Contents of /trunk/mkinitrd-magellan/klibc/usr/dash/var.h
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Wed Aug 18 21:11:40 2010 UTC (13 years, 8 months ago) by niro
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Wed Aug 18 21:11:40 2010 UTC (13 years, 8 months ago) by niro
File MIME type: text/plain
File size: 4884 byte(s)
-updated to klibc-1.5.19
1 | /*- |
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. |
6 | * |
7 | * This code is derived from software contributed to Berkeley by |
8 | * Kenneth Almquist. |
9 | * |
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. |
21 | * |
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. |
33 | * |
34 | * @(#)var.h 8.2 (Berkeley) 5/4/95 |
35 | */ |
36 | |
37 | #include <stdint.h> |
38 | |
39 | /* |
40 | * Shell variables. |
41 | */ |
42 | |
43 | /* flags */ |
44 | #define VEXPORT 0x01 /* variable is exported */ |
45 | #define VREADONLY 0x02 /* variable cannot be modified */ |
46 | #define VSTRFIXED 0x04 /* variable struct is statically allocated */ |
47 | #define VTEXTFIXED 0x08 /* text is statically allocated */ |
48 | #define VSTACK 0x10 /* text is allocated on the stack */ |
49 | #define VUNSET 0x20 /* the variable is not set */ |
50 | #define VNOFUNC 0x40 /* don't call the callback function */ |
51 | #define VNOSET 0x80 /* do not set variable - just readonly test */ |
52 | #define VNOSAVE 0x100 /* when text is on the heap before setvareq */ |
53 | |
54 | |
55 | struct var { |
56 | struct var *next; /* next entry in hash list */ |
57 | int flags; /* flags are defined above */ |
58 | const char *text; /* name=value */ |
59 | void (*func)(const char *); |
60 | /* function to be called when */ |
61 | /* the variable gets set/unset */ |
62 | }; |
63 | |
64 | |
65 | struct localvar { |
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 | const char *text; /* saved text */ |
70 | }; |
71 | |
72 | |
73 | extern struct localvar *localvars; |
74 | extern struct var varinit[]; |
75 | |
76 | #if ATTY |
77 | #define vatty varinit[0] |
78 | #define vifs varinit[1] |
79 | #else |
80 | #define vifs varinit[0] |
81 | #endif |
82 | #define vmail (&vifs)[1] |
83 | #define vmpath (&vmail)[1] |
84 | #define vpath (&vmpath)[1] |
85 | #define vps1 (&vpath)[1] |
86 | #define vps2 (&vps1)[1] |
87 | #define vps4 (&vps2)[1] |
88 | #define voptind (&vps4)[1] |
89 | #ifndef SMALL |
90 | #define vterm (&voptind)[1] |
91 | #define vhistsize (&vterm)[1] |
92 | #endif |
93 | |
94 | #ifdef IFS_BROKEN |
95 | extern const char defifsvar[]; |
96 | #define defifs (defifsvar + 4) |
97 | #else |
98 | extern const char defifs[]; |
99 | #endif |
100 | extern const char defpathvar[]; |
101 | #define defpath (defpathvar + 5) |
102 | |
103 | /* |
104 | * The following macros access the values of the above variables. |
105 | * They have to skip over the name. They return the null string |
106 | * for unset variables. |
107 | */ |
108 | |
109 | #define ifsval() (vifs.text + 4) |
110 | #define ifsset() ((vifs.flags & VUNSET) == 0) |
111 | #define mailval() (vmail.text + 5) |
112 | #define mpathval() (vmpath.text + 9) |
113 | #define pathval() (vpath.text + 5) |
114 | #define ps1val() (vps1.text + 4) |
115 | #define ps2val() (vps2.text + 4) |
116 | #define ps4val() (vps4.text + 4) |
117 | #define optindval() (voptind.text + 7) |
118 | #ifndef SMALL |
119 | #define histsizeval() (vhistsize.text + 9) |
120 | #define termval() (vterm.text + 5) |
121 | #endif |
122 | |
123 | #if ATTY |
124 | #define attyset() ((vatty.flags & VUNSET) == 0) |
125 | #endif |
126 | #define mpathset() ((vmpath.flags & VUNSET) == 0) |
127 | |
128 | void initvar(void); |
129 | void setvar(const char *, const char *, int); |
130 | intmax_t setvarint(const char *, intmax_t, int); |
131 | void setvareq(char *, int); |
132 | struct strlist; |
133 | void listsetvar(struct strlist *, int); |
134 | char *lookupvar(const char *); |
135 | intmax_t lookupvarint(const char *); |
136 | char *bltinlookup(const char *); |
137 | char **listvars(int, int, char ***); |
138 | #define environment() listvars(VEXPORT, VUNSET, 0) |
139 | int showvars(const char *, int, int); |
140 | int exportcmd(int, char **); |
141 | int localcmd(int, char **); |
142 | void poplocalvars(void); |
143 | int unsetcmd(int, char **); |
144 | int unsetvar(const char *); |
145 | int varcmp(const char *, const char *); |
146 | |
147 | static inline int varequal(const char *a, const char *b) { |
148 | return !varcmp(a, b); |
149 | } |