1 /* Header for environment manipulation library.
2 Copyright (C) 1989, Free Software Foundation.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 1, or (at your option)
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
18 /* We manipulate environments represented as these structures. */
22 /* Number of usable slots allocated in VECTOR.
23 VECTOR always has one slot not counted here,
24 to hold the terminating zero. */
26 /* A vector of slots, ALLOCATED + 1 of them.
27 The first few slots contain strings "VAR=VALUE"
28 and the next one contains zero.
29 Then come some unused slots. */
33 struct environ *make_environ ();
36 char *get_in_environ ();
37 void set_in_environ ();
38 void unset_in_environ ();
39 char **environ_vector ();