1 /* Routines for dealing with '\0' separated environment vectors
2 Copyright (C) 1995, 1996, 1998 Free Software Foundation, Inc.
3 Written by Miles Bader <miles@gnu.ai.mit.edu>
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
15 You should have received a copy of the GNU Library General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If not,
17 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA. */
27 /* Envz's are argz's too, and should be created etc., using the same
33 /* Returns a pointer to the entry in ENVZ for NAME, or 0 if there is none. */
34 extern char *envz_entry __P ((__const char *__restrict __envz,
36 __const char *__restrict __name));
38 /* Returns a pointer to the value portion of the entry in ENVZ for NAME, or 0
40 extern char *envz_get __P ((__const char *__restrict __envz, size_t __envz_len,
41 __const char *__restrict __name));
43 /* Adds an entry for NAME with value VALUE to ENVZ & ENVZ_LEN. If an entry
44 with the same name already exists in ENVZ, it is removed. If VALUE is
45 NULL, then the new entry will a special null one, for which envz_get will
46 return NULL, although envz_entry will still return an entry; this is handy
47 because when merging with another envz, the null entry can override an
48 entry in the other one. Null entries can be removed with envz_strip (). */
49 extern error_t envz_add __P ((char **__restrict __envz,
50 size_t *__restrict __envz_len,
51 __const char *__restrict __name,
52 __const char *__restrict __value));
54 /* Adds each entry in ENVZ2 to ENVZ & ENVZ_LEN, as if with envz_add(). If
55 OVERRIDE is true, then values in ENVZ2 will supersede those with the same
56 name in ENV, otherwise not. */
57 extern error_t envz_merge __P ((char **__restrict __envz,
58 size_t *__restrict __envz_len,
59 __const char *__restrict __envz2,
60 size_t __envz2_len, int __override));
62 /* Remove the entry for NAME from ENVZ & ENVZ_LEN, if any. */
63 extern void envz_remove __P ((char **__restrict __envz,
64 size_t *__restrict __envz_len,
65 __const char *__restrict __name));
67 /* Remove null entries. */
68 extern void envz_strip __P ((char **__restrict __envz,
69 size_t *__restrict __envz_len));