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c906108c SS |
1 | /* Header for environment manipulation library. |
2 | Copyright 1989, 1992 Free Software Foundation. | |
3 | ||
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. | |
8 | ||
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. | |
13 | ||
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, Boston, MA 02111-1307, USA. */ | |
17 | ||
18 | #if !defined (ENVIRON_H) | |
19 | #define ENVIRON_H 1 | |
20 | ||
21 | /* We manipulate environments represented as these structures. */ | |
22 | ||
23 | struct environ | |
24 | { | |
25 | /* Number of usable slots allocated in VECTOR. | |
26 | VECTOR always has one slot not counted here, | |
27 | to hold the terminating zero. */ | |
28 | int allocated; | |
29 | /* A vector of slots, ALLOCATED + 1 of them. | |
30 | The first few slots contain strings "VAR=VALUE" | |
31 | and the next one contains zero. | |
32 | Then come some unused slots. */ | |
33 | char **vector; | |
34 | }; | |
35 | ||
36 | extern struct environ * | |
37 | make_environ PARAMS ((void)); | |
38 | ||
39 | extern void | |
40 | free_environ PARAMS ((struct environ *)); | |
41 | ||
42 | extern void | |
43 | init_environ PARAMS ((struct environ *)); | |
44 | ||
45 | extern char * | |
46 | get_in_environ PARAMS ((const struct environ *, const char *)); | |
47 | ||
48 | extern void | |
49 | set_in_environ PARAMS ((struct environ *, const char *, | |
50 | const char *)); | |
51 | ||
52 | extern void | |
53 | unset_in_environ PARAMS ((struct environ *, char *)); | |
54 | ||
55 | extern char ** | |
56 | environ_vector PARAMS ((struct environ *)); | |
57 | ||
58 | #endif /* defined (ENVIRON_H) */ |