#include "wx/utils.h"
+#define USE_PUTENV (!defined(HAVE_SETENV) && defined(HAVE_PUTENV))
+
#ifndef WX_PRECOMP
#include "wx/string.h"
#include "wx/intl.h"
#include "wx/log.h"
#include "wx/app.h"
#include "wx/wxcrtvararg.h"
+ #if USE_PUTENV
+ #include "wx/module.h"
+ #include "wx/hashmap.h"
+ #endif
#endif
#include "wx/apptrait.h"
#include "wx/wfstream.h"
+#include "wx/private/selectdispatcher.h"
+#include "wx/private/fdiodispatcher.h"
#include "wx/unix/execute.h"
#include "wx/unix/private.h"
+#ifdef wxHAS_GENERIC_PROCESS_CALLBACK
+#include "wx/private/fdiodispatcher.h"
+#endif
+
#include <pwd.h>
#include <sys/wait.h> // waitpid()
#endif // HAS_PIPE_INPUT_STREAM
-#if wxUSE_BASE
-
#if defined(__MWERKS__) && defined(__MACH__)
#ifndef WXWIN_OS_DESCRIPTION
#define WXWIN_OS_DESCRIPTION "MacOS X"
return err;
}
-#define WXEXECUTE_NARGS 127
-
-#if defined(__DARWIN__)
-long wxMacExecute(wxChar **argv,
- int flags,
- wxProcess *process);
-#endif
-
-long wxExecute( const wxString& command, int flags, wxProcess *process )
+// Shutdown or reboot the PC
+bool wxShutdown(wxShutdownFlags wFlags)
{
- wxCHECK_MSG( !command.empty(), 0, wxT("can't exec empty command") );
-
- wxLogTrace(wxT("exec"), wxT("Executing \"%s\""), command.c_str());
-
-#if wxUSE_THREADS
- // fork() doesn't mix well with POSIX threads: on many systems the program
- // deadlocks or crashes for some reason. Probably our code is buggy and
- // doesn't do something which must be done to allow this to work, but I
- // don't know what yet, so for now just warn the user (this is the least we
- // can do) about it
- wxASSERT_MSG( wxThread::IsMain(),
- _T("wxExecute() can be called only from the main thread") );
-#endif // wxUSE_THREADS
+ wxChar level;
+ switch ( wFlags )
+ {
+ case wxSHUTDOWN_POWEROFF:
+ level = _T('0');
+ break;
- int argc = 0;
- wxChar *argv[WXEXECUTE_NARGS];
- wxString argument;
- const wxChar *cptr = command.c_str();
- wxChar quotechar = wxT('\0'); // is arg quoted?
- bool escaped = false;
+ case wxSHUTDOWN_REBOOT:
+ level = _T('6');
+ break;
- // split the command line in arguments
- do
- {
- argument = wxEmptyString;
- quotechar = wxT('\0');
+ default:
+ wxFAIL_MSG( _T("unknown wxShutdown() flag") );
+ return false;
+ }
- // eat leading whitespace:
- while ( wxIsspace(*cptr) )
- cptr++;
+ return system(wxString::Format(_T("init %c"), level).mb_str()) == 0;
+}
- if ( *cptr == wxT('\'') || *cptr == wxT('"') )
- quotechar = *cptr++;
+// ----------------------------------------------------------------------------
+// wxStream classes to support IO redirection in wxExecute
+// ----------------------------------------------------------------------------
- do
- {
- if ( *cptr == wxT('\\') && ! escaped )
- {
- escaped = true;
- cptr++;
- continue;
- }
+#if HAS_PIPE_INPUT_STREAM
- // all other characters:
- argument += *cptr++;
- escaped = false;
+bool wxPipeInputStream::CanRead() const
+{
+ if ( m_lasterror == wxSTREAM_EOF )
+ return false;
- // have we reached the end of the argument?
- if ( (*cptr == quotechar && ! escaped)
- || (quotechar == wxT('\0') && wxIsspace(*cptr))
- || *cptr == wxT('\0') )
- {
- wxASSERT_MSG( argc < WXEXECUTE_NARGS,
- wxT("too many arguments in wxExecute") );
+ // check if there is any input available
+ struct timeval tv;
+ tv.tv_sec = 0;
+ tv.tv_usec = 0;
- argv[argc] = new wxChar[argument.length() + 1];
- wxStrcpy(argv[argc], argument.c_str());
- argc++;
+ const int fd = m_file->fd();
- // if not at end of buffer, swallow last character:
- if(*cptr)
- cptr++;
+ fd_set readfds;
- break; // done with this one, start over
- }
- } while(*cptr);
- } while(*cptr);
- argv[argc] = NULL;
+ wxFD_ZERO(&readfds);
+ wxFD_SET(fd, &readfds);
- long lRc;
-#if defined(__DARWIN__)
- // wxMacExecute only executes app bundles.
- // It returns an error code if the target is not an app bundle, thus falling
- // through to the regular wxExecute for non app bundles.
- lRc = wxMacExecute(argv, flags, process);
- if( lRc != ((flags & wxEXEC_SYNC) ? -1 : 0))
- return lRc;
-#endif
+ switch ( select(fd + 1, &readfds, NULL, NULL, &tv) )
+ {
+ case -1:
+ wxLogSysError(_("Impossible to get child process input"));
+ // fall through
- // do execute the command
- lRc = wxExecute(argv, flags, process);
+ case 0:
+ return false;
- // clean up
- argc = 0;
- while( argv[argc] )
- delete [] argv[argc++];
+ default:
+ wxFAIL_MSG(_T("unexpected select() return value"));
+ // still fall through
- return lRc;
+ case 1:
+ // input available -- or maybe not, as select() returns 1 when a
+ // read() will complete without delay, but it could still not read
+ // anything
+ return !Eof();
+ }
}
+#endif // HAS_PIPE_INPUT_STREAM
+
// ----------------------------------------------------------------------------
// wxShell
// ----------------------------------------------------------------------------
return wxExecute(wxMakeShellCommand(command), output);
}
-// Shutdown or reboot the PC
-bool wxShutdown(wxShutdownFlags wFlags)
+namespace
{
- wxChar level;
- switch ( wFlags )
+
+// helper class for storing arguments as char** array suitable for passing to
+// execvp(), whatever form they were passed to us
+class ArgsArray
+{
+public:
+ ArgsArray(const wxArrayString& args)
{
- case wxSHUTDOWN_POWEROFF:
- level = _T('0');
- break;
+ Init(args.size());
- case wxSHUTDOWN_REBOOT:
- level = _T('6');
- break;
+ for ( int i = 0; i < m_argc; i++ )
+ {
+ m_argv[i] = wxStrdup(args[i]);
+ }
+ }
- default:
- wxFAIL_MSG( _T("unknown wxShutdown() flag") );
- return false;
+#if wxUSE_UNICODE
+ ArgsArray(wchar_t **wargv)
+ {
+ int argc = 0;
+ while ( *wargv++ )
+ argc++;
+
+ Init(argc);
+
+ for ( int i = 0; i < m_argc; i++ )
+ {
+ m_argv[i] = wxSafeConvertWX2MB(wargv[i]).release();
+ }
}
+#endif // wxUSE_UNICODE
- return system(wxString::Format(_T("init %c"), level).mb_str()) == 0;
-}
+ ~ArgsArray()
+ {
+ for ( int i = 0; i < m_argc; i++ )
+ {
+ free(m_argv[i]);
+ }
+
+ delete [] m_argv;
+ }
+
+ operator char**() const { return m_argv; }
+
+private:
+ void Init(int argc)
+ {
+ m_argc = argc;
+ m_argv = new char *[m_argc + 1];
+ m_argv[m_argc] = NULL;
+ }
+
+ int m_argc;
+ char **m_argv;
+
+ DECLARE_NO_COPY_CLASS(ArgsArray)
+};
+
+} // anonymous namespace
// ----------------------------------------------------------------------------
-// wxStream classes to support IO redirection in wxExecute
+// wxExecute implementations
// ----------------------------------------------------------------------------
-#if HAS_PIPE_INPUT_STREAM
+#if defined(__DARWIN__)
+bool wxMacLaunch(char **argv);
+#endif
-bool wxPipeInputStream::CanRead() const
+long wxExecute(const wxString& command, int flags, wxProcess *process)
{
- if ( m_lasterror == wxSTREAM_EOF )
- return false;
+ wxArrayString args;
- // check if there is any input available
- struct timeval tv;
- tv.tv_sec = 0;
- tv.tv_usec = 0;
+ const char *cptr = command.c_str();
- const int fd = m_file->fd();
+ // split the command line in arguments
+ //
+ // TODO: combine this with wxCmdLineParser::ConvertStringToArgs(), it
+ // doesn't do exactly the same thing right now but it's pretty close
+ // and we shouldn't maintain 2 copies of this code
+ do
+ {
+ wxString argument;
+ char quotechar = '\0'; // is arg quoted?
+ bool escaped = false;
- fd_set readfds;
+ // eat leading whitespace:
+ while ( wxIsspace(*cptr) )
+ cptr++;
- wxFD_ZERO(&readfds);
- wxFD_SET(fd, &readfds);
+ if ( *cptr == '\'' || *cptr == '"' )
+ quotechar = *cptr++;
- switch ( select(fd + 1, &readfds, NULL, NULL, &tv) )
- {
- case -1:
- wxLogSysError(_("Impossible to get child process input"));
- // fall through
+ do
+ {
+ if ( *cptr == '\\' && !escaped )
+ {
+ escaped = true;
+ cptr++;
+ continue;
+ }
- case 0:
- return false;
+ // all other characters:
+ argument += *cptr++;
+ escaped = false;
- default:
- wxFAIL_MSG(_T("unexpected select() return value"));
- // still fall through
+ // have we reached the end of the argument?
+ if ( (*cptr == quotechar && !escaped)
+ || (quotechar == '\0' && wxIsspace(*cptr))
+ || *cptr == '\0' )
+ {
+ args.push_back(argument);
- case 1:
- // input available -- or maybe not, as select() returns 1 when a
- // read() will complete without delay, but it could still not read
- // anything
- return !Eof();
- }
+ // if not at end of buffer, swallow last character:
+ if ( *cptr )
+ cptr++;
+
+ break; // done with this one, start over
+ }
+ } while ( *cptr );
+ } while ( *cptr );
+
+ ArgsArray argv(args);
+
+ // do execute the command
+ return wxExecute(argv, flags, process);
}
-#endif // HAS_PIPE_INPUT_STREAM
+#if wxUSE_UNICODE
-// ----------------------------------------------------------------------------
-// wxExecute: the real worker function
-// ----------------------------------------------------------------------------
+long wxExecute(wchar_t **wargv, int flags, wxProcess *process)
+{
+ ArgsArray argv(wargv);
+
+ return wxExecute(argv, flags, process);
+}
-long wxExecute(wxChar **argv, int flags, wxProcess *process)
+#endif // wxUSE_UNICODE
+
+// wxExecute: the real worker function
+long wxExecute(char **argv, int flags, wxProcess *process)
{
// for the sync execution, we return -1 to indicate failure, but for async
// case we return 0 which is never a valid PID
wxCHECK_MSG( *argv, ERROR_RETURN_CODE, wxT("can't exec empty command") );
-#if wxUSE_UNICODE
- int mb_argc = 0;
- char *mb_argv[WXEXECUTE_NARGS];
+#if wxUSE_THREADS
+ // fork() doesn't mix well with POSIX threads: on many systems the program
+ // deadlocks or crashes for some reason. Probably our code is buggy and
+ // doesn't do something which must be done to allow this to work, but I
+ // don't know what yet, so for now just warn the user (this is the least we
+ // can do) about it
+ wxASSERT_MSG( wxThread::IsMain(),
+ _T("wxExecute() can be called only from the main thread") );
+#endif // wxUSE_THREADS
- while (argv[mb_argc])
+#if defined(__DARWIN__)
+ // wxMacLaunch() only executes app bundles and only does it asynchronously.
+ // It returns false if the target is not an app bundle, thus falling
+ // through to the regular code for non app bundles.
+ if ( !(flags & wxEXEC_SYNC) && wxMacLaunch(argv) )
{
- wxWX2MBbuf mb_arg = wxSafeConvertWX2MB(argv[mb_argc]);
- mb_argv[mb_argc] = strdup(mb_arg);
- mb_argc++;
+ // we don't have any PID to return so just make up something non null
+ return -1;
}
- mb_argv[mb_argc] = (char *) NULL;
-
- // this macro will free memory we used above
- #define ARGS_CLEANUP \
- for ( mb_argc = 0; mb_argv[mb_argc]; mb_argc++ ) \
- free(mb_argv[mb_argc])
-#else // ANSI
- // no need for cleanup
- #define ARGS_CLEANUP
-
- wxChar **mb_argv = argv;
-#endif // Unicode/ANSI
-
- // we want this function to work even if there is no wxApp so ensure that
- // we have a valid traits pointer
- wxConsoleAppTraits traitsConsole;
- wxAppTraits *traits = wxTheApp ? wxTheApp->GetTraits() : NULL;
- if ( !traits )
- traits = &traitsConsole;
-
- // this struct contains all information which we pass to and from
- // wxAppTraits methods
+#endif // __DARWIN__
+
+
+ // this struct contains all information which we use for housekeeping
wxExecuteData execData;
execData.flags = flags;
execData.process = process;
// create pipes
- if ( !traits->CreateEndProcessPipe(execData) )
+ if ( !execData.pipeEndProcDetect.Create() )
{
wxLogError( _("Failed to execute '%s'\n"), *argv );
- ARGS_CLEANUP;
-
return ERROR_RETURN_CODE;
}
{
wxLogError( _("Failed to execute '%s'\n"), *argv );
- ARGS_CLEANUP;
-
return ERROR_RETURN_CODE;
}
}
{
wxLogSysError( _("Fork failed") );
- ARGS_CLEANUP;
-
return ERROR_RETURN_CODE;
}
else if ( pid == 0 ) // we're in child
if ( fd == pipeIn[wxPipe::Read]
|| fd == pipeOut[wxPipe::Write]
|| fd == pipeErr[wxPipe::Write]
- || traits->IsWriteFDOfEndProcessPipe(execData, fd) )
+ || fd == (execData.pipeEndProcDetect)[wxPipe::Write] )
{
// don't close this one, we still need it
continue;
#endif // !__VMS
// reading side can be safely closed but we should keep the write one
- // opened
- traits->DetachWriteFDOfEndProcessPipe(execData);
+ // opened, it will be only closed when the process terminates resulting
+ // in a read notification to the parent
+ execData.pipeEndProcDetect.Detach(wxPipe::Write);
+ execData.pipeEndProcDetect.Close();
// redirect stdin, stdout and stderr
if ( pipeIn.IsOk() )
pipeErr.Close();
}
- execvp (*mb_argv, mb_argv);
+ execvp(*argv, argv);
fprintf(stderr, "execvp(");
- // CS changed ppc to ppc_ as ppc is not available under mac os CW Mach-O
- for ( char **ppc_ = mb_argv; *ppc_; ppc_++ )
- fprintf(stderr, "%s%s", ppc_ == mb_argv ? "" : ", ", *ppc_);
+ for ( char **a = argv; *a; a++ )
+ fprintf(stderr, "%s%s", a == argv ? "" : ", ", *a);
fprintf(stderr, ") failed with error %d!\n", errno);
// there is no return after successful exec()
}
else // we're in parent
{
- ARGS_CLEANUP;
-
// save it for WaitForChild() use
execData.pid = pid;
// called bufOut and not bufIn
wxStreamTempInputBuffer bufOut,
bufErr;
-#endif // HAS_PIPE_INPUT_STREAM
if ( process && process->IsRedirected() )
{
-#if HAS_PIPE_INPUT_STREAM
wxOutputStream *inStream =
new wxFileOutputStream(pipeIn.Detach(wxPipe::Write));
- wxPipeInputStream *outStream =
- new wxPipeInputStream(pipeOut.Detach(wxPipe::Read));
+ const int fdOut = pipeOut.Detach(wxPipe::Read);
+ wxPipeInputStream *outStream = new wxPipeInputStream(fdOut);
- wxPipeInputStream *errStream =
- new wxPipeInputStream(pipeErr.Detach(wxPipe::Read));
+ const int fdErr = pipeErr.Detach(wxPipe::Read);
+ wxPipeInputStream *errStream = new wxPipeInputStream(fdErr);
process->SetPipeStreams(outStream, inStream, errStream);
execData.bufOut = &bufOut;
execData.bufErr = &bufErr;
-#endif // HAS_PIPE_INPUT_STREAM
+
+ execData.fdOut = fdOut;
+ execData.fdErr = fdErr;
}
+#endif // HAS_PIPE_INPUT_STREAM
if ( pipeIn.IsOk() )
{
pipeErr.Close();
}
+ // we want this function to work even if there is no wxApp so ensure
+ // that we have a valid traits pointer
+ wxConsoleAppTraits traitsConsole;
+ wxAppTraits *traits = wxTheApp ? wxTheApp->GetTraits() : NULL;
+ if ( !traits )
+ traits = &traitsConsole;
+
return traits->WaitForChild(execData);
}
}
#undef ERROR_RETURN_CODE
-#undef ARGS_CLEANUP
// ----------------------------------------------------------------------------
// file and directory functions
const wxChar* wxGetHomeDir( wxString *home )
{
- *home = wxGetUserHome( wxEmptyString );
+ *home = wxGetUserHome();
wxString tmp;
if ( home->empty() )
*home = wxT("/");
return home->c_str();
}
-#if wxUSE_UNICODE
-const wxMB2WXbuf wxGetUserHome( const wxString &user )
-#else // just for binary compatibility -- there is no 'const' here
-char *wxGetUserHome( const wxString &user )
-#endif
+wxString wxGetUserHome( const wxString &user )
{
struct passwd *who = (struct passwd *) NULL;
if ((ptr = wxGetenv(wxT("HOME"))) != NULL)
{
-#if wxUSE_UNICODE
- wxWCharBuffer buffer( ptr );
- return buffer;
-#else
return ptr;
-#endif
}
- if ((ptr = wxGetenv(wxT("USER"))) != NULL || (ptr = wxGetenv(wxT("LOGNAME"))) != NULL)
+
+ if ((ptr = wxGetenv(wxT("USER"))) != NULL ||
+ (ptr = wxGetenv(wxT("LOGNAME"))) != NULL)
{
who = getpwnam(wxSafeConvertWX2MB(ptr));
}
- // We now make sure the the user exists!
- if (who == NULL)
+ // make sure the user exists!
+ if ( !who )
{
who = getpwuid(getuid());
}
bool wxIsPlatform64Bit()
{
- wxString machine = wxGetCommandOutput(wxT("uname -m"));
-
- // NOTE: these tests are not 100% reliable!
- return machine.Contains(wxT("AMD64")) ||
- machine.Contains(wxT("IA64")) ||
- machine.Contains(wxT("x64")) ||
- machine.Contains(wxT("X64")) ||
- machine.Contains(wxT("alpha")) ||
- machine.Contains(wxT("hppa64")) ||
- machine.Contains(wxT("ppc64"));
+ const wxString machine = wxGetCommandOutput(wxT("uname -m"));
+
+ // the test for "64" is obviously not 100% reliable but seems to work fine
+ // in practice
+ return machine.Contains(wxT("64")) ||
+ machine.Contains(wxT("alpha"));
}
// these functions are in mac/utils.cpp for wxMac
// env vars
// ----------------------------------------------------------------------------
+#if USE_PUTENV
+
+WX_DECLARE_STRING_HASH_MAP(char *, wxEnvVars);
+
+static wxEnvVars gs_envVars;
+
+class wxSetEnvModule : public wxModule
+{
+public:
+ virtual bool OnInit() { return true; }
+ virtual void OnExit()
+ {
+ for ( wxEnvVars::const_iterator i = gs_envVars.begin();
+ i != gs_envVars.end();
+ ++i )
+ {
+ free(i->second);
+ }
+
+ gs_envVars.clear();
+ }
+
+ DECLARE_DYNAMIC_CLASS(wxSetEnvModule)
+};
+
+IMPLEMENT_DYNAMIC_CLASS(wxSetEnvModule, wxModule)
+
+#endif // USE_PUTENV
+
bool wxGetEnv(const wxString& var, wxString *value)
{
// wxGetenv is defined as getenv()
static bool wxDoSetEnv(const wxString& variable, const char *value)
{
#if defined(HAVE_SETENV)
+ if ( !value )
+ {
+#ifdef HAVE_UNSETENV
+ // don't test unsetenv() return value: it's void on some systems (at
+ // least Darwin)
+ unsetenv(variable.mb_str());
+ return true;
+#else
+ value = ""; // we can't pass NULL to setenv()
+#endif
+ }
+
return setenv(variable.mb_str(), value, 1 /* overwrite */) == 0;
#elif defined(HAVE_PUTENV)
wxString s = variable;
// transform to ANSI
const wxWX2MBbuf p = s.mb_str();
- // the string will be free()d by libc
char *buf = (char *)malloc(strlen(p) + 1);
strcpy(buf, p);
+ // store the string to free() it later
+ wxEnvVars::iterator i = gs_envVars.find(variable);
+ if ( i != gs_envVars.end() )
+ {
+ free(i->second);
+ i->second = buf;
+ }
+ else // this variable hadn't been set before
+ {
+ gs_envVars[variable] = buf;
+ }
+
return putenv(buf) == 0;
#else // no way to set an env var
return false;
#endif // wxUSE_ON_FATAL_EXCEPTION
-#endif // wxUSE_BASE
-
-#if wxUSE_GUI
-
// ----------------------------------------------------------------------------
// wxExecute support
// ----------------------------------------------------------------------------
-// Darwin doesn't use the same process end detection mechanisms so we don't
-// need wxExecute-related helpers for it
-#if !(defined(__DARWIN__) && defined(__WXMAC__))
-
-bool wxGUIAppTraits::CreateEndProcessPipe(wxExecuteData& execData)
+int wxAppTraits::AddProcessCallback(wxEndProcessData *data, int fd)
{
- return execData.pipeEndProcDetect.Create();
-}
+ // define a custom handler processing only the closure of the descriptor
+ struct wxEndProcessFDIOHandler : public wxFDIOHandler
+ {
+ wxEndProcessFDIOHandler(wxEndProcessData *data, int fd)
+ : m_data(data), m_fd(fd)
+ {
+ }
-bool wxGUIAppTraits::IsWriteFDOfEndProcessPipe(wxExecuteData& execData, int fd)
-{
- return fd == (execData.pipeEndProcDetect)[wxPipe::Write];
-}
+ virtual void OnReadWaiting()
+ {
+ wxFDIODispatcher::Get()->UnregisterFD(m_fd);
+ close(m_fd);
-void wxGUIAppTraits::DetachWriteFDOfEndProcessPipe(wxExecuteData& execData)
-{
- execData.pipeEndProcDetect.Detach(wxPipe::Write);
- execData.pipeEndProcDetect.Close();
-}
+ wxHandleProcessTermination(m_data);
-#else // !Darwin
+ delete this;
+ }
-bool wxGUIAppTraits::CreateEndProcessPipe(wxExecuteData& WXUNUSED(execData))
-{
- return true;
+ virtual void OnWriteWaiting() { wxFAIL_MSG("unreachable"); }
+ virtual void OnExceptionWaiting() { wxFAIL_MSG("unreachable"); }
+
+ wxEndProcessData * const m_data;
+ const int m_fd;
+ };
+
+ wxFDIODispatcher::Get()->RegisterFD
+ (
+ fd,
+ new wxEndProcessFDIOHandler(data, fd),
+ wxFDIO_INPUT
+ );
+ return fd; // unused, but return something unique for the tag
}
-bool
-wxGUIAppTraits::IsWriteFDOfEndProcessPipe(wxExecuteData& WXUNUSED(execData),
- int WXUNUSED(fd))
+bool wxAppTraits::CheckForRedirectedIO(wxExecuteData& execData)
{
+#if HAS_PIPE_INPUT_STREAM
+ bool hasIO = false;
+
+ if ( execData.bufOut && execData.bufOut->Update() )
+ hasIO = true;
+
+ if ( execData.bufErr && execData.bufErr->Update() )
+ hasIO = true;
+
+ return hasIO;
+#else // !HAS_PIPE_INPUT_STREAM
return false;
+#endif // HAS_PIPE_INPUT_STREAM/!HAS_PIPE_INPUT_STREAM
}
-void
-wxGUIAppTraits::DetachWriteFDOfEndProcessPipe(wxExecuteData& WXUNUSED(execData))
+// helper classes/functions used by WaitForChild()
+namespace
{
- // nothing to do here, we don't use the pipe
-}
-
-#endif // !Darwin/Darwin
-int wxGUIAppTraits::WaitForChild(wxExecuteData& execData)
+// convenient base class for IO handlers which are registered for read
+// notifications only and which also stores the FD we're reading from
+//
+// the derived classes still have to implement OnReadWaiting()
+class wxReadFDIOHandler : public wxFDIOHandler
{
- wxEndProcessData *endProcData = new wxEndProcessData;
+public:
+ wxReadFDIOHandler(wxFDIODispatcher& disp, int fd) : m_fd(fd)
+ {
+ if ( fd )
+ disp.RegisterFD(fd, this, wxFDIO_INPUT);
+ }
- const int flags = execData.flags;
+ virtual void OnWriteWaiting() { wxFAIL_MSG("unreachable"); }
+ virtual void OnExceptionWaiting() { wxFAIL_MSG("unreachable"); }
- // wxAddProcessCallback is now (with DARWIN) allowed to call the
- // callback function directly if the process terminates before
- // the callback can be added to the run loop. Set up the endProcData.
- if ( flags & wxEXEC_SYNC )
- {
- // we may have process for capturing the program output, but it's
- // not used in wxEndProcessData in the case of sync execution
- endProcData->process = NULL;
+protected:
+ const int m_fd;
- // sync execution: indicate it by negating the pid
- endProcData->pid = -execData.pid;
- }
- else
+ DECLARE_NO_COPY_CLASS(wxReadFDIOHandler)
+};
+
+// class for monitoring our end of the process detection pipe, simply sets a
+// flag when input on the pipe (which must be due to EOF) is detected
+class wxEndHandler : public wxReadFDIOHandler
+{
+public:
+ wxEndHandler(wxFDIODispatcher& disp, int fd)
+ : wxReadFDIOHandler(disp, fd)
{
- // async execution, nothing special to do -- caller will be
- // notified about the process termination if process != NULL, endProcData
- // will be deleted in GTK_EndProcessDetector
- endProcData->process = execData.process;
- endProcData->pid = execData.pid;
+ m_terminated = false;
}
+ bool Terminated() const { return m_terminated; }
- if ( !(flags & wxEXEC_NOEVENTS) )
- {
-#if defined(__DARWIN__) && (defined(__WXMAC__) || defined(__WXCOCOA__))
- endProcData->tag = wxAddProcessCallbackForPid(endProcData, execData.pid);
-#else
- endProcData->tag = wxAddProcessCallback
- (
- endProcData,
- execData.pipeEndProcDetect.Detach(wxPipe::Read)
- );
+ virtual void OnReadWaiting() { m_terminated = true; }
- execData.pipeEndProcDetect.Close();
-#endif // defined(__DARWIN__) && (defined(__WXMAC__) || defined(__WXCOCOA__))
- }
+private:
+ bool m_terminated;
- if ( flags & wxEXEC_SYNC )
+ DECLARE_NO_COPY_CLASS(wxEndHandler)
+};
+
+#if wxUSE_STREAMS
+
+// class for monitoring our ends of child stdout/err, should be constructed
+// with the FD and stream from wxExecuteData and will do nothing if they're
+// invalid
+//
+// unlike wxEndHandler this class registers itself with the provided dispatcher
+class wxRedirectedIOHandler : public wxReadFDIOHandler
+{
+public:
+ wxRedirectedIOHandler(wxFDIODispatcher& disp,
+ int fd,
+ wxStreamTempInputBuffer *buf)
+ : wxReadFDIOHandler(disp, fd),
+ m_buf(buf)
{
- wxBusyCursor bc;
- int exitcode = 0;
+ }
- wxWindowDisabler *wd = flags & (wxEXEC_NODISABLE | wxEXEC_NOEVENTS)
- ? NULL
- : new wxWindowDisabler;
+ virtual void OnReadWaiting()
+ {
+ m_buf->Update();
+ }
- if ( flags & wxEXEC_NOEVENTS )
- {
- // just block waiting for the child to exit
- int status = 0;
+private:
+ wxStreamTempInputBuffer * const m_buf;
- int result = waitpid(execData.pid, &status, 0);
+ DECLARE_NO_COPY_CLASS(wxRedirectedIOHandler)
+};
- if ( result == -1 )
- {
- wxLogLastError(_T("waitpid"));
- exitcode = -1;
- }
- else
- {
- wxASSERT_MSG( result == execData.pid,
- _T("unexpected waitpid() return value") );
+#endif // wxUSE_STREAMS
- if ( WIFEXITED(status) )
- {
- exitcode = WEXITSTATUS(status);
- }
- else // abnormal termination?
- {
- wxASSERT_MSG( WIFSIGNALED(status),
- _T("unexpected child wait status") );
- exitcode = -1;
- }
- }
- }
- else // !wxEXEC_NOEVENTS
- {
- // endProcData->pid will be set to 0 from GTK_EndProcessDetector when the
- // process terminates
- while ( endProcData->pid != 0 )
- {
- bool idle = true;
+// helper function which calls waitpid() and analyzes the result
+int DoWaitForChild(int pid, int flags = 0)
+{
+ wxASSERT_MSG( pid > 0, "invalid PID" );
-#if HAS_PIPE_INPUT_STREAM
- if ( execData.bufOut )
- {
- execData.bufOut->Update();
- idle = false;
- }
+ int status, rc;
- if ( execData.bufErr )
- {
- execData.bufErr->Update();
- idle = false;
- }
-#endif // HAS_PIPE_INPUT_STREAM
+ // loop while we're getting EINTR
+ for ( ;; )
+ {
+ rc = waitpid(pid, &status, flags);
- // don't consume 100% of the CPU while we're sitting in this
- // loop
- if ( idle )
- wxMilliSleep(1);
+ if ( rc != -1 || errno != EINTR )
+ break;
+ }
- // give GTK+ a chance to call GTK_EndProcessDetector here and
- // also repaint the GUI
- wxYield();
- }
+ if ( rc == 0 )
+ {
+ // This can only happen if the child application closes our dummy pipe
+ // that is used to monitor its lifetime; in that case, our best bet is
+ // to pretend the process did terminate, because otherwise wxExecute()
+ // would hang indefinitely (OnReadWaiting() won't be called again, the
+ // descriptor is closed now).
+ wxLogDebug("Child process (PID %d) still alive but pipe closed so "
+ "generating a close notification", pid);
+ }
+ else if ( rc == -1 )
+ {
+ wxLogLastError(wxString::Format("waitpid(%d)", pid));
+ }
+ else // child did terminate
+ {
+ wxASSERT_MSG( rc == pid, "unexpected waitpid() return value" );
- exitcode = endProcData->exitcode;
+ if ( WIFEXITED(status) )
+ return WEXITSTATUS(status);
+ else if ( WIFSIGNALED(status) )
+ return -WTERMSIG(status);
+ else
+ {
+ wxLogError("Child process (PID %d) exited for unknown reason, "
+ "status = %d", pid, status);
}
+ }
+
+ return -1;
+}
- delete wd;
- delete endProcData;
+} // anonymous namespace
- return exitcode;
- }
- else // async execution
+int wxAppTraits::WaitForChild(wxExecuteData& execData)
+{
+ if ( !(execData.flags & wxEXEC_SYNC) )
{
+ // asynchronous execution: just launch the process and return,
+ // endProcData will be destroyed when it terminates (currently we leak
+ // it if the process doesn't terminate before we do and this should be
+ // fixed but it's not a real leak so it's not really very high
+ // priority)
+ wxEndProcessData *endProcData = new wxEndProcessData;
+ endProcData->process = execData.process;
+ endProcData->pid = execData.pid;
+ endProcData->tag = AddProcessCallback
+ (
+ endProcData,
+ execData.GetEndProcReadFD()
+ );
+ endProcData->async = true;
+
return execData.pid;
}
-}
+ //else: synchronous execution case
+
+#if wxUSE_STREAMS
+ wxProcess * const process = execData.process;
+ if ( process && process->IsRedirected() )
+ {
+ // we can't simply block waiting for the child to terminate as we would
+ // dead lock if it writes more than the pipe buffer size (typically
+ // 4KB) bytes of output -- it would then block waiting for us to read
+ // the data while we'd block waiting for it to terminate
+ //
+ // so multiplex here waiting for any input from the child or closure of
+ // the pipe used to indicate its termination
+ wxSelectDispatcher disp;
+
+ wxEndHandler endHandler(disp, execData.GetEndProcReadFD());
-#endif // wxUSE_GUI
-#if wxUSE_BASE
+ wxRedirectedIOHandler outHandler(disp, execData.fdOut, execData.bufOut),
+ errHandler(disp, execData.fdErr, execData.bufErr);
-void wxHandleProcessTermination(wxEndProcessData *proc_data)
+ while ( !endHandler.Terminated() )
+ {
+ disp.Dispatch();
+ }
+ }
+ //else: no IO redirection, just block waiting for the child to exit
+#endif // wxUSE_STREAMS
+
+ return DoWaitForChild(execData.pid);
+}
+
+void wxHandleProcessTermination(wxEndProcessData *data)
{
+ data->exitcode = DoWaitForChild(data->pid, WNOHANG);
+
// notify user about termination if required
- if ( proc_data->process )
+ if ( data->process )
{
- proc_data->process->OnTerminate(proc_data->pid, proc_data->exitcode);
+ data->process->OnTerminate(data->pid, data->exitcode);
}
- // clean up
- if ( proc_data->pid > 0 )
+ if ( data->async )
{
- delete proc_data;
+ // in case of asynchronous execution we don't need this data any more
+ // after the child terminates
+ delete data;
}
- else
+ else // sync execution
{
- // let wxExecute() know that the process has terminated
- proc_data->pid = 0;
+ // let wxExecute() know that the process has terminated
+ data->pid = 0;
}
}
-#endif // wxUSE_BASE
projects / wxWidgets.git / blobdiff