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/**
*
* cpulimit - a cpu limiter for Linux
*
* Copyright (C) 2005-2008, by: Angelo Marletta <marlonx80@hotmail.com>
*
* 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 2
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef __PROCUTILS_H
#define __PROCUTILS_H
#include <sys/types.h>
#include <dirent.h>
#include "list.h"
#include "process.h"
#define PIDHASH_SZ 1024
#define pid_hashfn(x) ((((x) >> 8) ^ (x)) & (PIDHASH_SZ - 1))
// a hierarchy of processes
struct process_family {
//the (god)father of the process family
pid_t father;
//process list (father process is the first element)
//elements are struct process
struct list members;
//non-members list
//hashtable with all the processes (array of struct list of struct process)
struct list *proctable[PIDHASH_SZ];
//total process count
int count;
};
//TODO: use this object in proctable and delete member in struct process
struct table_item {
struct process *proc;
//1 if the process is a member of the family
int member;
};
// object to enumerate running processes
struct process_iterator {
#ifdef __linux__
DIR *dip;
struct dirent *dit;
#elif defined __APPLE__
struct kinfo_proc *procList;
int count;
int c;
#elif defined __FreeBSD__
int count;
#endif
struct process *current;
};
// searches for all the processes derived from father and stores them
// in the process family struct
int create_process_family(struct process_family *f, pid_t father);
// checks if there are new processes born in the specified family
// if any they are added to the members list
// the number of new born processes is returned
int update_process_family(struct process_family *f);
// removes a process from the family by its pid
void remove_process_from_family(struct process_family *f, pid_t pid);
// free the heap memory used by a process family
void cleanup_process_family(struct process_family *f);
// searches a process given the name of the executable file, or its absolute path
// returns the pid, or 0 if it's not found
int look_for_process_by_name(const char *process_name);
// searches a process given its pid
// returns the pid, or 0 if it's not found
int look_for_process_by_pid(pid_t pid);
#endif
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