Libc-763.11.tar.gz

[apple/libc.git] / gen / getlastlogx.3.orig

.\"	$NetBSD: getlastlogx.3,v 1.2 2008/04/30 13:10:50 martin Exp $
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.\" Copyright (c) 2003 The NetBSD Foundation, Inc.
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.\" This code is derived from software contributed to The NetBSD Foundation
.\" by Thomas Klausner.
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.Dd August 26, 2003
.Dt GETLASTLOGX 3
.Os
.Sh NAME
.Nm getlastlogx ,
.Nm getutmp ,
.Nm getutmpx ,
.Nm updlastlogx ,
.Nm updwtmpx ,
.Nm utmpxname
.Nd user accounting database functions
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In utmpx.h
.Ft struct lastlogx *
.Fn getlastlogx "const char *fname" "uid_t uid" "struct lastlogx *ll"
.Ft void
.Fn getutmp "const struct utmpx *ux" "struct utmp *u"
.Ft void
.Fn getutmpx "const struct utmp *u" "struct utmpx *ux"
.Ft int
.Fn updlastlogx "const char *fname" "uid_t uid" "struct lastlogx *ll"
.Ft int
.Fn updwtmpx "const char *file" "const struct utmpx *utx"
.Ft int
.Fn utmpxname "const char *fname"
.Sh DESCRIPTION
The
.Fn getlastlogx
function looks up the entry for the user with user id
.Fa uid
in the
.Xr lastlogx 5
file given by
.Fa fname
and returns it in
.Fa \&ll .
If the provided
.Fa \&ll
is
.Dv NULL ,
the necessary space will be allocated by
.Fn getlastlogx
and should be
.Fn free Ns d
by the caller.
.Pp
The
.Fn getutmp
function fills out the entries in the struct utmp
.Fa u
with the data provided in the struct utmpx
.Fa ux .
.Fn getutmpx
does the opposite, filling out the entries in the struct utmpx
.Fa ux
with the data provided in the struct utmp
.Fa u ,
and initializing all the unknown fields to 0.
The sole exception is the
.Fa ut_type
field, which will be initialized to
.Dv USER_PROCESS .
.Pp
The
.Fn updlastlogx
function tries to update the information for the user with the user id
.Fa uid
in the
.Xr lastlogx 5
file given by
.Fa fname
with the data supplied in
.Fa \&ll .
A
.Ft struct lastlogx
is defined like this:
.Bd -literal
struct lastlogx {
        struct timeval ll_tv;           /* time entry was created */
        char ll_line[_UTX_LINESIZE];    /* tty name */
        char ll_host[_UTX_HOSTSIZE];    /* host name */
        struct sockaddr_storage ll_ss;  /* address where entry was made from */
};
.Ed
All the fields should be filled out by the caller.
.Pp
The
.Fn updwtmpx
function updates the
.Xr wtmpx 5
file
.Fa file
with the
.Xr utmpx 5
entry
.Fa utx .
.Pp
The
.Fn utmpxname
function sets the default
.Xr utmpx 5
database file name to
.Fa fname .
.Sh RETURN VALUES
.Fn getlastlogx
returns the found entry on success, or
.Dv NULL
if it could not open the database, could not find an entry matching
.Fa uid
in there, or could not allocate the necessary space (in case
.Fa \&ll
was
.Dv NULL ) .
.Pp
.Fn utmpxname
returns 1 on success, or 0 if the supplied file name was too long or
did not end with
.Sq x .
.Pp
.Fn updlastlogx
and
.Fn updwtmpx
return 0 on success, or \-1 in case the database or file respectively
could not be opened or the data not written into it.
.Sh SEE ALSO
.Xr endutxent 3 ,
.Xr loginx 3 ,
.Xr utmpx 5
.Sh HISTORY
The functions
.Fn getutmp ,
.Fn getutmpx ,
.Fn updwtmpx ,
and
.Fn utmpxname
first appeared in
.Tn Solaris .
.Nm getlastlogx
and
.Nm updlastlogx
first appeared in
.Nx 2.0 .