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90 lines
3.1 KiB
Groff
90 lines
3.1 KiB
Groff
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.\" Copyright (c) 1989, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)pwcache.3 8.1 (Berkeley) 6/9/93
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.\"
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.TH PWCACHE 3 "25 February 1997" GNO "Library Routines"
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.SH NAME
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.BR pwcache
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\- cache password and group entries
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.SH SYNOPSIS
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char *\fBuser_from_uid\fR (uid_t \fIuid\fR, int \fInouser\fR);
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.br
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char *\fBgroup_from_gid\fR (gid_t \fIgid\fR, int \fInogroup\fR);
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.SH DESCRIPTION
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.LP
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The
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.BR user_from_uid
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function returns the user name associated with the argument
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.IR uid .
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The user name is cached so that multiple calls with the same
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.I uid
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do not require additional calls to
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.BR getpwuid (3).
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If there is no user associated with the
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.IR uid ,
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a pointer is returned
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to a string representation of the
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.IR uid ,
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unless the argument
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.I nouser
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is non-zero, in which case a
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.BR NULL
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pointer is returned.
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.LP
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The
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.BR group_from_gid
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function returns the group name associated with the argument
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.IR gid .
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The group name is cached so that multiple calls with the same
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.I gid
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do not require additional calls to
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.BR getgrgid (3).
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If there is no group associated with the
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.IR gid ,
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a pointer is returned
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to a string representation of the
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.IR gid ,
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unless the argument
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.I nogroup
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is non-zero, in which case a
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.BR NULL
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pointer is returned.
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.SH SEE ALSO
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.BR getgrgid (3),
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.BR getpwuid (3)
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.SH HISTORY
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The
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.BR user_from_uid
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and
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.BR group_from_gid
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functions first appeared in 4.4BSD.
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