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145 lines
4.0 KiB
C++
145 lines
4.0 KiB
C++
// Copyright (c) 2018, The Monero Project
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification, are
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// permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice, this list of
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// conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
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// of conditions and the following disclaimer in the documentation and/or other
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// materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its contributors may be
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// used to endorse or promote products derived from this software without specific
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// prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include <errno.h>
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#include <unistd.h>
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#include <sys/types.h>
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#ifdef _WIN32
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#include <boost/algorithm/string/join.hpp>
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#include <boost/scope_exit.hpp>
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#include <windows.h>
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#else
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#include <sys/wait.h>
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#endif
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#include "misc_log_ex.h"
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#include "util.h"
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#include "spawn.h"
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namespace tools
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{
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int spawn(const char *filename, const std::vector<std::string>& args, bool wait)
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{
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#ifdef _WIN32
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std::string joined = boost::algorithm::join(args, " ");
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char *commandLine = !joined.empty() ? &joined[0] : nullptr;
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STARTUPINFOA si = {};
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si.cb = sizeof(si);
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PROCESS_INFORMATION pi;
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if (!CreateProcessA(filename, commandLine, nullptr, nullptr, false, 0, nullptr, nullptr, &si, &pi))
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{
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MERROR("CreateProcess failed. Error code " << GetLastError());
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return -1;
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}
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BOOST_SCOPE_EXIT(&pi)
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{
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CloseHandle(pi.hThread);
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CloseHandle(pi.hProcess);
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}
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BOOST_SCOPE_EXIT_END
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if (!wait)
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{
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return 0;
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}
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DWORD result = WaitForSingleObject(pi.hProcess, INFINITE);
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if (result != WAIT_OBJECT_0)
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{
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MERROR("WaitForSingleObject failed. Result " << result << ", error code " << GetLastError());
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return -1;
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}
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DWORD exitCode;
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if (!GetExitCodeProcess(pi.hProcess, &exitCode))
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{
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MERROR("GetExitCodeProcess failed. Error code " << GetLastError());
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return -1;
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}
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MINFO("Child exited with " << exitCode);
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return static_cast<int>(exitCode);
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#else
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char **argv = (char**)alloca(sizeof(char*) * (args.size() + 1));
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for (size_t n = 0; n < args.size(); ++n)
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argv[n] = (char*)args[n].c_str();
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argv[args.size()] = NULL;
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pid_t pid = fork();
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if (pid < 0)
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{
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MERROR("Error forking: " << strerror(errno));
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return -1;
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}
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// child
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if (pid == 0)
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{
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tools::closefrom(3);
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close(0);
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char *envp[] = {NULL};
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execve(filename, argv, envp);
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MERROR("Failed to execve: " << strerror(errno));
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return -1;
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}
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// parent
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if (pid > 0)
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{
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if (!wait)
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return 0;
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while (1)
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{
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int wstatus = 0;
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pid_t w = waitpid(pid, &wstatus, WUNTRACED | WCONTINUED);
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if (w < 0) {
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MERROR("Error waiting for child: " << strerror(errno));
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return -1;
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}
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if (WIFEXITED(wstatus))
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{
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MINFO("Child exited with " << WEXITSTATUS(wstatus));
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return WEXITSTATUS(wstatus);
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}
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if (WIFSIGNALED(wstatus))
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{
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MINFO("Child killed by " << WEXITSTATUS(wstatus));
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return WEXITSTATUS(wstatus);
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}
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}
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}
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MERROR("Secret passage found");
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return -1;
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#endif
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}
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}
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