X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/308978f6aa40cd791d9ba0cd437a404e68d30734..abf6bdb7869559a5528428336cad5c698adbe6e4:/src/unix/utilsunx.cpp

diff --git a/src/unix/utilsunx.cpp b/src/unix/utilsunx.cpp
index 0c2e7f37d2..23658ace65 100644
--- a/src/unix/utilsunx.cpp
+++ b/src/unix/utilsunx.cpp
@@ -135,9 +135,39 @@ void wxUsleep(unsigned long milliseconds)
 // process management
 // ----------------------------------------------------------------------------
 
-int wxKill(long pid, wxSignal sig)
+int wxKill(long pid, wxSignal sig, wxKillError *rc)
 {
-    return kill((pid_t)pid, (int)sig);
+    int err = kill((pid_t)pid, (int)sig);
+    if ( rc )
+    {
+        switch ( err )
+        {
+            case 0:
+                *rc = wxKILL_OK;
+                break;
+
+            case EINVAL:
+                *rc = wxKILL_BAD_SIGNAL;
+                break;
+
+            case EPERM:
+                *rc = wxKILL_ACCESS_DENIED;
+                break;
+
+            case ESRCH:
+                *rc = wxKILL_NO_PROCESS;
+                break;
+
+            default:
+                // this goes against Unix98 docs so log it
+                wxLogDebug(_T("unexpected kill(2) return value %d"), err);
+
+                // something else...
+                *rc = wxKILL_ERROR;
+        }
+    }
+
+    return err;
 }
 
 #define WXEXECUTE_NARGS   127
@@ -404,10 +434,13 @@ long wxExecute(wxChar **argv,
                wxProcess *process)
 {
     // for the sync execution, we return -1 to indicate failure, but for async
-    // cse we return 0 which is never a valid PID
-    long errorRetCode = sync ? -1 : 0;
+    // 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, errorRetCode, wxT("can't exec empty command") );
+    wxCHECK_MSG( *argv, ERROR_RETURN_CODE, wxT("can't exec empty command") );
 
 #if wxUSE_UNICODE
     int mb_argc = 0;
@@ -442,7 +475,7 @@ long wxExecute(wxChar **argv,
 
         ARGS_CLEANUP;
 
-        return errorRetCode;
+        return ERROR_RETURN_CODE;
     }
 #endif // wxUSE_GUI
 
@@ -470,7 +503,7 @@ long wxExecute(wxChar **argv,
 
             ARGS_CLEANUP;
 
-            return errorRetCode;
+            return ERROR_RETURN_CODE;
         }
     }
 
@@ -498,7 +531,7 @@ long wxExecute(wxChar **argv,
 
         ARGS_CLEANUP;
 
-        return errorRetCode;
+        return ERROR_RETURN_CODE;
     }
     else if ( pid == 0 )  // we're in child
     {
@@ -631,6 +664,7 @@ long wxExecute(wxChar **argv,
 #endif
 }
 
+#undef ERROR_RETURN_CODE
 #undef ARGS_CLEANUP
 
 // ----------------------------------------------------------------------------
@@ -873,7 +907,7 @@ long wxGetFreeMemory()
 // env vars
 // ----------------------------------------------------------------------------
 
-bool wxGetEnv(const wxString& var, wxString *value);
+bool wxGetEnv(const wxString& var, wxString *value)
 {
     // wxGetenv is defined as getenv()
     wxChar *p = wxGetenv(var);