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.
utmpx.h — user accounting database definitions
header shall define the utmpx
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.
header shall define the pid_t
, as described in <sys/types.h>
header shall define the timeval
described in <sys/time.h>
Inclusion of the <utmpx.h>
header may also make visible all symbols
header shall define the following symbolic constants
as possible values for the ut_type
member of the utmpx
- No valid user accounting information.
- Identifies time of system boot.
- Identifies time when system clock changed.
- Identifies time after system clock changed.
- Identifies a process.
- Identifies a process spawned by the init process.
- Identifies the session leader of a logged-in user.
- 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.
The following sections are informative.
struct utmpx *getutxent(void);
struct utmpx *getutxid(const struct utmpx *);
struct utmpx *getutxline(const struct utmpx *);
struct utmpx *pututxline(const struct utmpx *);
The System Interfaces volume of POSIX.1‐2008, endutxent()
Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1, 2013 Edition, Standard for Information Technology -- Portable
Operating System Interface (POSIX), The Open Group Base Specifications Issue
7, Copyright (C) 2013 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. (This is POSIX.1-2008 with the 2013
Technical Corrigendum 1 applied.) 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.unix.org/online.html .
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