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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [newlib/] [libc/] [sys/] [linux/] [net/] [getXXent_r.c] - Blame information for rev 207

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1 207 jeremybenn
/* Copyright (C) 1996,97,98,99,2000,2002,2004 Free Software Foundation, Inc.
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   This file is part of the GNU C Library.
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   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
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   The GNU C Library is free software; you can redistribute it and/or
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   modify it under the terms of the GNU Lesser General Public
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   License as published by the Free Software Foundation; either
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   version 2.1 of the License, or (at your option) any later version.
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   The GNU C Library is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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   Lesser General Public License for more details.
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   You should have received a copy of the GNU Lesser General Public
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   License along with the GNU C Library; if not, write to the Free
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   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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   02111-1307 USA.  */
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#include <errno.h>
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#define _IO_MTSAFE_IO
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#include <bits/libc-lock.h>
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#include "nsswitch.h"
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/*******************************************************************\
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|* Here we assume several symbols to be defined:                   *|
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|*                                                                 *|
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|* LOOKUP_TYPE   - the return type of the function                 *|
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|*                                                                 *|
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|* SETFUNC_NAME  - name of the non-reentrant setXXXent function    *|
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|*                                                                 *|
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|* GETFUNC_NAME  - name of the non-reentrant getXXXent function    *|
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|*                                                                 *|
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|* ENDFUNC_NAME  - name of the non-reentrant endXXXent function    *|
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|*                                                                 *|
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|* DATABASE_NAME - name of the database the function accesses      *|
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|*                 (e.g., host, services, ...)                     *|
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|*                                                                 *|
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|* Optionally the following vars can be defined:                   *|
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|*                                                                 *|
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|* STAYOPEN      - variable declaration for setXXXent function     *|
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|*                                                                 *|
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|* STAYOPEN_VAR  - variable name for setXXXent function            *|
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|*                                                                 *|
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|* NEED_H_ERRNO  - an extra parameter will be passed to point to   *|
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|*                 the global `h_errno' variable.                  *|
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|*                                                                 *|
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\*******************************************************************/
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/* To make the real sources a bit prettier.  */
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#define REENTRANT_GETNAME APPEND_R (GETFUNC_NAME)
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#define APPEND_R(Name) CONCAT2_2 (Name, _r)
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#define INTERNAL(Name) CONCAT2_2 (__, Name)
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#define CONCAT2_1(Pre, Post) CONCAT2_2 (Pre, Post)
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#define CONCAT2_2(Pre, Post) Pre##Post
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#define NEW(name) NEW1 (name)
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#define NEW1(name) __new_##name
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#define SETFUNC_NAME_STRING STRINGIZE (SETFUNC_NAME)
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#define GETFUNC_NAME_STRING STRINGIZE (REENTRANT_GETNAME)
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#define ENDFUNC_NAME_STRING STRINGIZE (ENDFUNC_NAME)
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#define DATABASE_NAME_STRING STRINGIZE (DATABASE_NAME)
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#define STRINGIZE(Name) STRINGIZE1 (Name)
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#define STRINGIZE1(Name) #Name
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#ifndef DB_LOOKUP_FCT
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# define DB_LOOKUP_FCT CONCAT3_1 (__nss_, DATABASE_NAME, _lookup)
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# define CONCAT3_1(Pre, Name, Post) CONCAT3_2 (Pre, Name, Post)
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# define CONCAT3_2(Pre, Name, Post) Pre##Name##Post
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#endif
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/* Sometimes we need to store error codes in the `h_errno' variable.  */
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#ifdef NEED_H_ERRNO
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# define H_ERRNO_PARM , int *h_errnop
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# define H_ERRNO_VAR , &h_errno
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# define H_ERRNO_VAR_P &h_errno
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#else
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# define H_ERRNO_PARM
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# define H_ERRNO_VAR
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# define H_ERRNO_VAR_P NULL
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#endif
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/* Some databases take the `stayopen' flag.  */
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#ifdef STAYOPEN
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# define STAYOPEN_TMP CONCAT2_1 (STAYOPEN, _tmp)
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# define STAYOPEN_TMPVAR &CONCAT2_1 (STAYOPEN_VAR, _tmp)
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#else
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# define STAYOPEN void
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# define STAYOPEN_VAR 0
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# define STAYOPEN_TMPVAR NULL
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#endif
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#ifndef NEED__RES
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# define NEED__RES 0
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#endif
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/* This handle for the NSS data base is shared between all
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   set/get/endXXXent functions.  */
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static service_user *nip;
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/* Remember the last service used since the last call to  `endXXent'.  */
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static service_user *last_nip;
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/* Remember the first service_entry, it's always the same.  */
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static service_user *startp;
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#ifdef STAYOPEN_TMP
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/* We need to remember the last `stayopen' flag given by the user
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   since the `setent' function is only called for the first available
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   service.  */
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static STAYOPEN_TMP;
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#endif
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/* Protect above variable against multiple uses at the same time.  */
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__libc_lock_define_initialized (static, lock)
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/* The lookup function for the first entry of this service.  */
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extern int DB_LOOKUP_FCT (service_user **nip, const char *name, void **fctp)
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     internal_function;
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libc_hidden_proto (DB_LOOKUP_FCT)
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void
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SETFUNC_NAME (STAYOPEN)
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{
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  int save;
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  __libc_lock_lock (lock);
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  __nss_setent (SETFUNC_NAME_STRING, DB_LOOKUP_FCT, &nip, &startp,
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                &last_nip, STAYOPEN_VAR, STAYOPEN_TMPVAR, NEED__RES);
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  save = errno;
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  __libc_lock_unlock (lock);
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  __set_errno (save);
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}
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void
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ENDFUNC_NAME (void)
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{
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  int save;
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  /* If the service has not been used before do not do anything.  */
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  if (startp != NULL)
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    {
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      __libc_lock_lock (lock);
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      __nss_endent (ENDFUNC_NAME_STRING, DB_LOOKUP_FCT, &nip, &startp,
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                    &last_nip, NEED__RES);
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      save = errno;
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      __libc_lock_unlock (lock);
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      __set_errno (save);
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    }
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}
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int
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INTERNAL (REENTRANT_GETNAME) (LOOKUP_TYPE *resbuf, char *buffer, size_t buflen,
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                              LOOKUP_TYPE **result H_ERRNO_PARM)
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{
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  int status;
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  int save;
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  __libc_lock_lock (lock);
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  status = __nss_getent_r (GETFUNC_NAME_STRING, SETFUNC_NAME_STRING,
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                           DB_LOOKUP_FCT, &nip, &startp, &last_nip,
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                           STAYOPEN_TMPVAR, NEED__RES, resbuf, buffer,
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                           buflen, (void **) result, H_ERRNO_VAR_P);
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  save = errno;
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  __libc_lock_unlock (lock);
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  __set_errno (save);
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  return status;
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}
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#include <shlib-compat.h>
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#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1_2)
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#define OLD(name) OLD1 (name)
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#define OLD1(name) __old_##name
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int
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attribute_compat_text_section
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OLD (REENTRANT_GETNAME) (LOOKUP_TYPE *resbuf, char *buffer, size_t buflen,
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                         LOOKUP_TYPE **result H_ERRNO_PARM)
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{
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  int ret = INTERNAL (REENTRANT_GETNAME) (resbuf, buffer, buflen,
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                                          result H_ERRNO_VAR);
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  if (ret != 0)
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    ret = -1;
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  return ret;
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}
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#define do_symbol_version(real, name, version) \
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  compat_symbol (libc, real, name, version)
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do_symbol_version (OLD (REENTRANT_GETNAME), REENTRANT_GETNAME, GLIBC_2_0);
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#endif
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/* As INTERNAL (REENTRANT_GETNAME) may be hidden, we need an alias
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   in between so that the REENTRANT_GETNAME@@GLIBC_2.1.2 is not
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   hidden too.  */
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strong_alias (INTERNAL (REENTRANT_GETNAME), NEW (REENTRANT_GETNAME));
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#define do_default_symbol_version(real, name, version) \
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  versioned_symbol (libc, real, name, version)
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do_default_symbol_version (NEW (REENTRANT_GETNAME),
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                           REENTRANT_GETNAME, GLIBC_2_1_2);
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static_link_warning (SETFUNC_NAME)
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static_link_warning (ENDFUNC_NAME)
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static_link_warning (REENTRANT_GETNAME)

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