detail/posix/search_path.hpp

0001 // Copyright (c) 2006, 2007 Julio M. Merino Vidal
0002 // Copyright (c) 2008 Ilya Sokolov, Boris Schaeling
0003 // Copyright (c) 2009 Boris Schaeling
0004 // Copyright (c) 2010 Felipe Tanus, Boris Schaeling
0005 // Copyright (c) 2011, 2012 Jeff Flinn, Boris Schaeling
0006 //
0007 // Distributed under the Boost Software License, Version 1.0. (See accompanying
0008 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0009
0010 #ifndef BOOST_PROCESS_POSIX_SEARCH_PATH_HPP
0011 #define BOOST_PROCESS_POSIX_SEARCH_PATH_HPP
0012
0013 #include <boost/process/detail/config.hpp>
0014 #include <boost/process/filesystem.hpp>
0015 #include <boost/tokenizer.hpp>
0016 #include <string>
0017 #include <stdexcept>
0018 #include <stdlib.h>
0019 #include <unistd.h>
0020
0021 namespace boost { namespace process { namespace detail { namespace posix {
0022
0023 inline boost::process::filesystem::path search_path(
0024         const boost::process::filesystem::path &filename,
0025         const std::vector<boost::process::filesystem::path> &path)
0026 {
0027     for (const boost::process::filesystem::path & pp : path)
0028     {
0029         auto p = pp / filename;
0030 #if defined(BOOST_PROCESS_USE_STD_FS)
0031         std::error_code ec;
0032 #else
0033         boost::system::error_code ec;
0034 #endif
0035         bool file = boost::process::filesystem::is_regular_file(p, ec);
0036         if (!ec && file && ::access(p.c_str(), X_OK) == 0)
0037             return p;
0038     }
0039     return "";
0040 }
0041
0042 }}}}
0043
0044 #endif