gdb/environ.h

   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) */