/////////////////////////////////////////////////////////////////////////////
-// Name: process.h
+// Name: wx/process.h
// Purpose: wxProcess class
// Author: Guilhem Lavaux
-// Modified by:
+// Modified by: Vadim Zeitlin to check error codes, added Detach() method
// Created: 24/06/98
// RCS-ID: $Id$
// Copyright: (c) 1998 Guilhem Lavaux
-// Licence: wxWindows license
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#ifndef _WX_PROCESSH__
#define _WX_PROCESSH__
-#ifdef __GNUG__
-#pragma interface "process.h"
+#include "wx/event.h"
+
+#if wxUSE_STREAMS
+ #include "wx/stream.h"
#endif
-#include "wx/defs.h"
-#include "wx/object.h"
-#include "wx/event.h"
+#include "wx/utils.h" // for wxSignal
+
+// the wxProcess creation flags
+enum
+{
+ // no redirection
+ wxPROCESS_DEFAULT = 0,
+
+ // redirect the IO of the child process
+ wxPROCESS_REDIRECT = 1
+};
+
+// ----------------------------------------------------------------------------
+// A wxProcess object should be passed to wxExecute - than its OnTerminate()
+// function will be called when the process terminates.
+// ----------------------------------------------------------------------------
-class WXDLLEXPORT wxProcess: public wxEvtHandler
+class WXDLLIMPEXP_BASE wxProcess : public wxEvtHandler
{
- DECLARE_DYNAMIC_CLASS(wxProcess)
- public:
+public:
+ // kill the process with the given PID
+ static wxKillError Kill(int pid, wxSignal sig = wxSIGTERM, int flags = wxKILL_NOCHILDREN);
+
+ // test if the given process exists
+ static bool Exists(int pid);
+
+ // this function replaces the standard popen() one: it launches a process
+ // asynchronously and allows the caller to get the streams connected to its
+ // std{in|out|err}
+ //
+ // on error NULL is returned, in any case the process object will be
+ // deleted automatically when the process terminates and should *not* be
+ // deleted by the caller
+ static wxProcess *Open(const wxString& cmd, int flags = wxEXEC_ASYNC);
+
+
+ // ctors
+ wxProcess(wxEvtHandler *parent = (wxEvtHandler *) NULL, int nId = wxID_ANY)
+ { Init(parent, nId, wxPROCESS_DEFAULT); }
+
+ wxProcess(int flags) { Init(NULL, wxID_ANY, flags); }
+
+ virtual ~wxProcess();
+
+ // get the process ID of the process executed by Open()
+ long GetPid() const { return m_pid; }
+
+ // may be overridden to be notified about process termination
+ virtual void OnTerminate(int pid, int status);
- wxProcess(wxEvtHandler *parent = (wxEvtHandler *) NULL, int id = -1);
- virtual ~wxProcess();
+ // call this before passing the object to wxExecute() to redirect the
+ // launched process stdin/stdout, then use GetInputStream() and
+ // GetOutputStream() to get access to them
+ void Redirect() { m_redirect = true; }
+ bool IsRedirected() const { return m_redirect; }
- virtual void OnTerminate(int pid);
+ // detach from the parent - should be called by the parent if it's deleted
+ // before the process it started terminates
+ void Detach();
- protected:
- int m_id;
+#if wxUSE_STREAMS
+ // Pipe handling
+ wxInputStream *GetInputStream() const { return m_inputStream; }
+ wxInputStream *GetErrorStream() const { return m_errorStream; }
+ wxOutputStream *GetOutputStream() const { return m_outputStream; }
+
+ // close the output stream indicating that nothing more will be written
+ void CloseOutput() { delete m_outputStream; m_outputStream = NULL; }
+
+ // return true if the child process stdout is not closed
+ bool IsInputOpened() const;
+
+ // return true if any input is available on the child process stdout/err
+ bool IsInputAvailable() const;
+ bool IsErrorAvailable() const;
+
+ // implementation only (for wxExecute)
+ //
+ // NB: the streams passed here should correspond to the child process
+ // stdout, stdin and stderr and here the normal naming convention is
+ // used unlike elsewhere in this class
+ void SetPipeStreams(wxInputStream *outStream,
+ wxOutputStream *inStream,
+ wxInputStream *errStream);
+#endif // wxUSE_STREAMS
+
+protected:
+ void Init(wxEvtHandler *parent, int id, int flags);
+ void SetPid(long pid) { m_pid = pid; }
+
+ int m_id;
+ long m_pid;
+
+#if wxUSE_STREAMS
+ // these streams are connected to stdout, stderr and stdin of the child
+ // process respectively (yes, m_inputStream corresponds to stdout -- very
+ // confusing but too late to change now)
+ wxInputStream *m_inputStream,
+ *m_errorStream;
+ wxOutputStream *m_outputStream;
+#endif // wxUSE_STREAMS
+
+ bool m_redirect;
+
+ DECLARE_DYNAMIC_CLASS(wxProcess)
+ DECLARE_NO_COPY_CLASS(wxProcess)
};
-// Process Event handling
+// ----------------------------------------------------------------------------
+// wxProcess events
+// ----------------------------------------------------------------------------
+
+extern WXDLLIMPEXP_BASE const wxEventType wxEVT_END_PROCESS;
-class WXDLLEXPORT wxProcessEvent: public wxEvent
+class WXDLLIMPEXP_BASE wxProcessEvent : public wxEvent
{
- DECLARE_DYNAMIC_CLASS(wxProcessEvent)
- public:
+public:
+ wxProcessEvent(int nId = 0, int pid = 0, int exitcode = 0) : wxEvent(nId)
+ {
+ m_eventType = wxEVT_END_PROCESS;
+ m_pid = pid;
+ m_exitcode = exitcode;
+ }
+
+ // accessors
+ // PID of process which terminated
+ int GetPid() { return m_pid; }
+
+ // the exit code
+ int GetExitCode() { return m_exitcode; }
- wxProcessEvent(int id = 0, int pid = -1);
-
- inline int GetPid() { return m_pid; }
- inline void SetPid(int pid) { m_pid = pid; }
+ // implement the base class pure virtual
+ virtual wxEvent *Clone() const { return new wxProcessEvent(*this); }
- public:
- int m_pid;
+public:
+ int m_pid,
+ m_exitcode;
+
+ DECLARE_DYNAMIC_CLASS_NO_ASSIGN(wxProcessEvent)
};
-typedef void (wxObject::*wxProcessEventFunction)(wxProcessEvent&);
+typedef void (wxEvtHandler::*wxProcessEventFunction)(wxProcessEvent&);
-#define EVT_END_PROCESS(id, func) { wxEVT_END_PROCESS, id, -1, (wxObjectEvent) (wxEventFunction) (wxProcessEventFunction) & fn, NULL},
+#define wxProcessEventHandler(func) \
+ (wxObjectEventFunction)(wxEventFunction)wxStaticCastEvent(wxProcessEventFunction, &func)
-#endif
- // _WX_PROCESSH__
+#define EVT_END_PROCESS(id, func) \
+ wx__DECLARE_EVT1(wxEVT_END_PROCESS, id, wxProcessEventHandler(func))
+
+#endif // _WX_PROCESSH__
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