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198 lines
5.0 KiB
198 lines
5.0 KiB
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11 years ago
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#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 <thread>
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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 <sys/resource.h>
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#include "Config.h"
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#include "FS.h"
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#include "Log.h"
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#include "RouterContext.h"
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#include "ClientContext.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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LogPrint(eLogInfo, "Daemon: Got SIGHUP, reopening tunnel configuration...");
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i2p::client::context.ReloadConfig();
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break;
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case SIGUSR1:
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LogPrint(eLogInfo, "Daemon: Got SIGUSR1, reopening logs...");
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i2p::log::Logger().Reopen ();
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break;
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case SIGINT:
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if (i2p::context.AcceptsTunnels () && !Daemon.gracefulShutdownInterval)
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{
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i2p::context.SetAcceptsTunnels (false);
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Daemon.gracefulShutdownInterval = 10*60; // 10 minutes
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LogPrint(eLogInfo, "Graceful shutdown after ", Daemon.gracefulShutdownInterval, " seconds");
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}
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else
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Daemon.running = 0;
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break;
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case SIGABRT:
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case SIGTERM:
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Daemon.running = 0; // Exit loop
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break;
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case SIGPIPE:
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LogPrint(eLogInfo, "SIGPIPE received");
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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)
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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::fs::GetDataDir();
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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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// point std{in,out,err} descriptors to /dev/null
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freopen("/dev/null", "r", stdin);
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freopen("/dev/null", "w", stdout);
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freopen("/dev/null", "w", stderr);
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}
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// set proc limits
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struct rlimit limit;
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uint16_t nfiles; i2p::config::GetOption("limits.openfiles", nfiles);
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getrlimit(RLIMIT_NOFILE, &limit);
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if (nfiles == 0) {
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LogPrint(eLogInfo, "Daemon: using system limit in ", limit.rlim_cur, " max open files");
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} else if (nfiles <= limit.rlim_max) {
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limit.rlim_cur = nfiles;
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if (setrlimit(RLIMIT_NOFILE, &limit) == 0) {
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LogPrint(eLogInfo, "Daemon: set max number of open files to ",
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nfiles, " (system limit is ", limit.rlim_max, ")");
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} else {
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LogPrint(eLogError, "Daemon: can't set max number of open files: ", strerror(errno));
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}
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} else {
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LogPrint(eLogError, "Daemon: limits.openfiles exceeds system limit: ", limit.rlim_max);
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}
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uint32_t cfsize; i2p::config::GetOption("limits.coresize", cfsize);
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if (cfsize) // core file size set
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{
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cfsize *= 1024;
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getrlimit(RLIMIT_CORE, &limit);
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if (cfsize <= limit.rlim_max) {
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limit.rlim_cur = cfsize;
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if (setrlimit(RLIMIT_CORE, &limit) != 0) {
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LogPrint(eLogError, "Daemon: can't set max size of coredump: ", strerror(errno));
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} else if (cfsize == 0) {
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LogPrint(eLogInfo, "Daemon: coredumps disabled");
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} else {
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LogPrint(eLogInfo, "Daemon: set max size of core files to ", cfsize / 1024, "Kb");
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}
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} else {
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LogPrint(eLogError, "Daemon: limits.coresize exceeds system limit: ", limit.rlim_max);
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}
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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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std::string pidfile; i2p::config::GetOption("pidfile", pidfile);
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if (pidfile == "") {
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pidfile = i2p::fs::DataDirPath("i2pd.pid");
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}
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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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gracefulShutdownInterval = 0; // not specified
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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(SIGUSR1, &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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sigaction(SIGPIPE, &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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i2p::fs::Remove(pidfile);
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return Daemon_Singleton::stop();
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}
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void DaemonLinux::run ()
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{
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while (running)
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{
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std::this_thread::sleep_for (std::chrono::seconds(1));
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if (gracefulShutdownInterval)
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{
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gracefulShutdownInterval--; // - 1 second
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if (gracefulShutdownInterval <= 0)
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{
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LogPrint(eLogInfo, "Graceful shutdown");
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return;
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}
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}
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}
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}
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}
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}
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#endif
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