/* Copyright (C) 2009-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <errno.h>

#include <stdbool.h>

#include <stdio.h>

#include <gshadow.h>

#include <nss.h>

#define _S(x)	x ? x : ""

/* Write an entry to the given stream.

   This must know the format of the group file.  */

int

putsgent (const struct sgrp *g, FILE *stream)

{

  int errors = 0;

  if (g->sg_namp == NULL || !__nss_valid_field (g->sg_namp)

      || !__nss_valid_field (g->sg_passwd)

      || !__nss_valid_list_field (g->sg_adm)

      || !__nss_valid_list_field (g->sg_mem))

    {

      __set_errno (EINVAL);

      return -1;

    }

  _IO_flockfile (stream);

  if (fprintf (stream, "%s:%s:", g->sg_namp, _S (g->sg_passwd)) < 0)

    ++errors;

  bool first = true;

  char **sp = g->sg_adm;

  if (sp != NULL)

    while (*sp != NULL)

      {

	if (fprintf (stream, "%s%s", first ? "" : ",", *sp++) < 0)

	  {

	    ++errors;

	    break;

	  }

	first = false;

      }

  if (putc_unlocked (':', stream) == EOF)

    ++errors;

  first = true;

  sp = g->sg_mem;

  if (sp != NULL)

    while (*sp != NULL)

      {

	if (fprintf (stream, "%s%s", first ? "" : ",", *sp++) < 0)

	  {

	    ++errors;

	    break;

	  }

	first = false;

      }

  if (putc_unlocked ('\n', stream) == EOF)

    ++errors;

  _IO_funlockfile (stream);

  return errors ? -1 : 0;

}