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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 .