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
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26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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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 $
38 * $DragonFly: src/bin/sh/var.h,v 1.3 2004/03/19 18:39:41 cpressey Exp $
46 #define VEXPORT 0x01 /* variable is exported */
47 #define VREADONLY 0x02 /* variable cannot be modified */
48 #define VSTRFIXED 0x04 /* variable struct is staticly allocated */
49 #define VTEXTFIXED 0x08 /* text is staticly allocated */
50 #define VSTACK 0x10 /* text is allocated on the stack */
51 #define VUNSET 0x20 /* the variable is not set */
52 #define VNOFUNC 0x40 /* don't call the callback function */
56 struct var *next; /* next entry in hash list */
57 int flags; /* flags are defined above */
58 char *text; /* name=value */
59 void (*func)(const char *);
60 /* function to be called when */
61 /* the variable gets set/unset */
66 struct localvar *next; /* next local variable in list */
67 struct var *vp; /* the variable that was made local */
68 int flags; /* saved flags */
69 char *text; /* saved text */
73 struct localvar *localvars;
76 extern struct var vatty;
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;
86 extern struct var vterm;
89 extern struct var vhistsize;
93 * The following macros access the values of the above variables.
94 * They have to skip over the name. They return the null string
95 * for unset variables.
98 #define ifsval() (vifs.text + 4)
99 #define ifsset() ((vifs.flags & VUNSET) == 0)
100 #define mailval() (vmail.text + 5)
101 #define mpathval() (vmpath.text + 9)
102 #define pathval() (vpath.text + 5)
103 #define ps1val() (vps1.text + 4)
104 #define ps2val() (vps2.text + 4)
106 #define termval() (vterm.text + 5)
108 #define optindval() (voptind.text + 7)
110 #define histsizeval() (vhistsize.text + 9)
114 #define attyset() ((vatty.flags & VUNSET) == 0)
116 #define mpathset() ((vmpath.flags & VUNSET) == 0)
119 void setvar(const char *, const char *, int);
120 void setvareq(char *, int);
122 void listsetvar(struct strlist *);
123 char *lookupvar(const char *);
124 char *bltinlookup(const char *, int);
125 char **environment(void);
126 void shprocvar(void);
127 int showvarscmd(int, char **);
128 int exportcmd(int, char **);
129 int localcmd(int, char **);
130 void mklocal(char *);
131 void poplocalvars(void);
132 int setvarcmd(int, char **);
133 int unsetcmd(int, char **);
134 int unsetvar(const char *);
135 int setvarsafe(const char *, const char *, int);