This repository has been archived by the owner on Jul 11, 2024. It is now read-only.
-
Notifications
You must be signed in to change notification settings - Fork 59
/
Copy pathcheck_wtmpx.c
206 lines (197 loc) · 7.03 KB
/
check_wtmpx.c
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
/*
* @(#)check_wtmpx.c 0.02 beta 2001/06/27 NsFocus Copyleft 2001-2010
*------------------------------------------------------------------------
* File : check_wtmpx.c
* Version : 0.02 beta
* Platform : SPARC/Solaris 2.6/7
* Author : NsFocus Security Team
* : http://www.nsfocus.com
* Fix : scz < mailto: [email protected] >
* Compile : gcc -Wall -O3 -o check_wtmpx check_wtmpx.c
* : /usr/ccs/bin/strip check_wtmpx
* : /usr/ccs/bin/mcs -d check_wtmpx
* Date : 2001-06-27 11:36
*/
#if !defined(__SunOS__) && !defined(SOLARIS2)
int main () { return 0; }
#else
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/file.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <pwd.h>
#include <time.h>
#include <utmp.h>
#include <utmpx.h>
#include <lastlog.h>
#include <fcntl.h>
#include <unistd.h>
#define WTMP_FILENAME "/var/adm/wtmp"
#define WTMPX_FILENAME "/var/adm/wtmpx"
struct file_utmp_entry
{
char ut_user[8]; /* User login name */
char ut_id[4]; /* /etc/inittab id */
char ut_line[12]; /* device name (console, lnxx) */
int16_t ut_pid; /* process id */
int16_t ut_type; /* type of entry */
struct
{
int16_t e_termination; /* Process termination status */
int16_t e_exit; /* Process exit status */
} ut_exit; /* The exit status of a process */
uint32_t ut_time; /* time entry was made */
};
struct timeval_32
{
uint32_t tv_sec; /* seconds */
int32_t tv_usec; /* and microseconds */
};
/*
* This data structure describes the utmp *file* contents using
* fixed-width data types. It should only be used by the implementation.
*
* Applications should use the getutxent(3c) family of routines to interact
* with this database.
*/
struct file_utmpx_entry
{
char ut_user[32]; /* user login name */
char ut_id[4]; /* inittab id */
char ut_line[32]; /* device name (console, lnxx) */
uint32_t ut_pid; /* process id */
int16_t ut_type; /* type of entry */
struct
{
int16_t e_termination; /* process termination status */
int16_t e_exit; /* process exit status */
} ut_exit; /* exit status of a process */
struct timeval_32 ut_tv; /* time entry was made */
int32_t ut_session; /* session ID, user for windowing */
int32_t pad[5]; /* reserved for future use */
int16_t ut_syslen; /* significant length of ut_host */
char ut_host[257]; /* remote host name */
};
static void usage ( char * arg )
{
fprintf( stderr, " Usage: %s [-h] [-w wtmp] [-x wtmpx]\n", arg );
exit( EXIT_FAILURE );
} /* end of usage */
int main ( int argc, char * argv[] )
{
int fd_wtmp, fd_wtmpx;
char filename_wtmp[128] = WTMP_FILENAME;
char filename_wtmpx[128] = WTMPX_FILENAME;
ssize_t wtmp_bytes_read;
ssize_t wtmpx_bytes_read;
uint32_t wtmp_read_counter = 0;
uint32_t wtmpx_read_counter = 0;
int c;
struct file_utmp_entry utmp_entry;
struct file_utmpx_entry utmpx_entry;
opterr = 0; /* Don't want getopt() writing to stderr */
while ( ( c = getopt( argc, argv, "hw:x:" ) ) != EOF )
{
switch ( c )
{
case 'w':
strncpy( filename_wtmp, optarg, 128 );
filename_wtmp[127] = '\0';
break;
case 'x':
strncpy( filename_wtmpx, optarg, 128 );
filename_wtmpx[127] = '\0';
break;
case 'h':
case '?':
usage( argv[0] );
break;
} /* end of switch */
} /* end of while */
fd_wtmp = open( filename_wtmp, O_RDONLY );
if ( fd_wtmp < 0 )
{
fprintf( stderr, "Unable to open %s\n", filename_wtmp );
return( EXIT_FAILURE );
}
fd_wtmpx = open( filename_wtmpx, O_RDONLY );
if ( fd_wtmpx < 0 )
{
fprintf( stderr, "Unable to open %s\n", filename_wtmpx );
close( fd_wtmp );
return( EXIT_FAILURE );
}
while ( 1 )
{
wtmpx_bytes_read = read( fd_wtmpx, &utmpx_entry, sizeof( struct file_utmpx_entry ) );
if ( wtmpx_bytes_read > 0 )
{
if ( wtmpx_bytes_read < sizeof( struct file_utmpx_entry ) )
{
fprintf( stderr, "wtmpx entry may be corrupted\n" );
break;
}
wtmpx_read_counter++;
}
wtmp_bytes_read = read( fd_wtmp, &utmp_entry, sizeof( struct file_utmp_entry ) );
if ( wtmp_bytes_read > 0 )
{
if ( wtmp_bytes_read < sizeof( struct file_utmp_entry ) )
{
fprintf( stderr, "wtmp entry may be corrupted\n" );
break;
}
wtmp_read_counter++;
}
if ( ( wtmpx_bytes_read <= 0 ) || ( wtmp_bytes_read <= 0 ) )
{
break;
}
if ( strncmp( utmp_entry.ut_user, utmpx_entry.ut_user, 8 ) != 0 )
{
fprintf( stderr, "[ %u ] ut_user %s <-> %s\n", wtmp_read_counter,
utmp_entry.ut_user, utmpx_entry.ut_user );
break;
}
if ( memcmp( utmp_entry.ut_id, utmpx_entry.ut_id, 4 ) != 0 )
{
fprintf( stderr, "[ %u ] utmp_entry.ut_id != utmpx_entry.ut_id\n", wtmp_read_counter );
break;
}
if ( strcmp( utmp_entry.ut_line, utmpx_entry.ut_line ) != 0 )
{
fprintf( stderr, "[ %u ] ut_line %s <-> %s\n", wtmp_read_counter,
utmp_entry.ut_line, utmpx_entry.ut_line );
break;
}
if ( utmp_entry.ut_pid != utmpx_entry.ut_pid )
{
fprintf( stderr, "[ %u ] ut_pid %d <-> %d\n", wtmp_read_counter,
utmp_entry.ut_pid, utmpx_entry.ut_pid );
break;
}
if ( utmp_entry.ut_type != utmpx_entry.ut_type )
{
fprintf( stderr, "[ %u ] ut_type %d <-> %d\n", wtmp_read_counter,
utmp_entry.ut_type, utmpx_entry.ut_type );
break;
}
if ( utmp_entry.ut_time != utmpx_entry.ut_tv.tv_sec )
{
fprintf( stderr, "[ %u ] ut_time %08X <-> %08X\n", wtmp_read_counter,
utmp_entry.ut_time, utmpx_entry.ut_tv.tv_sec );
break;
}
} /* end of while */
if ( wtmpx_read_counter != wtmp_read_counter )
{
fprintf( stderr, "wtmpx or wtmp entry may be deleted\n" );
}
close( fd_wtmpx );
close( fd_wtmp );
return( EXIT_SUCCESS );
} /* end of main */
#endif