/*

   solnss.h - common functions for NSS lookups on Solaris

   Copyright (C) 2012 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

*/

#ifndef NSS__SOLNSS_H

#define NSS__SOLNSS_H 1

#ifdef NSS_FLAVOUR_SOLARIS

/* extra definitions we need (Solaris NSS functions don't pass errno)

   also clear the output values */

#ifdef HAVE_STRUCT_NSS_XBYY_ARGS_RETURNLEN

#define NSS_EXTRA_DEFS                                                      \

  int *errnop = &(errno);                                                   \

  NSS_ARGS(args)->returnval = NULL;                                         \

  NSS_ARGS(args)->returnlen = 0;                                            \

  NSS_ARGS(args)->erange = 0;                                               \

  NSS_ARGS(args)->h_errno = 0;

#else /* not HAVE_STRUCT_NSS_XBYY_ARGS_RETURNLEN */

#define NSS_EXTRA_DEFS                                                      \

  int *errnop = &(errno);                                                   \

  NSS_ARGS(args)->returnval = NULL;                                         \

  NSS_ARGS(args)->erange = 0;                                               \

  NSS_ARGS(args)->h_errno = 0;

#endif /* not HAVE_STRUCT_NSS_XBYY_ARGS_RETURNLEN */

/* check validity of passed buffer (Solaris flavour) */

#define NSS_BUFCHECK                                                        \

  if ((NSS_ARGS(args)->buf.buffer == NULL) ||                               \

      (NSS_ARGS(args)->buf.buflen <= 0))                                    \

  {                                                                         \

    NSS_ARGS(args)->erange = 1;                                             \

    return NSS_STATUS_TRYAGAIN;                                             \

  }

/* wrapper function body for read_xxxent that does the buffer handling,

   return code handling and conversion to strings for nscd

   (also see READ_RESULT_STRING below) */

#define READ_RESULT(ent, extra...)                                          \

  nss_status_t retv;                                                        \

  READ_RESULT_STRING(ent, ##extra)                                          \

  /* read the entry */                                                      \

  retv = read_##ent(fp, args->buf.result, args->buf.buffer,                 \

                    args->buf.buflen, ##extra);                             \

  if (retv != NSS_STATUS_SUCCESS)                                           \

    return retv;                                                            \

  args->returnval = args->buf.result;                                       \

  return NSS_STATUS_SUCCESS;

/* provide result handling for when libc (or nscd) expects the returned

   values to be in string format */

#ifdef HAVE_STRUCT_NSS_XBYY_ARGS_RETURNLEN

#define READ_RESULT_STRING(ent, extra...)                                   \

  struct ent result;                                                        \

  char *buffer;                                                             \

  /* try to return in string format if requested */                         \

  if (args->buf.result == NULL)                                             \

  {                                                                         \

    /* read the entry into a temporary buffer */                            \

    buffer = (char *)malloc(args->buf.buflen);                              \

    if (buffer == NULL)                                                     \

      return NSS_STATUS_UNAVAIL;                                            \

    retv = read_##ent(fp, &result, buffer, args->buf.buflen, ##extra);      \

    /* format to string */                                                  \

    if (retv == NSS_STATUS_SUCCESS)                                         \

      if (ent##2str(&result, args->buf.buffer, args->buf.buflen) == NULL)   \

      {                                                                     \

        args->erange = 1;                                                   \

        retv = NSS_NOTFOUND;                                                \

      }                                                                     \

    /* clean up and return result */                                        \

    free(buffer);                                                           \

    if (retv != NSS_STATUS_SUCCESS)                                         \

      return retv;                                                          \

    args->returnval = args->buf.buffer;                                     \

    args->returnlen = strlen(args->returnval);                              \

    return NSS_STATUS_SUCCESS;                                              \

  }

#else /* not HAVE_STRUCT_NSS_XBYY_ARGS_RETURNLEN */

#define READ_RESULT_STRING(ent, extra...) ;

#endif /* not HAVE_STRUCT_NSS_XBYY_ARGS_RETURNLEN */

/* this is the backend structure for Solaris */

struct nss_ldap_backend {

  nss_backend_op_t *ops;  /* function-pointer table */

  int n_ops;              /* number of function pointers */

  TFILE *fp;              /* file pointer for {set,get,end}ent() functions */

};

/* constructor for LDAP backends */

nss_backend_t *nss_ldap_constructor(nss_backend_op_t *ops, size_t sizeofops);

/* destructor for LDAP backends */

nss_status_t nss_ldap_destructor(nss_backend_t *be, void UNUSED(*args));

#endif /* NSS_FLAVOUR_SOLARIS */

#endif /* not NSS__COMMON_H */