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killfamily.h

/***************************************************************
 *
 * Copyright (C) 1990-2007, Condor Team, Computer Sciences Department,
 * University of Wisconsin-Madison, WI.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you
 * may not use this file except in compliance with the License.  You may
 * obtain a copy of the License at
 * 
 *    http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 ***************************************************************/

#ifndef KILLFAMILY_H
#define KILLFAMILY_H

#include "extArray.h"
#include "condor_uid.h"
#include "condor_daemon_core.h"
#include "../condor_procapi/procapi.h"
#include "condor_pidenvid.h"

class ProcAPI;    // forward reference

class KillFamily : public Service {
public:
      
      KillFamily( pid_t pid, priv_state priv, int test_only = 0 );

      ~KillFamily();

      void hardkill();
      void softkill(int sig);
      void suspend();
      void resume();

            // get cpu usage of the family in seconds
      void get_cpu_usage(long & sys_time, long & user_time);

            // get the maxmimum family image size, in kbytes, seen
            // across all snapshots.  note this does _not_ generate
            // a call to takesnapshot() itself.
      void get_max_imagesize(unsigned long & max_image );

      int takesnapshot();

            // Allocates an array for all pids in the current pid family, 
            // sets the given pointer to that array, and returns the
            // number of pids  in the family.  The array must be
            // deallocated with delete.
      int         currentfamily( pid_t* & );    
      int         size() { return family_size; };
      
      void  display();        // dprintf's the existing pid family

      void  setFamilyEnvironmentID( PidEnvID* penvid );
      void  setFamilyLogin( const char *login );

private:
      enum KILLFAMILY_DIRECTION {
            PATRICIDE,        // parent die first, then kids
            INFANTICIDE       // children die first, then parent
      }; 

      class a_pid;

      void spree(int sig, KILLFAMILY_DIRECTION direction);
      void safe_kill(a_pid *pid, int sig);

      int test_only_flag;
      
      pid_t daddy_pid;

      priv_state mypriv;

      class a_pid {
            public:
                  // Constructor - just zero out everything
                  a_pid() : pid(0),ppid(0),birthday(0L),
                        cpu_user_time(0L),cpu_sys_time(0L) {};
                  
                  // the pid
                  pid_t pid;
                  // the parent's pid
                  pid_t ppid;
                  // the epoch time when process was born
                  birthday_t birthday;
                  // the amount of user cpu time used in seconds
                  long cpu_user_time;
                  // the amount of system cpu time used in seconds
                  long cpu_sys_time;
      };

      ExtArray<a_pid> *old_pids;

      int family_size;

      // total cpu usage for pids which have exited
      long exited_cpu_user_time;
      long exited_cpu_sys_time;

      // total cpu usage for pids which are still alive
      long alive_cpu_user_time;
      long alive_cpu_sys_time;

      unsigned long max_image_size;

      PidEnvID m_penvid;

      char *searchLogin;
};

#endif

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