63 lines
1.7 KiB
C++
63 lines
1.7 KiB
C++
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/*
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* This file is part of libgim.
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*
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* libgim is free software: you can redistribute it and/or modify it under the
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* terms of the GNU General Public License as published by the Free Software
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* Foundation, either version 3 of the License, or (at your option) any later
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* version.
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*
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* libgim is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License
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* along with libgim. If not, see <http://www.gnu.org/licenses/>.
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*
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* Copyright 2010-2012 Danny Robson <danny@nerdcruft.net>
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*/
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#include "exe.hpp"
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#include "platform.hpp"
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#ifdef PLATFORM_LINUX
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#include "types.hpp"
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#include "except.hpp"
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <unistd.h>
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#include <stdexcept>
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#include <vector>
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boost::filesystem::path
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util::image_path (void) {
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static const char PROC_SELF[] = "/proc/self/exe";
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// We can't use lstat to check the size of the link in proc, as Linux
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// will return 0 for most entries under proc. Instead we've got to
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// iterate for a correct size.
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std::vector<char> resolved (256);
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retry:
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const auto written = readlink (PROC_SELF, resolved.data (), resolved.size ());
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if (written < 0)
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errno_error::throw_code ();
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if (sign_cast<size_t> (written) == resolved.size ()) {
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resolved.resize (resolved.size () * 2);
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goto retry;
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}
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return boost::filesystem::path (resolved.data (), resolved.data () + written);
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}
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#else
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#error "Unknown platform"
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#endif
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