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.
 */

/* 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:	1.6
Committed:	Fri Jan 16 15:54:52 2004 UTC (20 years, 9 months ago) by tdb
Content type:	text/plain
Branch:	MAIN
Changes since 1.5:	+1 -1 lines
Log Message:	Alter the licensing of libstatgrab. The library part is now under the LGPL, whilst the tools/examples are under the GPL. Both licenses are included in the distribution (and are both now in CVS). Also made a minor alteration to the webpage where it said everything was licensed under the GPL.
#	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			*/
20
21			/* A very basic example of how to get the disk statistics from the system
22			* and diaply them. Also it adds up all the traffic to create and print out
23			* a total
24			* Takes several arguments :
25	tdb	1.4	* -d <number> Takes the number of seconds to wait to get traffic sent since last call
26			* Note, this is not disk traffic per second. Its the traffic since last
27			* call. If you want it traffic per second averaged over time since last call
28	pajs	1.1	* You need to divide against the time since last time this was called. The time
29			* between 2 calls is stored in systime in the disk_stat_t structure.
30			* -b Display in bytes
31			* -k Display in kilobytes
32	tdb	1.4	* -m Display in megabytes
33	pajs	1.1	*/
34
35			#include <stdio.h>
36			#include <statgrab.h>
37			#include <stdlib.h>
38			#include <unistd.h>
39
40			int main(int argc, char **argv){
41
42			extern char *optarg;
43			extern int optind;
44			int c;
45
46			/* We default to 1 second updates and displaying in bytes*/
47			int delay = 1;
48			char units = 'b';
49
50			diskio_stat_t *diskio_stats;
51			int num_diskio_stats;
52
53			/* Parse command line options */
54	ats	1.3	while ((c = getopt(argc, argv, "d:bkm")) != -1){
55	pajs	1.1	switch (c){
56			case 'd':
57			delay = atoi(optarg);
58			break;
59			case 'b':
60			units = 'b';
61			break;
62			case 'k':
63			units = 'k';
64			break;
65			case 'm':
66			units = 'm';
67			break;
68			}
69			}
70
71	tdb	1.4	/* Initialise statgrab */
72			statgrab_init();
73
74	tdb	1.5	/* Drop setuid/setgid privileges. */
75			if (statgrab_drop_privileges() != 0) {
76			perror("Error. Failed to drop privileges");
77			return 1;
78			}
79
80	tdb	1.4	/* We are not interested in the amount of traffic ever transmitted, just differences.
81	pajs	1.1	* Because of this, we do nothing for the very first call.
82			*/
83	tdb	1.4
84	pajs	1.1	diskio_stats = get_diskio_stats_diff(&num_diskio_stats);
85			if (diskio_stats == NULL){
86			perror("Error. Failed to get disk stats");
87			return 1;
88			}
89
90			/* Clear the screen ready for display the disk stats */
91			printf("\033[2J");
92	tdb	1.4
93	pajs	1.1	/* Keep getting the disk stats */
94			while ( (diskio_stats = get_diskio_stats_diff(&num_diskio_stats)) != NULL){
95			int x;
96			int line_number = 2;
97
98			long long total_write=0;
99			long long total_read=0;
100
101			for(x = 0; x < num_diskio_stats; x++){
102			/* Print at location 2, linenumber the interface name */
103			printf("\033[%d;2H%-25s : %-10s", line_number++, "Disk Name", diskio_stats->disk_name);
104			/* Print out at the correct location the traffic in the requsted units passed at command time */
105			switch(units){
106			case 'b':
107			printf("\033[%d;2H%-25s : %8lld b", line_number++, "Disk read", diskio_stats->read_bytes);
108			printf("\033[%d;2H%-25s : %8lld b", line_number++, "Disk write", diskio_stats->write_bytes);
109			break;
110			case 'k':
111			printf("\033[%d;2H%-25s : %5lld k", line_number++, "Disk read", (diskio_stats->read_bytes / 1024));
112	tdb	1.4	printf("\033[%d;2H%-25s : %5lld", line_number++, "Disk write", (diskio_stats->write_bytes / 1024));
113			break;
114	pajs	1.1	case 'm':
115			printf("\033[%d;2H%-25s : %5.2f m", line_number++, "Disk read", diskio_stats->read_bytes / (1024.00*1024.00));
116			printf("\033[%d;2H%-25s : %5.2f m", line_number++, "Disk write", diskio_stats->write_bytes / (1024.00*1024.00));
117			}
118			printf("\033[%d;2H%-25s : %ld ", line_number++, "Disk systime", (long) diskio_stats->systime);
119	tdb	1.4
120	pajs	1.1	/* Add a blank line between interfaces */
121			line_number++;
122
123			/* Add up this interface to the total so we can display a "total" disk io" */
124			total_write+=diskio_stats->write_bytes;
125			total_read+=diskio_stats->read_bytes;
126
127			/* Move the pointer onto the next interface. Since this returns a static buffer, we dont need
128			* to keep track of the orginal pointer to free later */
129			diskio_stats++;
130			}
131	tdb	1.4
132	pajs	1.1	printf("\033[%d;2H%-25s : %-10s", line_number++, "Disk Name", "Total Disk IO");
133			switch(units){
134			case 'b':
135			printf("\033[%d;2H%-25s : %8lld b", line_number++, "Disk Total read", total_read);
136			printf("\033[%d;2H%-25s : %8lld b", line_number++, "Disk Total write", total_write);
137			break;
138			case 'k':
139			printf("\033[%d;2H%-25s : %5lld k", line_number++, "Disk Total read", (total_read / 1024));
140			printf("\033[%d;2H%-25s : %5lld k", line_number++, "Disk Total write", (total_write / 1024));
141			break;
142			case 'm':
143			printf("\033[%d;2H%-25s : %5.2f m", line_number++, "Disk Total read", (total_read / (1024.00*1024.00)));
144			printf("\033[%d;2H%-25s : %5.2f m", line_number++, "Disk Total write", (total_write / (1024.00*1024.00)));
145			break;
146			}
147	tdb	1.4
148	pajs	1.1	fflush(stdout);
149
150			sleep(delay);
151
152			}
153
154			return 0;
155
156			}