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 1.21 2011/05/08 16:15:50 jilles Exp $
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 */
56 struct var *next; /* next entry in hash list */
57 int flags; /* flags are defined above */
58 int name_len; /* length of name */
59 char *text; /* name=value */
60 void (*func)(const char *);
61 /* function to be called when */
62 /* the variable gets set/unset */
67 struct localvar *next; /* next local variable in list */
68 struct var *vp; /* the variable that was made local */
69 int flags; /* saved flags */
70 char *text; /* saved text */
74 struct localvar *localvars;
76 extern struct var vifs;
77 extern struct var vmail;
78 extern struct var vmpath;
79 extern struct var vpath;
80 extern struct var vppid;
81 extern struct var vps1;
82 extern struct var vps2;
83 extern struct var vps4;
85 extern struct var vhistsize;
86 extern struct var vterm;
89 extern int localeisutf8;
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)
104 #define ps4val() (vps4.text + 4)
105 #define optindval() (voptind.text + 7)
107 #define histsizeval() (vhistsize.text + 9)
108 #define termval() (vterm.text + 5)
111 #define mpathset() ((vmpath.flags & VUNSET) == 0)
114 void setvar(const char *, const char *, int);
115 void setvareq(char *, int);
117 void listsetvar(struct strlist *, int);
118 char *lookupvar(const char *);
119 char *bltinlookup(const char *, int);
120 void bltinsetlocale(void);
121 void bltinunsetlocale(void);
122 void updatecharset(void);
123 char **environment(void);
124 int showvarscmd(int, char **);
125 int exportcmd(int, char **);
126 int localcmd(int, char **);
127 void mklocal(char *);
128 void poplocalvars(void);
129 int setvarcmd(int, char **);
130 int unsetcmd(int, char **);
131 int unsetvar(const char *);
132 int setvarsafe(const char *, const char *, int);