changed Mac Mouse Moved Hysteresis (area in which mouse movements do NOT generate...

[wxWidgets.git] / src / unix / utilsunx.cpp

diff --git a/src/unix/utilsunx.cpp b/src/unix/utilsunx.cpp
index 69d789cd61665b407250451d00e51c009fc59020..deeaa836bab486d1308dd1ef5077855bae05969f 100644 (file)
--- a/src/unix/utilsunx.cpp
+++ b/src/unix/utilsunx.cpp
@@ -32,6 +32,12 @@
     #include "wx/unix/execute.h"
 #endif
 
+// SGI signal.h defines signal handler arguments differently depending on
+// whether _LANGUAGE_C_PLUS_PLUS is set or not - do set it
+#if defined(__SGI__) && !defined(_LANGUAGE_C_PLUS_PLUS)
+    #define _LANGUAGE_C_PLUS_PLUS 1
+#endif // SGI hack
+
 #include <stdarg.h>
 #include <dirent.h>
 #include <string.h>
@@ -397,7 +403,14 @@ long wxExecute(wxChar **argv,
                bool sync,
                wxProcess *process)
 {
-    wxCHECK_MSG( *argv, 0, wxT("can't exec empty command") );
+    // for the sync execution, we return -1 to indicate failure, but for async
+    // case we return 0 which is never a valid PID
+    //
+    // we define this as a macro, not a variable, to avoid compiler warnings
+    // about "ERROR_RETURN_CODE value may be clobbered by fork()"
+    #define ERROR_RETURN_CODE ((sync) ? -1 : 0)
+
+    wxCHECK_MSG( *argv, ERROR_RETURN_CODE, wxT("can't exec empty command") );
 
 #if wxUSE_UNICODE
     int mb_argc = 0;
@@ -432,18 +445,22 @@ long wxExecute(wxChar **argv,
 
         ARGS_CLEANUP;
 
-        return 0;
+        return ERROR_RETURN_CODE;
     }
 #endif // wxUSE_GUI
 
-    int pipeIn[2];
-    int pipeOut[2];
+    // pipes for inter process communication
+    int pipeIn[2],      // stdin
+        pipeOut[2],     // stdout
+        pipeErr[2];     // stderr
+
     pipeIn[0] = pipeIn[1] =
-    pipeOut[0] = pipeOut[1] = -1;
+    pipeOut[0] = pipeOut[1] =
+    pipeErr[0] = pipeErr[1] = -1;
 
     if ( process && process->IsRedirected() )
     {
-        if ( pipe(pipeIn) == -1 || pipe(pipeOut) == -1 )
+        if ( pipe(pipeIn) == -1 || pipe(pipeOut) == -1 || pipe(pipeErr) == -1 )
         {
 #if wxUSE_GUI
             // free previously allocated resources
@@ -456,7 +473,7 @@ long wxExecute(wxChar **argv,
 
             ARGS_CLEANUP;
 
-            return 0;
+            return ERROR_RETURN_CODE;
         }
     }
 
@@ -476,13 +493,15 @@ long wxExecute(wxChar **argv,
         close(pipeIn[1]);
         close(pipeOut[0]);
         close(pipeOut[1]);
+        close(pipeErr[0]);
+        close(pipeErr[1]);
 #endif // wxUSE_GUI
 
         wxLogSysError( _("Fork failed") );
 
         ARGS_CLEANUP;
 
-        return 0;
+        return ERROR_RETURN_CODE;
     }
     else if ( pid == 0 )  // we're in child
     {
@@ -498,7 +517,7 @@ long wxExecute(wxChar **argv,
         {
             for ( int fd = 0; fd < FD_SETSIZE; fd++ )
             {
-                if ( fd == pipeIn[0] || fd == pipeOut[1]
+                if ( fd == pipeIn[0] || fd == pipeOut[1] || fd == pipeErr[1]
 #if wxUSE_GUI
                      || fd == end_proc_detect[1]
 #endif // wxUSE_GUI
@@ -514,19 +533,19 @@ long wxExecute(wxChar **argv,
             }
         }
 
-        // redirect stdio and stdout
-        // (TODO: what about stderr?)
+        // redirect stdio, stdout and stderr
         if ( pipeIn[0] != -1 )
         {
             if ( dup2(pipeIn[0], STDIN_FILENO) == -1 ||
-                 dup2(pipeOut[1], STDOUT_FILENO) == -1 )
+                 dup2(pipeOut[1], STDOUT_FILENO) == -1 ||
+                 dup2(pipeErr[1], STDERR_FILENO) == -1 )
             {
-                wxLogSysError(_("Failed to redirect child process "
-                                "input/output"));
+                wxLogSysError(_("Failed to redirect child process input/output"));
             }
 
             close(pipeIn[0]);
             close(pipeOut[1]);
+            close(pipeErr[1]);
         }
 
         execvp (*mb_argv, mb_argv);
@@ -544,10 +563,13 @@ long wxExecute(wxChar **argv,
             // These two streams are relative to this process.
             wxOutputStream *outStream = new wxProcessFileOutputStream(pipeIn[1]);
             wxInputStream *inStream = new wxProcessFileInputStream(pipeOut[0]);
+            wxInputStream *errStream = new wxProcessFileInputStream(pipeErr[0]);
+
             close(pipeIn[0]); // close reading side
             close(pipeOut[1]); // close writing side
+            close(pipeErr[1]); // close writing side
 
-            process->SetPipeStreams(inStream, outStream);
+            process->SetPipeStreams(inStream, outStream, errStream);
         }
 
 #if wxUSE_GUI
@@ -603,12 +625,18 @@ long wxExecute(wxChar **argv,
         return exitcode;
 #endif // wxUSE_GUI
     }
-
-    return 0;
-
-    #undef ARGS_CLEANUP
+#ifdef __VMS
+   // VMS does not recognise exit as a return and complains about
+   // a missing return
+   // I think VMS is wrong in this
+   //     JJ
+   return 0;
+#endif
 }
 
+#undef ERROR_RETURN_CODE
+#undef ARGS_CLEANUP
+
 // ----------------------------------------------------------------------------
 // file and directory functions
 // ----------------------------------------------------------------------------
@@ -616,9 +644,14 @@ long wxExecute(wxChar **argv,
 const wxChar* wxGetHomeDir( wxString *home  )
 {
     *home = wxGetUserHome( wxString() );
+   wxString tmp;
     if ( home->IsEmpty() )
         *home = wxT("/");
-
+#ifdef __VMS
+   tmp = *home;
+   if ( tmp.Last() != wxT(']'))
+     if ( tmp.Last() != wxT('/')) *home << wxT('/');
+#endif
     return home->c_str();
 }
 
@@ -840,6 +873,48 @@ long wxGetFreeMemory()
     return -1;
 }
 
+// ----------------------------------------------------------------------------
+// env vars
+// ----------------------------------------------------------------------------
+
+bool wxGetEnv(const wxString& var, wxString *value)
+{
+    // wxGetenv is defined as getenv()
+    wxChar *p = wxGetenv(var);
+    if ( !p )
+        return FALSE;
+
+    if ( value )
+    {
+        *value = p;
+    }
+
+    return TRUE;
+}
+
+bool wxSetEnv(const wxString& variable, const wxChar *value)
+{
+#if defined(HAVE_SETENV)
+    return setenv(variable.mb_str(), value ? wxString(value).mb_str().data()
+                                           : NULL, 1 /* overwrite */) == 0;
+#elif defined(HAVE_PUTENV)
+    wxString s = variable;
+    if ( value )
+        s << _T('=') << value;
+
+    // transform to ANSI
+    const char *p = s.mb_str();
+
+    // the string will be free()d by libc
+    char *buf = (char *)malloc(strlen(p) + 1);
+    strcpy(buf, p);
+
+    return putenv(buf) == 0;
+#else // no way to set an env var
+    return FALSE;
+#endif
+}
+
 // ----------------------------------------------------------------------------
 // signal handling
 // ----------------------------------------------------------------------------
@@ -848,7 +923,7 @@ long wxGetFreeMemory()
 
 #include <signal.h>
 
-static void wxFatalSignalHandler(int signal)
+static void wxFatalSignalHandler(wxTYPE_SA_HANDLER)
 {
     if ( wxTheApp )
     {