libstatgrab/examples/disk_traffic.c

/*
 * i-scream central monitoring system
 * http://www.i-scream.org
 * Copyright (C) 2000-2004 i-scream
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * $Id: disk_traffic.c,v 1.8 2004/04/04 22:48:49 tdb Exp $
 */

/* A very basic example of how to get the disk statistics from the system 
 * and diaply them. Also it adds up all the traffic to create and print out
 * a total 
 * Takes several arguments :
 * -d <number>  Takes the number of seconds to wait to get traffic sent since last call
 *              Note, this is not disk traffic per second. Its the traffic since last
 *              call. If you want it traffic per second averaged over time since last call
 *              You need to divide against the time since last time this was called. The time
 *              between 2 calls is stored in systime in the disk_stat_t structure.
 * -b           Display in bytes
 * -k           Display in kilobytes
 * -m           Display in megabytes
 */

#include <stdio.h>
#include <statgrab.h>
#include <stdlib.h>
#include <unistd.h>

int main(int argc, char **argv){

        extern char *optarg;
        int c;

        /* We default to 1 second updates and displaying in bytes*/
        int delay = 1;
        char units = 'b';

        sg_disk_io_stats *diskio_stats;
        int num_diskio_stats;

        /* Parse command line options */
        while ((c = getopt(argc, argv, "d:bkm")) != -1){
                switch (c){
                        case 'd':
                                delay = atoi(optarg);
                                break;
                        case 'b':
                                units = 'b';
                                break;
                        case 'k':
                                units = 'k';    
                                break;
                        case 'm':
                                units = 'm';
                                break;
                }
        }

        /* Initialise statgrab */
        sg_init();

        /* Drop setuid/setgid privileges. */
        if (sg_drop_privileges() != 0) {
                perror("Error. Failed to drop privileges");
                return 1;
        }

        /* We are not interested in the amount of traffic ever transmitted, just differences. 
         * Because of this, we do nothing for the very first call.
         */

        diskio_stats = sg_get_disk_io_stats_diff(&num_diskio_stats);
        if (diskio_stats == NULL){
                perror("Error. Failed to get disk stats");
                return 1;
        }

        /* Clear the screen ready for display the disk stats */
        printf("\033[2J");

        /* Keep getting the disk stats */
        while ( (diskio_stats = sg_get_disk_io_stats_diff(&num_diskio_stats)) != NULL){
                int x;
                int line_number = 2;

                long long total_write=0;
                long long total_read=0;

                for(x = 0; x < num_diskio_stats; x++){  
                        /* Print at location 2, linenumber the interface name */
                        printf("\033[%d;2H%-25s : %-10s", line_number++, "Disk Name", diskio_stats->disk_name);
                        /* Print out at the correct location the traffic in the requsted units passed at command time */
                        switch(units){
                                case 'b':
                                        printf("\033[%d;2H%-25s : %8lld b", line_number++, "Disk read", diskio_stats->read_bytes);
                                        printf("\033[%d;2H%-25s : %8lld b", line_number++, "Disk write", diskio_stats->write_bytes);
                                        break;
                                case 'k':
                                        printf("\033[%d;2H%-25s : %5lld k", line_number++, "Disk read", (diskio_stats->read_bytes / 1024));
                                        printf("\033[%d;2H%-25s : %5lld", line_number++, "Disk write", (diskio_stats->write_bytes / 1024));
                                        break;
                                case 'm':
                                        printf("\033[%d;2H%-25s : %5.2f m", line_number++, "Disk read", diskio_stats->read_bytes / (1024.00*1024.00));
                                        printf("\033[%d;2H%-25s : %5.2f m", line_number++, "Disk write", diskio_stats->write_bytes / (1024.00*1024.00));
                        }
                        printf("\033[%d;2H%-25s : %ld ", line_number++, "Disk systime", (long) diskio_stats->systime);

                        /* Add a blank line between interfaces */       
                        line_number++;

                        /* Add up this interface to the total so we can display a "total" disk io" */
                        total_write+=diskio_stats->write_bytes;
                        total_read+=diskio_stats->read_bytes;

                        /* Move the pointer onto the next interface. Since this returns a static buffer, we dont need
                         * to keep track of the orginal pointer to free later */
                        diskio_stats++;
                }

                printf("\033[%d;2H%-25s : %-10s", line_number++, "Disk Name", "Total Disk IO");
                switch(units){
                        case 'b':
                                printf("\033[%d;2H%-25s : %8lld b", line_number++, "Disk Total read", total_read);
                                printf("\033[%d;2H%-25s : %8lld b", line_number++, "Disk Total write", total_write);
                                break;
                        case 'k':
                                printf("\033[%d;2H%-25s : %5lld k", line_number++, "Disk Total read", (total_read / 1024));
                                printf("\033[%d;2H%-25s : %5lld k", line_number++, "Disk Total write", (total_write / 1024));
                                break;
                        case 'm':
                                printf("\033[%d;2H%-25s : %5.2f m", line_number++, "Disk Total read", (total_read  / (1024.00*1024.00)));
                                printf("\033[%d;2H%-25s : %5.2f m", line_number++, "Disk Total write", (total_write  / (1024.00*1024.00)));
                                break;
                }

                fflush(stdout);

                sleep(delay);

        }

        return 0;

}
Revision:	1.9
Committed:	Mon Apr 5 16:23:08 2004 UTC (20 years, 7 months ago) by tdb
Content type:	text/plain
Branch:	MAIN
Changes since 1.8:	+6 -6 lines
Log Message:	Update examples to use new names. I guess some renaming could probably be done here, but at least they all compile again now.
#	User	Rev	Content
1	pajs	1.1	/*
2			* i-scream central monitoring system
3	tdb	1.2	* http://www.i-scream.org
4	tdb	1.6	* Copyright (C) 2000-2004 i-scream
5	pajs	1.1	*
6			* This program is free software; you can redistribute it and/or
7			* modify it under the terms of the GNU General Public License
8			* as published by the Free Software Foundation; either version 2
9			* of the License, or (at your option) any later version.
10			*
11			* This program is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14			* GNU General Public License for more details.
15			*
16			* You should have received a copy of the GNU General Public License
17			* along with this program; if not, write to the Free Software
18			* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19	tdb	1.7	*
20	tdb	1.9	* $Id: disk_traffic.c,v 1.8 2004/04/04 22:48:49 tdb Exp $
21	pajs	1.1	*/
22
23			/* A very basic example of how to get the disk statistics from the system
24			* and diaply them. Also it adds up all the traffic to create and print out
25			* a total
26			* Takes several arguments :
27	tdb	1.4	* -d <number> Takes the number of seconds to wait to get traffic sent since last call
28			* Note, this is not disk traffic per second. Its the traffic since last
29			* call. If you want it traffic per second averaged over time since last call
30	pajs	1.1	* You need to divide against the time since last time this was called. The time
31			* between 2 calls is stored in systime in the disk_stat_t structure.
32			* -b Display in bytes
33			* -k Display in kilobytes
34	tdb	1.4	* -m Display in megabytes
35	pajs	1.1	*/
36
37			#include <stdio.h>
38			#include <statgrab.h>
39			#include <stdlib.h>
40			#include <unistd.h>
41
42			int main(int argc, char **argv){
43
44			extern char *optarg;
45			int c;
46
47			/* We default to 1 second updates and displaying in bytes*/
48			int delay = 1;
49			char units = 'b';
50
51	tdb	1.9	sg_disk_io_stats *diskio_stats;
52	pajs	1.1	int num_diskio_stats;
53
54			/* Parse command line options */
55	ats	1.3	while ((c = getopt(argc, argv, "d:bkm")) != -1){
56	pajs	1.1	switch (c){
57			case 'd':
58			delay = atoi(optarg);
59			break;
60			case 'b':
61			units = 'b';
62			break;
63			case 'k':
64			units = 'k';
65			break;
66			case 'm':
67			units = 'm';
68			break;
69			}
70			}
71
72	tdb	1.4	/* Initialise statgrab */
73	tdb	1.9	sg_init();
74	tdb	1.4
75	tdb	1.5	/* Drop setuid/setgid privileges. */
76	tdb	1.9	if (sg_drop_privileges() != 0) {
77	tdb	1.5	perror("Error. Failed to drop privileges");
78			return 1;
79			}
80
81	tdb	1.4	/* We are not interested in the amount of traffic ever transmitted, just differences.
82	pajs	1.1	* Because of this, we do nothing for the very first call.
83			*/
84	tdb	1.4
85	tdb	1.9	diskio_stats = sg_get_disk_io_stats_diff(&num_diskio_stats);
86	pajs	1.1	if (diskio_stats == NULL){
87			perror("Error. Failed to get disk stats");
88			return 1;
89			}
90
91			/* Clear the screen ready for display the disk stats */
92			printf("\033[2J");
93	tdb	1.4
94	pajs	1.1	/* Keep getting the disk stats */
95	tdb	1.9	while ( (diskio_stats = sg_get_disk_io_stats_diff(&num_diskio_stats)) != NULL){
96	pajs	1.1	int x;
97			int line_number = 2;
98
99			long long total_write=0;
100			long long total_read=0;
101
102			for(x = 0; x < num_diskio_stats; x++){
103			/* Print at location 2, linenumber the interface name */
104			printf("\033[%d;2H%-25s : %-10s", line_number++, "Disk Name", diskio_stats->disk_name);
105			/* Print out at the correct location the traffic in the requsted units passed at command time */
106			switch(units){
107			case 'b':
108			printf("\033[%d;2H%-25s : %8lld b", line_number++, "Disk read", diskio_stats->read_bytes);
109			printf("\033[%d;2H%-25s : %8lld b", line_number++, "Disk write", diskio_stats->write_bytes);
110			break;
111			case 'k':
112			printf("\033[%d;2H%-25s : %5lld k", line_number++, "Disk read", (diskio_stats->read_bytes / 1024));
113	tdb	1.4	printf("\033[%d;2H%-25s : %5lld", line_number++, "Disk write", (diskio_stats->write_bytes / 1024));
114			break;
115	pajs	1.1	case 'm':
116			printf("\033[%d;2H%-25s : %5.2f m", line_number++, "Disk read", diskio_stats->read_bytes / (1024.00*1024.00));
117			printf("\033[%d;2H%-25s : %5.2f m", line_number++, "Disk write", diskio_stats->write_bytes / (1024.00*1024.00));
118			}
119			printf("\033[%d;2H%-25s : %ld ", line_number++, "Disk systime", (long) diskio_stats->systime);
120	tdb	1.4
121	pajs	1.1	/* Add a blank line between interfaces */
122			line_number++;
123
124			/* Add up this interface to the total so we can display a "total" disk io" */
125			total_write+=diskio_stats->write_bytes;
126			total_read+=diskio_stats->read_bytes;
127
128			/* Move the pointer onto the next interface. Since this returns a static buffer, we dont need
129			* to keep track of the orginal pointer to free later */
130			diskio_stats++;
131			}
132	tdb	1.4
133	pajs	1.1	printf("\033[%d;2H%-25s : %-10s", line_number++, "Disk Name", "Total Disk IO");
134			switch(units){
135			case 'b':
136			printf("\033[%d;2H%-25s : %8lld b", line_number++, "Disk Total read", total_read);
137			printf("\033[%d;2H%-25s : %8lld b", line_number++, "Disk Total write", total_write);
138			break;
139			case 'k':
140			printf("\033[%d;2H%-25s : %5lld k", line_number++, "Disk Total read", (total_read / 1024));
141			printf("\033[%d;2H%-25s : %5lld k", line_number++, "Disk Total write", (total_write / 1024));
142			break;
143			case 'm':
144			printf("\033[%d;2H%-25s : %5.2f m", line_number++, "Disk Total read", (total_read / (1024.00*1024.00)));
145			printf("\033[%d;2H%-25s : %5.2f m", line_number++, "Disk Total write", (total_write / (1024.00*1024.00)));
146			break;
147			}
148	tdb	1.4
149	pajs	1.1	fflush(stdout);
150
151			sleep(delay);
152
153			}
154
155			return 0;
156
157			}