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81 lines
2.6 KiB
C++
81 lines
2.6 KiB
C++
/*
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* Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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#include <sys/stat.h>
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#include <unistd.h>
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#include <mach-o/dyld.h>
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#include "FileUtils.h"
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#include "ErrorHandling.h"
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namespace SysInfo {
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tstring getRealPath(const std::vector<char>& in) {
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std::vector<char> out(PATH_MAX);
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struct stat sb;
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if (lstat(in.data(), &sb) == -1) {
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JP_THROW(tstrings::any() << "lstat(" << in.data()
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<< ") failed. Error: " << lastCRTError());
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}
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// readlink() will fail if called on real path, so if we have real path, then just
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// use it
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if (!S_ISLNK(sb.st_mode)) {
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return tstring(in.data(), in.size() - 1 /* don't count trailing '0' */);
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}
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// Get real path, since _NSGetExecutablePath can return symbolic link
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ssize_t len = readlink(in.data(), out.data(), PATH_MAX);
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if (len < 0) {
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JP_THROW(tstrings::any() << "readlink(" << in.data()
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<< ") failed. Error: " << lastCRTError());
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}
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return tstring(out.data(), len);
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}
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tstring getProcessModulePath() {
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std::vector<char> buffer;
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uint32_t bufferSize = 0;
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do {
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int len = _NSGetExecutablePath(buffer.data(), &bufferSize);
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if (len == 0) {
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break;
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}
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if (len > 0) {
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JP_THROW(tstrings::any() << "_NSGetExecutablePath() failed");
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}
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buffer.resize(bufferSize);
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} while (true);
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tstring reply = getRealPath(buffer);
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return FileUtils::toAbsolutePath(reply);
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}
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} // end of namespace SysInfo
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