summary refs log tree commit diff
path: root/bin/cash/var.h
blob: 9ebb7765ddfd57a89f8eef4e69300e0b8e93070b (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * 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
 * $FreeBSD: releng/12.0/bin/sh/var.h 326025 2017-11-20 19:49:47Z pfg $
 */

/*
 * 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 */
#define VNOLOCAL	0x100	/* ignore forcelocal */


struct var {
	struct var *next;		/* next entry in hash list */
	int flags;			/* flags are defined above */
	int name_len;			/* length of name */
	char *text;			/* name=value */
	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 */
};


extern struct localvar *localvars;
extern int forcelocal;

extern struct var vifs;
extern struct var vmail;
extern struct var vmpath;
extern struct var vpath;
extern struct var vps1;
extern struct var vps2;
extern struct var vps4;
extern struct var vrps1;
extern struct var vrps2;
extern struct var vdisvfork;
#ifndef NO_HISTORY
extern struct var vhistsize;
extern struct var vterm;
#endif

extern int localeisutf8;
/* The parser uses the locale that was in effect at startup. */
extern int initial_localeisutf8;

/*
 * 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 mailval()	(vmail.text + 5)
#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 rps1val()	(vrps1.text + 5)
#define rps2val()	(vrps2.text + 5)
#define optindval()	(voptind.text + 7)
#ifndef NO_HISTORY
#define histsizeval()	(vhistsize.text + 9)
#define termval()	(vterm.text + 5)
#endif

#define mpathset()	((vmpath.flags & VUNSET) == 0)
#define disvforkset()	((vdisvfork.flags & VUNSET) == 0)

void initvar(void);
void setvar(const char *, const char *, int);
void setvareq(char *, int);
struct arglist;
void listsetvar(struct arglist *, int);
char *lookupvar(const char *);
char *bltinlookup(const char *, int);
void bltinsetlocale(void);
void bltinunsetlocale(void);
void updatecharset(void);
void initcharset(void);
char **environment(void);
int showvarscmd(int, char **);
void mklocal(char *);
void poplocalvars(void);
int unsetvar(const char *);
int setvarsafe(const char *, const char *, int);