1 files changed, 55 insertions, 0 deletions
diff --git a/string/envz.h b/string/envz.h
new file mode 100644
index 0000000000..55224c72ad
--- /dev/null
+++ b/string/envz.h
@@ -0,0 +1,55 @@
+/* Routines for dealing with '\0' separated environment vectors
+
+   Copyright (C) 1995 Free Software Foundation, Inc.
+
+   Written by Miles Bader <miles@gnu.ai.mit.edu>
+
+   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, 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#ifndef __ENVZ_H__
+#define __ENVZ_H__
+
+#include <errno.h>
+
+/* Envz's are argz's too, and should be created etc., using the same
+   routines.  */
+#include <argz.h>
+
+/* Returns a pointer to the entry in ENVZ for NAME, or 0 if there is none.  */
+char *envz_entry (char *envz, unsigned envz_len, char *name);
+
+/* Returns a pointer to the value portion of the entry in ENVZ for NAME, or 0
+   if there is none.  */
+char *envz_get (char *envz, unsigned envz_len, char *name);
+
+/* Adds an entry for NAME with value VALUE to ENVZ & ENVZ_LEN.  If an entry
+   with the same name already exists in ENVZ, it is removed.  If VALUE is
+   NULL, then the new entry will a special null one, for which envz_get will
+   return NULL, although envz_entry will still return an entry; this is handy
+   because when merging with another envz, the null entry can override an
+   entry in the other one.  Null entries can be removed with envz_strip ().  */
+error_t envz_add (char **envz, unsigned *envz_len, char *name, char *value);
+
+/* Adds each entry in ENVZ2 to ENVZ & ENVZ_LEN, as if with envz_add().  If
+   OVERRIDE is true, then values in ENVZ2 will supercede those with the same
+   name in ENV, otherwise not.  */
+error_t
+envz_merge (char **envz, unsigned *envz_len, char *envz2, unsigned envz2_len,
+	    int override);
+
+/* Remove null entries.  */
+void envz_strip (char **envz, unsigned *envz_len);
+
+#endif /* __ENVZ_H__ */