1 | /* The `struct utmp' type, describing entries in the utmp file. |
2 | Copyright (C) 1993-2022 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 | <https://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. */ |
36 | struct lastlog |
37 | { |
38 | #if __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. */ |
50 | struct 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. */ |
58 | struct 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] |
63 | __attribute_nonstring__; /* Devicename. */ |
64 | char ut_id[4] |
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 |
71 | as DEAD_PROCESS. */ |
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. */ |
77 | struct |
78 | { |
79 | int32_t tv_sec; /* Seconds. */ |
80 | int32_t tv_usec; /* Microseconds. */ |
81 | } ut_tv; /* Time entry was made. */ |
82 | #else |
83 | long int ut_session; /* Session ID, used for windowing. */ |
84 | struct timeval ut_tv; /* Time entry was made. */ |
85 | #endif |
86 | |
87 | int32_t ut_addr_v6[4]; /* Internet address of remote host. */ |
88 | char __glibc_reserved[20]; /* Reserved for future use. */ |
89 | }; |
90 | |
91 | /* Backwards compatibility hacks. */ |
92 | #define ut_name ut_user |
93 | #ifndef _NO_UT_TIME |
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 |
97 | #endif |
98 | #define ut_xtime ut_tv.tv_sec |
99 | #define ut_addr ut_addr_v6[0] |
100 | |
101 | |
102 | /* Values for the `ut_type' field of a `struct utmp'. */ |
103 | #define EMPTY 0 /* No valid user accounting information. */ |
104 | |
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. */ |
109 | |
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. */ |
114 | |
115 | #define ACCOUNTING 9 |
116 | |
117 | /* Old Linux name for the EMPTY type. */ |
118 | #define UT_UNKNOWN EMPTY |
119 | |
120 | |
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 |
128 | |