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 ALLBSD
#include <sys/types.h>
#endif
#include <utmp.h>

#ifdef SOLARIS
#define MAX_LOGIN_NAME_SIZE 8
#endif
#if defined(LINUX) || defined(FREEBSD)
#define MAX_LOGIN_NAME_SIZE UT_NAMESIZE
#endif
#ifdef NETBSD
#define MAX_LOGIN_NAME_SIZE _POSIX_LOGIN_NAME_MAX
#endif
#if defined(CYGWIN)
#define MAX_LOGIN_NAME_SIZE _SC_LOGIN_NAME_MAX
#endif

#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) || defined(CYGWIN)
        struct utmp *entry;
#endif
#ifdef ALLBSD
        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) || defined(CYGWIN)
        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 ALLBSD
        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:	1.13
Committed:	Tue Jan 6 22:28:41 2004 UTC (20 years, 4 months ago) by pajs
Content type:	text/plain
Branch:	MAIN
Changes since 1.12:	+13 -0 lines
Log Message:	Moving the MAX_LOGIN_NAME_SIZE to where it should be.
#	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	ats	1.10	#ifdef ALLBSD
30	pajs	1.8	#include <sys/types.h>
31			#endif
32	pajs	1.1	#include <utmp.h>
33
34	pajs	1.13	#ifdef SOLARIS
35			#define MAX_LOGIN_NAME_SIZE 8
36			#endif
37			#if defined(LINUX) \|\| defined(FREEBSD)
38			#define MAX_LOGIN_NAME_SIZE UT_NAMESIZE
39			#endif
40			#ifdef NETBSD
41			#define MAX_LOGIN_NAME_SIZE _POSIX_LOGIN_NAME_MAX
42			#endif
43			#if defined(CYGWIN)
44			#define MAX_LOGIN_NAME_SIZE _SC_LOGIN_NAME_MAX
45			#endif
46
47	pajs	1.5	#define START_VAL (5*(1+MAX_LOGIN_NAME_SIZE))
48	pajs	1.1
49			user_stat_t *get_user_stats(){
50			int num_users=0;
51
52	pajs	1.5	static user_stat_t user_stats;
53			static int size_of_namelist=-1;
54			char *tmp;
55	ats	1.12	#if defined(SOLARIS) \|\| defined(LINUX) \|\| defined(CYGWIN)
56	pajs	1.1	struct utmp *entry;
57	pajs	1.8	#endif
58	ats	1.10	#ifdef ALLBSD
59	pajs	1.8	struct utmp entry;
60			FILE *f;
61			#endif
62	pajs	1.1
63			/* First case call */
64	pajs	1.5	if (size_of_namelist==-1){
65			user_stats.name_list=malloc(START_VAL);
66			if(user_stats.name_list==NULL){
67	pajs	1.1	return NULL;
68			}
69	pajs	1.5	size_of_namelist=START_VAL;
70	pajs	1.1	}
71
72	pajs	1.5	/* Essentially blank the list, or give it a inital starting string */
73			strcpy(user_stats.name_list, "");
74	pajs	1.8
75	ats	1.12	#if defined(SOLARIS) \|\| defined(LINUX) \|\| defined(CYGWIN)
76	pajs	1.1	setutent();
77			while((entry=getutent()) != NULL) {
78			if(entry->ut_type==USER_PROCESS) {
79	pajs	1.5	if((strlen(user_stats.name_list)+MAX_LOGIN_NAME_SIZE+2) > size_of_namelist){
80			tmp=user_stats.name_list;
81			user_stats.name_list=realloc(user_stats.name_list, 1+(size_of_namelist*2));
82			if(user_stats.name_list==NULL){
83			user_stats.name_list=tmp;
84	pajs	1.1	return NULL;
85			}
86	pajs	1.5	size_of_namelist=1+(size_of_namelist*2);
87	pajs	1.1	}
88
89	pajs	1.5	strncat(user_stats.name_list, entry->ut_user, MAX_LOGIN_NAME_SIZE);
90			strcat(user_stats.name_list, " ");
91	pajs	1.1	num_users++;
92			}
93			}
94			endutent();
95	pajs	1.8	#endif
96	ats	1.10	#ifdef ALLBSD
97	pajs	1.8	if ((f=fopen(_PATH_UTMP, "r")) == NULL){
98			return NULL;
99			}
100			while((fread(&entry, sizeof(entry),1,f)) != 0){
101			if (entry.ut_name[0] == '\0') continue;
102			if((strlen(user_stats.name_list)+MAX_LOGIN_NAME_SIZE+2) > size_of_namelist){
103			tmp=user_stats.name_list;
104			user_stats.name_list=realloc(user_stats.name_list, 1+(size_of_namelist*2));
105			if(user_stats.name_list==NULL){
106			user_stats.name_list=tmp;
107			return NULL;
108			}
109			size_of_namelist=1+(size_of_namelist*2);
110
111			}
112			strncat(user_stats.name_list, entry.ut_name, MAX_LOGIN_NAME_SIZE);
113			strcat(user_stats.name_list, " ");
114			num_users++;
115			}
116			fclose(f);
117	pajs	1.1
118	pajs	1.8	#endif
119	pajs	1.5	/* We want to remove the last " " */
120	pajs	1.7	if(num_users!=0){
121			tmp=strrchr(user_stats.name_list, ' ');
122			if(tmp!=NULL){
123			*tmp='\0';
124			user_stats.num_entries=num_users;
125			}
126			}
127	pajs	1.5
128			return &user_stats;
129	pajs	1.1
130			}