sysdeps/gnu/bits/utmp.h

   1 /* The `struct utmp' type, describing entries in the utmp file.  GNU version.
   2    Copyright (C) 1993, 1996, 1997 Free Software Foundation, Inc.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Library General Public License as
   6    published by the Free Software Foundation; either version 2 of the
   7    License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 #ifndef _UTMP_H
  20 #error "Never use <bits/utmp.h> directly; include <utmpx.h> instead."
  21 #endif
  22
  23 #include <paths.h>
  24 #include <sys/time.h>
  25 #include <sys/types.h>
  26
  27
  28 #define UT_LINESIZE     32
  29 #define UT_NAMESIZE     32
  30 #define UT_HOSTSIZE     256
  31
  32
  33 /* The structure describing an entry in the database of
  34    previous logins.  */
  35 struct lastlog
  36 {
  37   time_t ll_time;
  38   char ll_line[UT_LINESIZE];
  39   char ll_host[UT_HOSTSIZE];
  40 };
  41
  42
  43 /* The structure describing the status of a terminated process.  This
  44    type is used in `struct utmp' below.  */
  45 struct exit_status
  46 {
  47   short int e_termination;      /* Process termination status.  */
  48   short int e_exit;             /* Process exit status.  */
  49 };
  50
  51
  52 /* The structure describing an entry in the user accounting database.  */
  53 struct utmp
  54 {
  55   short int ut_type;            /* Type of login.  */
  56   pid_t ut_pid;                 /* Process ID of login process.  */
  57   char ut_line[UT_LINESIZE];    /* Devicename.  */
  58   char ut_id[4];                /* Inittab ID.  */
  59   char ut_user[UT_NAMESIZE];    /* Username.  */
  60   char ut_host[UT_HOSTSIZE];    /* Hostname for remote login.  */
  61   struct exit_status ut_exit;   /* Exit status of a process marked
  62                                    as DEAD_PROCESS.  */
  63   long ut_session;              /* Session ID, used for windowing.  */
  64   struct timeval ut_tv;         /* Time entry was made.  */
  65   int32_t ut_addr_v6[4];        /* Internet address of remote host.  */
  66   char pad[20];                 /* Reserved for future use.  */
  67 };
  68
  69 /* Backwards compatibility hacks.  */
  70 #define ut_name         ut_user
  71 #ifndef _NO_UT_TIME
  72 /* We have a problem here: `ut_time' is also used otherwise.  Define
  73    _NO_UT_TIME if the compiler complains.  */
  74 # define ut_time        ut_tv.tv_sec
  75 #endif
  76 #define ut_xtime        ut_tv.tv_sec
  77 #define ut_addr         ut_addr_v6[0]
  78
  79
  80 /* Values for the `ut_type' field of a `struct utmp'.  */
  81 #define EMPTY           0       /* No valid user accounting information.  */
  82
  83 #define RUN_LVL         1       /* The system's runlevel.  */
  84 #define BOOT_TIME       2       /* Time of system boot.  */
  85 #define NEW_TIME        3       /* Time after system clock changed.  */
  86 #define OLD_TIME        4       /* Time when system clock changed.  */
  87
  88 #define INIT_PROCESS    5       /* Process spawned by the init process.  */
  89 #define LOGIN_PROCESS   6       /* Session leader of a logged in user.  */
  90 #define USER_PROCESS    7       /* Normal process.  */
  91 #define DEAD_PROCESS    8       /* Terminated process.  */
  92
  93 #define ACCOUNTING      9
  94
  95 /* Old Linux name for the EMPTY type.  */
  96 #define UT_UNKNOWN      EMPTY
  97
  98
  99 /* Tell the user that we have a modern system with UT_HOST, UT_PID,
 100    UT_TYPE, UT_ID and UT_TV fields.  */
 101 #define _HAVE_UT_TYPE   1
 102 #define _HAVE_UT_PID    1
 103 #define _HAVE_UT_ID     1
 104 #define _HAVE_UT_TV     1
 105 #define _HAVE_UT_HOST   1