<utmpx.h>(0P)                                       POSIX Programmer's Manual                                      <utmpx.h>(0P)



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,  Copy-
       right (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.open-
       group.org/unix/online.html .



IEEE/The Open Group                                           2003                                                 <utmpx.h>(0P)