mention Watcom makefile for wxBase

[wxWidgets.git] / docs / latex / wx / process.tex

diff --git a/docs/latex/wx/process.tex b/docs/latex/wx/process.tex
index 425930487f78f58e74c892f360ebe113af8292a2..6a9f9d0dc9682173b4a0b50c9632b718ed1b88cd 100644 (file)
--- a/docs/latex/wx/process.tex
+++ b/docs/latex/wx/process.tex
@@ -1,6 +1,6 @@
 \section{\class{wxProcess}}\label{wxprocess}
 
 \section{\class{wxProcess}}\label{wxprocess}
 

-The objects of this class are used in conjunction with the 
+The objects of this class are used in conjunction with the

 \helpref{wxExecute}{wxexecute} function. When a wxProcess object is passed to
 wxExecute(), its \helpref{OnTerminate()}{wxprocessonterminate} virtual method
 is called when the process terminates. This allows the program to be
 \helpref{wxExecute}{wxexecute} function. When a wxProcess object is passed to
 wxExecute(), its \helpref{OnTerminate()}{wxprocessonterminate} virtual method
 is called when the process terminates. This allows the program to be


@@ -15,14 +15,17 @@ library users should only delete those objects whose notifications have been
 processed (and call \helpref{Detach()}{wxprocessdetach} for others).
 
 wxProcess also supports IO redirection of the child process. For this, you have
 processed (and call \helpref{Detach()}{wxprocessdetach} for others).
 
 wxProcess also supports IO redirection of the child process. For this, you have

-to call its \helpref{Redirect}{wxprocessredirect} method before passing it to 
-\helpref{wxExecute}{wxexecute}. If the child process was launched successfully, 
-\helpref{GetInputStream}{wxprocessgetinputstream}, 
-\helpref{GetOutputStream}{wxprocessgetoutputstream} and 
+to call its \helpref{Redirect}{wxprocessredirect} method before passing it to
+\helpref{wxExecute}{wxexecute}. If the child process was launched successfully,
+\helpref{GetInputStream}{wxprocessgetinputstream},
+\helpref{GetOutputStream}{wxprocessgetoutputstream} and

 \helpref{GetErrorStream}{wxprocessgeterrorstream} can then be used to retrieve
 \helpref{GetErrorStream}{wxprocessgeterrorstream} can then be used to retrieve

-the streams corresponding to the child process stdandard output, input and
+the streams corresponding to the child process standard output, input and

 error output respectively.
 
 error output respectively.
 

+\perlnote{In wxPerl this class has an additional {\tt Destroy} method,
+for explicit destruction.}
+

 \wxheading{Derived from}
 
 \helpref{wxEvtHandler}{wxevthandler}
 \wxheading{Derived from}
 
 \helpref{wxEvtHandler}{wxevthandler}


@@ -42,6 +45,8 @@ error output respectively.
 
 \func{}{wxProcess}{\param{wxEvtHandler *}{ parent = NULL}, \param{int}{ id = -1}}
 
 
 \func{}{wxProcess}{\param{wxEvtHandler *}{ parent = NULL}, \param{int}{ id = -1}}
 

+\func{}{wxProcess}{\param{int }{flags}}
+

 Constructs a process object. {\it id} is only used in the case you want to
 use wxWindows events. It identifies this object, or another window that will
 receive the event.
 Constructs a process object. {\it id} is only used in the case you want to
 use wxWindows events. It identifies this object, or another window that will
 receive the event.


@@ -50,12 +55,20 @@ If the {\it parent} parameter is different from NULL, it will receive
 a wxEVT\_END\_PROCESS notification event (you should insert EVT\_END\_PROCESS
 macro in the event table of the parent to handle it) with the given {\it id}.
 
 a wxEVT\_END\_PROCESS notification event (you should insert EVT\_END\_PROCESS
 macro in the event table of the parent to handle it) with the given {\it id}.
 

+The second constructor creates an object without any associated parent (and
+hence no id neither) but allows to specify the {\it flags} which can have the
+value of {\tt wxPROCESS\_DEFAULT} or {\tt wxPROCESS\_REDIRECT}. Specifying the
+former value has no particular effect while using the latter one is equivalent
+to calling \helpref{Redirect}{wxprocessredirect}.
+

 \wxheading{Parameters}
 
 \docparam{parent}{The event handler parent.}
 
 \docparam{id}{id of an event.}
 
 \wxheading{Parameters}
 
 \docparam{parent}{The event handler parent.}
 
 \docparam{id}{id of an event.}
 

+\docparam{flags}{either {\tt wxPROCESS\_DEFAULT} or {\tt wxPROCESS\_REDIRECT}}
+

 \membersection{wxProcess::\destruct{wxProcess}}
 
 \func{}{\destruct{wxProcess}}{\void}
 \membersection{wxProcess::\destruct{wxProcess}}
 
 \func{}{\destruct{wxProcess}}{\void}


@@ -79,7 +92,7 @@ Normally, a wxProcess object is deleted by its parent when it receives the
 notification about the process termination. However, it might happen that the
 parent object is destroyed before the external process is terminated (e.g. a
 window from which this external process was launched is closed by the user)
 notification about the process termination. However, it might happen that the
 parent object is destroyed before the external process is terminated (e.g. a
 window from which this external process was launched is closed by the user)

-and in this case it {\bf should not delete} the wxProcess object, but 
+and in this case it {\bf should not delete} the wxProcess object, but

 {\bf should call Detach()} instead. After the wxProcess object is detached
 from its parent, no notification events will be sent to the parent and the
 object will delete itself upon reception of the process termination
 {\bf should call Detach()} instead. After the wxProcess object is detached
 from its parent, no notification events will be sent to the parent and the
 object will delete itself upon reception of the process termination


@@ -108,6 +121,100 @@ It returns an output stream correspoding to the input stream of the subprocess.
 If it is NULL, you have not turned on the redirection.
 See \helpref{wxProcess::Redirect}{wxprocessredirect}.
 
 If it is NULL, you have not turned on the redirection.
 See \helpref{wxProcess::Redirect}{wxprocessredirect}.
 

+\membersection{wxProcess::IsErrorAvailable}\label{wxprocessiserroravailable}
+
+\constfunc{bool}{IsErrorAvailable}{\void}
+
+Returns {\tt true} if there is data to be read on the child process standard
+error stream.
+
+\wxheading{See also}
+
+\helpref{IsInputAvailable}{wxprocessisinputavailable}
+
+\membersection{wxProcess::IsInputAvailable}\label{wxprocessisinputavailable}
+
+\constfunc{bool}{IsInputAvailable}{\void}
+
+Returns {\tt true} if there is data to be read on the child process standard
+output stream. This allows to write simple (and extremely inefficient)
+polling-based code waiting for a better mechanism in future wxWindows versions.
+
+See the \helpref{exec sample}{sampleexec} for an example of using this
+function.
+
+\wxheading{See also}
+
+\helpref{IsInputOpened}{wxprocessisinputopened}
+
+\membersection{wxProcess::IsInputOpened}\label{wxprocessisinputopened}
+
+\constfunc{bool}{IsInputOpened}{\void}
+
+Returns {\tt true} if the child process standard output stream is opened.
+
+\membersection{wxProcess::Kill}\label{wxprocesskill}
+
+\func{static wxKillError}{Kill}{\param{int}{ pid}, \param{wxSignal}{ signal = wxSIGNONE}}
+
+Send the specified signal to the given process. Possible signal values are:
+
+\begin{verbatim}
+enum wxSignal
+{
+    wxSIGNONE = 0,  // verify if the process exists under Unix
+    wxSIGHUP,
+    wxSIGINT,
+    wxSIGQUIT,
+    wxSIGILL,
+    wxSIGTRAP,
+    wxSIGABRT,
+    wxSIGEMT,
+    wxSIGFPE,
+    wxSIGKILL,      // forcefully kill, dangerous!
+    wxSIGBUS,
+    wxSIGSEGV,
+    wxSIGSYS,
+    wxSIGPIPE,
+    wxSIGALRM,
+    wxSIGTERM       // terminate the process gently
+};
+\end{verbatim}
+
+{\tt wxSIGNONE}, {\tt wxSIGKILL} and {\tt wxSIGTERM} have the same meaning
+under both Unix and Windows but all the other signals are equivalent to
+{\tt wxSIGTERM} under Windows.
+
+Returns the element of {\tt wxKillError} enum:
+
+\begin{verbatim}
+enum wxKillError
+{
+    wxKILL_OK,              // no error
+    wxKILL_BAD_SIGNAL,      // no such signal
+    wxKILL_ACCESS_DENIED,   // permission denied
+    wxKILL_NO_PROCESS,      // no such process
+    wxKILL_ERROR            // another, unspecified error
+};
+\end{verbatim}
+
+\wxheading{See also}
+
+\helpref{wxProcess::Exists}{wxprocessexists},\rtfsp
+\helpref{wxKill}{wxkill},\rtfsp
+\helpref{Exec sample}{sampleexec}
+
+\membersection{wxProcess::Exists}\label{wxprocessexists}
+
+\func{static bool}{Exists}{\param{int}{ pid}}
+
+Returns {\tt true} if the given process exists in the system.
+
+\wxheading{See also}
+
+\helpref{wxProcess::Kill}{wxprocesskill},\rtfsp
+\helpref{Exec sample}{sampleexec}
+

 \membersection{wxProcess::OnTerminate}\label{wxprocessonterminate}
 
 \constfunc{void}{OnTerminate}{\param{int}{ pid}, \param{int}{ status}}
 \membersection{wxProcess::OnTerminate}\label{wxprocessonterminate}
 
 \constfunc{void}{OnTerminate}{\param{int}{ pid}, \param{int}{ status}}


@@ -119,6 +226,35 @@ It raises a wxWindows event when it isn't overridden.
 
 \docparam{status}{The exit code of the process.}
 
 
 \docparam{status}{The exit code of the process.}
 

+\membersection{wxProcess::Open}\label{wxprocessopen}
+
+\func{static wxProcess *}{Open}{\param{const wxString\& }{cmd} \param{int }{flags = wxEXEC\_ASYNC}}
+
+This static method replaces the standard {\tt popen()} function: it launches
+the process specified by the {\it cmd} parameter and returns the wxProcess
+object which can be used to retrieve the streams connected to the standard
+input, output and error output of the child process.
+
+If the process couldn't be launched, {\tt NULL} is returned. Note that in any
+case the returned pointer should {\bf not} be deleted, rather the process
+object will be destroyed automatically when the child process terminates. This
+does mean that the child process should be told to quit before the main program
+exits to avoid memory leaks.
+
+\wxheading{Parameters}
+
+\docparam{cmd}{The command to execute, including optional arguments.}
+\docparam{flags}{The flags to pass to \helpref{wxExecute}{wxexecute}.
+  NOTE: wxEXEC\_SYNC should not be used.}
+
+\wxheading{Return value}
+
+A pointer to new wxProcess object or {\tt NULL} on error.
+
+\wxheading{See also}
+
+\helpref{wxExecute}{wxexecute}
+

 \membersection{wxProcess::Redirect}\label{wxprocessredirect}
 
 \func{void}{Redirect}{\void}
 \membersection{wxProcess::Redirect}\label{wxprocessredirect}
 
 \func{void}{Redirect}{\void}