gdb/environ.h

   1 /* Header for environment manipulation library.
   2    Copyright (C) 1989-2016 Free Software Foundation, Inc.
   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 3 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, see <http://www.gnu.org/licenses/>.  */
  16
  17 #if !defined (ENVIRON_H)
  18 #define ENVIRON_H 1
  19
  20 /* We manipulate environments represented as these structures.  */
  21
  22 struct gdb_environ
  23   {
  24     /* Number of usable slots allocated in VECTOR.
  25        VECTOR always has one slot not counted here,
  26        to hold the terminating zero.  */
  27     int allocated;
  28     /* A vector of slots, ALLOCATED + 1 of them.
  29        The first few slots contain strings "VAR=VALUE"
  30        and the next one contains zero.
  31        Then come some unused slots.  */
  32     char **vector;
  33   };
  34
  35 extern struct gdb_environ *make_environ (void);
  36
  37 extern void free_environ (struct gdb_environ *);
  38
  39 extern void init_environ (struct gdb_environ *);
  40
  41 extern char *get_in_environ (const struct gdb_environ *, const char *);
  42
  43 extern void set_in_environ (struct gdb_environ *, const char *, const char *);
  44
  45 extern void unset_in_environ (struct gdb_environ *, const char *);
  46
  47 extern char **environ_vector (struct gdb_environ *);
  48
  49 #endif /* defined (ENVIRON_H) */