kolibrios-fun/contrib/sdk/sources/newlib/libc/stdlib/getenv_r.c
Sergey Semyonov (Serge) cabcfc4bb3 newlib: update
git-svn-id: svn://kolibrios.org@6099 a494cfbc-eb01-0410-851d-a64ba20cac60
2016-01-26 02:29:46 +00:00

106 lines
3.1 KiB
C

/*
FUNCTION
<<_getenv_r>>---look up environment variable
INDEX
_getenv_r
INDEX
environ
ANSI_SYNOPSIS
#include <stdlib.h>
char *_getenv_r(struct _reent *<[reent_ptr]>, const char *<[name]>);
TRAD_SYNOPSIS
#include <stdlib.h>
char *_getenv_r(<[reent_ptr]>, <[name]>)
struct _reent *<[reent_ptr]>;
char *<[name]>;
DESCRIPTION
<<_getenv_r>> searches the list of environment variable names and values
(using the global pointer ``<<char **environ>>'') for a variable whose
name matches the string at <[name]>. If a variable name matches,
<<_getenv_r>> returns a pointer to the associated value.
RETURNS
A pointer to the (string) value of the environment variable, or
<<NULL>> if there is no such environment variable.
PORTABILITY
<<_getenv_r>> is not ANSI; the rules for properly forming names of environment
variables vary from one system to another. This implementation does not
permit '=' to be in identifiers.
<<_getenv_r>> requires a global pointer <<environ>>.
*/
/* This file may have been modified by DJ Delorie (Jan 1991). If so,
** these modifications are Copyright (C) 1991 DJ Delorie.
*/
/*
* Copyright (c) 1987 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that: (1) source distributions retain this entire copyright
* notice and comment, and (2) distributions including binaries display
* the following acknowledgement: ``This product includes software
* developed by the University of California, Berkeley and its contributors''
* in the documentation or other materials provided with the distribution
* and in all advertising materials mentioning features or use of this
* software. Neither the name of the University nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#include <stdlib.h>
#include <stddef.h>
#include <string.h>
#include "envlock.h"
extern char **environ;
/* Only deal with a pointer to environ, to work around subtle bugs with shared
libraries and/or small data systems where the user declares his own
'environ'. */
static char ***p_environ = &environ;
/*
* _findenv --
* Returns pointer to value associated with name, if any, else NULL.
* Sets offset to be the offset of the name/value combination in the
* environmental array, for use by setenv(3) and unsetenv(3).
*
* This routine *should* be a static; don't use it.
*/
char *
_DEFUN (_findenv_r, (reent_ptr, name, offset),
struct _reent *reent_ptr _AND
register _CONST char *name _AND
int *offset)
{
return NULL;
}
/*
* _getenv_r --
* Returns ptr to value associated with name, if any, else NULL.
*/
char *
_DEFUN (_getenv_r, (reent_ptr, name),
struct _reent *reent_ptr _AND
_CONST char *name)
{
int offset;
return NULL;
// return _findenv_r (reent_ptr, name, &offset);
}