src/libstatgrab/user_stats.c

/* 
 * i-scream central monitoring system
 * http://www.i-scream.org.uk
 * Copyright (C) 2000-2002 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.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "statgrab.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#ifdef FREEBSD
#include <sys/types.h>
#endif
#include <utmp.h>

#define START_VAL 5

user_stat_t *get_user_stats(){
        int num_users=0;

        static user_stat_t user_stat;
        static int watermark=-1;
        struct utmp *entry;

        name *name_ptr;

        /* First case call */
        if (watermark==-1){
                user_stat.name_list=malloc(START_VAL * sizeof *user_stat.name_list);
                if(user_stat.name_list==NULL){
                        return NULL;
                }
                watermark=START_VAL;
        }       

        setutent();
        while((entry=getutent()) != NULL) {
                if(entry->ut_type==USER_PROCESS) {
                        if(num_users>watermark-1){
                                name_ptr=user_stat.name_list;
                                if((user_stat.name_list=realloc(user_stat.name_list, (watermark*2* sizeof *user_stat.name_list)))==NULL){
                                        user_stat.name_list=name_ptr;
                                        return NULL;
                                }
                                watermark=watermark*2;
                        }

                        strncpy(user_stat.name_list[num_users], entry->ut_user, MAX_LOGIN_NAME_SIZE);
                        /* NULL terminate just in case , the size of user_stat.name_list is MAX_LOGIN_NAME_SIZE+1 */

                        user_stat.name_list[num_users][MAX_LOGIN_NAME_SIZE]='\0';
                                
                        num_users++;
                }
        }
        endutent();
        user_stat.num_entries=num_users;

        return &user_stat;

}
Revision:	1.2
Committed:	Thu Feb 20 13:19:52 2003 UTC (21 years, 2 months ago) by tdb
Content type:	text/plain
Branch:	MAIN
Changes since 1.1:	+0 -1 lines
Log Message:	Removed references to ukcprog.h. Fixed a missing * in the disk stats. And removed a block of linux stuff that shouldn't have been there :-) All with Pete's approval, of course.
#	User	Rev	Content
1	pajs	1.1	/*
2			* i-scream central monitoring system
3			* http://www.i-scream.org.uk
4			* Copyright (C) 2000-2002 i-scream
5			*
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			#ifdef HAVE_CONFIG_H
22			#include "config.h"
23			#endif
24			#include "statgrab.h"
25			#include <stdlib.h>
26			#include <stdio.h>
27			#include <string.h>
28			#ifdef FREEBSD
29			#include <sys/types.h>
30			#endif
31			#include <utmp.h>
32
33			#define START_VAL 5
34
35			user_stat_t *get_user_stats(){
36			int num_users=0;
37
38			static user_stat_t user_stat;
39			static int watermark=-1;
40			struct utmp *entry;
41
42			name *name_ptr;
43
44			/* First case call */
45			if (watermark==-1){
46			user_stat.name_list=malloc(START_VAL * sizeof *user_stat.name_list);
47			if(user_stat.name_list==NULL){
48			return NULL;
49			}
50			watermark=START_VAL;
51			}
52
53			setutent();
54			while((entry=getutent()) != NULL) {
55			if(entry->ut_type==USER_PROCESS) {
56			if(num_users>watermark-1){
57			name_ptr=user_stat.name_list;
58			if((user_stat.name_list=realloc(user_stat.name_list, (watermark2 sizeof *user_stat.name_list)))==NULL){
59			user_stat.name_list=name_ptr;
60			return NULL;
61			}
62			watermark=watermark*2;
63			}
64
65			strncpy(user_stat.name_list[num_users], entry->ut_user, MAX_LOGIN_NAME_SIZE);
66			/* NULL terminate just in case , the size of user_stat.name_list is MAX_LOGIN_NAME_SIZE+1 */
67
68			user_stat.name_list[num_users][MAX_LOGIN_NAME_SIZE]='\0';
69
70			num_users++;
71			}
72			}
73			endutent();
74			user_stat.num_entries=num_users;
75
76			return &user_stat;
77
78			}