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128 lines
4.0 KiB
C
128 lines
4.0 KiB
C
/* The `struct utmp' type, describing entries in the utmp file.
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Copyright (C) 1993-2023 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef _UTMP_H
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# error "Never include <bits/utmp.h> directly; use <utmp.h> instead."
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#endif
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#include <paths.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <bits/wordsize.h>
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#define UT_LINESIZE 32
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#define UT_NAMESIZE 32
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#define UT_HOSTSIZE 256
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/* The structure describing an entry in the database of
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previous logins. */
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struct lastlog
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{
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#if __WORDSIZE_TIME64_COMPAT32
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int32_t ll_time;
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#else
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__time_t ll_time;
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#endif
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char ll_line[UT_LINESIZE];
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char ll_host[UT_HOSTSIZE];
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};
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/* The structure describing the status of a terminated process. This
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type is used in `struct utmp' below. */
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struct exit_status
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{
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short int e_termination; /* Process termination status. */
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short int e_exit; /* Process exit status. */
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};
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/* The structure describing an entry in the user accounting database. */
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struct utmp
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{
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short int ut_type; /* Type of login. */
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pid_t ut_pid; /* Process ID of login process. */
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char ut_line[UT_LINESIZE]
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__attribute_nonstring__; /* Devicename. */
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char ut_id[4]
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__attribute_nonstring__; /* Inittab ID. */
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char ut_user[UT_NAMESIZE]
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__attribute_nonstring__; /* Username. */
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char ut_host[UT_HOSTSIZE]
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__attribute_nonstring__; /* Hostname for remote login. */
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struct exit_status ut_exit; /* Exit status of a process marked
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as DEAD_PROCESS. */
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/* The ut_session and ut_tv fields must be the same size when compiled
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32- and 64-bit. This allows data files and shared memory to be
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shared between 32- and 64-bit applications. */
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#if __WORDSIZE_TIME64_COMPAT32
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int32_t ut_session; /* Session ID, used for windowing. */
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struct
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{
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int32_t tv_sec; /* Seconds. */
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int32_t tv_usec; /* Microseconds. */
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} ut_tv; /* Time entry was made. */
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#else
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long int ut_session; /* Session ID, used for windowing. */
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struct timeval ut_tv; /* Time entry was made. */
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#endif
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int32_t ut_addr_v6[4]; /* Internet address of remote host. */
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char __glibc_reserved[20]; /* Reserved for future use. */
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};
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/* Backwards compatibility hacks. */
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#define ut_name ut_user
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#ifndef _NO_UT_TIME
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/* We have a problem here: `ut_time' is also used otherwise. Define
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_NO_UT_TIME if the compiler complains. */
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# define ut_time ut_tv.tv_sec
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#endif
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#define ut_xtime ut_tv.tv_sec
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#define ut_addr ut_addr_v6[0]
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/* Values for the `ut_type' field of a `struct utmp'. */
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#define EMPTY 0 /* No valid user accounting information. */
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#define RUN_LVL 1 /* The system's runlevel. */
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#define BOOT_TIME 2 /* Time of system boot. */
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#define NEW_TIME 3 /* Time after system clock changed. */
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#define OLD_TIME 4 /* Time when system clock changed. */
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#define INIT_PROCESS 5 /* Process spawned by the init process. */
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#define LOGIN_PROCESS 6 /* Session leader of a logged in user. */
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#define USER_PROCESS 7 /* Normal process. */
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#define DEAD_PROCESS 8 /* Terminated process. */
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#define ACCOUNTING 9
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/* Old Linux name for the EMPTY type. */
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#define UT_UNKNOWN EMPTY
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/* Tell the user that we have a modern system with UT_HOST, UT_PID,
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UT_TYPE, UT_ID and UT_TV fields. */
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#define _HAVE_UT_TYPE 1
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#define _HAVE_UT_PID 1
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#define _HAVE_UT_ID 1
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#define _HAVE_UT_TV 1
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#define _HAVE_UT_HOST 1
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