1/* The `struct utmp' type, describing entries in the utmp file. GNU version.
2 Copyright (C) 1993-2016 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
18
19#ifndef _UTMP_H
20# error "Never include <bits/utmp.h> directly; use <utmp.h> instead."
21#endif
22
23#include <paths.h>
24#include <sys/time.h>
25#include <sys/types.h>
26#include <bits/wordsize.h>
27
28
29#define UT_LINESIZE 32
30#define UT_NAMESIZE 32
31#define UT_HOSTSIZE 256
32
33
34/* The structure describing an entry in the database of
35 previous logins. */
36struct lastlog
37 {
38#ifdef __WORDSIZE_TIME64_COMPAT32
39 int32_t ll_time;
40#else
41 __time_t ll_time;
42#endif
43 char ll_line[UT_LINESIZE];
44 char ll_host[UT_HOSTSIZE];
45 };
46
47
48/* The structure describing the status of a terminated process. This
49 type is used in `struct utmp' below. */
50struct exit_status
51 {
52 short int e_termination; /* Process termination status. */
53 short int e_exit; /* Process exit status. */
54 };
55
56
57/* The structure describing an entry in the user accounting database. */
58struct utmp
59{
60 short int ut_type; /* Type of login. */
61 pid_t ut_pid; /* Process ID of login process. */
62 char ut_line[UT_LINESIZE]; /* Devicename. */
63 char ut_id[4]; /* Inittab ID. */
64 char ut_user[UT_NAMESIZE]; /* Username. */
65 char ut_host[UT_HOSTSIZE]; /* Hostname for remote login. */
66 struct exit_status ut_exit; /* Exit status of a process marked
67 as DEAD_PROCESS. */
68/* The ut_session and ut_tv fields must be the same size when compiled
69 32- and 64-bit. This allows data files and shared memory to be
70 shared between 32- and 64-bit applications. */
71#ifdef __WORDSIZE_TIME64_COMPAT32
72 int32_t ut_session; /* Session ID, used for windowing. */
73 struct
74 {
75 int32_t tv_sec; /* Seconds. */
76 int32_t tv_usec; /* Microseconds. */
77 } ut_tv; /* Time entry was made. */
78#else
79 long int ut_session; /* Session ID, used for windowing. */
80 struct timeval ut_tv; /* Time entry was made. */
81#endif
82
83 int32_t ut_addr_v6[4]; /* Internet address of remote host. */
84 char __glibc_reserved[20]; /* Reserved for future use. */
85};
86
87/* Backwards compatibility hacks. */
88#define ut_name ut_user
89#ifndef _NO_UT_TIME
90/* We have a problem here: `ut_time' is also used otherwise. Define
91 _NO_UT_TIME if the compiler complains. */
92# define ut_time ut_tv.tv_sec
93#endif
94#define ut_xtime ut_tv.tv_sec
95#define ut_addr ut_addr_v6[0]
96
97
98/* Values for the `ut_type' field of a `struct utmp'. */
99#define EMPTY 0 /* No valid user accounting information. */
100
101#define RUN_LVL 1 /* The system's runlevel. */
102#define BOOT_TIME 2 /* Time of system boot. */
103#define NEW_TIME 3 /* Time after system clock changed. */
104#define OLD_TIME 4 /* Time when system clock changed. */
105
106#define INIT_PROCESS 5 /* Process spawned by the init process. */
107#define LOGIN_PROCESS 6 /* Session leader of a logged in user. */
108#define USER_PROCESS 7 /* Normal process. */
109#define DEAD_PROCESS 8 /* Terminated process. */
110
111#define ACCOUNTING 9
112
113/* Old Linux name for the EMPTY type. */
114#define UT_UNKNOWN EMPTY
115
116
117/* Tell the user that we have a modern system with UT_HOST, UT_PID,
118 UT_TYPE, UT_ID and UT_TV fields. */
119#define _HAVE_UT_TYPE 1
120#define _HAVE_UT_PID 1
121#define _HAVE_UT_ID 1
122#define _HAVE_UT_TV 1
123#define _HAVE_UT_HOST 1
124