i2pd/DaemonLinux.cpp

128 lines
2.6 KiB
C++

#include "Daemon.h"
#ifndef _WIN32
#include <signal.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
#include "Log.h"
#include "util.h"
void handle_signal(int sig)
{
switch (sig)
{
case SIGHUP:
LogPrint(eLogInfo, "Daemon: Got SIGHUP, doing nothing");
// TODO:
break;
case SIGABRT:
case SIGTERM:
case SIGINT:
Daemon.running = 0; // Exit loop
break;
}
}
namespace i2p
{
namespace util
{
bool DaemonLinux::start()
{
if (isDaemon == 1)
{
pid_t pid;
pid = fork();
if (pid > 0) // parent
::exit (EXIT_SUCCESS);
if (pid < 0) // error
{
LogPrint(eLogError, "Daemon: could not fork: ", strerror(errno));
return false;
}
// child
umask(S_IWGRP | S_IRWXO); // 0027
int sid = setsid();
if (sid < 0)
{
LogPrint(eLogError, "Daemon: could not create process group.");
return false;
}
std::string d(i2p::util::filesystem::GetDataDir().string ()); // make a copy
if (chdir(d.c_str()) != 0)
{
LogPrint(eLogError, "Daemon: could not chdir: ", strerror(errno));
return false;
}
// close stdin/stdout/stderr descriptors
::close (0);
::open ("/dev/null", O_RDWR);
::close (1);
::open ("/dev/null", O_RDWR);
::close (2);
::open ("/dev/null", O_RDWR);
}
// Pidfile
// this code is c-styled and a bit ugly, but we need fd for locking pidfile
pidfile = i2p::util::config::GetArg("-pidfile", "");
if (pidfile == "") {
pidfile = IsService () ? "/var/run" : i2p::util::filesystem::GetDataDir().string();
pidfile.append("/i2pd.pid");
}
if (pidfile != "") {
pidFH = open(pidfile.c_str(), O_RDWR | O_CREAT, 0600);
if (pidFH < 0)
{
LogPrint(eLogError, "Daemon: could not create pid file ", pidfile, ": ", strerror(errno));
return false;
}
if (lockf(pidFH, F_TLOCK, 0) != 0)
{
LogPrint(eLogError, "Daemon: could not lock pid file ", pidfile, ": ", strerror(errno));
return false;
}
char pid[10];
sprintf(pid, "%d\n", getpid());
ftruncate(pidFH, 0);
if (write(pidFH, pid, strlen(pid)) < 0)
{
LogPrint(eLogError, "Daemon: could not write pidfile: ", strerror(errno));
return false;
}
}
// Signal handler
struct sigaction sa;
sa.sa_handler = handle_signal;
sigemptyset(&sa.sa_mask);
sa.sa_flags = SA_RESTART;
sigaction(SIGHUP, &sa, 0);
sigaction(SIGABRT, &sa, 0);
sigaction(SIGTERM, &sa, 0);
sigaction(SIGINT, &sa, 0);
return Daemon_Singleton::start();
}
bool DaemonLinux::stop()
{
unlink(pidfile.c_str());
return Daemon_Singleton::stop();
}
}
}
#endif