NAME
endutxent
,
getutxent
, getutxid
,
getutxline
, pututxline
,
setutxent
—
user accounting database
functions
LIBRARY
library “libc”
SYNOPSIS
#include
<utmpx.h>
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);
DESCRIPTION
These functions provide access to the utmpx(5) user accounting database.getutxent
()
reads the next entry from the database; if the database was not yet open, it
also opens it.
setutxent
()
resets the database, so that the next getutxent
()
call will get the first entry.
endutxent
()
closes the database.
getutxid
()
returns the next entry of the type specified in its argument's
ut_type field, or NULL
if none
is found.
getutxline
()
returns the next LOGIN_PROCESS
or
USER_PROCESS
entry which has the same name as
specified in the ut_line field, or
NULL
if no match is found.
pututxline
()
adds the argument
utmpx(5) entry line to the accounting database, replacing a previous
entry for the same user if it exists.
The utmpx structure
The utmpx
structure has the following
definition:
struct utmpx { char ut_name[_UTX_USERSIZE]; /* login name */ char ut_id[_UTX_IDSIZE]; /* inittab id */ char ut_line[_UTX_LINESIZE]; /* tty name */ char ut_host[_UTX_HOSTSIZE]; /* host name */ uint16_t ut_session; /* session id used for windowing */ uint16_t ut_type; /* type of this entry */ pid_t ut_pid; /* process id creating the entry */ struct { uint16_t e_termination; /* process termination signal */ uint16_t e_exit; /* process exit status */ } ut_exit; struct sockaddr_storage ut_ss; /* address where entry was made from */ struct timeval ut_tv; /* time entry was created */ uint32_t ut_pad[10]; /* reserved for future use */ };
Valid entries for ut_type are:
BOOT_TIME
- Time of a system boot.
DEAD_PROCESS
- A session leader exited.
EMPTY
- No valid user accounting information.
INIT_PROCESS
- A process spawned by init(8).
LOGIN_PROCESS
- The session leader of a logged-in user.
NEW_TIME
- Time after system clock change.
OLD_TIME
- Time before system clock change.
RUN_LVL
- Run level. Provided for compatibility, not used on NetBSD.
USER_PROCESS
- A user process.
RETURN VALUES
getutxent
() returns the next entry, or
NULL
on failure (end of database or problems reading
from the database). getutxid
() and
getutxline
() return the matching structure on
success, or NULL
if no match was found.
pututxline
() returns the structure that was
successfully written, or NULL
.
SEE ALSO
STANDARDS
The endutxent
(),
getutxent
(), getutxid
(),
getutxline
(), pututxline
(),
setutxent
() all conform to IEEE Std
1003.1-2001 (“POSIX.1”) (XSI extension), and previously
to X/Open Portability Guide Issue 4,
Version 2 (“XPG4.2”). The fields
ut_user, ut_id,
ut_line, ut_pid,
ut_type, and ut_tv conform to
IEEE Std 1003.1-2001 (“POSIX.1”) (XSI
extension), and previously to X/Open Portability Guide
Issue 4, Version 2 (“XPG4.2”).