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/* $NetBSD: var.h,v 1.23 2004/10/02 12:16:53 dsl Exp $ */
/*-
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Kenneth Almquist.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)var.h 8.2 (Berkeley) 5/4/95
*/
/*
* Shell variables.
*/
/* flags */
#define VEXPORT 0x01 /* variable is exported */
#define VREADONLY 0x02 /* variable cannot be modified */
#define VSTRFIXED 0x04 /* variable struct is statically allocated */
#define VTEXTFIXED 0x08 /* text is statically allocated */
#define VSTACK 0x10 /* text is allocated on the stack */
#define VUNSET 0x20 /* the variable is not set */
#define VNOFUNC 0x40 /* don't call the callback function */
#define VNOSET 0x80 /* do not set variable - just readonly test */
struct var {
struct var *next; /* next entry in hash list */
int flags; /* flags are defined above */
char *text; /* name=value */
int name_len; /* length of name */
void (*func)(const char *);
/* function to be called when */
/* the variable gets set/unset */
};
struct localvar {
struct localvar *next; /* next local variable in list */
struct var *vp; /* the variable that was made local */
int flags; /* saved flags */
char *text; /* saved text */
};
struct localvar *localvars;
#if ATTY
extern struct var vatty;
#endif
extern struct var vifs;
extern struct var vmpath;
extern struct var vpath;
extern struct var vps1;
extern struct var vps2;
extern struct var vps4;
#ifdef WITH_HISTORY
extern struct var vterm;
extern struct var vtermcap;
extern struct var vhistsize;
#endif
/*
* The following macros access the values of the above variables.
* They have to skip over the name. They return the null string
* for unset variables.
*/
#define ifsval() (vifs.text + 4)
#define ifsset() ((vifs.flags & VUNSET) == 0)
#define mpathval() (vmpath.text + 9)
#define pathval() (vpath.text + 5)
#define ps1val() (vps1.text + 4)
#define ps2val() (vps2.text + 4)
#define ps4val() (vps4.text + 4)
#define optindval() (voptind.text + 7)
#ifdef WITH_HISTORY
#define histsizeval() (vhistsize.text + 9)
#define termval() (vterm.text + 5)
#endif
#if ATTY
#define attyset() ((vatty.flags & VUNSET) == 0)
#endif
#define mpathset() ((vmpath.flags & VUNSET) == 0)
void initvar(void);
void setvar(const char *, const char *, int);
void setvareq(char *, int);
struct strlist;
void listsetvar(struct strlist *, int);
char *lookupvar(const char *);
char *bltinlookup(const char *, int);
char **environment(void);
void shprocvar(void);
int showvars(const char *, int, int);
int exportcmd(int, char **);
int localcmd(int, char **);
void mklocal(const char *, int);
void listmklocal(struct strlist *, int);
void poplocalvars(void);
int setvarcmd(int, char **);
int unsetcmd(int, char **);
int unsetvar(const char *, int);
int setvarsafe(const char *, const char *, int);
void print_quoted(const char *);
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