+/* Header for environment manipulation library.
+ Copyright 1989, 1992 Free Software Foundation.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#if !defined (ENVIRON_H)
+#define ENVIRON_H 1
/* We manipulate environments represented as these structures. */
struct environ
-{
- /* Number of usable slots allocated in VECTOR.
- VECTOR always has one slot not counted here,
- to hold the terminating zero. */
- int allocated;
- /* A vector of slots, ALLOCATED + 1 of them.
- The first few slots contain strings "VAR=VALUE"
- and the next one contains zero.
- Then come some unused slots. */
- char **vector;
-};
-
-struct environ *make_environ ();
-void free_environ ();
-void init_environ ();
-char *get_in_environ ();
-void set_in_environ ();
-void unset_in_environ ();
-char **environ_vector ();
+ {
+ /* Number of usable slots allocated in VECTOR.
+ VECTOR always has one slot not counted here,
+ to hold the terminating zero. */
+ int allocated;
+ /* A vector of slots, ALLOCATED + 1 of them.
+ The first few slots contain strings "VAR=VALUE"
+ and the next one contains zero.
+ Then come some unused slots. */
+ char **vector;
+ };
+
+extern struct environ *make_environ (void);
+
+extern void free_environ (struct environ *);
+
+extern void init_environ (struct environ *);
+
+extern char *get_in_environ (const struct environ *, const char *);
+
+extern void set_in_environ (struct environ *, const char *, const char *);
+
+extern void unset_in_environ (struct environ *, char *);
+
+extern char **environ_vector (struct environ *);
+
+#endif /* defined (ENVIRON_H) */