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 1.19 2004/02/16 14:55:32 tdb Exp $
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "statgrab.h"
#include "vector.h"
#ifdef ALLBSD
#include <sys/types.h>
#endif
#if defined(NETBSD) || defined(OPENBSD)
#include <limits.h>
#endif
#ifdef OPENBSD
#include <sys/param.h>
#endif
#include <utmp.h>
#ifdef CYGWIN
#include <sys/unistd.h>
#endif

user_stat_t *get_user_stats(){
        int num_users = 0, pos = 0, new_pos;
        VECTOR_DECLARE_STATIC(name_list, char, 128, NULL, NULL);
        static user_stat_t user_stats;
#if defined(SOLARIS) || defined(LINUX) || defined(CYGWIN)
        struct utmp *entry;
#endif
#ifdef ALLBSD
        struct utmp entry;
        FILE *f;
#endif

#if defined(SOLARIS) || defined(LINUX) || defined(CYGWIN)
        setutent();
        while((entry=getutent()) != NULL) {
                if (entry->ut_type != USER_PROCESS) continue;

                new_pos = pos + strlen(entry->ut_user) + 1;
                if (VECTOR_RESIZE(name_list, new_pos) < 0) {
                        return NULL;
                }

                strcpy(name_list + pos, entry->ut_user);
                name_list[new_pos - 1] = ' ';
                pos = new_pos;
                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;

                new_pos = pos + strlen(entry.ut_name) + 1;
                if (VECTOR_RESIZE(name_list, new_pos) < 0) {
                        return NULL;
                }

                strcpy(name_list + pos, entry.ut_name);
                name_list[new_pos - 1] = ' ';
                pos = new_pos;
                num_users++;
        }
        fclose(f);
#endif

        /* Remove the extra space at the end, and append a \0. */
        if (num_users != 0) {
                pos--;
        }
        VECTOR_RESIZE(name_list, pos + 1);
        name_list[pos] = '\0';

        user_stats.num_entries = num_users;
        user_stats.name_list = name_list;
        return &user_stats;
}
Revision:	1.20
Committed:	Sun Apr 4 23:45:03 2004 UTC (20 years, 1 month ago) by ats
Content type:	text/plain
Branch:	MAIN
Changes since 1.19:	+30 -66 lines
Log Message:	Rework user_stats to use vectors, which gets rid of all the MAX_LOGIN_NAME_SIZE stuff too.
#	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	1.20	* $Id: user_stats.c,v 1.19 2004/02/16 14:55:32 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	1.20	#include "vector.h"
33	ats	1.10	#ifdef ALLBSD
34	pajs	1.8	#include <sys/types.h>
35	ats	1.17	#endif
36	tdb	1.18	#if defined(NETBSD) \|\| defined(OPENBSD)
37	ats	1.17	#include <limits.h>
38	pajs	1.8	#endif
39	tdb	1.18	#ifdef OPENBSD
40			#include <sys/param.h>
41			#endif
42	pajs	1.1	#include <utmp.h>
43	tdb	1.16	#ifdef CYGWIN
44			#include <sys/unistd.h>
45			#endif
46	pajs	1.1
47			user_stat_t *get_user_stats(){
48	ats	1.20	int num_users = 0, pos = 0, new_pos;
49			VECTOR_DECLARE_STATIC(name_list, char, 128, NULL, NULL);
50	pajs	1.5	static user_stat_t user_stats;
51	ats	1.12	#if defined(SOLARIS) \|\| defined(LINUX) \|\| defined(CYGWIN)
52	pajs	1.1	struct utmp *entry;
53	pajs	1.8	#endif
54	ats	1.10	#ifdef ALLBSD
55	pajs	1.8	struct utmp entry;
56			FILE *f;
57			#endif
58	pajs	1.1
59	ats	1.12	#if defined(SOLARIS) \|\| defined(LINUX) \|\| defined(CYGWIN)
60	pajs	1.1	setutent();
61			while((entry=getutent()) != NULL) {
62	ats	1.20	if (entry->ut_type != USER_PROCESS) continue;
63
64			new_pos = pos + strlen(entry->ut_user) + 1;
65			if (VECTOR_RESIZE(name_list, new_pos) < 0) {
66			return NULL;
67	pajs	1.1	}
68	ats	1.20
69			strcpy(name_list + pos, entry->ut_user);
70			name_list[new_pos - 1] = ' ';
71			pos = new_pos;
72			num_users++;
73	pajs	1.1	}
74			endutent();
75	pajs	1.8	#endif
76	ats	1.10	#ifdef ALLBSD
77	pajs	1.8	if ((f=fopen(_PATH_UTMP, "r")) == NULL){
78			return NULL;
79			}
80			while((fread(&entry, sizeof(entry),1,f)) != 0){
81			if (entry.ut_name[0] == '\0') continue;
82	ats	1.20
83			new_pos = pos + strlen(entry.ut_name) + 1;
84			if (VECTOR_RESIZE(name_list, new_pos) < 0) {
85			return NULL;
86	pajs	1.8	}
87	ats	1.20
88			strcpy(name_list + pos, entry.ut_name);
89			name_list[new_pos - 1] = ' ';
90			pos = new_pos;
91	pajs	1.8	num_users++;
92			}
93			fclose(f);
94	ats	1.20	#endif
95	pajs	1.1
96	ats	1.20	/* Remove the extra space at the end, and append a \0. */
97			if (num_users != 0) {
98			pos--;
99	pajs	1.7	}
100	ats	1.20	VECTOR_RESIZE(name_list, pos + 1);
101			name_list[pos] = '\0';
102	pajs	1.5
103	ats	1.20	user_stats.num_entries = num_users;
104			user_stats.name_list = name_list;
105	pajs	1.5	return &user_stats;
106	pajs	1.1	}