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.
 *
 * $Id$
 */

/* 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;
        extern int optind;
        int c;

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

        diskio_stat_t *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 */
        statgrab_init();

        /* Drop setuid/setgid privileges. */
        if (statgrab_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 = get_diskio_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 = get_diskio_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:	1.7
Committed:	Mon Jan 19 16:49:19 2004 UTC (20 years, 9 months ago) by tdb
Content type:	text/plain
Branch:	MAIN
CVS Tags:	LIBSTATGRAB_0_9, LIBSTATGRAB_0_8_2, LIBSTATGRAB_0_8_1
Changes since 1.6:	+2 -0 lines
Log Message:	A whole bunch of minor cosmetic changes.
#	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			* $Id$
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			extern int optind;
46			int c;
47
48			/* We default to 1 second updates and displaying in bytes*/
49			int delay = 1;
50			char units = 'b';
51
52			diskio_stat_t *diskio_stats;
53			int num_diskio_stats;
54
55			/* Parse command line options */
56	ats	1.3	while ((c = getopt(argc, argv, "d:bkm")) != -1){
57	pajs	1.1	switch (c){
58			case 'd':
59			delay = atoi(optarg);
60			break;
61			case 'b':
62			units = 'b';
63			break;
64			case 'k':
65			units = 'k';
66			break;
67			case 'm':
68			units = 'm';
69			break;
70			}
71			}
72
73	tdb	1.4	/* Initialise statgrab */
74			statgrab_init();
75
76	tdb	1.5	/* Drop setuid/setgid privileges. */
77			if (statgrab_drop_privileges() != 0) {
78			perror("Error. Failed to drop privileges");
79			return 1;
80			}
81
82	tdb	1.4	/* We are not interested in the amount of traffic ever transmitted, just differences.
83	pajs	1.1	* Because of this, we do nothing for the very first call.
84			*/
85	tdb	1.4
86	pajs	1.1	diskio_stats = get_diskio_stats_diff(&num_diskio_stats);
87			if (diskio_stats == NULL){
88			perror("Error. Failed to get disk stats");
89			return 1;
90			}
91
92			/* Clear the screen ready for display the disk stats */
93			printf("\033[2J");
94	tdb	1.4
95	pajs	1.1	/* Keep getting the disk stats */
96			while ( (diskio_stats = get_diskio_stats_diff(&num_diskio_stats)) != NULL){
97			int x;
98			int line_number = 2;
99
100			long long total_write=0;
101			long long total_read=0;
102
103			for(x = 0; x < num_diskio_stats; x++){
104			/* Print at location 2, linenumber the interface name */
105			printf("\033[%d;2H%-25s : %-10s", line_number++, "Disk Name", diskio_stats->disk_name);
106			/* Print out at the correct location the traffic in the requsted units passed at command time */
107			switch(units){
108			case 'b':
109			printf("\033[%d;2H%-25s : %8lld b", line_number++, "Disk read", diskio_stats->read_bytes);
110			printf("\033[%d;2H%-25s : %8lld b", line_number++, "Disk write", diskio_stats->write_bytes);
111			break;
112			case 'k':
113			printf("\033[%d;2H%-25s : %5lld k", line_number++, "Disk read", (diskio_stats->read_bytes / 1024));
114	tdb	1.4	printf("\033[%d;2H%-25s : %5lld", line_number++, "Disk write", (diskio_stats->write_bytes / 1024));
115			break;
116	pajs	1.1	case 'm':
117			printf("\033[%d;2H%-25s : %5.2f m", line_number++, "Disk read", diskio_stats->read_bytes / (1024.00*1024.00));
118			printf("\033[%d;2H%-25s : %5.2f m", line_number++, "Disk write", diskio_stats->write_bytes / (1024.00*1024.00));
119			}
120			printf("\033[%d;2H%-25s : %ld ", line_number++, "Disk systime", (long) diskio_stats->systime);
121	tdb	1.4
122	pajs	1.1	/* Add a blank line between interfaces */
123			line_number++;
124
125			/* Add up this interface to the total so we can display a "total" disk io" */
126			total_write+=diskio_stats->write_bytes;
127			total_read+=diskio_stats->read_bytes;
128
129			/* Move the pointer onto the next interface. Since this returns a static buffer, we dont need
130			* to keep track of the orginal pointer to free later */
131			diskio_stats++;
132			}
133	tdb	1.4
134	pajs	1.1	printf("\033[%d;2H%-25s : %-10s", line_number++, "Disk Name", "Total Disk IO");
135			switch(units){
136			case 'b':
137			printf("\033[%d;2H%-25s : %8lld b", line_number++, "Disk Total read", total_read);
138			printf("\033[%d;2H%-25s : %8lld b", line_number++, "Disk Total write", total_write);
139			break;
140			case 'k':
141			printf("\033[%d;2H%-25s : %5lld k", line_number++, "Disk Total read", (total_read / 1024));
142			printf("\033[%d;2H%-25s : %5lld k", line_number++, "Disk Total write", (total_write / 1024));
143			break;
144			case 'm':
145			printf("\033[%d;2H%-25s : %5.2f m", line_number++, "Disk Total read", (total_read / (1024.00*1024.00)));
146			printf("\033[%d;2H%-25s : %5.2f m", line_number++, "Disk Total write", (total_write / (1024.00*1024.00)));
147			break;
148			}
149	tdb	1.4
150	pajs	1.1	fflush(stdout);
151
152			sleep(delay);
153
154			}
155
156			return 0;
157
158			}