src/libstatgrab/user_stats.c

/*
 * i-scream central monitoring system
 * http://www.i-scream.org
 * Copyright (C) 2000-2004 i-scream
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
 * 02111-1307 USA
 *
 * $Id: user_stats.c,v 1.16 2004/01/21 11:32:27 tdb Exp $
 */

#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
#ifdef NETBSD
#include <limits.h>
#endif
#include <utmp.h>
#ifdef CYGWIN
#include <sys/unistd.h>
#endif

#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:	1.17
Committed:	Wed Jan 21 14:44:22 2004 UTC (20 years, 3 months ago) by ats
Content type:	text/plain
Branch:	MAIN
CVS Tags:	LIBSTATGRAB_0_8_2, LIBSTATGRAB_0_8_1
Changes since 1.16:	+4 -1 lines
Log Message:	Fix build on NetBSD.
#	User	Rev	Content
1	tdb	1.14	/*
2	pajs	1.1	* i-scream central monitoring system
3	tdb	1.9	* http://www.i-scream.org
4	tdb	1.14	* Copyright (C) 2000-2004 i-scream
5	pajs	1.1	*
6	tdb	1.14	* This library is free software; you can redistribute it and/or
7			* modify it under the terms of the GNU Lesser General Public
8			* License as published by the Free Software Foundation; either
9			* version 2.1 of the License, or (at your option) any later version.
10	pajs	1.1	*
11	tdb	1.14	* This library is distributed in the hope that it will be useful,
12	pajs	1.1	* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	tdb	1.14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14			* Lesser General Public License for more details.
15	pajs	1.1	*
16	tdb	1.14	* You should have received a copy of the GNU Lesser General Public
17			* License along with this library; if not, write to the Free Software
18			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19			* 02111-1307 USA
20	tdb	1.15	*
21	ats	1.17	* $Id: user_stats.c,v 1.16 2004/01/21 11:32:27 tdb Exp $
22	pajs	1.1	*/
23
24			#ifdef HAVE_CONFIG_H
25			#include "config.h"
26			#endif
27	tdb	1.3
28	pajs	1.1	#include <stdlib.h>
29			#include <stdio.h>
30			#include <string.h>
31	pajs	1.8	#include "statgrab.h"
32	ats	1.10	#ifdef ALLBSD
33	pajs	1.8	#include <sys/types.h>
34	ats	1.17	#endif
35			#ifdef NETBSD
36			#include <limits.h>
37	pajs	1.8	#endif
38	pajs	1.1	#include <utmp.h>
39	tdb	1.16	#ifdef CYGWIN
40			#include <sys/unistd.h>
41			#endif
42	pajs	1.1
43	pajs	1.13	#ifdef SOLARIS
44			#define MAX_LOGIN_NAME_SIZE 8
45			#endif
46			#if defined(LINUX) \|\| defined(FREEBSD)
47			#define MAX_LOGIN_NAME_SIZE UT_NAMESIZE
48			#endif
49			#ifdef NETBSD
50			#define MAX_LOGIN_NAME_SIZE _POSIX_LOGIN_NAME_MAX
51			#endif
52			#if defined(CYGWIN)
53			#define MAX_LOGIN_NAME_SIZE _SC_LOGIN_NAME_MAX
54			#endif
55
56	pajs	1.5	#define START_VAL (5*(1+MAX_LOGIN_NAME_SIZE))
57	pajs	1.1
58			user_stat_t *get_user_stats(){
59			int num_users=0;
60
61	pajs	1.5	static user_stat_t user_stats;
62			static int size_of_namelist=-1;
63			char *tmp;
64	ats	1.12	#if defined(SOLARIS) \|\| defined(LINUX) \|\| defined(CYGWIN)
65	pajs	1.1	struct utmp *entry;
66	pajs	1.8	#endif
67	ats	1.10	#ifdef ALLBSD
68	pajs	1.8	struct utmp entry;
69			FILE *f;
70			#endif
71	pajs	1.1
72			/* First case call */
73	pajs	1.5	if (size_of_namelist==-1){
74			user_stats.name_list=malloc(START_VAL);
75			if(user_stats.name_list==NULL){
76	pajs	1.1	return NULL;
77			}
78	pajs	1.5	size_of_namelist=START_VAL;
79	pajs	1.1	}
80
81	pajs	1.5	/* Essentially blank the list, or give it a inital starting string */
82			strcpy(user_stats.name_list, "");
83	pajs	1.8
84	ats	1.12	#if defined(SOLARIS) \|\| defined(LINUX) \|\| defined(CYGWIN)
85	pajs	1.1	setutent();
86			while((entry=getutent()) != NULL) {
87			if(entry->ut_type==USER_PROCESS) {
88	pajs	1.5	if((strlen(user_stats.name_list)+MAX_LOGIN_NAME_SIZE+2) > size_of_namelist){
89			tmp=user_stats.name_list;
90			user_stats.name_list=realloc(user_stats.name_list, 1+(size_of_namelist*2));
91			if(user_stats.name_list==NULL){
92			user_stats.name_list=tmp;
93	pajs	1.1	return NULL;
94			}
95	pajs	1.5	size_of_namelist=1+(size_of_namelist*2);
96	pajs	1.1	}
97
98	pajs	1.5	strncat(user_stats.name_list, entry->ut_user, MAX_LOGIN_NAME_SIZE);
99			strcat(user_stats.name_list, " ");
100	pajs	1.1	num_users++;
101			}
102			}
103			endutent();
104	pajs	1.8	#endif
105	ats	1.10	#ifdef ALLBSD
106	pajs	1.8	if ((f=fopen(_PATH_UTMP, "r")) == NULL){
107			return NULL;
108			}
109			while((fread(&entry, sizeof(entry),1,f)) != 0){
110			if (entry.ut_name[0] == '\0') continue;
111			if((strlen(user_stats.name_list)+MAX_LOGIN_NAME_SIZE+2) > size_of_namelist){
112			tmp=user_stats.name_list;
113			user_stats.name_list=realloc(user_stats.name_list, 1+(size_of_namelist*2));
114			if(user_stats.name_list==NULL){
115			user_stats.name_list=tmp;
116			return NULL;
117			}
118			size_of_namelist=1+(size_of_namelist*2);
119
120			}
121			strncat(user_stats.name_list, entry.ut_name, MAX_LOGIN_NAME_SIZE);
122			strcat(user_stats.name_list, " ");
123			num_users++;
124			}
125			fclose(f);
126	pajs	1.1
127	pajs	1.8	#endif
128	pajs	1.5	/* We want to remove the last " " */
129	pajs	1.7	if(num_users!=0){
130			tmp=strrchr(user_stats.name_list, ' ');
131			if(tmp!=NULL){
132			*tmp='\0';
133			user_stats.num_entries=num_users;
134			}
135			}
136	pajs	1.5
137			return &user_stats;
138	pajs	1.1
139			}