contrib/gdb-6.2.1/gdb/environ.h

   1 /* Header for environment manipulation library.
   2    Copyright 1989, 1992, 2000 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 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 *make_environ (void);
  38
  39 extern void free_environ (struct environ *);
  40
  41 extern void init_environ (struct environ *);
  42
  43 extern char *get_in_environ (const struct environ *, const char *);
  44
  45 extern void set_in_environ (struct environ *, const char *, const char *);
  46
  47 extern void unset_in_environ (struct environ *, char *);
  48
  49 extern char **environ_vector (struct environ *);
  50
  51 #endif /* defined (ENVIRON_H) */