#include <errno.h>
#include <signal.h>
#include <sstream>
+#include <algorithm>
+#include <boost/algorithm/string/predicate.hpp>
+#include <boost/algorithm/string/trim.hpp>
#include "../Utils/Exception.hh"
#include "../Utils/membind.hh"
return daemonize_;
}
-prefix_ void senf::Daemon::consoleLog(std::string path, StdStream which)
+prefix_ void senf::Daemon::consoleLog(std::string const & path, StdStream which)
+{
+ switch (which) {
+ case StdOut : stdoutLog_ = path; break;
+ case StdErr : stderrLog_ = path; break;
+ case Both : stdoutLog_ = path; stderrLog_ = path; break;
+ }
+}
+
+
+prefix_ void senf::Daemon::openLog()
{
int fd (-1);
- if (! path.empty()) {
- int fd (::open(path.c_str(), O_WRONLY | O_APPEND));
+ if (! stdoutLog_.empty()) {
+ fd = ::open(stdoutLog_.c_str(), O_WRONLY | O_APPEND | O_CREAT, 0666);
if (fd < 0)
throwErrno("::open()");
- }
- switch (which) {
- case StdOut:
stdout_ = fd;
- break;
- case StdErr:
+ }
+ if (stderrLog_ == stdoutLog_)
stderr_ = fd;
- break;
- case Both:
- stdout_ = fd;
+ else if (! stderrLog_.empty()) {
+ fd = ::open(stdoutLog_.c_str(), O_WRONLY | O_APPEND | O_CREAT, 0666);
+ if (fd < 0)
+ throwErrno("::open()");
stderr_ = fd;
- break;
}
}
-prefix_ void senf::Daemon::pidFile(std::string f)
+prefix_ void senf::Daemon::pidFile(std::string const & f)
{
pidfile_ = f;
}
+namespace {
+ bool signaled (false);
+ void waitusr(int) {
+ signaled = true;
+ }
+}
+
prefix_ void senf::Daemon::detach()
{
if (daemonize_) {
+ // Wow .. ouch ..
+ // To ensure all data is written to the console log file in the correct order, we suspend
+ // execution here until the parent process tells us to continue via SIGUSR1: We block
+ // SIGUSR1 and install our own signal handler saving the old handler and signal mask. Then
+ // we close stdin/stderr which will send a HUP condition to the parent process. We wait for
+ // SIGUSR1 and reinstall the old signal mask and action.
+ ::sigset_t oldsig;
+ ::sigset_t usrsig;
+ ::sigemptyset(&usrsig);
+ LIBC_CALL( ::sigaddset, (&usrsig, SIGUSR1) );
+ LIBC_CALL( ::sigprocmask, (SIG_BLOCK, &usrsig, &oldsig) );
+ struct ::sigaction oldact;
+ struct ::sigaction usract;
+ ::memset(&usract, 0, sizeof(usract));
+ usract.sa_handler = &waitusr;
+ LIBC_CALL( ::sigaction, (SIGUSR1, &usract, &oldact) );
+ ::sigset_t waitsig (oldsig);
+ LIBC_CALL( ::sigdelset, (&waitsig, SIGUSR1) );
+
LIBC_CALL_RV( nul, ::open, ("/dev/null", O_WRONLY) );
- LIBC_CALL( ::dup2, (nul, 1) );
- LIBC_CALL( ::dup2, (nul, 2) );
+ LIBC_CALL( ::dup2, (stdout_ == -1 ? nul : stdout_, 1) );
+ LIBC_CALL( ::dup2, (stderr_ == -1 ? nul : stderr_, 2) );
LIBC_CALL( ::close, (nul) );
+
+ signaled = false;
+ while (! signaled) {
+ ::sigsuspend(&waitsig);
+ if (errno != EINTR)
+ throwErrno("::sigsuspend()");
+ }
+
+ LIBC_CALL( ::sigaction, (SIGUSR1, &oldact, 0) );
+ LIBC_CALL( ::sigprocmask, (SIG_SETMASK, &oldsig, 0) );
}
}
argv_ = argv;
# ifdef NDEBUG
+
try {
+
# endif
configure();
- if (daemonize_)
+ if (daemonize_) {
+ openLog();
fork();
+ }
if (! pidfile_.empty() && ! pidfileCreate()) {
std::cerr << "\n*** PID file '" << pidfile_ << "' creation failed. Daemon running ?"
<< std::endl;
main();
# ifdef NDEBUG
+
}
catch (std::exception & e) {
std::cerr << "\n*** Fatal exception: " << e.what() << std::endl;
std::cerr << "\n*** Fatal exception: (unknown)" << std::endl;
return 1;
}
+
# endif
return 0;
// private members
prefix_ void senf::Daemon::configure()
-{}
+{
+ for (int i (1); i<argc_; ++i) {
+ if (argv_[i] == std::string("--no-daemon"))
+ daemonize(false);
+ else if (boost::starts_with(argv_[i], std::string("--console-log="))) {
+ std::string arg (std::string(argv_[i]), 14u);
+ std::string::size_type komma (arg.find(','));
+ if (komma == std::string::npos) {
+ boost::trim(arg);
+ consoleLog(arg);
+ } else {
+ std::string arg1 (arg,0,komma);
+ std::string arg2 (arg,komma+1);
+ boost::trim(arg1);
+ boost::trim(arg2);
+ if (arg1 == std::string("none")) consoleLog("",StdOut);
+ else if (! arg1.empty() ) consoleLog(arg1, StdOut);
+ if (arg2 == std::string("none")) consoleLog("",StdErr);
+ else if (! arg2.empty() ) consoleLog(arg2, StdErr);
+ }
+ }
+ else if (boost::starts_with(argv_[i], std::string("--pid-file=")))
+ pidFile(std::string(std::string(argv_[i]), 11u));
+ }
+}
prefix_ void senf::Daemon::main()
{
LIBC_CALL( ::close, (coutpipe[1]) );
LIBC_CALL( ::close, (cerrpipe[1]) );
- detail::DaemonWatcher watcher (pid, coutpipe[0], cerrpipe[0]);
+ detail::DaemonWatcher watcher (pid, coutpipe[0], cerrpipe[0], stdout_, stderr_);
watcher.run();
::_exit(0);
///////////////////////////////////////////////////////////////////////////
// senf::detail::DaemonWatcher
-prefix_ senf::detail::DaemonWatcher::DaemonWatcher(int pid, int coutpipe, int cerrpipe)
- : childPid_(pid), coutpipe_(coutpipe), cerrpipe_(cerrpipe), sigChld_(false),
- coutForwarder_(coutpipe_, 1, boost::bind(&DaemonWatcher::pipeClosed, this, 1)),
- cerrForwarder_(cerrpipe_, 2, boost::bind(&DaemonWatcher::pipeClosed, this, 2))
-{}
+prefix_ senf::detail::DaemonWatcher::DaemonWatcher(int pid, int coutpipe, int cerrpipe,
+ int stdout, int stderr)
+ : childPid_(pid), coutpipe_(coutpipe), cerrpipe_(cerrpipe), stdout_(stdout),
+ stderr_(stderr), sigChld_(false),
+ coutForwarder_(coutpipe_, boost::bind(&DaemonWatcher::pipeClosed, this, 1)),
+ cerrForwarder_(cerrpipe_, boost::bind(&DaemonWatcher::pipeClosed, this, 2))
+{
+ coutForwarder_.addTarget(1);
+ if (stdout_ >= 0)
+ coutForwarder_.addTarget(stdout_);
+ cerrForwarder_.addTarget(2);
+ if (stderr_ >= 0)
+ cerrForwarder_.addTarget(stderr_);
+}
prefix_ void senf::detail::DaemonWatcher::run()
{
if (coutpipe_ == -1 && cerrpipe_ == -1) {
if (sigChld_)
childDied(); // does not return
+ if (::kill(childPid_, SIGUSR1) < 0)
+ if (errno != ESRCH) throwErrno("::kill()");
Scheduler::instance().timeout(
Scheduler::instance().eventTime() + ClockService::seconds(1),
senf::membind(&DaemonWatcher::childOk, this));
///////////////////////////////////////////////////////////////////////////
// senf::detail::DaemonWatcher::Forwarder
-prefix_ senf::detail::DaemonWatcher::Forwarder::Forwarder(int src, int dst, Callback cb)
- : src_(src), dst_(dst), cb_(cb)
+prefix_ senf::detail::DaemonWatcher::Forwarder::Forwarder(int src, Callback cb)
+ : src_(src), cb_(cb)
{
Scheduler::instance().add(src_, senf::membind(&Forwarder::readData, this),
Scheduler::EV_READ);
{
if (src_ != -1)
Scheduler::instance().remove(src_);
- if (dst_ != -1 && ! buffer_.empty())
- Scheduler::instance().remove(dst_);
+
+ for (Targets::iterator i (targets_.begin()); i != targets_.end(); ++i)
+ if (i->offset >= buffer_.size())
+ Scheduler::instance().remove(i->fd);
+}
+
+prefix_ void senf::detail::DaemonWatcher::Forwarder::addTarget(int fd)
+{
+ Target target = { fd, 0 };
+ targets_.push_back(target);
}
prefix_ void senf::detail::DaemonWatcher::Forwarder::readData(Scheduler::EventId event)
{
char buf[1024];
int n (0);
+
while (1) {
n = ::read(src_,buf,1024);
if (n<0) {
} else
break;
}
+
if (n == 0) {
// Hangup
Scheduler::instance().remove(src_);
src_ = -1;
return;
}
- if (dst_ == -1)
- // There was an error writing data -> drop it
+
+ if (targets_.empty())
return;
- if (buffer_.empty())
- Scheduler::instance().add(dst_, senf::membind(&Forwarder::writeData, this),
- Scheduler::EV_WRITE);
+
+ for (Targets::iterator i (targets_.begin()); i != targets_.end(); ++i)
+ if (i->offset >= buffer_.size())
+ Scheduler::instance().add( i->fd,
+ boost::bind(&Forwarder::writeData, this, _1, i),
+ Scheduler::EV_WRITE );
+
buffer_.insert(buffer_.end(), buf, buf+n);
}
-prefix_ void senf::detail::DaemonWatcher::Forwarder::writeData(Scheduler::EventId event)
+prefix_ void senf::detail::DaemonWatcher::Forwarder::writeData(Scheduler::EventId event,
+ Targets::iterator target)
{
if (event != Scheduler::EV_WRITE) {
// Broken pipe while writing data ? Not much, we can do here, we just drop the data
- Scheduler::instance().remove(dst_);
- dst_ = -1;
- if (src_ == -1) cb_();
+ Scheduler::instance().remove(target->fd);
+ targets_.erase(target);
+ if (targets_.empty() && src_ == -1)
+ cb_();
return;
}
+
char buf[1024];
- int n (buffer_.size() > 1024 ? 1024 : buffer_.size());
- std::copy(buffer_.begin(), buffer_.begin() + n, buf);
- int w (::write(dst_, buf, n));
+ int n (buffer_.size() - target->offset > 1024 ? 1024 : buffer_.size() - target->offset);
+ std::copy(buffer_.begin() + target->offset, buffer_.begin() + target->offset + n, buf);
+
+ int w (::write(target->fd, buf, n));
if (w < 0) {
if (errno != EINTR) throwErrno("::write()");
return;
}
- buffer_.erase(buffer_.begin(), buffer_.begin()+w);
- if (buffer_.empty()) {
- Scheduler::instance().remove(dst_);
- if (src_ == -1)
- cb_();
- }
+ target->offset += w;
+
+ n = std::min_element(
+ targets_.begin(), targets_.end(),
+ boost::bind(&Target::offset, _1) < boost::bind(&Target::offset, _2))->offset;
+
+ buffer_.erase(buffer_.begin(), buffer_.begin()+n);
+
+ for (Targets::iterator i (targets_.begin()); i != targets_.end(); ++i)
+ i->offset -= n;
+
+ if (target->offset >= buffer_.size())
+ Scheduler::instance().remove(target->fd);
+ if (src_ == -1 && (buffer_.empty() || targets_.empty()))
+ cb_();
}
#undef LIBC_CALL
projects / senf.git / blobdiff