Method getState

src/processinfo.cpp:630–674

}

void
ProcessInfo::getState()
{
  JASSERT(pid == getpid()) (pid) (getpid());

  gid = getpgid(0);
  sid = getsid(0);

  fgid = -1;

  // Try to open the controlling terminal
  int tfd = _real_open("/dev/tty", O_RDWR);
  if (tfd != -1) {
    fgid = tcgetpgrp(tfd);
    _real_close(tfd);
  }

  if (ppid != getppid()) {
    // Our original parent died; we are the root of the process tree now.
    //
    // On older systems, a process is inherited by init (pid = 1) after its
    // parent dies. However, with the new per-user init process, the parent
    // pid is no longer "1"; it's the pid of the user-specific init process.
    ppid = getppid();
    isRootOfProcessTree = true;
    uppid = UniquePid();
  } else {
    uppid = UniquePid::ParentProcess();
  }

  string procSelfExeStr = jalib::Filesystem::ResolveSymlink("/proc/self/exe");
  strncpy(procSelfExe, procSelfExeStr.c_str(), sizeof(procSelfExe) - 1);

  strncpy(procname, jalib::Filesystem::GetProgramName().c_str(), sizeof(procname) -1);
  _hostname = jalib::Filesystem::GetCurrentHostname();
  upid = UniquePid::ThisProcess();

  char buf[PATH_MAX];
  JASSERT(getcwd(buf, sizeof buf) != NULL);
  _ckptCWD = buf;

  savedBrk = (uint64_t) sbrk(0);

  JTRACE("CHECK GROUP PID")(gid)(fgid)(ppid)(pid);
}

// NOTE: ProcessInfo object acts as the checkpoint header for DMTCP.
void