Capture lilv messages to log files.

Fixes dev-build warnings and build-machine errors.

src/StdErrorCapture.cpp

@@ -0,0 +1,101 @@
+// Copyright (c) 2022 Robin Davies
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy of
+// this software and associated documentation files (the "Software"), to deal in
+// the Software without restriction, including without limitation the rights to
+// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+// the Software, and to permit persons to whom the Software is furnished to do so,
+// subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+
+#include "StdErrorCapture.hpp"
+#include <cstdio>
+#include <unistd.h>
+#include <fcntl.h>
+#include <filesystem>
+#include <sstream>
+#include <fstream>
+#include <sys/stat.h>
+
+#ifdef __WIN32__
+
+#define dup _dup
+#define dup2 _dup2
+
+#endif
+
+
+using namespace pipedal;
+
+constexpr int STDOUT_HANDLE = 2;
+StdErrorCapture::StdErrorCapture()
+{
+    char filename[] = "/tmp/pipedal.XXXXXX";
+    int redirectHandle = mkstemp(filename);
+    this->tempFileName = filename;
+
+    this->oldStdout = dup(STDOUT_HANDLE);
+    dup2(redirectHandle,STDOUT_HANDLE);
+    close(redirectHandle);
+
+
+}
+StdErrorCapture::~StdErrorCapture()
+{
+    EndCapture();
+    if (tempFileName.length() != 0)
+    {
+        remove(tempFileName.c_str());
+    }
+}
+
+void StdErrorCapture::EndCapture()
+{
+
+    if (this->oldStdout != -1)
+    {
+        dup2(this->oldStdout,STDOUT_HANDLE);
+        close(this->oldStdout);
+        this->oldStdout = -1;
+        chmod(this->tempFileName.c_str(),0644);
+    }
+}
+
+std::vector<std::string> StdErrorCapture::GetOutputLines() {
+    EndCapture();
+
+    std::vector<std::string> result;
+
+    std::ifstream f(this->tempFileName);
+
+    if (f.is_open())
+    {
+        char buffer[1024];
+
+        std::string line;
+        while (true)
+        {
+            if (f.eof())
+            {
+                break;
+            }
+            std::getline(f,line);
+            if (f.fail()) break;
+            if (line.length() != 0)
+            {
+                result.push_back(line);
+            }
+        }
+    }
+    return result;
+}