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// Copyright (C) 2014, 2015 Internet Systems Consortium, Inc. ("ISC")
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
// OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
// PERFORMANCE OF THIS SOFTWARE.
#include <config.h>
#include <cc/data.h>
#include <dhcpsrv/cfgmgr.h>
#include <dhcpsrv/daemon.h>
#include <exceptions/exceptions.h>
#include <log/logger_name.h>
#include <log/logger_support.h>
#include <logging.h>
#include <util/filename.h>
#include <boost/bind.hpp>
#include <sstream>
#include <errno.h>
/// @brief provides default implementation for basic daemon operations
///
/// This file provides stub implementations that are expected to be redefined
/// in derived classes (e.g. ControlledDhcpv6Srv)
namespace isc {
namespace dhcp {
Daemon::Daemon()
: signal_set_(), signal_handler_(), config_file_(""), proc_name_(""),
pid_file_dir_(DHCP_DATA_DIR), pid_file_(), am_file_author_(false) {
// The pid_file_dir can be overridden via environment variable
// This is primarily intended to simplify testing
const char* const env = getenv("KEA_PIDFILE_DIR");
if (env) {
pid_file_dir_ = env;
}
}
Daemon::~Daemon() {
if (pid_file_ && am_file_author_) {
pid_file_->deleteFile();
}
}
void Daemon::cleanup() {
}
void Daemon::shutdown() {
}
void Daemon::handleSignal() {
if (signal_set_ && signal_handler_) {
signal_set_->handleNext(boost::bind(signal_handler_, _1));
}
}
void Daemon::configureLogger(const isc::data::ConstElementPtr& log_config,
const SrvConfigPtr& storage) {
if (log_config) {
isc::data::ConstElementPtr loggers = log_config->get("loggers");
if (loggers) {
LogConfigParser parser(storage);
parser.parseConfiguration(loggers, CfgMgr::instance().isVerbose());
}
}
}
void
Daemon::setVerbose(bool verbose) {
CfgMgr::instance().setVerbose(verbose);
}
bool
Daemon::getVerbose() const {
return (CfgMgr::instance().isVerbose());
}
void Daemon::loggerInit(const char* name, bool verbose) {
setenv("KEA_LOGGER_DESTINATION", "stdout", 0);
// Initialize logger system
isc::log::initLogger(name, isc::log::DEBUG, isc::log::MAX_DEBUG_LEVEL,
NULL);
// Apply default configuration (log INFO or DEBUG to stdout)
isc::log::setDefaultLoggingOutput(verbose);
}
std::string Daemon::getVersion(bool /*extended*/) {
isc_throw(isc::NotImplemented, "Daemon::getVersion() called");
}
std::string
Daemon::getConfigFile() const {
return (config_file_);
}
void
Daemon::setConfigFile(const std::string& config_file) {
config_file_ = config_file;
}
std::string
Daemon::getProcName() const {
return (proc_name_);
};
void
Daemon::setProcName(const std::string& proc_name) {
proc_name_ = proc_name;
}
std::string
Daemon::getPIDFileDir() const {
return(pid_file_dir_);
}
void
Daemon::setPIDFileDir(const std::string& pid_file_dir) {
pid_file_dir_ = pid_file_dir;
}
std::string
Daemon::getPIDFileName() const {
if (pid_file_) {
return (pid_file_->getFilename());
}
return ("");
};
void
Daemon::setPIDFileName(const std::string& pid_file_name) {
if (pid_file_) {
isc_throw(isc::InvalidOperation, "Daemon::setConfigFile"
" file name already set to:" << pid_file_->getFilename());
}
if (pid_file_name.empty()) {
isc_throw(isc::BadValue, "Daemon::setPIDFileName"
" file name may not be empty");
}
pid_file_.reset(new util::PIDFile(pid_file_name));
};
std::string
Daemon::makePIDFileName() const {
if (config_file_.empty()) {
isc_throw(isc::InvalidOperation,
"Daemon::makePIDFileName config file name is not set");
}
if (proc_name_.empty()) {
isc_throw(isc::InvalidOperation,
"Daemon::makePIDFileName process name is not set");
}
// Create Filename instance from the config_file_ pathname, so we can
// extract the fname component.
isc::util::Filename file(config_file_);
if (file.name().empty()) {
isc_throw(isc::BadValue, "Daemon::makePIDFileName config file:"
<< config_file_ << " is missing file name");
}
// Make the pathname for the PID file from the runtime directory,
// configuration name and process name.
std::ostringstream stream;
stream << pid_file_dir_ << "/" << file.name()
<< "." << proc_name_ << ".pid";
return(stream.str());
};
void
Daemon::createPIDFile(int pid) {
// If pid_file_ hasn't been instantiated explicitly, then do so
// using the default name.
if (!pid_file_) {
setPIDFileName(makePIDFileName());
}
// If we find a pre-existing file containing a live PID we bail.
int chk_pid = pid_file_->check();
if (chk_pid > 0) {
isc_throw(DaemonPIDExists, "Daemon::createPIDFile: PID: " << chk_pid
<< " exists, PID file: " << getPIDFileName());
}
if (pid == 0) {
// Write the PID of the current process
pid_file_->write();
} else {
// Write the PID we were given
pid_file_->write(pid);
}
am_file_author_ = true;
}
};
};
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