1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
|
/**
*
* cpulimit - a CPU limiter for Linux
*
* Copyright (C) 2005-2012, by: Angelo Marletta <angelo dot marletta at gmail dot 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 __PROCESS_ITERATOR_H
#define __PROCESS_ITERATOR_H
#include <unistd.h>
#include <limits.h>
#include <dirent.h>
//USER_HZ detection, from openssl code
#ifndef HZ
# if defined(_SC_CLK_TCK) \
&& (!defined(OPENSSL_SYS_VMS) || __CTRL_VER >= 70000000)
# define HZ ((double)sysconf(_SC_CLK_TCK))
# else
# ifndef CLK_TCK
# ifndef _BSD_CLK_TCK_ /* FreeBSD hack */
# define HZ 100.0
# else /* _BSD_CLK_TCK_ */
# define HZ ((double)_BSD_CLK_TCK_)
# endif
# else /* CLK_TCK */
# define HZ ((double)CLK_TCK)
# endif
# endif
#endif
#ifdef __FreeBSD__
#include <kvm.h>
#endif
#ifdef __OpenBSD__
#include <fcntl.h>
#include <kvm.h>
#endif
// process descriptor
struct process {
//pid of the process
pid_t pid;
//ppid of the process
pid_t ppid;
//start time (unix timestamp)
int starttime;
//cputime used by the process (in milliseconds)
int cputime;
//actual cpu usage estimation (value in range 0-1)
double cpu_usage;
//absolute path of the executable file
char command[PATH_MAX+1];
};
struct process_filter {
int pid;
int include_children;
char program_name[PATH_MAX+1];
};
struct process_iterator {
#ifdef __linux__
DIR *dip;
int boot_time;
#elif ( defined __FreeBSD__) || (defined __OpenBSD__ )
kvm_t *kd;
struct kinfo_proc *procs;
int count;
int i;
#elif defined __APPLE__
int i;
int count;
int *pidlist;
#endif
struct process_filter *filter;
};
int init_process_iterator(struct process_iterator *i, struct process_filter *filter);
int get_next_process(struct process_iterator *i, struct process *p);
int close_process_iterator(struct process_iterator *i);
#endif
|