| The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 1 | /* $NetBSD: var.h,v 1.23 2004/10/02 12:16:53 dsl Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 1991, 1993 |
| 5 | * The Regents of the University of California. 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 | /* |
| 38 | * Shell variables. |
| 39 | */ |
| 40 | |
| 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 */ |
| 50 | |
| 51 | |
| 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 */ |
| 60 | }; |
| 61 | |
| 62 | |
| 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 */ |
| 68 | }; |
| 69 | |
| 70 | |
| 71 | struct localvar *localvars; |
| 72 | |
| 73 | #if ATTY |
| 74 | extern struct var vatty; |
| 75 | #endif |
| 76 | extern struct var vifs; |
| 77 | extern struct var vmpath; |
| 78 | extern struct var vpath; |
| 79 | extern struct var vps1; |
| 80 | extern struct var vps2; |
| 81 | extern struct var vps4; |
| 82 | #ifdef WITH_HISTORY |
| 83 | extern struct var vterm; |
| 84 | extern struct var vtermcap; |
| 85 | extern struct var vhistsize; |
| 86 | #endif |
| 87 | |
| 88 | /* |
| 89 | * The following macros access the values of the above variables. |
| 90 | * They have to skip over the name. They return the null string |
| 91 | * for unset variables. |
| 92 | */ |
| 93 | |
| 94 | #define ifsval() (vifs.text + 4) |
| 95 | #define ifsset() ((vifs.flags & VUNSET) == 0) |
| 96 | #define mpathval() (vmpath.text + 9) |
| 97 | #define pathval() (vpath.text + 5) |
| 98 | #define ps1val() (vps1.text + 4) |
| 99 | #define ps2val() (vps2.text + 4) |
| 100 | #define ps4val() (vps4.text + 4) |
| 101 | #define optindval() (voptind.text + 7) |
| 102 | #ifdef WITH_HISTORY |
| 103 | #define histsizeval() (vhistsize.text + 9) |
| 104 | #define termval() (vterm.text + 5) |
| 105 | #endif |
| 106 | |
| 107 | #if ATTY |
| 108 | #define attyset() ((vatty.flags & VUNSET) == 0) |
| 109 | #endif |
| 110 | #define mpathset() ((vmpath.flags & VUNSET) == 0) |
| 111 | |
| 112 | void initvar(void); |
| 113 | void setvar(const char *, const char *, int); |
| 114 | void setvareq(char *, int); |
| 115 | struct strlist; |
| 116 | void listsetvar(struct strlist *, int); |
| 117 | char *lookupvar(const char *); |
| 118 | char *bltinlookup(const char *, int); |
| 119 | char **environment(void); |
| 120 | void shprocvar(void); |
| 121 | int showvars(const char *, int, int); |
| 122 | int exportcmd(int, char **); |
| 123 | int localcmd(int, char **); |
| 124 | void mklocal(const char *, int); |
| 125 | void listmklocal(struct strlist *, int); |
| 126 | void poplocalvars(void); |
| 127 | int setvarcmd(int, char **); |
| 128 | int unsetcmd(int, char **); |
| 129 | int unsetvar(const char *, int); |
| 130 | int setvarsafe(const char *, const char *, int); |
| 131 | void print_quoted(const char *); |