detail/posix/compare_handles.hpp

0001 // Copyright (c) 2016 Klemens D. Morgenstern
0002 //
0003 // Distributed under the Boost Software License, Version 1.0. (See accompanying
0004 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0005
0006 #ifndef BOOST_PROCESS_DETAIL_POSIX_COMPARE_HANDLES_HPP_
0007 #define BOOST_PROCESS_DETAIL_POSIX_COMPARE_HANDLES_HPP_
0008
0009
0010 #include <boost/process/detail/config.hpp>
0011 #include <sys/types.h>
0012 #include <sys/stat.h>
0013 #include <unistd.h>
0014
0015 namespace boost { namespace process { namespace detail { namespace posix {
0016
0017
0018 inline bool compare_handles(int lhs, int rhs)
0019 {
0020
0021     if ((lhs == -1) || (rhs == -1))
0022         return false;
0023
0024     if (lhs == rhs)
0025         return true;
0026
0027     struct stat stat1, stat2;
0028     if(fstat(lhs, &stat1) < 0) ::boost::process::detail::throw_last_error("fstat() failed");
0029     if(fstat(rhs, &stat2) < 0) ::boost::process::detail::throw_last_error("fstat() failed");
0030
0031     return (stat1.st_dev == stat2.st_dev) && (stat1.st_ino == stat2.st_ino);
0032 }
0033
0034
0035
0036
0037
0038 }}}}
0039
0040
0041
0042 #endif /* BOOST_PROCESS_DETAIL_POSIX_COMPARE_HANDLES_HPP_ */