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/* 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__ */
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