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
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
|
/*
* Copyright (c) 2004 Gunnar Ritter
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute
* it freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
*
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
*
* 3. This notice may not be removed or altered from any source distribution.
*/
/* Sccsid @(#)utmpx.c 1.13 (gritter) 12/16/07 */
#include <stdio.h>
#if defined (__FreeBSD__) || defined (__dietlibc__) || defined (__NetBSD__) || \
defined (__UCLIBC__) || defined (__OpenBSD__) || \
defined (__DragonFly__) || \
defined (__APPLE__) && \
(__MAC_OS_X_VERSION_MIN_REQUIRED < __MAC_OS_X_VERSION_10_5)
#include <sys/types.h>
#include <sys/time.h>
#include <utmp.h>
#include <string.h>
#include "utmpx.h"
static FILE *utfp;
static struct utmpx utx;
static const char *utmpfile = _PATH_UTMP;
static FILE *
init(void)
{
if (utfp == NULL && (utfp = fopen(utmpfile, "r+")) == NULL)
if ((utfp = fopen(utmpfile, "r")) == NULL)
return NULL;
return utfp;
}
static struct utmpx *
utmp2utmpx(struct utmpx *ux, const struct utmp *up)
{
#ifndef __dietlibc__
memset(ux, 0, sizeof *ux);
ux->ut_tv.tv_sec = up->ut_time;
memcpy(ux->ut_line, up->ut_line, UT_LINESIZE);
memcpy(ux->ut_user, up->ut_name, UT_NAMESIZE);
memcpy(ux->ut_host, up->ut_host, UT_HOSTSIZE);
if (strcmp(up->ut_line, "~") == 0)
ux->ut_type = BOOT_TIME;
else if (strcmp(up->ut_line, "|") == 0)
ux->ut_type = OLD_TIME;
else if (strcmp(up->ut_line, "}") == 0)
ux->ut_type = NEW_TIME;
else if (*up->ut_name == 0)
ux->ut_type = DEAD_PROCESS;
else
ux->ut_type = USER_PROCESS;
#else /* __dietlibc__ */
*ux = *up;
#endif /* __dietlibc__ */
return ux;
}
static struct utmp *
utmpx2utmp(struct utmp *up, const struct utmpx *ux)
{
#ifndef __dietlibc__
memset(up, 0, sizeof *up);
up->ut_time = ux->ut_tv.tv_sec;
switch (ux->ut_type) {
case DEAD_PROCESS:
memcpy(up->ut_line, ux->ut_line, UT_LINESIZE);
break;
default:
case EMPTY:
case INIT_PROCESS:
case LOGIN_PROCESS:
case RUN_LVL:
case ACCOUNTING:
return NULL;
case BOOT_TIME:
strcpy(up->ut_name, "reboot");
strcpy(up->ut_line, "~");
break;
case OLD_TIME:
strcpy(up->ut_name, "date");
strcpy(up->ut_line, "|");
break;
case NEW_TIME:
strcpy(up->ut_name, "date");
strcpy(up->ut_line, "{");
break;
case USER_PROCESS:
memcpy(up->ut_line, ux->ut_line, UT_LINESIZE);
memcpy(up->ut_name, ux->ut_user, UT_NAMESIZE);
memcpy(up->ut_host, ux->ut_host, UT_HOSTSIZE);
}
#else /* __dietlibc__ */
*up = *ux;
#endif /* __dietlibc__ */
return up;
}
struct utmpx *
getutxent(void)
{
static struct utmp zero;
struct utmp ut;
if (init() == NULL)
return NULL;
do {
if (fread(&ut, sizeof ut, 1, utfp) != 1)
return NULL;
} while (memcmp(&ut, &zero, sizeof ut) == 0);
return utmp2utmpx(&utx, &ut);
}
struct utmpx *
getutxline(const struct utmpx *ux)
{
struct utmp ut;
if (init() == NULL)
return NULL;
fseek(utfp, 0, SEEK_SET);
while (fread(&ut, sizeof ut, 1, utfp) == 1) {
utmp2utmpx(&utx, &ut);
if ((utx.ut_type == LOGIN_PROCESS ||
utx.ut_type == USER_PROCESS) &&
strcmp(ut.ut_line, utx.ut_line) == 0)
return &utx;
}
return NULL;
}
struct utmpx *
getutxid(const struct utmpx *ux)
{
#ifdef __dietlibc__
struct utmp ut;
#endif
if (init() == NULL)
return NULL;
#ifdef __dietlibc__
fseek(utfp, 0, SEEK_SET);
while (fread(&ut, sizeof ut, 1, utfp) == 1) {
utmp2utmpx(&utx, &ut);
switch (ux->ut_type) {
case BOOT_TIME:
case OLD_TIME:
case NEW_TIME:
if (ux->ut_type == utx.ut_type)
return &utx;
break;
case INIT_PROCESS:
case LOGIN_PROCESS:
case USER_PROCESS:
case DEAD_PROCESS:
if (ux->ut_type == utx.ut_type &&
ux->ut_id == utx.ut_id)
return &utx;
break;
}
}
#endif /* __dietlibc__ */
return NULL;
}
void
setutxent(void)
{
if (init() == NULL)
return;
fseek(utfp, 0, SEEK_SET);
}
void
endutxent(void)
{
FILE *fp;
if (init() == NULL)
return;
fp = utfp;
utfp = NULL;
fclose(fp);
}
int
utmpxname(const char *name)
{
utmpfile = strdup(name);
return 0;
}
extern struct utmpx *
pututxline(const struct utmpx *up)
{
struct utmp ut;
struct utmpx *rp;
if (init() == NULL)
return NULL;
/*
* Cannot use getutxid() because there is no id field. Use
* the equivalent of getutxline() instead.
*/
while (fread(&ut, sizeof ut, 1, utfp) == 1) {
if (strncmp(ut.ut_line, up->ut_line, UT_LINESIZE) == 0) {
fseek(utfp, -sizeof ut, SEEK_CUR);
break;
}
}
fflush(utfp);
if (utmpx2utmp(&ut, up) == NULL)
rp = NULL;
else if (fwrite(&ut, sizeof ut, 1, utfp) == 1) {
utx = *up;
rp = &utx;
} else
rp = NULL;
fflush(utfp);
return rp;
}
extern void
updwtmpx(const char *name, const struct utmpx *up)
{
FILE *fp;
if ((fp = fopen(name, "a")) == NULL)
return;
fwrite(up, sizeof *up, 1, fp);
fclose(fp);
}
#endif /* __FreeBSD__ || __dietlibc__ || __NetBSD__ || __UCLIBC__ ||
__OpenBSD__ || __DragonFly__ || __APPLE__ */
|
