| 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, |
| 17 | Boston, MA 02111-1307, USA. */ |
| 18 | |
| 19 | #if !defined (ENVIRON_H) |
| 20 | #define ENVIRON_H 1 |
| 21 | |
| 22 | /* We manipulate environments represented as these structures. */ |
| 23 | |
| 24 | struct environ |
| 25 | { |
| 26 | /* Number of usable slots allocated in VECTOR. |
| 27 | VECTOR always has one slot not counted here, |
| 28 | to hold the terminating zero. */ |
| 29 | int allocated; |
| 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. */ |
| 34 | char **vector; |
| 35 | }; |
| 36 | |
| 37 | extern struct environ * |
| 38 | make_environ PARAMS ((void)); |
| 39 | |
| 40 | extern void |
| 41 | free_environ PARAMS ((struct environ *)); |
| 42 | |
| 43 | extern void |
| 44 | init_environ PARAMS ((struct environ *)); |
| 45 | |
| 46 | extern char * |
| 47 | get_in_environ PARAMS ((const struct environ *, const char *)); |
| 48 | |
| 49 | extern void |
| 50 | set_in_environ PARAMS ((struct environ *, const char *, |
| 51 | const char *)); |
| 52 | |
| 53 | extern void |
| 54 | unset_in_environ PARAMS ((struct environ *, char *)); |
| 55 | |
| 56 | extern char ** |
| 57 | environ_vector PARAMS ((struct environ *)); |
| 58 | |
| 59 | #endif /* defined (ENVIRON_H) */ |