2 * Copyright (c) 1991, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * @(#)var.h 8.2 (Berkeley) 5/4/95
37 * $FreeBSD: head/bin/sh/var.h 230998 2012-02-04 23:12:14Z jilles $
45 #define VEXPORT 0x01 /* variable is exported */
46 #define VREADONLY 0x02 /* variable cannot be modified */
47 #define VSTRFIXED 0x04 /* variable struct is statically allocated */
48 #define VTEXTFIXED 0x08 /* text is statically allocated */
49 #define VSTACK 0x10 /* text is allocated on the stack */
50 #define VUNSET 0x20 /* the variable is not set */
51 #define VNOFUNC 0x40 /* don't call the callback function */
52 #define VNOSET 0x80 /* do not set variable - just readonly test */
53 #define VNOLOCAL 0x100 /* ignore forcelocal */
57 struct var *next; /* next entry in hash list */
58 int flags; /* flags are defined above */
59 int name_len; /* length of name */
60 char *text; /* name=value */
61 void (*func)(const char *);
62 /* function to be called when */
63 /* the variable gets set/unset */
68 struct localvar *next; /* next local variable in list */
69 struct var *vp; /* the variable that was made local */
70 int flags; /* saved flags */
71 char *text; /* saved text */
75 struct localvar *localvars;
76 extern int forcelocal;
78 extern struct var vifs;
79 extern struct var vmail;
80 extern struct var vmpath;
81 extern struct var vpath;
82 extern struct var vppid;
83 extern struct var vps1;
84 extern struct var vps2;
85 extern struct var vps4;
86 extern struct var vdisvfork;
88 extern struct var vhistsize;
89 extern struct var vterm;
92 extern int localeisutf8;
93 /* The parser uses the locale that was in effect at startup. */
94 extern int initial_localeisutf8;
97 * The following macros access the values of the above variables.
98 * They have to skip over the name. They return the null string
99 * for unset variables.
102 #define ifsval() (vifs.text + 4)
103 #define ifsset() ((vifs.flags & VUNSET) == 0)
104 #define mailval() (vmail.text + 5)
105 #define mpathval() (vmpath.text + 9)
106 #define pathval() (vpath.text + 5)
107 #define ps1val() (vps1.text + 4)
108 #define ps2val() (vps2.text + 4)
109 #define ps4val() (vps4.text + 4)
110 #define optindval() (voptind.text + 7)
112 #define histsizeval() (vhistsize.text + 9)
113 #define termval() (vterm.text + 5)
116 #define mpathset() ((vmpath.flags & VUNSET) == 0)
117 #define disvforkset() ((vdisvfork.flags & VUNSET) == 0)
120 void setvar(const char *, const char *, int);
121 void setvareq(char *, int);
123 void listsetvar(struct strlist *, int);
124 char *lookupvar(const char *);
125 char *bltinlookup(const char *, int);
126 void bltinsetlocale(void);
127 void bltinunsetlocale(void);
128 void updatecharset(void);
129 void initcharset(void);
130 char **environment(void);
131 int showvarscmd(int, char **);
132 void mklocal(char *);
133 void poplocalvars(void);
134 int unsetvar(const char *);
135 int setvarsafe(const char *, const char *, int);