/*

   aliases.c - NSS lookup functions for aliases database

   Copyright (C) 2006 West Consulting

   Copyright (C) 2006-2015 Arthur de Jong

   This 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.

   This 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 this library; if not, write to the Free Software

   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

   02110-1301 USA

*/

#include "config.h"

#include <string.h>

#include <errno.h>

#include "prototypes.h"

#include "common.h"

/* read an alias entry from the stream */

static nss_status_t read_aliasent(TFILE *fp, struct aliasent *result,

                                  char *buffer, size_t buflen, int *errnop)

{

  int32_t tmpint32, tmp2int32, tmp3int32;

  size_t bufptr = 0;

  memset(result, 0, sizeof(struct aliasent));

  /* read the name of the alias */

  READ_BUF_STRING(fp, result->alias_name);

  /* read the members */

  READ_BUF_STRINGLIST(fp, result->alias_members);

  /* tmp3int32 holds the number of entries read */

  result->alias_members_len = tmp3int32;

  /* fill in remaining gaps in struct */

  result->alias_local = 0;

  /* we're done */

  return NSS_STATUS_SUCCESS;

}

/* get an alias entry by name */

nss_status_t NSS_NAME(getaliasbyname_r)(const char *name,

                                        struct aliasent *result,

                                        char *buffer, size_t buflen,

                                        int *errnop)

{

  NSS_GETONE(NSLCD_ACTION_ALIAS_BYNAME,

             WRITE_STRING(fp, name),

             read_aliasent(fp, result, buffer, buflen, errnop));

}

/* thread-local file pointer to an ongoing request */

static TLS TFILE *aliasentfp;

/* start a request to read all aliases */

nss_status_t NSS_NAME(setaliasent)(void)

{

  NSS_SETENT(aliasentfp);

}

/* read a single alias entry from the stream */

nss_status_t NSS_NAME(getaliasent_r)(struct aliasent *result,

                                     char *buffer, size_t buflen, int *errnop)

{

  NSS_GETENT(aliasentfp, NSLCD_ACTION_ALIAS_ALL,

             read_aliasent(aliasentfp, result, buffer, buflen, errnop));

}

/* close the stream opened with setaliasent() above */

nss_status_t NSS_NAME(endaliasent)(void)

{

  NSS_ENDENT(aliasentfp);

}