The Open Group Base Specifications Issue 7, 2018 edition
IEEE Std 1003.1-2017 (Revision of IEEE Std 1003.1-2008)
Copyright © 2001-2018 IEEE and The Open Group

NAME

utmpx.h - user accounting database definitions

SYNOPSIS

[XSI] [Option Start] #include <utmpx.h> [Option End]

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 <utmpx.h> header shall define the pid_t type through typedef, as described in <sys/types.h>.

The <utmpx.h> header shall define the timeval structure as described in <sys/time.h>.

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

The <utmpx.h> header shall define the following symbolic constants 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>

XSH endutxent

CHANGE HISTORY

First released in Issue 4, Version 2.

End of informative text.

 

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