/* Header for environment manipulation library.
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/* Header for environment manipulation library.
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Copyright 1989, 1992, 2000 Free Software Foundation, Inc.
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Copyright 1989, 1992, 2000 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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Boston, MA 02111-1307, USA. */
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#if !defined (ENVIRON_H)
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#if !defined (ENVIRON_H)
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#define ENVIRON_H 1
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#define ENVIRON_H 1
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/* We manipulate environments represented as these structures. */
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/* We manipulate environments represented as these structures. */
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struct environ
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struct environ
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{
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{
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/* Number of usable slots allocated in VECTOR.
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/* Number of usable slots allocated in VECTOR.
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VECTOR always has one slot not counted here,
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VECTOR always has one slot not counted here,
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to hold the terminating zero. */
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to hold the terminating zero. */
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int allocated;
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int allocated;
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/* A vector of slots, ALLOCATED + 1 of them.
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/* A vector of slots, ALLOCATED + 1 of them.
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The first few slots contain strings "VAR=VALUE"
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The first few slots contain strings "VAR=VALUE"
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and the next one contains zero.
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and the next one contains zero.
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Then come some unused slots. */
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Then come some unused slots. */
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char **vector;
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char **vector;
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};
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};
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extern struct environ *make_environ (void);
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extern struct environ *make_environ (void);
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extern void free_environ (struct environ *);
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extern void free_environ (struct environ *);
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extern void init_environ (struct environ *);
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extern void init_environ (struct environ *);
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extern char *get_in_environ (const struct environ *, const char *);
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extern char *get_in_environ (const struct environ *, const char *);
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extern void set_in_environ (struct environ *, const char *, const char *);
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extern void set_in_environ (struct environ *, const char *, const char *);
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extern void unset_in_environ (struct environ *, char *);
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extern void unset_in_environ (struct environ *, char *);
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extern char **environ_vector (struct environ *);
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extern char **environ_vector (struct environ *);
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#endif /* defined (ENVIRON_H) */
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#endif /* defined (ENVIRON_H) */
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