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<utmpx.h>(P)		   POSIX Programmer's Manual		  <utmpx.h>(P)

PROLOG
       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
       implementation of this interface may differ (consult the	 corresponding
       Linux  manual page for details of Linux behavior), or the interface may
       not be implemented on Linux.

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 .

IEEE/The Open Group		     2003			  <utmpx.h>(P)
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