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5361ad3910
These fields store timestamps when the system was running. No Linux systems existed before 1970, so these values are unused. Switching to unsigned types allows continued use of the existing struct layouts beyond the year 2038. The intent is to give distributions more time to switch to improved interfaces that also avoid locking/data corruption issues. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
107 lines
3.5 KiB
C
107 lines
3.5 KiB
C
/* Structures and definitions for the user accounting database. GNU version.
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Copyright (C) 1997-2024 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 _UTMPX_H
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# error "Never include <bits/utmpx.h> directly; use <utmpx.h> instead."
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#endif
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#include <bits/types.h>
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#include <sys/time.h>
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#include <bits/wordsize.h>
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#ifdef __USE_GNU
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# include <paths.h>
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# define _PATH_UTMPX _PATH_UTMP
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# define _PATH_WTMPX _PATH_WTMP
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#endif
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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 the status of a terminated process. This
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type is used in `struct utmpx' below. */
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struct __exit_status
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{
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#ifdef __USE_GNU
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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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#else
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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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#endif
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};
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/* The structure describing an entry in the user accounting database. */
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struct utmpx
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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 fields ut_session and ut_tv must be the same size when compiled
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32- and 64-bit. This allows files and shared memory to be shared
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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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__uint32_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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/* Values for the `ut_type' field of a `struct utmpx'. */
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#define EMPTY 0 /* No valid user accounting information. */
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#ifdef __USE_GNU
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# define RUN_LVL 1 /* The system's runlevel. */
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#endif
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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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#ifdef __USE_GNU
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# define ACCOUNTING 9 /* System accounting. */
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#endif
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