src/libstatgrab/user_stats.c

/* 
 * i-scream central monitoring system
 * http://www.i-scream.org
 * Copyright (C) 2000-2003 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 <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "statgrab.h"
#ifdef FREEBSD
#include <sys/types.h>
#endif
#include <utmp.h>

#define START_VAL (5*(1+MAX_LOGIN_NAME_SIZE))

user_stat_t *get_user_stats(){
        int num_users=0;

        static user_stat_t user_stats;
        static int size_of_namelist=-1;
        char *tmp;
#if defined(SOLARIS) || defined(LINUX)  
        struct utmp *entry;
#endif
#ifdef FREEBSD
        struct utmp entry;
        FILE *f;
#endif

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

        /* Essentially blank the list, or give it a inital starting string */
        strcpy(user_stats.name_list, "");

#if defined(SOLARIS) || defined(LINUX)  
        setutent();
        while((entry=getutent()) != NULL) {
                if(entry->ut_type==USER_PROCESS) {
                        if((strlen(user_stats.name_list)+MAX_LOGIN_NAME_SIZE+2) > size_of_namelist){
                                tmp=user_stats.name_list;
                                user_stats.name_list=realloc(user_stats.name_list, 1+(size_of_namelist*2));
                                if(user_stats.name_list==NULL){
                                        user_stats.name_list=tmp;
                                        return NULL;
                                }
                                size_of_namelist=1+(size_of_namelist*2);
                        }

                        strncat(user_stats.name_list, entry->ut_user, MAX_LOGIN_NAME_SIZE);
                        strcat(user_stats.name_list, " ");
                        num_users++;
                }
        }
        endutent();
#endif
#ifdef FREEBSD
        if ((f=fopen(_PATH_UTMP, "r")) == NULL){
                return NULL;
        }
        while((fread(&entry, sizeof(entry),1,f)) != 0){
                if (entry.ut_name[0] == '\0') continue;
                if((strlen(user_stats.name_list)+MAX_LOGIN_NAME_SIZE+2) > size_of_namelist){
                        tmp=user_stats.name_list;
                        user_stats.name_list=realloc(user_stats.name_list, 1+(size_of_namelist*2));
                        if(user_stats.name_list==NULL){
                                user_stats.name_list=tmp;
                                return NULL;
                        }
                        size_of_namelist=1+(size_of_namelist*2);
                        
                }
                strncat(user_stats.name_list, entry.ut_name, MAX_LOGIN_NAME_SIZE);
                strcat(user_stats.name_list, " ");
                num_users++;
        }
        fclose(f);

#endif  
        /* We want to remove the last " " */
        if(num_users!=0){
                tmp=strrchr(user_stats.name_list, ' ');
                if(tmp!=NULL){
                        *tmp='\0';
                        user_stats.num_entries=num_users;
                }
        }

        return &user_stats;

}
Revision:	1.9
Committed:	Sun Aug 24 20:24:09 2003 UTC (20 years, 8 months ago) by tdb
Content type:	text/plain
Branch:	MAIN
CVS Tags:	LIBSTATGRAB_0_6_1, LIBSTATGRAB_0_6, LIBSTATGRAB_0_5_1, LIBSTATGRAB_0_5
Changes since 1.8:	+2 -2 lines
Log Message:	Tidy up of lots of little things. :)
#	User	Rev	Content
1	pajs	1.1	/*
2			* i-scream central monitoring system
3	tdb	1.9	* http://www.i-scream.org
4			* Copyright (C) 2000-2003 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			#ifdef HAVE_CONFIG_H
22			#include "config.h"
23			#endif
24	tdb	1.3
25	pajs	1.1	#include <stdlib.h>
26			#include <stdio.h>
27			#include <string.h>
28	pajs	1.8	#include "statgrab.h"
29			#ifdef FREEBSD
30			#include <sys/types.h>
31			#endif
32	pajs	1.1	#include <utmp.h>
33
34	pajs	1.5	#define START_VAL (5*(1+MAX_LOGIN_NAME_SIZE))
35	pajs	1.1
36			user_stat_t *get_user_stats(){
37			int num_users=0;
38
39	pajs	1.5	static user_stat_t user_stats;
40			static int size_of_namelist=-1;
41			char *tmp;
42	pajs	1.8	#if defined(SOLARIS) \|\| defined(LINUX)
43	pajs	1.1	struct utmp *entry;
44	pajs	1.8	#endif
45			#ifdef FREEBSD
46			struct utmp entry;
47			FILE *f;
48			#endif
49	pajs	1.1
50			/* First case call */
51	pajs	1.5	if (size_of_namelist==-1){
52			user_stats.name_list=malloc(START_VAL);
53			if(user_stats.name_list==NULL){
54	pajs	1.1	return NULL;
55			}
56	pajs	1.5	size_of_namelist=START_VAL;
57	pajs	1.1	}
58
59	pajs	1.5	/* Essentially blank the list, or give it a inital starting string */
60			strcpy(user_stats.name_list, "");
61	pajs	1.8
62			#if defined(SOLARIS) \|\| defined(LINUX)
63	pajs	1.1	setutent();
64			while((entry=getutent()) != NULL) {
65			if(entry->ut_type==USER_PROCESS) {
66	pajs	1.5	if((strlen(user_stats.name_list)+MAX_LOGIN_NAME_SIZE+2) > size_of_namelist){
67			tmp=user_stats.name_list;
68			user_stats.name_list=realloc(user_stats.name_list, 1+(size_of_namelist*2));
69			if(user_stats.name_list==NULL){
70			user_stats.name_list=tmp;
71	pajs	1.1	return NULL;
72			}
73	pajs	1.5	size_of_namelist=1+(size_of_namelist*2);
74	pajs	1.1	}
75
76	pajs	1.5	strncat(user_stats.name_list, entry->ut_user, MAX_LOGIN_NAME_SIZE);
77			strcat(user_stats.name_list, " ");
78	pajs	1.1	num_users++;
79			}
80			}
81			endutent();
82	pajs	1.8	#endif
83			#ifdef FREEBSD
84			if ((f=fopen(_PATH_UTMP, "r")) == NULL){
85			return NULL;
86			}
87			while((fread(&entry, sizeof(entry),1,f)) != 0){
88			if (entry.ut_name[0] == '\0') continue;
89			if((strlen(user_stats.name_list)+MAX_LOGIN_NAME_SIZE+2) > size_of_namelist){
90			tmp=user_stats.name_list;
91			user_stats.name_list=realloc(user_stats.name_list, 1+(size_of_namelist*2));
92			if(user_stats.name_list==NULL){
93			user_stats.name_list=tmp;
94			return NULL;
95			}
96			size_of_namelist=1+(size_of_namelist*2);
97
98			}
99			strncat(user_stats.name_list, entry.ut_name, MAX_LOGIN_NAME_SIZE);
100			strcat(user_stats.name_list, " ");
101			num_users++;
102			}
103			fclose(f);
104	pajs	1.1
105	pajs	1.8	#endif
106	pajs	1.5	/* We want to remove the last " " */
107	pajs	1.7	if(num_users!=0){
108			tmp=strrchr(user_stats.name_list, ' ');
109			if(tmp!=NULL){
110			*tmp='\0';
111			user_stats.num_entries=num_users;
112			}
113			}
114	pajs	1.5
115			return &user_stats;
116	pajs	1.1
117			}