mirror of
https://github.com/XRPLF/rippled.git
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91 lines
2.3 KiB
C++
91 lines
2.3 KiB
C++
//------------------------------------------------------------------------------
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/*
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Copyright (c) 2011-2013, OpenCoin, Inc.
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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//==============================================================================
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#ifdef __unix__
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static pid_t pManager = static_cast<pid_t>(0);
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static pid_t pChild = static_cast<pid_t>(0);
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static void pass_signal(int a)
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{
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kill(pChild, a);
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}
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static void stop_manager(int)
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{
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kill(pChild, SIGINT);
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_exit(0);
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}
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bool HaveSustain()
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{
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return true;
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}
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std::string StopSustain()
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{
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if (getppid() != pManager)
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return std::string();
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kill(pManager, SIGHUP);
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return "Terminating monitor";
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}
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std::string DoSustain()
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{
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int childCount = 0;
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pManager = getpid();
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signal(SIGINT, stop_manager);
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signal(SIGHUP, stop_manager);
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signal(SIGUSR1, pass_signal);
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signal(SIGUSR2, pass_signal);
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while (1)
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{
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++childCount;
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pChild = fork();
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if (pChild == -1)
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_exit(0);
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if (pChild == 0)
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{
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setCallingThreadName("main");
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signal(SIGINT, SIG_DFL);
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signal(SIGHUP, SIG_DFL);
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signal(SIGUSR1, SIG_DFL);
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signal(SIGUSR2, SIG_DFL);
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return str(boost::format("Launching child %d") % childCount);;
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}
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setCallingThreadName(boost::str(boost::format("#%d") % childCount).c_str());
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do
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{
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int i;
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sleep(10);
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waitpid(-1, &i, 0);
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}
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while (kill(pChild, 0) == 0);
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rename("core", boost::str(boost::format("core.%d") % static_cast<int>(pChild)).c_str());
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rename("debug.log", boost::str(boost::format("debug.log.%d") % static_cast<int>(pChild)).c_str());
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}
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}
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#else
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bool HaveSustain() { return false; }
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std::string DoSustain() { return std::string(); }
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std::string StopSustain() { return std::string(); }
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#endif
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