| /* Routines for dealing with '\0' separated environment vectors |
| Copyright (C) 1995-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library 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 |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef _ENVZ_H |
| #define _ENVZ_H 1 |
| |
| #include <features.h> |
| |
| #include <errno.h> |
| |
| /* Envz's are argz's too, and should be created etc., using the same |
| routines. */ |
| #include <argz.h> |
| |
| __BEGIN_DECLS |
| |
| /* Returns a pointer to the entry in ENVZ for NAME, or 0 if there is none. */ |
| extern char *envz_entry (const char *__restrict __envz, size_t __envz_len, |
| const char *__restrict __name) |
| __THROW __attribute_pure__; |
| |
| /* Returns a pointer to the value portion of the entry in ENVZ for NAME, or 0 |
| if there is none. */ |
| extern char *envz_get (const char *__restrict __envz, size_t __envz_len, |
| const char *__restrict __name) |
| __THROW __attribute_pure__; |
| |
| /* 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 (). */ |
| extern error_t envz_add (char **__restrict __envz, |
| size_t *__restrict __envz_len, |
| const char *__restrict __name, |
| const char *__restrict __value) __THROW; |
| |
| /* Adds each entry in ENVZ2 to ENVZ & ENVZ_LEN, as if with envz_add(). If |
| OVERRIDE is true, then values in ENVZ2 will supersede those with the same |
| name in ENV, otherwise not. */ |
| extern error_t envz_merge (char **__restrict __envz, |
| size_t *__restrict __envz_len, |
| const char *__restrict __envz2, |
| size_t __envz2_len, int __override) __THROW; |
| |
| /* Remove the entry for NAME from ENVZ & ENVZ_LEN, if any. */ |
| extern void envz_remove (char **__restrict __envz, |
| size_t *__restrict __envz_len, |
| const char *__restrict __name) __THROW; |
| |
| /* Remove null entries. */ |
| extern void envz_strip (char **__restrict __envz, |
| size_t *__restrict __envz_len) __THROW; |
| |
| __END_DECLS |
| |
| #endif /* envz.h */ |