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.\" @(#)$RCSfile: Cns_getgrpbygid.man,v $ $Revision: 1.1 $ $Date: 2005/10/19 11:30:57 $ CERN IT-GD/SC Jean-Philippe Baud
.\" Copyright (C) 2005 by CERN/IT/GD/SC
.\" All rights reserved
.\"
.TH CNS_GETGRPBYGID 3 "$Date: 2005/10/19 11:30:57 $" CASTOR "Cns Library Functions"
.SH NAME
Cns_getgrpbygid \- get group name associated with a given virtual gid
.SH SYNOPSIS
.B #include <sys/types.h>
.br
\fB#include "Cns_api.h"\fR
.sp
.BI "int Cns_getgrpbygid (gid_t " gid ,
.BI "char *" groupname )
.SH DESCRIPTION
.B Cns_getgrpbygid
gets the group name associated with a given virtual gid.
.TP
.I gid
specifies the Virtual Group Id.
.TP
.I groupname
points at a buffer to receive the associated group name.
The buffer must be at least 256 characters long.
.SH RETURN VALUE
This routine returns 0 if the operation was successful or -1 if the operation
failed. In the latter case,
.B serrno
is set appropriately.
.SH ERRORS
.TP 1.3i
.B EFAULT
.I groupname
is a NULL pointer.
.TP
.B EINVAL
This gid does not exist in the internal mapping table.
.TP
.B SENOSHOST
Host unknown.
.TP
.B SENOSSERV
Service unknown.
.TP
.B SECOMERR
Communication error.
.TP
.B ENSNACT
Name server is not running or is being shutdown.
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