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133 lines
2.7 KiB
C++
133 lines
2.7 KiB
C++
#include "Daemon.h"
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#ifndef _WIN32
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#include <signal.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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#include "Log.h"
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#include "util.h"
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void handle_signal(int sig)
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{
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switch (sig)
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{
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case SIGHUP:
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if (i2p::util::config::GetArg("daemon", 0) == 1)
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{
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static bool first=true;
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if (first)
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{
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first=false;
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return;
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}
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}
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LogPrint(eLogInfo, "Daemon: Got SIGHUP, reloading config.");
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i2p::util::filesystem::ReadConfigFile(i2p::util::config::mapArgs, i2p::util::config::mapMultiArgs);
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break;
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case SIGABRT:
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case SIGTERM:
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case SIGINT:
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Daemon.running = 0; // Exit loop
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break;
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}
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}
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namespace i2p
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{
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namespace util
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{
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bool DaemonLinux::start()
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{
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if (isDaemon == 1)
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{
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pid_t pid;
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pid = fork();
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if (pid > 0) // parent
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::exit (EXIT_SUCCESS);
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if (pid < 0) // error
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{
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LogPrint(eLogError, "Daemon: could not fork: ", strerror(errno));
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return false;
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}
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// child
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umask(S_IWGRP | S_IRWXO); // 0027
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int sid = setsid();
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if (sid < 0)
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{
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LogPrint(eLogError, "Daemon: could not create process group.");
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return false;
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}
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std::string d(i2p::util::filesystem::GetDataDir().string ()); // make a copy
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if (chdir(d.c_str()) != 0)
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{
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LogPrint(eLogError, "Daemon: could not chdir: ", strerror(errno));
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return false;
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}
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// close stdin/stdout/stderr descriptors
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::close (0);
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::open ("/dev/null", O_RDWR);
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::close (1);
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::open ("/dev/null", O_RDWR);
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::close (2);
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::open ("/dev/null", O_RDWR);
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}
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// Pidfile
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// this code is c-styled and a bit ugly, but we need fd for locking pidfile
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pidfile = i2p::util::config::GetArg("pidfile", "");
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if (pidfile != "") {
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pidFH = open(pidfile.c_str(), O_RDWR | O_CREAT, 0600);
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if (pidFH < 0)
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{
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LogPrint(eLogError, "Daemon: could not create pid file ", pidfile, ": ", strerror(errno));
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return false;
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}
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if (lockf(pidFH, F_TLOCK, 0) != 0)
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{
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LogPrint(eLogError, "Daemon: could not lock pid file ", pidfile, ": ", strerror(errno));
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return false;
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}
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char pid[10];
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sprintf(pid, "%d\n", getpid());
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ftruncate(pidFH, 0);
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if (write(pidFH, pid, strlen(pid)) < 0)
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{
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LogPrint(eLogError, "Daemon: could not write pidfile: ", strerror(errno));
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return false;
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}
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}
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// Signal handler
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struct sigaction sa;
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sa.sa_handler = handle_signal;
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sigemptyset(&sa.sa_mask);
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sa.sa_flags = SA_RESTART;
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sigaction(SIGHUP, &sa, 0);
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sigaction(SIGABRT, &sa, 0);
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sigaction(SIGTERM, &sa, 0);
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sigaction(SIGINT, &sa, 0);
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return Daemon_Singleton::start();
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}
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bool DaemonLinux::stop()
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{
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unlink(pidfile.c_str());
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return Daemon_Singleton::stop();
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}
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}
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}
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#endif
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