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95 lines
2.7 KiB
C
95 lines
2.7 KiB
C
/**
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*
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* cpulimit - a cpu limiter for Linux
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*
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* Copyright (C) 2005-2008, by: Angelo Marletta <marlonx80@hotmail.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef __PROCUTILS_H
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#define __PROCUTILS_H
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#include <sys/types.h>
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#include <dirent.h>
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#include "list.h"
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#include "process.h"
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#define PIDHASH_SZ 1024
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#define pid_hashfn(x) ((((x) >> 8) ^ (x)) & (PIDHASH_SZ - 1))
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// a hierarchy of processes
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struct process_family {
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//the (god)father of the process family
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pid_t father;
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//process list (father process is the first element)
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//elements are struct process
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struct list members;
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//non-members list
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//hashtable with all the processes (array of struct list of struct process)
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struct list *proctable[PIDHASH_SZ];
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//total process count
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int count;
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};
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//TODO: use this object in proctable and delete member in struct process
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struct table_item {
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struct process *proc;
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//1 if the process is a member of the family
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int member;
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};
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// object to enumerate running processes
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struct process_iterator {
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#ifdef __linux__
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DIR *dip;
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struct dirent *dit;
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#elif defined __APPLE__
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struct kinfo_proc *procList;
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int count;
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int c;
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#elif defined __hpux
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int count;
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#endif
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struct process *current;
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};
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// searches for all the processes derived from father and stores them
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// in the process family struct
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int create_process_family(struct process_family *f, pid_t father);
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// checks if there are new processes born in the specified family
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// if any they are added to the members list
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// the number of new born processes is returned
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int update_process_family(struct process_family *f);
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// removes a process from the family by its pid
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void remove_process_from_family(struct process_family *f, pid_t pid);
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// free the heap memory used by a process family
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void cleanup_process_family(struct process_family *f);
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// searches a process given the name of the executable file, or its absolute path
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// returns the pid, or 0 if it's not found
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int look_for_process_by_name(const char *process_name);
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// searches a process given its pid
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// returns the pid, or 0 if it's not found
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int look_for_process_by_pid(pid_t pid);
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#endif
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