gdb/environ.h

   1 /* Header for environment manipulation library.
   2    Copyright (C) 1989, 1992, 2000, 2005, 2007, 2008
   3    Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  17
  18 #if !defined (ENVIRON_H)
  19 #define ENVIRON_H 1
  20
  21 /* We manipulate environments represented as these structures.  */
  22
  23 struct gdb_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 gdb_environ *make_environ (void);
  37
  38 extern void free_environ (struct gdb_environ *);
  39
  40 extern void init_environ (struct gdb_environ *);
  41
  42 extern char *get_in_environ (const struct gdb_environ *, const char *);
  43
  44 extern void set_in_environ (struct gdb_environ *, const char *, const char *);
  45
  46 extern void unset_in_environ (struct gdb_environ *, char *);
  47
  48 extern char **environ_vector (struct gdb_environ *);
  49
  50 #endif /* defined (ENVIRON_H) */