4) && (!CloseHandle(hChildStderrWr)))
return win32_error("CloseHandle", NULL);
this->m_ProcessHandle = hProcess;
if ( fd1 >= 0 )
{
// this->m_StdIn = f1;
this->m_pStdIn = fd1;
}
if ( fd2 >= 0 )
{
// this->m_StdOut = f2;
this->m_pStdOut = fd2;
}
if ( fd3 >= 0 )
{
// this->m_StdErr = f3;
this->m_pStdErr = fd3;
}
return true;
}
/*
* 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->m_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->m_pStdOut, &fsout);
int rerr = _fstat(this->m_pStdErr, &fserr);
if ( rout && rerr )
{
break;
}
if (fserr.st_size > 0)
{
char buffer[1023];
int len = read(this->m_pStdErr, buffer, 1023);
buffer[len] = 0;
if ( this->m_Verbose )
{
std::cout << buffer << std::flush;
}
output += buffer;
have_some = true;
}
if (fsout.st_size > 0)
{
char buffer[1023];
int len = read(this->m_pStdOut, buffer, 1023);
buffer[len] = 0;
if ( this->m_Verbose )
{
std::cout << buffer << std::flush;
}
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->m_ExitValue = result;
this->m_Output = output;
if ( result < 0 )
{
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,
NULL, NULL,
TRUE, 0,
NULL, NULL,
&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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