Do not use .Xo/.Xc to work around ancient roff limits.
[netbsd-mini2440.git] / bin / sh / var.h
blob0a308028516e852f7ce767122e2c8b265cf69e26
1 /* $NetBSD: var.h,v 1.23 2004/10/02 12:16:53 dsl Exp $ */
3 /*-
4 * Copyright (c) 1991, 1993
5 * The Regents of the University of California. All rights reserved.
7 * This code is derived from software contributed to Berkeley by
8 * Kenneth Almquist.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
34 * @(#)var.h 8.2 (Berkeley) 5/4/95
38 * Shell variables.
41 /* flags */
42 #define VEXPORT 0x01 /* variable is exported */
43 #define VREADONLY 0x02 /* variable cannot be modified */
44 #define VSTRFIXED 0x04 /* variable struct is statically allocated */
45 #define VTEXTFIXED 0x08 /* text is statically allocated */
46 #define VSTACK 0x10 /* text is allocated on the stack */
47 #define VUNSET 0x20 /* the variable is not set */
48 #define VNOFUNC 0x40 /* don't call the callback function */
49 #define VNOSET 0x80 /* do not set variable - just readonly test */
52 struct var {
53 struct var *next; /* next entry in hash list */
54 int flags; /* flags are defined above */
55 char *text; /* name=value */
56 int name_len; /* length of name */
57 void (*func)(const char *);
58 /* function to be called when */
59 /* the variable gets set/unset */
63 struct localvar {
64 struct localvar *next; /* next local variable in list */
65 struct var *vp; /* the variable that was made local */
66 int flags; /* saved flags */
67 char *text; /* saved text */
71 extern struct localvar *localvars;
73 #if ATTY
74 extern struct var vatty;
75 #endif
76 extern struct var vifs;
77 extern struct var vmail;
78 extern struct var vmpath;
79 extern struct var vpath;
80 extern struct var vps1;
81 extern struct var vps2;
82 extern struct var vps4;
83 #ifndef SMALL
84 extern struct var vterm;
85 extern struct var vtermcap;
86 extern struct var vhistsize;
87 #endif
90 * The following macros access the values of the above variables.
91 * They have to skip over the name. They return the null string
92 * for unset variables.
95 #define ifsval() (vifs.text + 4)
96 #define ifsset() ((vifs.flags & VUNSET) == 0)
97 #define mailval() (vmail.text + 5)
98 #define mpathval() (vmpath.text + 9)
99 #define pathval() (vpath.text + 5)
100 #define ps1val() (vps1.text + 4)
101 #define ps2val() (vps2.text + 4)
102 #define ps4val() (vps4.text + 4)
103 #define optindval() (voptind.text + 7)
104 #ifndef SMALL
105 #define histsizeval() (vhistsize.text + 9)
106 #define termval() (vterm.text + 5)
107 #endif
109 #if ATTY
110 #define attyset() ((vatty.flags & VUNSET) == 0)
111 #endif
112 #define mpathset() ((vmpath.flags & VUNSET) == 0)
114 void initvar(void);
115 void setvar(const char *, const char *, int);
116 void setvareq(char *, int);
117 struct strlist;
118 void listsetvar(struct strlist *, int);
119 char *lookupvar(const char *);
120 char *bltinlookup(const char *, int);
121 char **environment(void);
122 void shprocvar(void);
123 int showvars(const char *, int, int);
124 int exportcmd(int, char **);
125 int localcmd(int, char **);
126 void mklocal(const char *, int);
127 void listmklocal(struct strlist *, int);
128 void poplocalvars(void);
129 int setvarcmd(int, char **);
130 int unsetcmd(int, char **);
131 int unsetvar(const char *, int);
132 int setvarsafe(const char *, const char *, int);
133 void print_quoted(const char *);