Initial import from SVN

2014-03-09 10:58:52 +01:00
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+// Copyright (c) 2006, 2007 Julio M. Merino Vidal
+// Copyright (c) 2008 Ilya Sokolov, Boris Schaeling
+// Copyright (c) 2009 Boris Schaeling
+// Copyright (c) 2010 Felipe Tanus, Boris Schaeling
+// Copyright (c) 2011, 2012 Jeff Flinn, Boris Schaeling
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+#ifndef BOOST_PROCESS_POSIX_SEARCH_PATH_HPP
+#define BOOST_PROCESS_POSIX_SEARCH_PATH_HPP
+
+#include <boost/process/config.hpp>
+#include <boost/filesystem.hpp>
+#include <boost/tokenizer.hpp>
+#include <string>
+#include <stdexcept>
+#include <stdlib.h>
+#include <unistd.h>
+
+namespace boost { namespace process { namespace posix {
+
+inline std::string search_path(const std::string &filename,
+    std::string path = "")
+{
+    if (path.empty())
+    {
+        path = ::getenv("PATH");
+        if (path.empty())
+            BOOST_PROCESS_THROW(std::runtime_error(
+                "Environment variable PATH not found"));
+    }
+
+    std::string result;
+    typedef boost::tokenizer<boost::char_separator<char> > tokenizer;
+    boost::char_separator<char> sep(":");
+    tokenizer tok(path, sep);
+    for (tokenizer::iterator it = tok.begin(); it != tok.end(); ++it)
+    {
+        boost::filesystem::path p = *it;
+        p /= filename;
+        if (!::access(p.c_str(), X_OK))
+        {
+            result = p.string();
+            break;
+        }
+    }
+    return result;
+}
+
+}}}
+
+#endif