static void
cleanupAgentsInBackground(vector<AgentWatcher *> &watchers) {
this_thread::disable_interruption di;
this_thread::disable_syscall_interruption dsi;
pid_t pid;
int e;
pid = fork();
if (pid == 0) {
// Child
vector<AgentWatcher *>::const_iterator it;
Timer timer(false);
fd_set fds, fds2;
int max, agentProcessesDone;
unsigned long long deadline = 30000; // miliseconds
// Wait until all agent processes have exited.
max = 0;
FD_ZERO(&fds);
for (it = watchers.begin(); it != watchers.end(); it++) {
FD_SET((*it)->getFeedbackFd(), &fds);
if ((*it)->getFeedbackFd() > max) {
max = (*it)->getFeedbackFd();
}
}
timer.start();
agentProcessesDone = 0;
while (agentProcessesDone != -1
&& agentProcessesDone < (int) watchers.size()
&& timer.elapsed() < deadline)
{
struct timeval timeout;
#ifdef FD_COPY
FD_COPY(&fds, &fds2);
#else
FD_ZERO(&fds2);
for (it = watchers.begin(); it != watchers.end(); it++) {
FD_SET((*it)->getFeedbackFd(), &fds2);
}
#endif
timeout.tv_sec = 0;
timeout.tv_usec = 10000;
agentProcessesDone = syscalls::select(max + 1, &fds2, NULL, NULL, &timeout);
if (agentProcessesDone > 0 && timer.elapsed() < deadline) {
usleep(10000);
}
}
if (agentProcessesDone == -1 || timer.elapsed() >= deadline) {
// An error occurred or we've waited long enough. Kill all the
// processes.
P_WARN("Some Phusion Passenger agent processes did not exit " <<
"in time, forcefully shutting down all.");
for (it = watchers.begin(); it != watchers.end(); it++) {
(*it)->forceShutdown();
}
} else {
P_DEBUG("All Phusion Passenger agent processes have exited.");
}
// Now clean up the server instance directory.
delete generation.get();
delete serverInstanceDir.get();
_exit(0);
} else if (pid == -1) {
// Error
e = errno;
throw SystemException("fork() failed", errno);
} else {
// Parent
// Let child process handle cleanup.
serverInstanceDir->detach();
generation->detach();
}
}
