utmpx.h
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上传日期:2009-04-28
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- /* Structures and definitions for the user accounting database. GNU version.
- Copyright (C) 1997, 1998, 2000, 2001, 2002 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
- #ifndef _UTMPX_H
- # error "Never include <bits/utmpx.h> directly; use <utmpx.h> instead."
- #endif
- #include <bits/types.h>
- #include <sys/time.h>
- #include <bits/wordsize.h>
- #ifdef __USE_GNU
- # include <paths.h>
- # define _PATH_UTMPX _PATH_UTMP
- # define _PATH_WTMPX _PATH_WTMP
- #endif
- #define __UT_LINESIZE 32
- #define __UT_NAMESIZE 32
- #define __UT_HOSTSIZE 256
- /* The structure describing the status of a terminated process. This
- type is used in `struct utmpx' below. */
- struct __exit_status
- {
- #ifdef __USE_GNU
- short int e_termination; /* Process termination status. */
- short int e_exit; /* Process exit status. */
- #else
- short int __e_termination; /* Process termination status. */
- short int __e_exit; /* Process exit status. */
- #endif
- };
- /* The structure describing an entry in the user accounting database. */
- struct utmpx
- {
- short int ut_type; /* Type of login. */
- __pid_t ut_pid; /* Process ID of login process. */
- char ut_line[__UT_LINESIZE]; /* Devicename. */
- char ut_id[4]; /* Inittab ID. */
- char ut_user[__UT_NAMESIZE]; /* Username. */
- char ut_host[__UT_HOSTSIZE]; /* Hostname for remote login. */
- struct __exit_status ut_exit; /* Exit status of a process marked
- as DEAD_PROCESS. */
- /* The fields ut_session and ut_tv must be the same size when compiled
- 32- and 64-bit. This allows files and shared memory to be shared
- between 32- and 64-bit applications. */
- #if __WORDSIZE == 64 && defined __WORDSIZE_COMPAT32
- __int32_t ut_session; /* Session ID, used for windowing. */
- struct
- {
- __int32_t tv_sec; /* Seconds. */
- __int32_t tv_usec; /* Microseconds. */
- } ut_tv; /* Time entry was made. */
- #else
- long int ut_session; /* Session ID, used for windowing. */
- struct timeval ut_tv; /* Time entry was made. */
- #endif
- __int32_t ut_addr_v6[4]; /* Internet address of remote host. */
- char __unused[20]; /* Reserved for future use. */
- };
- /* Values for the `ut_type' field of a `struct utmpx'. */
- #define EMPTY 0 /* No valid user accounting information. */
- #ifdef __USE_GNU
- # define RUN_LVL 1 /* The system's runlevel. */
- #endif
- #define BOOT_TIME 2 /* Time of system boot. */
- #define NEW_TIME 3 /* Time after system clock changed. */
- #define OLD_TIME 4 /* Time when system clock changed. */
- #define INIT_PROCESS 5 /* Process spawned by the init process. */
- #define LOGIN_PROCESS 6 /* Session leader of a logged in user. */
- #define USER_PROCESS 7 /* Normal process. */
- #define DEAD_PROCESS 8 /* Terminated process. */
- #ifdef __USE_GNU
- # define ACCOUNTING 9 /* System accounting. */
- #endif