2
* Copyright (c) 1991, 1993
3
* The Regents of the University of California. All rights reserved.
4
* Copyright (c) 1997-2005
5
* Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved.
7
* This code is derived from software contributed to Berkeley by
10
* Redistribution and use in source and binary forms, with or without
11
* modification, are permitted provided that the following conditions
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
34
* @(#)var.h 8.2 (Berkeley) 5/4/95
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 */
50
#define VNOSAVE 0x100 /* when text is on the heap before setvareq */
54
struct var *next; /* next entry in hash list */
55
int flags; /* flags are defined above */
56
const char *text; /* name=value */
57
void (*func)(const char *);
58
/* function to be called when */
59
/* the variable gets set/unset */
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
const char *text; /* saved text */
71
extern struct localvar *localvars;
72
extern struct var varinit[];
75
#define vatty varinit[0]
76
#define vifs varinit[1]
78
#define vifs varinit[0]
80
#define vmail (&vifs)[1]
81
#define vmpath (&vmail)[1]
82
#define vpath (&vmpath)[1]
83
#define vps1 (&vpath)[1]
84
#define vps2 (&vps1)[1]
85
#define vps4 (&vps2)[1]
86
#define voptind (&vps4)[1]
88
#define vterm (&voptind)[1]
89
#define vhistsize (&vterm)[1]
93
extern const char defifsvar[];
94
#define defifs (defifsvar + 4)
96
extern const char defifs[];
98
extern const char defpathvar[];
99
#define defpath (defpathvar + 5)
102
* The following macros access the values of the above variables.
103
* They have to skip over the name. They return the null string
104
* for unset variables.
107
#define ifsval() (vifs.text + 4)
108
#define ifsset() ((vifs.flags & VUNSET) == 0)
109
#define mailval() (vmail.text + 5)
110
#define mpathval() (vmpath.text + 9)
111
#define pathval() (vpath.text + 5)
112
#define ps1val() (vps1.text + 4)
113
#define ps2val() (vps2.text + 4)
114
#define ps4val() (vps4.text + 4)
115
#define optindval() (voptind.text + 7)
117
#define histsizeval() (vhistsize.text + 9)
118
#define termval() (vterm.text + 5)
122
#define attyset() ((vatty.flags & VUNSET) == 0)
124
#define mpathset() ((vmpath.flags & VUNSET) == 0)
127
void setvar(const char *, const char *, int);
128
void setvareq(char *, int);
130
void listsetvar(struct strlist *, int);
131
char *lookupvar(const char *);
132
char *bltinlookup(const char *);
133
char **listvars(int, int, char ***);
134
#define environment() listvars(VEXPORT, VUNSET, 0)
135
int showvars(const char *, int, int);
136
int exportcmd(int, char **);
137
int localcmd(int, char **);
138
void poplocalvars(void);
139
int unsetcmd(int, char **);
140
int unsetvar(const char *);
141
int setvarsafe(const char *, const char *, int);
142
int varcmp(const char *, const char *);
144
static inline int varequal(const char *a, const char *b) {
145
return !varcmp(a, b);