| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: src/common/process.cpp |
| 3 | // Purpose: Process termination classes |
| 4 | // Author: Guilhem Lavaux |
| 5 | // Modified by: Vadim Zeitlin to check error codes, added Detach() method |
| 6 | // Created: 24/06/98 |
| 7 | // RCS-ID: $Id$ |
| 8 | // Copyright: (c) Guilhem Lavaux |
| 9 | // Licence: wxWindows licence |
| 10 | ///////////////////////////////////////////////////////////////////////////// |
| 11 | |
| 12 | // ============================================================================ |
| 13 | // declarations |
| 14 | // ============================================================================ |
| 15 | |
| 16 | // ---------------------------------------------------------------------------- |
| 17 | // headers |
| 18 | // ---------------------------------------------------------------------------- |
| 19 | |
| 20 | // For compilers that support precompilation, includes "wx.h". |
| 21 | #include "wx/wxprec.h" |
| 22 | |
| 23 | #ifdef __BORLANDC__ |
| 24 | #pragma hdrstop |
| 25 | #endif |
| 26 | |
| 27 | #include "wx/process.h" |
| 28 | |
| 29 | // ---------------------------------------------------------------------------- |
| 30 | // event tables and such |
| 31 | // ---------------------------------------------------------------------------- |
| 32 | |
| 33 | wxDEFINE_EVENT( wxEVT_END_PROCESS, wxProcessEvent ); |
| 34 | |
| 35 | IMPLEMENT_DYNAMIC_CLASS(wxProcess, wxEvtHandler) |
| 36 | IMPLEMENT_DYNAMIC_CLASS(wxProcessEvent, wxEvent) |
| 37 | |
| 38 | // ============================================================================ |
| 39 | // wxProcess implementation |
| 40 | // ============================================================================ |
| 41 | |
| 42 | // ---------------------------------------------------------------------------- |
| 43 | // wxProcess creation |
| 44 | // ---------------------------------------------------------------------------- |
| 45 | |
| 46 | void wxProcess::Init(wxEvtHandler *parent, int id, int flags) |
| 47 | { |
| 48 | if ( parent ) |
| 49 | SetNextHandler(parent); |
| 50 | |
| 51 | m_id = id; |
| 52 | m_pid = 0; |
| 53 | m_redirect = (flags & wxPROCESS_REDIRECT) != 0; |
| 54 | |
| 55 | #if wxUSE_STREAMS |
| 56 | m_inputStream = NULL; |
| 57 | m_errorStream = NULL; |
| 58 | m_outputStream = NULL; |
| 59 | #endif // wxUSE_STREAMS |
| 60 | } |
| 61 | |
| 62 | /* static */ |
| 63 | wxProcess *wxProcess::Open(const wxString& cmd, int flags) |
| 64 | { |
| 65 | wxASSERT_MSG( !(flags & wxEXEC_SYNC), wxT("wxEXEC_SYNC should not be used." )); |
| 66 | wxProcess *process = new wxProcess(wxPROCESS_REDIRECT); |
| 67 | long pid = wxExecute(cmd, flags, process); |
| 68 | if( !pid ) |
| 69 | { |
| 70 | // couldn't launch the process |
| 71 | delete process; |
| 72 | return NULL; |
| 73 | } |
| 74 | |
| 75 | process->SetPid(pid); |
| 76 | |
| 77 | return process; |
| 78 | } |
| 79 | |
| 80 | // ---------------------------------------------------------------------------- |
| 81 | // wxProcess termination |
| 82 | // ---------------------------------------------------------------------------- |
| 83 | |
| 84 | wxProcess::~wxProcess() |
| 85 | { |
| 86 | #if wxUSE_STREAMS |
| 87 | delete m_inputStream; |
| 88 | delete m_errorStream; |
| 89 | delete m_outputStream; |
| 90 | #endif // wxUSE_STREAMS |
| 91 | } |
| 92 | |
| 93 | void wxProcess::OnTerminate(int pid, int status) |
| 94 | { |
| 95 | wxProcessEvent event(m_id, pid, status); |
| 96 | |
| 97 | if ( !ProcessEvent(event) ) |
| 98 | delete this; |
| 99 | //else: the object which processed the event is responsible for deleting |
| 100 | // us! |
| 101 | } |
| 102 | |
| 103 | void wxProcess::Detach() |
| 104 | { |
| 105 | // we just detach from the next handler of the chain (i.e. our "parent" -- see ctor) |
| 106 | // not also from the previous handler like wxEvtHandler::Unlink() would do: |
| 107 | |
| 108 | if (m_nextHandler) |
| 109 | m_nextHandler->SetPreviousHandler(m_previousHandler); |
| 110 | |
| 111 | m_nextHandler = NULL; |
| 112 | } |
| 113 | |
| 114 | // ---------------------------------------------------------------------------- |
| 115 | // process IO redirection |
| 116 | // ---------------------------------------------------------------------------- |
| 117 | |
| 118 | #if wxUSE_STREAMS |
| 119 | |
| 120 | void wxProcess::SetPipeStreams(wxInputStream *inputSstream, |
| 121 | wxOutputStream *outputStream, |
| 122 | wxInputStream *errorStream) |
| 123 | { |
| 124 | m_inputStream = inputSstream; |
| 125 | m_errorStream = errorStream; |
| 126 | m_outputStream = outputStream; |
| 127 | } |
| 128 | |
| 129 | bool wxProcess::IsInputOpened() const |
| 130 | { |
| 131 | return m_inputStream && m_inputStream->GetLastError() != wxSTREAM_EOF; |
| 132 | } |
| 133 | |
| 134 | bool wxProcess::IsInputAvailable() const |
| 135 | { |
| 136 | return m_inputStream && m_inputStream->CanRead(); |
| 137 | } |
| 138 | |
| 139 | bool wxProcess::IsErrorAvailable() const |
| 140 | { |
| 141 | return m_errorStream && m_errorStream->CanRead(); |
| 142 | } |
| 143 | |
| 144 | #endif // wxUSE_STREAMS |
| 145 | |
| 146 | // ---------------------------------------------------------------------------- |
| 147 | // process killing |
| 148 | // ---------------------------------------------------------------------------- |
| 149 | |
| 150 | /* static */ |
| 151 | wxKillError wxProcess::Kill(int pid, wxSignal sig, int flags) |
| 152 | { |
| 153 | wxKillError rc; |
| 154 | (void)wxKill(pid, sig, &rc, flags); |
| 155 | |
| 156 | return rc; |
| 157 | } |
| 158 | |
| 159 | /* static */ |
| 160 | bool wxProcess::Exists(int pid) |
| 161 | { |
| 162 | switch ( Kill(pid, wxSIGNONE) ) |
| 163 | { |
| 164 | case wxKILL_OK: |
| 165 | case wxKILL_ACCESS_DENIED: |
| 166 | return true; |
| 167 | |
| 168 | default: |
| 169 | case wxKILL_ERROR: |
| 170 | case wxKILL_BAD_SIGNAL: |
| 171 | wxFAIL_MSG( wxT("unexpected wxProcess::Kill() return code") ); |
| 172 | // fall through |
| 173 | |
| 174 | case wxKILL_NO_PROCESS: |
| 175 | return false; |
| 176 | } |
| 177 | } |
| 178 | |