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Commit	Line	Data
	1	/*-
	2	* Copyright (c) 1991, 1993
	3	* The Regents of the University of California. All rights reserved.
	4	*
	5	* This code is derived from software contributed to Berkeley by
	6	* Kenneth Almquist.
	7	*
	8	* Redistribution and use in source and binary forms, with or without
	9	* modification, are permitted provided that the following conditions
	10	* are met:
	11	* 1. Redistributions of source code must retain the above copyright
	12	* notice, this list of conditions and the following disclaimer.
	13	* 2. Redistributions in binary form must reproduce the above copyright
	14	* notice, this list of conditions and the following disclaimer in the
	15	* documentation and/or other materials provided with the distribution.
	16	* 4. Neither the name of the University nor the names of its contributors
	17	* may be used to endorse or promote products derived from this software
	18	* without specific prior written permission.
	19	*
	20	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	21	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	22	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	23	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	24	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	25	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	26	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	27	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	28	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	29	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	30	* SUCH DAMAGE.
	31	*
	32	* @(#)var.h 8.2 (Berkeley) 5/4/95
	33	* $FreeBSD$
	34	*/
	35
	36	/*
	37	* Shell variables.
	38	*/
	39
	40	/* flags */
	41	#define VEXPORT 0x01 /* variable is exported */
	42	#define VREADONLY 0x02 /* variable cannot be modified */
	43	#define VSTRFIXED 0x04 /* variable struct is statically allocated */
	44	#define VTEXTFIXED 0x08 /* text is statically allocated */
	45	#define VSTACK 0x10 /* text is allocated on the stack */
	46	#define VUNSET 0x20 /* the variable is not set */
	47	#define VNOFUNC 0x40 /* don't call the callback function */
	48	#define VNOSET 0x80 /* do not set variable - just readonly test */
	49	#define VNOLOCAL 0x100 /* ignore forcelocal */
	50
	51
	52	struct var {
	53	struct var next; / next entry in hash list */
	54	int flags; /* flags are defined above */
	55	int name_len; /* length of name */
	56	char text; / name=value */
	57	void (func)(const char );
	58	/* function to be called when */
	59	/* the variable gets set/unset */
	60	};
	61
	62
	63	struct localvar {
	64	struct localvar next; / next local variable in list */
	65	struct var vp; / the variable that was made local */
	66	int flags; /* saved flags */
	67	char text; / saved text */
	68	};
	69
	70
	71	extern struct localvar *localvars;
	72	extern int forcelocal;
	73
	74	extern struct var vifs;
	75	extern struct var vmail;
	76	extern struct var vmpath;
	77	extern struct var vpath;
	78	extern struct var vps1;
	79	extern struct var vps2;
	80	extern struct var vps4;
	81	extern struct var vdisvfork;
	82	#ifndef NO_HISTORY
	83	extern struct var vhistsize;
	84	extern struct var vterm;
	85	#endif
	86
	87	extern int localeisutf8;
	88	/* The parser uses the locale that was in effect at startup. */
	89	extern int initial_localeisutf8;
	90
	91	/*
	92	* The following macros access the values of the above variables.
	93	* They have to skip over the name. They return the null string
	94	* for unset variables.
	95	*/
	96
	97	#define ifsval() (vifs.text + 4)
	98	#define ifsset() ((vifs.flags & VUNSET) == 0)
	99	#define mailval() (vmail.text + 5)
	100	#define mpathval() (vmpath.text + 9)
	101	#define pathval() (vpath.text + 5)
	102	#define ps1val() (vps1.text + 4)
	103	#define ps2val() (vps2.text + 4)
	104	#define ps4val() (vps4.text + 4)
	105	#define optindval() (voptind.text + 7)
	106	#ifndef NO_HISTORY
	107	#define histsizeval() (vhistsize.text + 9)
	108	#define termval() (vterm.text + 5)
	109	#endif
	110
	111	#define mpathset() ((vmpath.flags & VUNSET) == 0)
	112	#define disvforkset() ((vdisvfork.flags & VUNSET) == 0)
	113
	114	void initvar(void);
	115	void setvar(const char , const char , int);
	116	void setvareq(char *, int);
	117	struct strlist;
	118	void listsetvar(struct strlist *, int);
	119	char lookupvar(const char );
	120	char bltinlookup(const char , int);
	121	void bltinsetlocale(void);
	122	void bltinunsetlocale(void);
	123	void updatecharset(void);
	124	void initcharset(void);
	125	char **environment(void);
	126	int showvarscmd(int, char **);
	127	void mklocal(char *);
	128	void poplocalvars(void);
	129	int unsetvar(const char *);
	130	int setvarsafe(const char , const char , int);