/*
 * Copyright (C), 2000-2007 by the monit project group.
 * All Rights Reserved.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */


#include <config.h>

#ifdef HAVE_STDIO_H
#include <stdio.h>
#endif

#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif

#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif

#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif

#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif

#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif

#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif

#ifdef TIME_WITH_SYS_TIME
#include <time.h>

#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#else
#include <time.h>
#endif

#ifdef HAVE_STRING_H
#include <string.h>
#endif

#ifdef HAVE_PROCINFO_H
#include <procinfo.h>
#endif

#ifdef HAVE_SYS_PROC_H
#include <sys/proc.h>
#endif

#ifdef HAVE_PROCFS_H
#include <procfs.h>
#endif

#ifdef HAVE_CF_H
#include <cf.h>
#endif

#ifdef HAVE_SYS_CFGODM_H
#include <sys/cfgodm.h>
#endif

#ifdef HAVE_SYS_CFGDB_H
#include <sys/cfgdb.h>
#endif


#include "monitor.h"
#include "process.h"
#include "process_sysdep.h"

/**
 *  System dependent resource gathering code for AIX
 *
 *  @author Richard Schwaninger <risc@vmilch.at>
 *  @author Jan-Henrik Haukeland, <hauk@tildeslash.com>
 *  @author Christian Hopp <chopp@iei.tu-clausthal.de>
 *
 *  @version \$Id: sysdep_AIX.c,v 1.17 2007/07/25 12:54:32 hauk Exp $
 *
 *  @file
 * most of the code is based on monitor-2.1.5 available on various sources
 * (see below).
 * The source code version of monitor program can be get from ftp-server
 *    ftp://ftp.mesa.nl/pub/monitor/monitor-2.1.5.tar.gz
 * or via the web from
 *    http://www.mesa.nl/pub/monitor/monitor-2.1.5.tar.gz.
 */

#define NPROCS 10000
struct procinfo procs[NPROCS];
int kmemfd = -1;
int nlistdone = 0;

int init_process_info_sysdep(void) {

  struct CuAt*      odmobj;
  int               results;
  
  if (odm_initialize() == 0) {
    odmobj = (struct CuAt*)getattr ("sys0", "realmem", 0, &results);
    systeminfo.mem_kbyte_max = strtoull(odmobj->value, 0, 10);
    odm_terminate();
  } else {
    mem_kbyte_max = 0;
  }

  num_cpus= sysconf( _SC_NPROCESSORS_ONLN);
  return (getuid()==0);

}

double timestruc_to_tseconds(struct timeval t) {

  return  t.tv_sec * 10 + t.tv_usec * 1.0e-7;

}

/***************************************************************************
 *                      DATA CAPTURE FUNCTIONS                             *
 ***************************************************************************/

int getkmemdata(void *buf, int bufsize, caddr_t address) {

  int n;
  
  /*
   * Do stuff we only need to do once per invocation, like opening
   * the kmem file and fetching the parts of the symbol table.
   */
  
  if (kmemfd < 0) {
    if ((kmemfd = open("/dev/kmem", O_RDONLY)) < 0) {
      perror("kmem");
      exit(1);
    }
  }

  /*
   * Get the structure from the running kernel.
   */

  lseek(kmemfd, (off_t) address, SEEK_SET);
  n = read(kmemfd, buf, bufsize);
  
  return(n);

} /* getkmemdata */


/**
 * This routine returns 'nelem' double precision floats containing
 * the load averages in 'loadv'; at most 3 values will be returned.
 * @param loadv destination of the load averages
 * @param nelem number of averages
 * @return: 0 if successful, -1 if failed (and all load averages are 0).
 */
int getloadavg_sysdep (double *loadv, int nelem) {

  return getloadavg(loadv, nelem);

}


/**
 * Read all processes of the proc files system to initialize
 * the process tree (sysdep version... but should work for
 * all procfs based unices) 
 * @param reference  reference of ProcessTree
 * @return treesize>0 if succeeded otherwise =0.
 */
int initprocesstree_sysdep(ProcessTree_T ** reference) {

  int treesize;
  int i,rv;
  struct userinfo user;
  ProcessTree_T *  pt;
  
  memset(&user,0,sizeof(struct userinfo));

  /* Find all processes in the system */

  treesize=getproc(procs,NPROCS,sizeof(struct procinfo));
  
  /* Allocate the tree */
  
  pt = xcalloc(sizeof(ProcessTree_T), treesize);

  /* Insert data from /proc directory */

  for(i=0;i<treesize;i++) {

    pt[i].pid=procs[i].pi_pid;
    pt[i].ppid=procs[i].pi_ppid;

    if(procs[i].pi_stat==SZOMB) {

      pt[i].cputime = 0;
      pt[i].mem_kbyte= 0;
      pt[i].status_flag |= PROCESS_ZOMBIE;
 
     } else {

      rv=getuser(&(procs[i]),sizeof(struct procinfo),
                 &user,sizeof(struct userinfo));
      
      if(rv== -1) {
        
        pt[i].cputime = 0;
        pt[i].mem_kbyte= 0;
        
      } else {

        pt[i].mem_kbyte = (user.ui_drss+user.ui_trss)*4;
        pt[i].cputime= ( timestruc_to_tseconds(user.ui_ru.ru_utime) +
                         timestruc_to_tseconds(user.ui_ru.ru_stime));
        
      }
      
    }    
    
  }

  * reference = pt;

  return treesize;

}


/**
 * This routine returns kbyte of real memory in use.
 * @return: TRUE if successful, FALSE if failed (or not available)
 */
int used_system_memory_sysdep(SystemInfo_T *si) {

  return FALSE;
  
}


/**
 * This routine returns system/user CPU time in use.
 * @return: TRUE if successful, FALSE if failed (or not available)
 */
int used_system_cpu_sysdep(SystemInfo_T *si) {

  return FALSE;
  
}