146 lines
4.2 KiB
Groff
146 lines
4.2 KiB
Groff
.\" $NetBSD: pwcache.3,v 1.9 1998/07/28 17:09:10 mycroft Exp $
|
|
.\"
|
|
.\" Copyright (c) 1989, 1991, 1993
|
|
.\" The Regents of the University of California. All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" 3. All advertising materials mentioning features or use of this software
|
|
.\" must display the following acknowledgement:
|
|
.\" This product includes software developed by the University of
|
|
.\" California, Berkeley and its contributors.
|
|
.\" 4. Neither the name of the University nor the names of its contributors
|
|
.\" may be used to endorse or promote products derived from this software
|
|
.\" without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" @(#)pwcache.3 8.1 (Berkeley) 6/9/93
|
|
.\"
|
|
.Dd July 28, 1998
|
|
.Dt PWCACHE 3
|
|
.Os
|
|
.Sh NAME
|
|
.Nm pwcache ,
|
|
.Nm user_from_uid ,
|
|
.Nm group_from_gid
|
|
.Nd cache password and group entries
|
|
.Sh LIBRARY
|
|
.Lb libc
|
|
.Sh SYNOPSIS
|
|
.Fd #include <pwd.h>
|
|
.Ft const char *
|
|
.Fn user_from_uid "uid_t uid" "int nouser"
|
|
.Ft int
|
|
.Fn uid_from_user "const char *name" "uid_t *uid"
|
|
.Fd #include <grp.h>
|
|
.Ft const char *
|
|
.Fn group_from_gid "gid_t gid" "int nogroup"
|
|
.Ft int
|
|
.Fn gid_from_group "const char *name" "gid_t *gid"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn user_from_uid
|
|
function returns the user name associated with the argument
|
|
.Fa uid .
|
|
The user name is cached so that multiple calls with the same
|
|
.Fa uid
|
|
do not require additional calls to
|
|
.Xr getpwuid 3 .
|
|
If there is no user associated with the
|
|
.Fa uid ,
|
|
a pointer is returned
|
|
to a string representation of the
|
|
.Fa uid ,
|
|
unless the argument
|
|
.Fa nouser
|
|
is non-zero, in which case a
|
|
.Dv NULL
|
|
pointer is returned.
|
|
.Pp
|
|
The
|
|
.Fn group_from_gid
|
|
function returns the group name associated with the argument
|
|
.Fa gid .
|
|
The group name is cached so that multiple calls with the same
|
|
.Fa gid
|
|
do not require additional calls to
|
|
.Xr getgrgid 3 .
|
|
If there is no group associated with the
|
|
.Fa gid ,
|
|
a pointer is returned
|
|
to a string representation of the
|
|
.Fa gid ,
|
|
unless the argument
|
|
.Fa nogroup
|
|
is non-zero, in which case a
|
|
.Dv NULL
|
|
pointer is returned.
|
|
.Pp
|
|
The
|
|
.Fn uid_from_user
|
|
function returns the uid associated with the argument
|
|
.Fa name .
|
|
The uid is cached so that multiple calls with the same
|
|
.Fa name
|
|
do not require additional calls to
|
|
.Xr getpwnam 3 .
|
|
If there is no uid associated with the
|
|
.Fa name ,
|
|
the
|
|
.Fn uid_from_user
|
|
function returns -1; otherwise it stores the uid at the location pointed to by
|
|
.Fa uid
|
|
and returns 0.
|
|
.Pp
|
|
The
|
|
.Fn gid_from_group
|
|
function returns the gid associated with the argument
|
|
.Fa name .
|
|
The gid is cached so that multiple calls with the same
|
|
.Fa name
|
|
do not require additional calls to
|
|
.Xr getgrnam 3 .
|
|
If there is no gid associated with the
|
|
.Fa name ,
|
|
the
|
|
.Fn gid_from_group
|
|
function returns -1; otherwise it stores the gid at the location pointed to by
|
|
.Fa gid
|
|
and returns 0.
|
|
.Sh SEE ALSO
|
|
.Xr getgrgid 3 ,
|
|
.Xr getgrnam 3 ,
|
|
.Xr getpwnam 3 ,
|
|
.Xr getpwuid 3
|
|
.Sh HISTORY
|
|
The
|
|
.Fn user_from_uid
|
|
and
|
|
.Fn group_from_gid
|
|
functions first appeared in
|
|
.Bx 4.4 .
|
|
.Pp
|
|
The
|
|
.Fn uid_from_user
|
|
and
|
|
.Fn gid_from_group
|
|
functions first appeared in
|
|
.Nx 1.4 .
|