mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-30 14:31:14 +00:00
d60d215c57
1999-05-14 Ulrich Drepper <drepper@cygnus.com> * nss/getXXbyYY.c: Add free_mem function which disposes all statically allocated memory when debugging. * nss/getXXent.c: Likewise. * nss/nsswitch.c: Likewise.
129 lines
3.6 KiB
C
129 lines
3.6 KiB
C
/* Copyright (C) 1996, 1997, 1999 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 Library General Public License as
|
|
published by the Free Software Foundation; either version 2 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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. 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
|
|
#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);
|
|
|
|
if (buffer == NULL)
|
|
{
|
|
buffer_size = BUFLEN;
|
|
buffer = malloc (buffer_size);
|
|
}
|
|
|
|
while (buffer != NULL
|
|
&& INTERNAL (REENTRANT_GETNAME) (&resbuf, buffer, buffer_size, &result
|
|
H_ERRNO_VAR) != 0
|
|
#ifdef NEED_H_ERRNO
|
|
&& h_errno == NETDB_INTERNAL
|
|
#endif
|
|
&& errno == ERANGE)
|
|
{
|
|
char *new_buf;
|
|
buffer_size += BUFLEN;
|
|
new_buf = realloc (buffer, buffer_size);
|
|
if (new_buf == NULL)
|
|
{
|
|
/* We are out of memory. Free the current buffer so that the
|
|
process gets a chance for a normal termination. */
|
|
save = errno;
|
|
free (buffer);
|
|
__set_errno (save);
|
|
}
|
|
buffer = new_buf;
|
|
}
|
|
|
|
if (buffer == NULL)
|
|
result = NULL;
|
|
|
|
/* Release lock. Preserve error value. */
|
|
save = errno;
|
|
__libc_lock_unlock (lock);
|
|
__set_errno (save);
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
/* Free all resources if necessary. */
|
|
static void __attribute__ ((unused))
|
|
free_mem (void)
|
|
{
|
|
if (buffer != NULL)
|
|
free (buffer);
|
|
}
|
|
|
|
text_set_element (__libc_subfreeres, free_mem);
|