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59 lines
2.3 KiB
C
59 lines
2.3 KiB
C
/* Routines for dealing with '\0' separated environment vectors
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Copyright (C) 1995, 1996 Free Software Foundation, Inc.
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Written by Miles Bader <miles@gnu.ai.mit.edu>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2, or (at
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your option) any later version.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#ifndef __ENVZ_H__
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#define __ENVZ_H__
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#include <errno.h>
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/* Envz's are argz's too, and should be created etc., using the same
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routines. */
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#include <argz.h>
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/* Returns a pointer to the entry in ENVZ for NAME, or 0 if there is none. */
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char *envz_entry __P ((__const char *__envz, size_t __envz_len,
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__const char *__name));
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/* Returns a pointer to the value portion of the entry in ENVZ for NAME, or 0
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if there is none. */
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char *envz_get __P ((__const char *__envz, size_t __envz_len,
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__const char *__name));
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/* Adds an entry for NAME with value VALUE to ENVZ & ENVZ_LEN. If an entry
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with the same name already exists in ENVZ, it is removed. If VALUE is
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NULL, then the new entry will a special null one, for which envz_get will
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return NULL, although envz_entry will still return an entry; this is handy
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because when merging with another envz, the null entry can override an
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entry in the other one. Null entries can be removed with envz_strip (). */
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error_t envz_add __P ((char **__envz, size_t *__envz_len,
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__const char *__name, __const char *__value));
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/* Adds each entry in ENVZ2 to ENVZ & ENVZ_LEN, as if with envz_add(). If
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OVERRIDE is true, then values in ENVZ2 will supercede those with the same
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name in ENV, otherwise not. */
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error_t envz_merge __P ((char **__envz, size_t *__envz_len,
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__const char *__envz2, size_t __envz2_len,
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int __override));
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/* Remove null entries. */
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void envz_strip __P ((char **__envz, size_t *__envz_len));
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#endif /* __ENVZ_H__ */
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