1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
/*
* Copyright (c) 1988 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley. The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#include <sys/types.h>
#include <sys/file.h>
#include <stdio.h>
#include <string.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <syslog.h>
#include <utmp.h>
#ifdef HAVE_SETUTXENT
#include <utmpx.h>
#endif
#ifndef UTMP_FILE
#define UTMP_FILE "/etc/utmp"
#endif
#ifndef WTMP_FILE
#define WTMP_FILE "/usr/adm/wtmp"
#endif
#ifndef EMPTY
/* linux has UT_UNKNOWN but not EMPTY */
#define EMPTY UT_UNKNOWN
#endif
void update_utmp();
void update_wtmp();
void logwtmp();
void update_utmp(ent, username, line, host)
struct utmp *ent;
char *username, *line, *host;
{
#ifdef HAVE_SETUTENT
struct utmp ut;
#else
struct stat statb;
int tty;
#endif
#ifdef HAVE_SETUTXENT
struct utmpx utx;
#endif
#ifndef NO_UT_PID
char *tmpx;
char utmp_id[5];
#endif
int fd;
strncpy(ent->ut_line, line+sizeof("/dev/")-1, sizeof(ent->ut_line));
ent->ut_time = time(0);
#ifndef NO_UT_HOST
if (host)
strncpy(ent->ut_host, host, sizeof(ent->ut_host));
else
ent->ut_host[0] = '\0';
#endif
#ifndef NO_UT_PID
tmpx = line + strlen(line)-1;
if (*(tmpx-1) != '/') tmpx--; /* last two characters, unless it's a / */
sprintf(utmp_id, "kl%s", tmpx);
strncpy(ent->ut_id, utmp_id, sizeof(ent->ut_id));
strncpy(ent->ut_user, username, sizeof(ent->ut_user));
#else
strncpy(ent->ut_name, username, sizeof(ent->ut_name));
#endif
#ifdef HAVE_SETUTENT
utmpname(UTMP_FILE);
setutent();
pututline(ent);
endutent();
#if 0
/* XXX -- NOT NEEDED ANYMORE */
if (ent->ut_type == DEAD_PROCESS) {
if ((fd = open(UTMP_FILE, O_RDWR)) >= 0) {
int cnt = 0;
while(read(fd, (char *)&ut, sizeof(ut)) == sizeof(ut)) {
if (!strncmp(ut.ut_id, ent->ut_id, sizeof(ut.ut_id))) {
(void) memset(ut.ut_host, 0, sizeof(ut.ut_host));
(void) memset(ut.ut_user, 0, sizeof(ut.ut_user));
(void) time(&ut.ut_time);
ut.ut_exit.e_exit = ut.ut_pid = 0;
ut.ut_type = EMPTY;
(void) lseek(fd, -sizeof(ut), SEEK_CUR);
(void) write(fd, &ut, sizeof(ut));
}
cnt++;
}
close(fd);
}
}
#endif
#ifdef HAVE_SETUTXENT
setutxent();
getutmpx(ent, &utx);
pututxline(&utx);
endutxent();
#endif /* HAVE_SETUTXENT */
#else /* HAVE_SETUTENT */
tty = ttyslot();
if (tty > 0 && (fd = open(UTMP_FILE, O_WRONLY, 0)) >= 0) {
(void)lseek(fd, (off_t)(tty * sizeof(struct utmp)), SEEK_SET);
(void)write(fd, (char *)ent, sizeof(struct utmp));
(void)close(fd);
}
#endif /* HAVE_SETUTENT */
update_wtmp(ent);
}
void update_wtmp(ent)
struct utmp *ent;
{
struct utmp ut;
struct stat statb;
int fd;
#ifdef HAVE_SETUTXENT
struct utmpx utx;
getutmpx(ent, &utx);
updwtmpx(WTMPX_FILE, &utx);
#endif
#ifdef HAVE_UPDWTMP
updwtmp(WTMP_FILE, ent);
#else /* HAVE_UPDWTMP */
if ((fd = open(WTMP_FILE, O_WRONLY|O_APPEND, 0)) >= 0) {
if (!fstat(fd, &statb)) {
(void)memset((char *)&ut, 0, sizeof(ut));
(void)strncpy(ut.ut_line, ent->ut_line, sizeof(ut.ut_line));
(void)strncpy(ut.ut_name, ent->ut_name, sizeof(ut.ut_name));
#ifndef NO_UT_HOST
(void)strncpy(ut.ut_host, ent->ut_host, sizeof(ut.ut_host));
#endif
(void)time(&ut.ut_time);
#if defined(HAVE_GETUTENT) && defined(USER_PROCESS)
if (ent->ut_name) {
if (!ut.ut_pid)
ut.ut_pid = getpid();
ut.ut_type = USER_PROCESS;
} else {
ut.ut_type = EMPTY;
}
#endif
if (write(fd, (char *)&ut, sizeof(struct utmp)) !=
sizeof(struct utmp))
(void)ftruncate(fd, statb.st_size);
}
(void)close(fd);
}
#endif /* HAVE_UPDWTMP */
}
#ifndef HAVE_LOGWTMP
void logwtmp(tty, locuser, host)
char *tty;
char *locuser;
char *host;
{
struct utmp ut;
char *tmpx;
char utmp_id[5];
/* Will be empty for logout */
int loggingin = locuser[0];
#ifndef NO_UT_HOST
strncpy(ut.ut_host, host, sizeof(ut.ut_host));
#endif
strncpy(ut.ut_line, tty, sizeof(ut.ut_line));
ut.ut_time = time(0);
#ifndef NO_UT_PID
ut.ut_pid = getpid();
strncpy(ut.ut_user, locuser, sizeof(ut.ut_user));
tmpx = tty + strlen(tty) - 2;
sprintf(utmp_id, "kr%s", tmpx);
strncpy(ut.ut_id, utmp_id, sizeof(ut.ut_id));
ut.ut_pid = (loggingin ? getpid() : 0);
ut.ut_type = (loggingin ? USER_PROCESS : DEAD_PROCESS);
#else
strncpy(ut.ut_name, locuser, sizeof(ut.ut_name));
#endif
update_wtmp(&ut);
}
#endif
|
