1 /* The `struct utmp' type, describing entries in the utmp file.
2 Copyright (C) 1993-2024 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
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 <https://www.gnu.org/licenses/>. */
20 # error "Never include <bits/utmp.h> directly; use <utmp.h> instead."
25 #include <sys/types.h>
26 #include <bits/wordsize.h>
29 #define UT_LINESIZE 32
30 #define UT_NAMESIZE 32
31 #define UT_HOSTSIZE 256
34 /* The structure describing an entry in the database of
38 #if __WORDSIZE_TIME64_COMPAT32
43 char ll_line
[UT_LINESIZE
];
44 char ll_host
[UT_HOSTSIZE
];
48 /* The structure describing the status of a terminated process. This
49 type is used in `struct utmp' below. */
52 short int e_termination
; /* Process termination status. */
53 short int e_exit
; /* Process exit status. */
57 /* The structure describing an entry in the user accounting database. */
60 short int ut_type
; /* Type of login. */
61 pid_t ut_pid
; /* Process ID of login process. */
62 char ut_line
[UT_LINESIZE
]
63 __attribute_nonstring__
; /* Devicename. */
65 __attribute_nonstring__
; /* Inittab ID. */
66 char ut_user
[UT_NAMESIZE
]
67 __attribute_nonstring__
; /* Username. */
68 char ut_host
[UT_HOSTSIZE
]
69 __attribute_nonstring__
; /* Hostname for remote login. */
70 struct exit_status ut_exit
; /* Exit status of a process marked
72 /* The ut_session and ut_tv fields must be the same size when compiled
73 32- and 64-bit. This allows data files and shared memory to be
74 shared between 32- and 64-bit applications. */
75 #if __WORDSIZE_TIME64_COMPAT32
76 int32_t ut_session
; /* Session ID, used for windowing. */
79 int32_t tv_sec
; /* Seconds. */
80 int32_t tv_usec
; /* Microseconds. */
81 } ut_tv
; /* Time entry was made. */
83 long int ut_session
; /* Session ID, used for windowing. */
84 struct timeval ut_tv
; /* Time entry was made. */
87 int32_t ut_addr_v6
[4]; /* Internet address of remote host. */
88 char __glibc_reserved
[20]; /* Reserved for future use. */
91 /* Backwards compatibility hacks. */
92 #define ut_name ut_user
94 /* We have a problem here: `ut_time' is also used otherwise. Define
95 _NO_UT_TIME if the compiler complains. */
96 # define ut_time ut_tv.tv_sec
98 #define ut_xtime ut_tv.tv_sec
99 #define ut_addr ut_addr_v6[0]
102 /* Values for the `ut_type' field of a `struct utmp'. */
103 #define EMPTY 0 /* No valid user accounting information. */
105 #define RUN_LVL 1 /* The system's runlevel. */
106 #define BOOT_TIME 2 /* Time of system boot. */
107 #define NEW_TIME 3 /* Time after system clock changed. */
108 #define OLD_TIME 4 /* Time when system clock changed. */
110 #define INIT_PROCESS 5 /* Process spawned by the init process. */
111 #define LOGIN_PROCESS 6 /* Session leader of a logged in user. */
112 #define USER_PROCESS 7 /* Normal process. */
113 #define DEAD_PROCESS 8 /* Terminated process. */
117 /* Old Linux name for the EMPTY type. */
118 #define UT_UNKNOWN EMPTY
121 /* Tell the user that we have a modern system with UT_HOST, UT_PID,
122 UT_TYPE, UT_ID and UT_TV fields. */
123 #define _HAVE_UT_TYPE 1
124 #define _HAVE_UT_PID 1
125 #define _HAVE_UT_ID 1
126 #define _HAVE_UT_TV 1
127 #define _HAVE_UT_HOST 1