1 /* Header for environment manipulation library.
2 Copyright 1989, 1992, 2000 Free Software Foundation, Inc.
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 2 of the License, or
7 (at your option) any later version.
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., 59 Temple Place - Suite 330,
17 Boston, MA 02111-1307, USA. */
19 #if !defined (ENVIRON_H)
22 /* We manipulate environments represented as these structures. */
26 /* Number of usable slots allocated in VECTOR.
27 VECTOR always has one slot not counted here,
28 to hold the terminating zero. */
30 /* A vector of slots, ALLOCATED + 1 of them.
31 The first few slots contain strings "VAR=VALUE"
32 and the next one contains zero.
33 Then come some unused slots. */
37 extern struct environ
*make_environ (void);
39 extern void free_environ (struct environ
*);
41 extern void init_environ (struct environ
*);
43 extern char *get_in_environ (const struct environ
*, const char *);
45 extern void set_in_environ (struct environ
*, const char *, const char *);
47 extern void unset_in_environ (struct environ
*, char *);
49 extern char **environ_vector (struct environ
*);
51 #endif /* defined (ENVIRON_H) */
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