94 lines
2.6 KiB
C
94 lines
2.6 KiB
C
/*
|
|
FUNCTION
|
|
<<getenv>>---look up environment variable
|
|
|
|
INDEX
|
|
getenv
|
|
INDEX
|
|
environ
|
|
|
|
ANSI_SYNOPSIS
|
|
#include <stdlib.h>
|
|
char *getenv(const char *<[name]>);
|
|
|
|
TRAD_SYNOPSIS
|
|
#include <stdlib.h>
|
|
char *getenv(<[name]>)
|
|
char *<[name]>;
|
|
|
|
DESCRIPTION
|
|
<<getenv>> 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>> 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>> is ANSI, but the rules for properly forming names of environment
|
|
variables vary from one system to another.
|
|
|
|
<<getenv>> requires a global pointer <<environ>>.
|
|
*/
|
|
|
|
/*
|
|
* Copyright (c) 1987, 2000 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.
|
|
*/
|
|
|
|
#ifndef _REENT_ONLY
|
|
|
|
#include <stdlib.h>
|
|
#include <stddef.h>
|
|
#include <string.h>
|
|
|
|
/*
|
|
* _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).
|
|
* Explicitly removes '=' in argument name.
|
|
*
|
|
* This routine *should* be a static; don't use it.
|
|
*/
|
|
|
|
char *
|
|
_DEFUN (_findenv, (name, offset),
|
|
register _CONST char *name _AND
|
|
int *offset)
|
|
{
|
|
return NULL; //_findenv_r (_REENT, name, offset);
|
|
}
|
|
|
|
/*
|
|
* getenv --
|
|
* Returns ptr to value associated with name, if any, else NULL.
|
|
*/
|
|
|
|
char *
|
|
_DEFUN (getenv, (name),
|
|
_CONST char *name)
|
|
{
|
|
int offset;
|
|
|
|
return NULL; //_findenv_r (_REENT, name, &offset);
|
|
}
|
|
|
|
#endif /* !_REENT_ONLY */
|