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: src/bin/sh/var.h,v 1.8.2.1 2002/07/19 04:38:52 tjr Exp $
45 #define VEXPORT 0x01 /* variable is exported */
46 #define VREADONLY 0x02 /* variable cannot be modified */
47 #define VSTRFIXED 0x04 /* variable struct is staticly allocated */
48 #define VTEXTFIXED 0x08 /* text is staticly 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 */
55 struct var *next; /* next entry in hash list */
56 int flags; /* flags are defined above */
57 char *text; /* name=value */
58 void (*func)(const char *);
59 /* function to be called when */
60 /* the variable gets set/unset */
65 struct localvar *next; /* next local variable in list */
66 struct var *vp; /* the variable that was made local */
67 int flags; /* saved flags */
68 char *text; /* saved text */
72 struct localvar *localvars;
75 extern struct var vatty;
77 extern struct var vifs;
78 extern struct var vmail;
79 extern struct var vmpath;
80 extern struct var vpath;
81 extern struct var vppid;
82 extern struct var vps1;
83 extern struct var vps2;
85 extern struct var vterm;
88 extern struct var vhistsize;
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.
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)
105 #define termval() (vterm.text + 5)
107 #define optindval() (voptind.text + 7)
109 #define histsizeval() (vhistsize.text + 9)
113 #define attyset() ((vatty.flags & VUNSET) == 0)
115 #define mpathset() ((vmpath.flags & VUNSET) == 0)
118 void setvar(char *, char *, int);
119 void setvareq(char *, int);
121 void listsetvar(struct strlist *);
122 char *lookupvar(char *);
123 char *bltinlookup(char *, int);
124 char **environment(void);
125 void shprocvar(void);
126 int showvarscmd(int, char **);
127 int exportcmd(int, char **);
128 int localcmd(int, char **);
129 void mklocal(char *);
130 void poplocalvars(void);
131 int setvarcmd(int, char **);
132 int unsetcmd(int, char **);
133 int unsetvar(char *);
134 int setvarsafe(char *, char *, int);