NAME

       utmpx.h - user accounting database definitions

SYNOPSIS

       #include <utmpx.h>

DESCRIPTION

       The  <utmpx.h>  header  shall  define  the utmpx structure that shall include at least the
       following members:

              char            ut_user[]  User login name.
              char            ut_id[]    Unspecified initialization process identifier.
              char            ut_line[]  Device name.
              pid_t           ut_pid     Process ID.
              short           ut_type    Type of entry.
              struct timeval  ut_tv      Time entry was made.

       The pid_t type shall be defined through typedef as described in <sys/types.h> .

       The timeval structure shall be defined as described in <sys/time.h> .

       Inclusion of the <utmpx.h> header may also make visible all symbols from <sys/time.h>.

       The following symbolic constants shall be defined  as  possible  values  for  the  ut_type
       member of the utmpx structure:

       EMPTY  No valid user accounting information.

       BOOT_TIME
              Identifies time of system boot.

       OLD_TIME
              Identifies time when system clock changed.

       NEW_TIME
              Identifies time after system clock changed.

       USER_PROCESS
              Identifies a process.

       INIT_PROCESS
              Identifies a process spawned by the init process.

       LOGIN_PROCESS
              Identifies the session leader of a logged-in user.

       DEAD_PROCESS
              Identifies a session leader who has exited.

       The  following  shall be declared as functions and may also be defined as macros. Function
       prototypes shall be provided.

              void          endutxent(void);
              struct utmpx *getutxent(void);
              struct utmpx *getutxid(const struct utmpx *);
              struct utmpx *getutxline(const struct utmpx *);
              struct utmpx *pututxline(const struct utmpx *);
              void          setutxent(void);

       The following sections are informative.

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       <sys/time.h> , <sys/types.h> ,  the  System  Interfaces  volume  of  IEEE Std 1003.1-2001,
       endutxent()

COPYRIGHT

       Portions  of  this  text  are  reprinted  and  reproduced in electronic form from IEEE Std
       1003.1, 2003 Edition, Standard for Information Technology  --  Portable  Operating  System
       Interface  (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by
       the Institute of Electrical and Electronics Engineers, Inc and  The  Open  Group.  In  the
       event  of  any  discrepancy  between this version and the original IEEE and The Open Group
       Standard, the original IEEE and The Open Group  Standard  is  the  referee  document.  The
       original Standard can be obtained online at http://www.opengroup.org/unix/online.html .