100 lines
2.9 KiB
C
100 lines
2.9 KiB
C
/* Copyright (C) 1996, 1997, 1999, 2000 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, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#include <errno.h>
|
|
#include <bits/libc-lock.h>
|
|
#include <stdlib.h>
|
|
|
|
#include "nsswitch.h"
|
|
|
|
/*******************************************************************\
|
|
|* Here we assume several symbols to be defined: *|
|
|
|* *|
|
|
|* LOOKUP_TYPE - the return type of the function *|
|
|
|* *|
|
|
|* GETFUNC_NAME - name of the non-reentrant getXXXent function *|
|
|
|* *|
|
|
|* BUFLEN - size of static buffer *|
|
|
|* *|
|
|
|* Optionally the following vars can be defined: *|
|
|
|* *|
|
|
|* NEED_H_ERRNO - an extra parameter will be passed to point to *|
|
|
|* the global `h_errno' variable. *|
|
|
|* *|
|
|
\*******************************************************************/
|
|
|
|
/* To make the real sources a bit prettier. */
|
|
#define REENTRANT_GETNAME APPEND_R (GETFUNC_NAME)
|
|
#define APPEND_R(name) APPEND_R1 (name)
|
|
#define APPEND_R1(name) name##_r
|
|
#define INTERNAL(name) INTERNAL1 (name)
|
|
#define INTERNAL1(name) __##name
|
|
|
|
/* Sometimes we need to store error codes in the `h_errno' variable. */
|
|
#ifdef NEED_H_ERRNO
|
|
# define H_ERRNO_PARM , int *h_errnop
|
|
# define H_ERRNO_VAR &h_errno
|
|
#else
|
|
# define H_ERRNO_PARM
|
|
# define H_ERRNO_VAR NULL
|
|
#endif
|
|
|
|
/* Prototype of the reentrant version. */
|
|
extern int INTERNAL (REENTRANT_GETNAME) (LOOKUP_TYPE *resbuf, char *buffer,
|
|
size_t buflen, LOOKUP_TYPE **result
|
|
H_ERRNO_PARM);
|
|
|
|
/* We need to protect the dynamic buffer handling. */
|
|
__libc_lock_define_initialized (static, lock);
|
|
|
|
/* This points to the static buffer used. */
|
|
static char *buffer;
|
|
|
|
|
|
LOOKUP_TYPE *
|
|
GETFUNC_NAME (void)
|
|
{
|
|
static size_t buffer_size;
|
|
static LOOKUP_TYPE resbuf;
|
|
LOOKUP_TYPE *result;
|
|
int save;
|
|
|
|
/* Get lock. */
|
|
__libc_lock_lock (lock);
|
|
|
|
result = (LOOKUP_TYPE *)
|
|
__nss_getent ((getent_r_function) INTERNAL (REENTRANT_GETNAME),
|
|
(void **) &resbuf, &buffer, BUFLEN, &buffer_size,
|
|
H_ERRNO_VAR);
|
|
|
|
save = errno;
|
|
__libc_lock_unlock (lock);
|
|
__set_errno (save);
|
|
return result;
|
|
}
|
|
|
|
|
|
/* Free all resources if necessary. */
|
|
static void __attribute__ ((unused))
|
|
free_mem (void)
|
|
{
|
|
free (buffer);
|
|
}
|
|
|
|
text_set_element (__libc_subfreeres, free_mem);
|