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/* Copyright (C) 2011 Codership Oy <info@codership.com> */
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#include "garb_config.hpp"
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#include "garb_recv_loop.hpp"
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#include <galerautils.hpp>
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#include <stdlib.h> // exit()
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#include <unistd.h> // setsid(), chdir()
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#include <fcntl.h> // open()
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become_daemon () throw (gu::Exception)
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if (pid_t pid = fork())
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if (pid > 0) // parent
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// I guess we want this to go to stderr as well;
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std::cerr << "Failed to fork daemon process: "
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<< errno << " (" << strerror(errno) << ")";
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gu_throw_error(errno) << "Failed to fork daemon process";
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if (setsid()<0) // become a new process leader, detach from terminal
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gu_throw_error(errno) << "setsid() failed";
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if (chdir("/")) // detach from potentially removable block devices
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gu_throw_error(errno) << "chdir(\"/\") failed";
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// A second fork ensures the process cannot acquire a controlling
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if (pid_t pid = fork())
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gu_throw_error(errno) << "Second fork failed";
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// Close the standard streams. This decouples the daemon from the
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// terminal that started it.
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// Bind standard fds (0, 1, 2) to /dev/null
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for (int fd = 0; fd < 3; ++fd)
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if (open("/dev/null", O_RDONLY) < 0)
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gu_throw_error(errno) << "Unable to open /dev/null for fd " << fd;
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main (int argc, char* argv[])
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Config config(argc, argv);
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log_info << "Read config: " << config << std::endl;
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if (config.daemon()) become_daemon();
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RecvLoop loop (config);
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} /* namespace garb */
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main (int argc, char* argv[])
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return garb::main (argc, argv);
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catch (std::exception& e)
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log_fatal << e.what();
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garb/garb_main.cpp
