X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/039f62f43136b06b15444a7437b6c030efeaf76b..a06066343d670807825adcafebfa4fb8cfff5521:/src/msw/utilsexc.cpp

diff --git a/src/msw/utilsexc.cpp b/src/msw/utilsexc.cpp
index 12a78c001a..453b7efc5d 100644
--- a/src/msw/utilsexc.cpp
+++ b/src/msw/utilsexc.cpp
@@ -37,6 +37,7 @@
 #include "wx/log.h"
 
 #ifdef __WIN32__
+    #include "wx/stream.h"
     #include "wx/process.h"
 #endif
 
@@ -120,6 +121,94 @@ public:
     bool       state;         // set to FALSE when the process finishes
 };
 
+
+#ifdef __WIN32__
+// ----------------------------------------------------------------------------
+// wxPipeStreams
+// ----------------------------------------------------------------------------
+
+class wxPipeInputStream: public wxInputStream {
+public:
+    wxPipeInputStream(HANDLE hInput);
+    ~wxPipeInputStream();
+
+protected:
+    size_t OnSysRead(void *buffer, size_t len);
+
+protected:
+    HANDLE m_hInput;
+};
+
+class wxPipeOutputStream: public wxOutputStream {
+public:
+    wxPipeOutputStream(HANDLE hOutput);
+    ~wxPipeOutputStream();
+
+protected:
+    size_t OnSysWrite(const void *buffer, size_t len);
+
+protected:
+    HANDLE m_hOutput;
+};
+
+// ==================
+// wxPipeInputStream
+// ==================
+
+wxPipeInputStream::wxPipeInputStream(HANDLE hInput)
+{
+    m_hInput = hInput;
+}
+
+wxPipeInputStream::~wxPipeInputStream()
+{
+    ::CloseHandle(m_hInput);
+}
+
+size_t wxPipeInputStream::OnSysRead(void *buffer, size_t len)
+{
+    DWORD bytesRead;
+
+    m_lasterror = wxSTREAM_NOERROR;
+    if (! ::ReadFile(m_hInput, buffer, len, &bytesRead, NULL) ) {
+        if (GetLastError() == ERROR_BROKEN_PIPE)
+            m_lasterror = wxSTREAM_EOF;
+        else
+            m_lasterror = wxSTREAM_READ_ERROR;
+    }
+    return bytesRead;
+}
+
+// ==================
+// wxPipeOutputStream
+// ==================
+
+wxPipeOutputStream::wxPipeOutputStream(HANDLE hOutput)
+{
+    m_hOutput = hOutput;
+}
+
+wxPipeOutputStream::~wxPipeOutputStream()
+{
+    ::CloseHandle(m_hOutput);
+}
+
+size_t wxPipeOutputStream::OnSysWrite(const void *buffer, size_t len)
+{
+    DWORD bytesRead;
+
+    m_lasterror = wxSTREAM_NOERROR;
+    if (! ::WriteFile(m_hOutput, buffer, len, &bytesRead, NULL) ) {
+        if (GetLastError() == ERROR_BROKEN_PIPE)
+            m_lasterror = wxSTREAM_EOF;
+        else
+            m_lasterror = wxSTREAM_READ_ERROR;
+    }
+    return bytesRead;
+}
+
+#endif // __WIN32__
+
 // ============================================================================
 // implementation
 // ============================================================================
@@ -289,7 +378,6 @@ long wxExecute(const wxString& cmd, bool sync, wxProcess *handler)
         // only reached for space not inside quotes
         break;
     }
-
     wxString commandArgs = pc;
 
     wxWindow *winTop = wxTheApp->GetTopWindow();
@@ -314,6 +402,55 @@ long wxExecute(const wxString& cmd, bool sync, wxProcess *handler)
     return result;
 #else // 1
 
+    HANDLE hpipeRead[2];
+    HANDLE hpipeWrite[2];
+    HANDLE hStdIn = INVALID_HANDLE_VALUE;
+    HANDLE hStdOut = INVALID_HANDLE_VALUE;
+
+    // we need to inherit handles in the child process if we want to redirect
+    // its IO
+    BOOL inheritHandles = FALSE;
+
+    // open the pipes to which child process IO will be redirected if needed
+    if ( handler && handler->IsRedirected() )
+    {
+        SECURITY_ATTRIBUTES security;
+
+        security.nLength              = sizeof(security);
+        security.lpSecurityDescriptor = NULL;
+        security.bInheritHandle       = TRUE;
+
+        if ( !::CreatePipe(&hpipeRead[0], &hpipeRead[1], &security, 0) )
+        {
+            wxLogSysError(_("Can't create the inter-process read pipe"));
+
+            return 0;
+        }
+
+        if ( !::CreatePipe(&hpipeWrite[0], &hpipeWrite[1], &security, 0) )
+        {
+            ::CloseHandle(hpipeRead[0]);
+            ::CloseHandle(hpipeRead[1]);
+
+            wxLogSysError(_("Can't create the inter-process write pipe"));
+
+            return 0;
+        }
+
+        // We need to save the old stdio handles to restore them after the call
+        // to CreateProcess
+        hStdIn  = ::GetStdHandle(STD_INPUT_HANDLE);
+        hStdOut = ::GetStdHandle(STD_OUTPUT_HANDLE);
+
+        if ( !::SetStdHandle(STD_INPUT_HANDLE, hpipeRead[0]) ||
+             !::SetStdHandle(STD_OUTPUT_HANDLE, hpipeWrite[1]) )
+        {
+            wxLogDebug(_T("Failed to change stdin/out handles"));
+        }
+
+        inheritHandles = TRUE;
+    }
+
     // create the process
     STARTUPINFO si;
     wxZeroMemory(si);
@@ -327,7 +464,7 @@ long wxExecute(const wxString& cmd, bool sync, wxProcess *handler)
                          (wxChar *)command.c_str(),  // full command line
                          NULL,       // security attributes: defaults for both
                          NULL,       //   the process and its main thread
-                         FALSE,      // don't inherit handles
+                         inheritHandles,      // inherit handles if we need pipes
                          CREATE_DEFAULT_ERROR_MODE |
                          CREATE_SUSPENDED,           // flags
                          NULL,       // environment (use the same)
@@ -336,11 +473,39 @@ long wxExecute(const wxString& cmd, bool sync, wxProcess *handler)
                          &pi         // process info
                         ) == 0 )
     {
+        if ( inheritHandles )
+        {
+            ::CloseHandle(hpipeWrite[0]);
+            ::CloseHandle(hpipeWrite[1]);
+            ::CloseHandle(hpipeRead[0]);
+            ::CloseHandle(hpipeRead[1]);
+        }
+
         wxLogSysError(_("Execution of command '%s' failed"), command.c_str());
 
         return 0;
     }
 
+    // Restore the old stdio handles
+    if ( inheritHandles )
+    {
+        if ( !::SetStdHandle(STD_INPUT_HANDLE, hStdIn) ||
+             !::SetStdHandle(STD_OUTPUT_HANDLE, hStdOut) )
+        {
+            wxLogDebug(_T("Failed to restore old stdin/out handles"));
+        }
+
+        // they're still opened in child process
+        ::CloseHandle(hpipeWrite[1]);
+        ::CloseHandle(hpipeRead[0]);
+
+        // We can now initialize the wxStreams
+        wxInputStream *inStream = new wxPipeInputStream(hpipeWrite[0]);
+        wxOutputStream *outStream = new wxPipeOutputStream(hpipeRead[1]);
+
+        handler->SetPipeStreams(inStream, outStream);
+    }
+
     // register the class for the hidden window used for the notifications
     if ( !gs_classForHiddenWindow )
     {
@@ -374,8 +539,8 @@ long wxExecute(const wxString& cmd, bool sync, wxProcess *handler)
     data->state       = sync;
     if ( sync )
     {
-        wxASSERT_MSG( !handler, wxT("wxProcess param ignored for sync execution") );
-
+        // handler may be !NULL for capturing program output, but we don't use
+        // it wxExecuteData struct in this case
         data->handler = NULL;
     }
     else
@@ -441,16 +606,17 @@ long wxExecute(const wxString& cmd, bool sync, wxProcess *handler)
 
     // waiting until command executed (disable everything while doing it)
 #if wxUSE_GUI
-    wxBeginBusyCursor();
-    wxEnableTopLevelWindows(FALSE);
+    {
+        wxBusyCursor bc;
+
+        wxWindowDisabler wd;
 #endif // wxUSE_GUI
 
     while ( data->state )
         wxYield();
 
 #if wxUSE_GUI
-    wxEnableTopLevelWindows(TRUE);
-    wxEndBusyCursor();
+    }
 #endif // wxUSE_GUI
 
     DWORD dwExitCode = data->dwExitCode;