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001: /* The `struct utmp' type, describing entries in the utmp file.  GNU version.
002:    Copyright (C) 1993, 1996, 1997, 1998, 1999, 2002
003:    Free Software Foundation, Inc.
004:    This file is part of the GNU C Library.
005: 
006:    The GNU C Library is free software; you can redistribute it and/or
007:    modify it under the terms of the GNU Lesser General Public
008:    License as published by the Free Software Foundation; either
009:    version 2.1 of the License, or (at your option) any later version.
010: 
011:    The GNU C Library is distributed in the hope that it will be useful,
012:    but WITHOUT ANY WARRANTY; without even the implied warranty of
013:    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014:    Lesser General Public License for more details.
015: 
016:    You should have received a copy of the GNU Lesser General Public
017:    License along with the GNU C Library; if not, write to the Free
018:    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
019:    02111-1307 USA.  */
020: 
021: #ifndef _UTMP_H
022: # error "Never include <bits/utmp.h> directly; use <utmp.h> instead."
023: #endif
024: 
025: #include <paths.h>
026: #include <sys/time.h>
027: #include <sys/types.h>
028: #include <bits/wordsize.h>
029: 
030: 
031: #define UT_LINESIZE     32
032: #define UT_NAMESIZE     32
033: #define UT_HOSTSIZE     256
034: 
035: 
036: /* The structure describing an entry in the database of
037:    previous logins.  */
038: struct lastlog
039:   {
040: #if __WORDSIZE == 64 && defined __WORDSIZE_COMPAT32
041:     int32_t ll_time;
042: #else
043:     __time_t ll_time;
044: #endif
045:     char ll_line[UT_LINESIZE];
046:     char ll_host[UT_HOSTSIZE];
047:   };
048: 
049: 
050: /* The structure describing the status of a terminated process.  This
051:    type is used in `struct utmp' below.  */
052: struct exit_status
053:   {
054:     short int e_termination;    /* Process termination status.  */
055:     short int e_exit;           /* Process exit status.  */
056:   };
057: 
058: 
059: /* The structure describing an entry in the user accounting database.  */
060: struct utmp
061: {
062:   short int ut_type;            /* Type of login.  */
063:   pid_t ut_pid;                 /* Process ID of login process.  */
064:   char ut_line[UT_LINESIZE];    /* Devicename.  */
065:   char ut_id[4];                /* Inittab ID.  */
066:   char ut_user[UT_NAMESIZE];    /* Username.  */
067:   char ut_host[UT_HOSTSIZE];    /* Hostname for remote login.  */
068:   struct exit_status ut_exit;   /* Exit status of a process marked
069:                                    as DEAD_PROCESS.  */
070: /* The ut_session and ut_tv fields must be the same size when compiled
071:    32- and 64-bit.  This allows data files and shared memory to be
072:    shared between 32- and 64-bit applications.  */
073: #if __WORDSIZE == 64 && defined __WORDSIZE_COMPAT32
074:   int32_t ut_session;           /* Session ID, used for windowing.  */
075:   struct
076:   {
077:     int32_t tv_sec;             /* Seconds.  */
078:     int32_t tv_usec;            /* Microseconds.  */
079:   } ut_tv;                      /* Time entry was made.  */
080: #else
081:   long int ut_session;          /* Session ID, used for windowing.  */
082:   struct timeval ut_tv;         /* Time entry was made.  */
083: #endif
084: 
085:   int32_t ut_addr_v6[4];        /* Internet address of remote host.  */
086:   char __unused[20];            /* Reserved for future use.  */
087: };
088: 
089: /* Backwards compatibility hacks.  */
090: #define ut_name         ut_user
091: #ifndef _NO_UT_TIME
092: /* We have a problem here: `ut_time' is also used otherwise.  Define
093:    _NO_UT_TIME if the compiler complains.  */
094: # define ut_time        ut_tv.tv_sec
095: #endif
096: #define ut_xtime        ut_tv.tv_sec
097: #define ut_addr         ut_addr_v6[0]
098: 
099: 
100: /* Values for the `ut_type' field of a `struct utmp'.  */
101: #define EMPTY           0       /* No valid user accounting information.  */
102: 
103: #define RUN_LVL         1       /* The system's runlevel.  */
104: #define BOOT_TIME       2       /* Time of system boot.  */
105: #define NEW_TIME        3       /* Time after system clock changed.  */
106: #define OLD_TIME        4       /* Time when system clock changed.  */
107: 
108: #define INIT_PROCESS    5       /* Process spawned by the init process.  */
109: #define LOGIN_PROCESS   6       /* Session leader of a logged in user.  */
110: #define USER_PROCESS    7       /* Normal process.  */
111: #define DEAD_PROCESS    8       /* Terminated process.  */
112: 
113: #define ACCOUNTING      9
114: 
115: /* Old Linux name for the EMPTY type.  */
116: #define UT_UNKNOWN      EMPTY
117: 
118: 
119: /* Tell the user that we have a modern system with UT_HOST, UT_PID,
120:    UT_TYPE, UT_ID and UT_TV fields.  */
121: #define _HAVE_UT_TYPE   1
122: #define _HAVE_UT_PID    1
123: #define _HAVE_UT_ID     1
124: #define _HAVE_UT_TV     1
125: #define _HAVE_UT_HOST   1
126: 

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