1 /* Routines for dealing with '\0' separated environment vectors
3 Copyright (C) 1995, 1996 Free Software Foundation, Inc.
5 Written by Miles Bader <miles@gnu.ai.mit.edu>
7 This program is free software; you can redistribute it and/or
8 modify it under the terms of the GNU General Public License as
9 published by the Free Software Foundation; either version 2, or (at
10 your option) any later version.
12 This program is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
26 /* Envz's are argz's too, and should be created etc., using the same
30 /* Returns a pointer to the entry in ENVZ for NAME, or 0 if there is none. */
31 char *envz_entry (const char *envz, size_t envz_len, const char *name);
33 /* Returns a pointer to the value portion of the entry in ENVZ for NAME, or 0
35 char *envz_get (const char *envz, size_t envz_len, const char *name);
37 /* Adds an entry for NAME with value VALUE to ENVZ & ENVZ_LEN. If an entry
38 with the same name already exists in ENVZ, it is removed. If VALUE is
39 NULL, then the new entry will a special null one, for which envz_get will
40 return NULL, although envz_entry will still return an entry; this is handy
41 because when merging with another envz, the null entry can override an
42 entry in the other one. Null entries can be removed with envz_strip (). */
43 error_t envz_add (char **envz, size_t *envz_len,
44 const char *name, const char *value);
46 /* Adds each entry in ENVZ2 to ENVZ & ENVZ_LEN, as if with envz_add(). If
47 OVERRIDE is true, then values in ENVZ2 will supercede those with the same
48 name in ENV, otherwise not. */
49 error_t envz_merge (char **envz, size_t *envz_len,
50 const char *envz2, size_t envz2_len,
53 /* Remove null entries. */
54 void envz_strip (char **envz, size_t *envz_len);
56 #endif /* __ENVZ_H__ */