envz.h
上传用户:szlgq88
上传日期:2009-04-28
资源大小:48287k
文件大小:3k
- /* Routines for dealing with ' ' separated environment vectors
- Copyright (C) 1995, 96, 98, 99, 2000 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, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
- #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 */