1 /* Routines for dealing with '\0' separated environment vectors
2 Copyright (C) 1995,1996,1998, 1999,2000,2012 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the 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 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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 (const char *__restrict __envz
, size_t __envz_len
,
35 const char *__restrict __name
)
36 __THROW __attribute_pure__
;
38 /* Returns a pointer to the value portion of the entry in ENVZ for NAME, or 0
40 extern char *envz_get (const char *__restrict __envz
, size_t __envz_len
,
41 const char *__restrict __name
)
42 __THROW __attribute_pure__
;
44 /* Adds an entry for NAME with value VALUE to ENVZ & ENVZ_LEN. If an entry
45 with the same name already exists in ENVZ, it is removed. If VALUE is
46 NULL, then the new entry will a special null one, for which envz_get will
47 return NULL, although envz_entry will still return an entry; this is handy
48 because when merging with another envz, the null entry can override an
49 entry in the other one. Null entries can be removed with envz_strip (). */
50 extern error_t
envz_add (char **__restrict __envz
,
51 size_t *__restrict __envz_len
,
52 const char *__restrict __name
,
53 const char *__restrict __value
) __THROW
;
55 /* Adds each entry in ENVZ2 to ENVZ & ENVZ_LEN, as if with envz_add(). If
56 OVERRIDE is true, then values in ENVZ2 will supersede those with the same
57 name in ENV, otherwise not. */
58 extern error_t
envz_merge (char **__restrict __envz
,
59 size_t *__restrict __envz_len
,
60 const char *__restrict __envz2
,
61 size_t __envz2_len
, int __override
) __THROW
;
63 /* Remove the entry for NAME from ENVZ & ENVZ_LEN, if any. */
64 extern void envz_remove (char **__restrict __envz
,
65 size_t *__restrict __envz_len
,
66 const char *__restrict __name
) __THROW
;
68 /* Remove null entries. */
69 extern void envz_strip (char **__restrict __envz
,
70 size_t *__restrict __envz_len
) __THROW
;